Class: Aws::ElastiCache::Client

Inherits:
Seahorse::Client::Base
  • Object
show all
Includes:
ClientStubs
Defined in:
lib/aws-sdk-elasticache/client.rb

Class Attribute Summary collapse

API Operations collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Client

Returns a new instance of Client.

Parameters:

  • options (Hash)

Options Hash (options):

  • :credentials (required, Aws::CredentialProvider) —

    Your AWS credentials. This can be an instance of any one of the following classes:

    • ‘Aws::Credentials` - Used for configuring static, non-refreshing credentials.

    • ‘Aws::InstanceProfileCredentials` - Used for loading credentials from an EC2 IMDS on an EC2 instance.

    • ‘Aws::SharedCredentials` - Used for loading credentials from a shared file, such as `~/.aws/config`.

    • ‘Aws::AssumeRoleCredentials` - Used when you need to assume a role.

    When ‘:credentials` are not configured directly, the following locations will be searched for credentials:

    • ‘Aws.config`

    • The ‘:access_key_id`, `:secret_access_key`, and `:session_token` options.

    • ENV, ENV

    • ‘~/.aws/credentials`

    • ‘~/.aws/config`

    • EC2 IMDS instance profile - When used by default, the timeouts are very aggressive. Construct and pass an instance of ‘Aws::InstanceProfileCredentails` to enable retries and extended timeouts.

  • :region (required, String) —

    The AWS region to connect to. The configured ‘:region` is used to determine the service `:endpoint`. When not passed, a default `:region` is search for in the following locations:

  • :access_key_id (String)
  • :active_endpoint_cache (Boolean) — default: false —

    When set to ‘true`, a thread polling for endpoints will be running in the background every 60 secs (default). Defaults to `false`.

  • :client_side_monitoring (Boolean) — default: false —

    When ‘true`, client-side metrics will be collected for all API requests from this client.

  • :client_side_monitoring_client_id (String) — default: "" —

    Allows you to provide an identifier for this client which will be attached to all generated client side metrics. Defaults to an empty string.

  • :client_side_monitoring_port (Integer) — default: 31000 —

    Required for publishing client metrics. The port that the client side monitoring agent is running on, where client metrics will be published via UDP.

  • :client_side_monitoring_publisher (Aws::ClientSideMonitoring::Publisher) — default: Aws::ClientSideMonitoring::Publisher —

    Allows you to provide a custom client-side monitoring publisher class. By default, will use the Client Side Monitoring Agent Publisher.

  • :convert_params (Boolean) — default: true —

    When ‘true`, an attempt is made to coerce request parameters into the required types.

  • :disable_host_prefix_injection (Boolean) — default: false —

    Set to true to disable SDK automatically adding host prefix to default service endpoint when available.

  • :endpoint (String) —

    The client endpoint is normally constructed from the ‘:region` option. You should only configure an `:endpoint` when connecting to test endpoints. This should be avalid HTTP(S) URI.

  • :endpoint_cache_max_entries (Integer) — default: 1000 —

    Used for the maximum size limit of the LRU cache storing endpoints data for endpoint discovery enabled operations. Defaults to 1000.

  • :endpoint_cache_max_threads (Integer) — default: 10 —

    Used for the maximum threads in use for polling endpoints to be cached, defaults to 10.

  • :endpoint_cache_poll_interval (Integer) — default: 60 —

    When :endpoint_discovery and :active_endpoint_cache is enabled, Use this option to config the time interval in seconds for making requests fetching endpoints information. Defaults to 60 sec.

  • :endpoint_discovery (Boolean) — default: false —

    When set to ‘true`, endpoint discovery will be enabled for operations when available. Defaults to `false`.

  • :log_formatter (Aws::Log::Formatter) — default: Aws::Log::Formatter.default —

    The log formatter.

  • :log_level (Symbol) — default: :info —

    The log level to send messages to the ‘:logger` at.

  • :logger (Logger) —

    The Logger instance to send log messages to. If this option is not set, logging will be disabled.

  • :profile (String) — default: "default" —

    Used when loading credentials from the shared credentials file at HOME/.aws/credentials. When not specified, ‘default’ is used.

  • :retry_base_delay (Float) — default: 0.3 —

    The base delay in seconds used by the default backoff function.

  • :retry_jitter (Symbol) — default: :none —

    A delay randomiser function used by the default backoff function. Some predefined functions can be referenced by name - :none, :equal, :full, otherwise a Proc that takes and returns a number.

    @see www.awsarchitectureblog.com/2015/03/backoff.html

  • :retry_limit (Integer) — default: 3 —

    The maximum number of times to retry failed requests. Only ~ 500 level server errors and certain ~ 400 level client errors are retried. Generally, these are throttling errors, data checksum errors, networking errors, timeout errors and auth errors from expired credentials.

  • :retry_max_delay (Integer) — default: 0 —

    The maximum number of seconds to delay between retries (0 for no limit) used by the default backoff function.

  • :secret_access_key (String)
  • :session_token (String)
  • :stub_responses (Boolean) — default: false —

    Causes the client to return stubbed responses. By default fake responses are generated and returned. You can specify the response data to return or errors to raise by calling ClientStubs#stub_responses. See ClientStubs for more information.

    ** Please note ** When response stubbing is enabled, no HTTP requests are made, and retries are disabled.

  • :validate_params (Boolean) — default: true —

    When ‘true`, request parameters are validated before sending the request.



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# File 'lib/aws-sdk-elasticache/client.rb', line 202

def initialize(*args)
  super
end

Class Attribute Details

.identifier ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/aws-sdk-elasticache/client.rb', line 7704

def identifier
  @identifier
end

Class Method Details

.errors_module ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/aws-sdk-elasticache/client.rb', line 7707

def errors_module
  Errors
end

Instance Method Details

#add_tags_to_resource(params = {}) ⇒ Types::TagListMessage

Adds up to 50 cost allocation tags to the named resource. A cost allocation tag is a key-value pair where the key and value are case-sensitive. You can use cost allocation tags to categorize and track your AWS costs.

When you apply tags to your ElastiCache resources, AWS generates a cost allocation report as a comma-separated value (CSV) file with your usage and costs aggregated by your tags. You can apply tags that represent business categories (such as cost centers, application names, or owners) to organize your costs across multiple services. For more information, see [Using Cost Allocation Tags in Amazon ElastiCache] in the *ElastiCache User Guide*.

[1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Tagging.html

Examples:

Example: AddTagsToResource


# Adds up to 10 tags, key/value pairs, to a cluster or snapshot resource.

resp = client.add_tags_to_resource({
  resource_name: "arn:aws:elasticache:us-east-1:1234567890:cluster:my-mem-cluster", 
  tags: [
    {
      key: "APIVersion", 
      value: "20150202", 
    }, 
    {
      key: "Service", 
      value: "ElastiCache", 
    }, 
  ], 
})

resp.to_h outputs the following:
{
  tag_list: [
    {
      key: "APIVersion", 
      value: "20150202", 
    }, 
    {
      key: "Service", 
      value: "ElastiCache", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.add_tags_to_resource({
  resource_name: "String", # required
  tags: [ # required
    {
      key: "String",
      value: "String",
    },
  ],
})

Response structure


resp.tag_list #=> Array
resp.tag_list[0].key #=> String
resp.tag_list[0].value #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :resource_name (required, String) —

    The Amazon Resource Name (ARN) of the resource to which the tags are to be added, for example ‘arn:aws:elasticache:us-west-2:0123456789:cluster:myCluster` or `arn:aws:elasticache:us-west-2:0123456789:snapshot:mySnapshot`. ElastiCache resources are cluster and snapshot.

    For more information about ARNs, see [Amazon Resource Names (ARNs) and AWS Service Namespaces].

    [1]: docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html

  • :tags (required, Array<Types::Tag>) —

    A list of cost allocation tags to be added to this resource. A tag is a key-value pair. A tag key must be accompanied by a tag value.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 302

def add_tags_to_resource(params = {}, options = {})
  req = build_request(:add_tags_to_resource, params)
  req.send_request(options)
end

#authorize_cache_security_group_ingress(params = {}) ⇒ Types::AuthorizeCacheSecurityGroupIngressResult

Allows network ingress to a cache security group. Applications using ElastiCache must be running on Amazon EC2, and Amazon EC2 security groups are used as the authorization mechanism.

<note markdown=“1”> You cannot authorize ingress from an Amazon EC2 security group in one region to an ElastiCache cluster in another region.

</note>

Examples:

Example: AuthorizeCacheCacheSecurityGroupIngress


# Allows network ingress to a cache security group. Applications using ElastiCache must be running on Amazon EC2. Amazon
# EC2 security groups are used as the authorization mechanism.

resp = client.authorize_cache_security_group_ingress({
  cache_security_group_name: "my-sec-grp", 
  ec2_security_group_name: "my-ec2-sec-grp", 
  ec2_security_group_owner_id: "1234567890", 
})

Request syntax with placeholder values


resp = client.authorize_cache_security_group_ingress({
  cache_security_group_name: "String", # required
  ec2_security_group_name: "String", # required
  ec2_security_group_owner_id: "String", # required
})

Response structure


resp.cache_security_group.owner_id #=> String
resp.cache_security_group.cache_security_group_name #=> String
resp.cache_security_group.description #=> String
resp.cache_security_group.ec2_security_groups #=> Array
resp.cache_security_group.ec2_security_groups[0].status #=> String
resp.cache_security_group.ec2_security_groups[0].ec2_security_group_name #=> String
resp.cache_security_group.ec2_security_groups[0].ec2_security_group_owner_id #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_security_group_name (required, String) —

    The cache security group that allows network ingress.

  • :ec2_security_group_name (required, String) —

    The Amazon EC2 security group to be authorized for ingress to the cache security group.

  • :ec2_security_group_owner_id (required, String) —

    The AWS account number of the Amazon EC2 security group owner. Note that this is not the same thing as an AWS access key ID - you must provide a valid AWS account number for this parameter.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 366

def authorize_cache_security_group_ingress(params = {}, options = {})
  req = build_request(:authorize_cache_security_group_ingress, params)
  req.send_request(options)
end

#build_request(operation_name, params = {}) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Parameters:

  • params ({}) (defaults to: {}) 


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# File 'lib/aws-sdk-elasticache/client.rb', line 7563

def build_request(operation_name, params = {})
  handlers = @handlers.for(operation_name)
  context = Seahorse::Client::RequestContext.new(
    operation_name: operation_name,
    operation: config.api.operation(operation_name),
    client: self,
    params: params,
    config: config)
  context[:gem_name] = 'aws-sdk-elasticache'
  context[:gem_version] = '1.10.0'
  Seahorse::Client::Request.new(handlers, context)
end

#copy_snapshot(params = {}) ⇒ Types::CopySnapshotResult

Makes a copy of an existing snapshot.

<note markdown=“1”> This operation is valid for Redis only.

</note>

Users or groups that have permissions to use the ‘CopySnapshot` operation can create their own Amazon S3 buckets and copy snapshots to it. To control access to your snapshots, use an IAM policy to control who has the ability to use the `CopySnapshot` operation. For more information about using IAM to control the use of ElastiCache operations, see [Exporting Snapshots] and [Authentication &amp; Access Control].

You could receive the following error messages.

**Error Messages**

  • **Error Message:** The S3 bucket %s is outside of the region.

    Solution: Create an Amazon S3 bucket in the same region as your snapshot. For more information, see [Step 1: Create an Amazon S3 Bucket] in the ElastiCache User Guide.

  • **Error Message:** The S3 bucket %s does not exist.

    Solution: Create an Amazon S3 bucket in the same region as your snapshot. For more information, see [Step 1: Create an Amazon S3 Bucket] in the ElastiCache User Guide.

  • **Error Message:** The S3 bucket %s is not owned by the authenticated user.

    Solution: Create an Amazon S3 bucket in the same region as your snapshot. For more information, see [Step 1: Create an Amazon S3 Bucket] in the ElastiCache User Guide.

  • **Error Message:** The authenticated user does not have sufficient permissions to perform the desired activity.

    Solution: Contact your system administrator to get the needed permissions.

  • **Error Message:** The S3 bucket %s already contains an object with key %s.

    Solution: Give the ‘TargetSnapshotName` a new and unique value. If exporting a snapshot, you could alternatively create a new Amazon S3 bucket and use this same value for `TargetSnapshotName`.

  • Error Message: ElastiCache has not been granted READ permissions %s on the S3 Bucket.

    Solution: Add List and Read permissions on the bucket. For more information, see [Step 2: Grant ElastiCache Access to Your Amazon S3 Bucket] in the ElastiCache User Guide.

  • Error Message: ElastiCache has not been granted WRITE permissions %s on the S3 Bucket.

    Solution: Add Upload/Delete permissions on the bucket. For more information, see [Step 2: Grant ElastiCache Access to Your Amazon S3 Bucket] in the ElastiCache User Guide.

  • Error Message: ElastiCache has not been granted READ_ACP permissions %s on the S3 Bucket.

    Solution: Add View Permissions on the bucket. For more information, see [Step 2: Grant ElastiCache Access to Your Amazon S3 Bucket] in the ElastiCache User Guide.

[1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Snapshots.Exporting.html [2]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/IAM.html [3]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Snapshots.Exporting.html#Snapshots.Exporting.CreateBucket [4]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Snapshots.Exporting.html#Snapshots.Exporting.GrantAccess

Examples:

Example: CopySnapshot


# Copies a snapshot to a specified name.

resp = client.copy_snapshot({
  source_snapshot_name: "my-snapshot", 
  target_bucket: "", 
  target_snapshot_name: "my-snapshot-copy", 
})

resp.to_h outputs the following:
{
  snapshot: {
    auto_minor_version_upgrade: true, 
    cache_cluster_create_time: Time.parse("2016-12-21T22:24:04.955Z"), 
    cache_cluster_id: "my-redis4", 
    cache_node_type: "cache.m3.large", 
    cache_parameter_group_name: "default.redis3.2", 
    cache_subnet_group_name: "default", 
    engine: "redis", 
    engine_version: "3.2.4", 
    node_snapshots: [
      {
        cache_node_create_time: Time.parse("2016-12-21T22:24:04.955Z"), 
        cache_node_id: "0001", 
        cache_size: "3 MB", 
        snapshot_create_time: Time.parse("2016-12-28T07:00:52Z"), 
      }, 
    ], 
    num_cache_nodes: 1, 
    port: 6379, 
    preferred_availability_zone: "us-east-1c", 
    preferred_maintenance_window: "tue:09:30-tue:10:30", 
    snapshot_name: "my-snapshot-copy", 
    snapshot_retention_limit: 7, 
    snapshot_source: "manual", 
    snapshot_status: "creating", 
    snapshot_window: "07:00-08:00", 
    vpc_id: "vpc-3820329f3", 
  }, 
}

Request syntax with placeholder values


resp = client.copy_snapshot({
  source_snapshot_name: "String", # required
  target_snapshot_name: "String", # required
  target_bucket: "String",
})

Response structure


resp.snapshot.snapshot_name #=> String
resp.snapshot.replication_group_id #=> String
resp.snapshot.replication_group_description #=> String
resp.snapshot.cache_cluster_id #=> String
resp.snapshot.snapshot_status #=> String
resp.snapshot.snapshot_source #=> String
resp.snapshot.cache_node_type #=> String
resp.snapshot.engine #=> String
resp.snapshot.engine_version #=> String
resp.snapshot.num_cache_nodes #=> Integer
resp.snapshot.preferred_availability_zone #=> String
resp.snapshot.cache_cluster_create_time #=> Time
resp.snapshot.preferred_maintenance_window #=> String
resp.snapshot.topic_arn #=> String
resp.snapshot.port #=> Integer
resp.snapshot.cache_parameter_group_name #=> String
resp.snapshot.cache_subnet_group_name #=> String
resp.snapshot.vpc_id #=> String
resp.snapshot.auto_minor_version_upgrade #=> Boolean
resp.snapshot.snapshot_retention_limit #=> Integer
resp.snapshot.snapshot_window #=> String
resp.snapshot.num_node_groups #=> Integer
resp.snapshot.automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.snapshot.node_snapshots #=> Array
resp.snapshot.node_snapshots[0].cache_cluster_id #=> String
resp.snapshot.node_snapshots[0].node_group_id #=> String
resp.snapshot.node_snapshots[0].cache_node_id #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.node_group_id #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.slots #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.replica_count #=> Integer
resp.snapshot.node_snapshots[0].node_group_configuration.primary_availability_zone #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.replica_availability_zones #=> Array
resp.snapshot.node_snapshots[0].node_group_configuration.replica_availability_zones[0] #=> String
resp.snapshot.node_snapshots[0].cache_size #=> String
resp.snapshot.node_snapshots[0].cache_node_create_time #=> Time
resp.snapshot.node_snapshots[0].snapshot_create_time #=> Time

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :source_snapshot_name (required, String) —

    The name of an existing snapshot from which to make a copy.

  • :target_snapshot_name (required, String) —

    A name for the snapshot copy. ElastiCache does not permit overwriting a snapshot, therefore this name must be unique within its context - ElastiCache or an Amazon S3 bucket if exporting.

  • :target_bucket (String) —

    The Amazon S3 bucket to which the snapshot is exported. This parameter is used only when exporting a snapshot for external access.

    When using this parameter to export a snapshot, be sure Amazon ElastiCache has the needed permissions to this S3 bucket. For more information, see [Step 2: Grant ElastiCache Access to Your Amazon S3 Bucket] in the *Amazon ElastiCache User Guide*.

    For more information, see [Exporting a Snapshot] in the *Amazon ElastiCache User Guide*.

    [1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Snapshots.Exporting.html#Snapshots.Exporting.GrantAccess [2]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Snapshots.Exporting.html

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 572

def copy_snapshot(params = {}, options = {})
  req = build_request(:copy_snapshot, params)
  req.send_request(options)
end

#create_cache_cluster(params = {}) ⇒ Types::CreateCacheClusterResult

Creates a cluster. All nodes in the cluster run the same protocol-compliant cache engine software, either Memcached or Redis.

This operation is not supported for Redis (cluster mode enabled) clusters.

Examples:

Example: CreateCacheCluster


# Creates a Memcached cluster with 2 nodes. 

resp = client.create_cache_cluster({
  az_mode: "cross-az", 
  cache_cluster_id: "my-memcached-cluster", 
  cache_node_type: "cache.r3.large", 
  cache_subnet_group_name: "default", 
  engine: "memcached", 
  engine_version: "1.4.24", 
  num_cache_nodes: 2, 
  port: 11211, 
})

resp.to_h outputs the following:
{
  cache_cluster: {
    auto_minor_version_upgrade: true, 
    cache_cluster_id: "my-memcached-cluster", 
    cache_cluster_status: "creating", 
    cache_node_type: "cache.r3.large", 
    cache_parameter_group: {
      cache_node_ids_to_reboot: [
      ], 
      cache_parameter_group_name: "default.memcached1.4", 
      parameter_apply_status: "in-sync", 
    }, 
    cache_security_groups: [
    ], 
    cache_subnet_group_name: "default", 
    client_download_landing_page: "https://console.aws.amazon.com/elasticache/home#client-download:", 
    engine: "memcached", 
    engine_version: "1.4.24", 
    num_cache_nodes: 2, 
    pending_modified_values: {
    }, 
    preferred_availability_zone: "Multiple", 
    preferred_maintenance_window: "wed:09:00-wed:10:00", 
  }, 
}

Example: CreateCacheCluster


# Creates a Redis cluster with 1 node. 

resp = client.create_cache_cluster({
  auto_minor_version_upgrade: true, 
  cache_cluster_id: "my-redis", 
  cache_node_type: "cache.r3.larage", 
  cache_subnet_group_name: "default", 
  engine: "redis", 
  engine_version: "3.2.4", 
  num_cache_nodes: 1, 
  port: 6379, 
  preferred_availability_zone: "us-east-1c", 
  snapshot_retention_limit: 7, 
})

resp.to_h outputs the following:
{
  cache_cluster: {
    auto_minor_version_upgrade: true, 
    cache_cluster_id: "my-redis", 
    cache_cluster_status: "creating", 
    cache_node_type: "cache.m3.large", 
    cache_parameter_group: {
      cache_node_ids_to_reboot: [
      ], 
      cache_parameter_group_name: "default.redis3.2", 
      parameter_apply_status: "in-sync", 
    }, 
    cache_security_groups: [
    ], 
    cache_subnet_group_name: "default", 
    client_download_landing_page: "https: //console.aws.amazon.com/elasticache/home#client-download: ", 
    engine: "redis", 
    engine_version: "3.2.4", 
    num_cache_nodes: 1, 
    pending_modified_values: {
    }, 
    preferred_availability_zone: "us-east-1c", 
    preferred_maintenance_window: "fri: 05: 30-fri: 06: 30", 
    snapshot_retention_limit: 7, 
    snapshot_window: "10: 00-11: 00", 
  }, 
}

Request syntax with placeholder values


resp = client.create_cache_cluster({
  cache_cluster_id: "String", # required
  replication_group_id: "String",
  az_mode: "single-az", # accepts single-az, cross-az
  preferred_availability_zone: "String",
  preferred_availability_zones: ["String"],
  num_cache_nodes: 1,
  cache_node_type: "String",
  engine: "String",
  engine_version: "String",
  cache_parameter_group_name: "String",
  cache_subnet_group_name: "String",
  cache_security_group_names: ["String"],
  security_group_ids: ["String"],
  tags: [
    {
      key: "String",
      value: "String",
    },
  ],
  snapshot_arns: ["String"],
  snapshot_name: "String",
  preferred_maintenance_window: "String",
  port: 1,
  notification_topic_arn: "String",
  auto_minor_version_upgrade: false,
  snapshot_retention_limit: 1,
  snapshot_window: "String",
  auth_token: "String",
})

Response structure


resp.cache_cluster.cache_cluster_id #=> String
resp.cache_cluster.configuration_endpoint.address #=> String
resp.cache_cluster.configuration_endpoint.port #=> Integer
resp.cache_cluster.client_download_landing_page #=> String
resp.cache_cluster.cache_node_type #=> String
resp.cache_cluster.engine #=> String
resp.cache_cluster.engine_version #=> String
resp.cache_cluster.cache_cluster_status #=> String
resp.cache_cluster.num_cache_nodes #=> Integer
resp.cache_cluster.preferred_availability_zone #=> String
resp.cache_cluster.cache_cluster_create_time #=> Time
resp.cache_cluster.preferred_maintenance_window #=> String
resp.cache_cluster.pending_modified_values.num_cache_nodes #=> Integer
resp.cache_cluster.pending_modified_values.cache_node_ids_to_remove #=> Array
resp.cache_cluster.pending_modified_values.cache_node_ids_to_remove[0] #=> String
resp.cache_cluster.pending_modified_values.engine_version #=> String
resp.cache_cluster.pending_modified_values.cache_node_type #=> String
resp.cache_cluster.notification_configuration.topic_arn #=> String
resp.cache_cluster.notification_configuration.topic_status #=> String
resp.cache_cluster.cache_security_groups #=> Array
resp.cache_cluster.cache_security_groups[0].cache_security_group_name #=> String
resp.cache_cluster.cache_security_groups[0].status #=> String
resp.cache_cluster.cache_parameter_group.cache_parameter_group_name #=> String
resp.cache_cluster.cache_parameter_group.parameter_apply_status #=> String
resp.cache_cluster.cache_parameter_group.cache_node_ids_to_reboot #=> Array
resp.cache_cluster.cache_parameter_group.cache_node_ids_to_reboot[0] #=> String
resp.cache_cluster.cache_subnet_group_name #=> String
resp.cache_cluster.cache_nodes #=> Array
resp.cache_cluster.cache_nodes[0].cache_node_id #=> String
resp.cache_cluster.cache_nodes[0].cache_node_status #=> String
resp.cache_cluster.cache_nodes[0].cache_node_create_time #=> Time
resp.cache_cluster.cache_nodes[0].endpoint.address #=> String
resp.cache_cluster.cache_nodes[0].endpoint.port #=> Integer
resp.cache_cluster.cache_nodes[0].parameter_group_status #=> String
resp.cache_cluster.cache_nodes[0].source_cache_node_id #=> String
resp.cache_cluster.cache_nodes[0].customer_availability_zone #=> String
resp.cache_cluster.auto_minor_version_upgrade #=> Boolean
resp.cache_cluster.security_groups #=> Array
resp.cache_cluster.security_groups[0].security_group_id #=> String
resp.cache_cluster.security_groups[0].status #=> String
resp.cache_cluster.replication_group_id #=> String
resp.cache_cluster.snapshot_retention_limit #=> Integer
resp.cache_cluster.snapshot_window #=> String
resp.cache_cluster.auth_token_enabled #=> Boolean
resp.cache_cluster.transit_encryption_enabled #=> Boolean
resp.cache_cluster.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_cluster_id (required, String) —

    The node group (shard) identifier. This parameter is stored as a lowercase string.

    Constraints:

    • A name must contain from 1 to 20 alphanumeric characters or hyphens.

    • The first character must be a letter.

    • A name cannot end with a hyphen or contain two consecutive hyphens.

  • :replication_group_id (String) —

    The ID of the replication group to which this cluster should belong. If this parameter is specified, the cluster is added to the specified replication group as a read replica; otherwise, the cluster is a standalone primary that is not part of any replication group.

    If the specified replication group is Multi-AZ enabled and the Availability Zone is not specified, the cluster is created in Availability Zones that provide the best spread of read replicas across Availability Zones.

    <note markdown=“1”> This parameter is only valid if the ‘Engine` parameter is `redis`.

    </note>
  • :az_mode (String) —

    Specifies whether the nodes in this Memcached cluster are created in a single Availability Zone or created across multiple Availability Zones in the cluster’s region.

    This parameter is only supported for Memcached clusters.

    If the ‘AZMode` and `PreferredAvailabilityZones` are not specified, ElastiCache assumes `single-az` mode.

  • :preferred_availability_zone (String) —

    The EC2 Availability Zone in which the cluster is created.

    All nodes belonging to this Memcached cluster are placed in the preferred Availability Zone. If you want to create your nodes across multiple Availability Zones, use ‘PreferredAvailabilityZones`.

    Default: System chosen Availability Zone.

  • :preferred_availability_zones (Array<String>) —

    A list of the Availability Zones in which cache nodes are created. The order of the zones in the list is not important.

    This option is only supported on Memcached.

    <note markdown=“1”> If you are creating your cluster in an Amazon VPC (recommended) you can only locate nodes in Availability Zones that are associated with the subnets in the selected subnet group.

    The number of Availability Zones listed must equal the value of

    ‘NumCacheNodes`.

    </note>

    If you want all the nodes in the same Availability Zone, use ‘PreferredAvailabilityZone` instead, or repeat the Availability Zone multiple times in the list.

    Default: System chosen Availability Zones.

  • :num_cache_nodes (Integer) —

    The initial number of cache nodes that the cluster has.

    For clusters running Redis, this value must be 1. For clusters running Memcached, this value must be between 1 and 20.

    If you need more than 20 nodes for your Memcached cluster, please fill out the ElastiCache Limit Increase Request form at [aws.amazon.com/contact-us/elasticache-node-limit-request/][1].

    [1]: aws.amazon.com/contact-us/elasticache-node-limit-request/

  • :cache_node_type (String) —

    The compute and memory capacity of the nodes in the node group (shard).

    The following node types are supported by ElastiCache. Generally speaking, the current generation types provide more memory and computational power at lower cost when compared to their equivalent previous generation counterparts.

    • General purpose:

      • Current generation:

        **T2 node types:** ‘cache.t2.micro`, `cache.t2.small`, `cache.t2.medium`

        **M3 node types:** ‘cache.m3.medium`, `cache.m3.large`, `cache.m3.xlarge`, `cache.m3.2xlarge`

        **M4 node types:** ‘cache.m4.large`, `cache.m4.xlarge`, `cache.m4.2xlarge`, `cache.m4.4xlarge`, `cache.m4.10xlarge`

      • Previous generation: (not recommended)

        **T1 node types:** ‘cache.t1.micro`

        **M1 node types:** ‘cache.m1.small`, `cache.m1.medium`, `cache.m1.large`, `cache.m1.xlarge`

    • Compute optimized:

      • Previous generation: (not recommended)

        **C1 node types:** ‘cache.c1.xlarge`

    • Memory optimized:

      • Current generation:

        **R3 node types:** ‘cache.r3.large`, `cache.r3.xlarge`, `cache.r3.2xlarge`, `cache.r3.4xlarge`, `cache.r3.8xlarge`

        **R4 node types;** ‘cache.r4.large`, `cache.r4.xlarge`, `cache.r4.2xlarge`, `cache.r4.4xlarge`, `cache.r4.8xlarge`, `cache.r4.16xlarge`

      • Previous generation: (not recommended)

        **M2 node types:** ‘cache.m2.xlarge`, `cache.m2.2xlarge`, `cache.m2.4xlarge`

    Notes:

    • All T2 instances are created in an Amazon Virtual Private Cloud (Amazon VPC).

    • Redis (cluster mode disabled): Redis backup/restore is not supported on T1 and T2 instances.

    • Redis (cluster mode enabled): Backup/restore is not supported on T1 instances.

    • Redis Append-only files (AOF) functionality is not supported for T1 or T2 instances.

    For a complete listing of node types and specifications, see:

    • Amazon ElastiCache Product Features and Details][1
    • Cache Node Type-Specific Parameters for Memcached][2
    • Cache Node Type-Specific Parameters for Redis][3

    [1]: aws.amazon.com/elasticache/details [2]: docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/ParameterGroups.Memcached.html#ParameterGroups.Memcached.NodeSpecific [3]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/ParameterGroups.Redis.html#ParameterGroups.Redis.NodeSpecific

  • :engine (String) —

    The name of the cache engine to be used for this cluster.

    Valid values for this parameter are: ‘memcached` | `redis`

  • :engine_version (String) —

    The version number of the cache engine to be used for this cluster. To view the supported cache engine versions, use the DescribeCacheEngineVersions operation.

    Important: You can upgrade to a newer engine version (see [Selecting a Cache Engine and Version]), but you cannot downgrade to an earlier engine version. If you want to use an earlier engine version, you must delete the existing cluster or replication group and create it anew with the earlier engine version.

    [1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/SelectEngine.html#VersionManagement

  • :cache_parameter_group_name (String) —

    The name of the parameter group to associate with this cluster. If this argument is omitted, the default parameter group for the specified engine is used. You cannot use any parameter group which has ‘cluster-enabled=’yes’‘ when creating a cluster.

  • :cache_subnet_group_name (String) —

    The name of the subnet group to be used for the cluster.

    Use this parameter only when you are creating a cluster in an Amazon Virtual Private Cloud (Amazon VPC).

    If you’re going to launch your cluster in an Amazon VPC, you need to create a subnet group before you start creating a cluster. For more information, see [Subnets and Subnet Groups].

    [1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/SubnetGroups.html

  • :cache_security_group_names (Array<String>) —

    A list of security group names to associate with this cluster.

    Use this parameter only when you are creating a cluster outside of an Amazon Virtual Private Cloud (Amazon VPC).

  • :security_group_ids (Array<String>) —

    One or more VPC security groups associated with the cluster.

    Use this parameter only when you are creating a cluster in an Amazon Virtual Private Cloud (Amazon VPC).

  • :tags (Array<Types::Tag>) —

    A list of cost allocation tags to be added to this resource.

  • :snapshot_arns (Array<String>) —

    A single-element string list containing an Amazon Resource Name (ARN) that uniquely identifies a Redis RDB snapshot file stored in Amazon S3. The snapshot file is used to populate the node group (shard). The Amazon S3 object name in the ARN cannot contain any commas.

    <note markdown=“1”> This parameter is only valid if the ‘Engine` parameter is `redis`.

    </note>

    Example of an Amazon S3 ARN: ‘arn:aws:s3:::my_bucket/snapshot1.rdb`

  • :snapshot_name (String) —

    The name of a Redis snapshot from which to restore data into the new node group (shard). The snapshot status changes to ‘restoring` while the new node group (shard) is being created.

    <note markdown=“1”> This parameter is only valid if the ‘Engine` parameter is `redis`.

    </note>
  • :preferred_maintenance_window (String) —

    Specifies the weekly time range during which maintenance on the cluster is performed. It is specified as a range in the format ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC). The minimum maintenance window is a 60 minute period. Valid values for ‘ddd` are:

    Specifies the weekly time range during which maintenance on the cluster is performed. It is specified as a range in the format ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC). The minimum maintenance window is a 60 minute period.

    Valid values for ‘ddd` are:

    • ‘sun`

    • ‘mon`

    • ‘tue`

    • ‘wed`

    • ‘thu`

    • ‘fri`

    • ‘sat`

    Example: ‘sun:23:00-mon:01:30`

  • :port (Integer) —

    The port number on which each of the cache nodes accepts connections.

  • :notification_topic_arn (String) —

    The Amazon Resource Name (ARN) of the Amazon Simple Notification Service (SNS) topic to which notifications are sent.

    <note markdown=“1”> The Amazon SNS topic owner must be the same as the cluster owner.

    </note>
  • :auto_minor_version_upgrade (Boolean) —

    This parameter is currently disabled.

  • :snapshot_retention_limit (Integer) —

    The number of days for which ElastiCache retains automatic snapshots before deleting them. For example, if you set ‘SnapshotRetentionLimit` to 5, a snapshot taken today is retained for 5 days before being deleted.

    <note markdown=“1”> This parameter is only valid if the ‘Engine` parameter is `redis`.

    </note>

    Default: 0 (i.e., automatic backups are disabled for this cache cluster).

  • :snapshot_window (String) —

    The daily time range (in UTC) during which ElastiCache begins taking a daily snapshot of your node group (shard).

    Example: ‘05:00-09:00`

    If you do not specify this parameter, ElastiCache automatically chooses an appropriate time range.

    <note markdown=“1”> This parameter is only valid if the ‘Engine` parameter is `redis`.

    </note>
  • :auth_token (String) —

    **Reserved parameter.** The password used to access a password protected server.

    Password constraints:

    • Must be only printable ASCII characters.

    • Must be at least 16 characters and no more than 128 characters in length.

    • Cannot contain any of the following characters: ‘/’, ‘“’, or ‘@’.

    For more information, see [AUTH password] at redis.io/commands/AUTH.

    [1]: redis.io/commands/AUTH

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 1088

def create_cache_cluster(params = {}, options = {})
  req = build_request(:create_cache_cluster, params)
  req.send_request(options)
end

#create_cache_parameter_group(params = {}) ⇒ Types::CreateCacheParameterGroupResult

Creates a new Amazon ElastiCache cache parameter group. An ElastiCache cache parameter group is a collection of parameters and their values that are applied to all of the nodes in any cluster or replication group using the CacheParameterGroup.

A newly created CacheParameterGroup is an exact duplicate of the default parameter group for the CacheParameterGroupFamily. To customize the newly created CacheParameterGroup you can change the values of specific parameters. For more information, see:

  • ModifyCacheParameterGroup][1

    in the ElastiCache API Reference.

  • Parameters and Parameter Groups][2

    in the ElastiCache User Guide.

[1]: docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_ModifyCacheParameterGroup.html [2]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/ParameterGroups.html

Examples:

Example: CreateCacheParameterGroup


# Creates the Amazon ElastiCache parameter group custom-redis2-8.

resp = client.create_cache_parameter_group({
  cache_parameter_group_family: "redis2.8", 
  cache_parameter_group_name: "custom-redis2-8", 
  description: "Custom Redis 2.8 parameter group.", 
})

resp.to_h outputs the following:
{
  cache_parameter_group: {
    cache_parameter_group_family: "redis2.8", 
    cache_parameter_group_name: "custom-redis2-8", 
    description: "Custom Redis 2.8 parameter group.", 
  }, 
}

Request syntax with placeholder values


resp = client.create_cache_parameter_group({
  cache_parameter_group_name: "String", # required
  cache_parameter_group_family: "String", # required
  description: "String", # required
})

Response structure


resp.cache_parameter_group.cache_parameter_group_name #=> String
resp.cache_parameter_group.cache_parameter_group_family #=> String
resp.cache_parameter_group.description #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_parameter_group_name (required, String) —

    A user-specified name for the cache parameter group.

  • :cache_parameter_group_family (required, String) —

    The name of the cache parameter group family that the cache parameter group can be used with.

    Valid values are: ‘memcached1.4` | `redis2.6` | `redis2.8` | `redis3.2` | `redis4.0`

  • :description (required, String) —

    A user-specified description for the cache parameter group.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 1167

def create_cache_parameter_group(params = {}, options = {})
  req = build_request(:create_cache_parameter_group, params)
  req.send_request(options)
end

#create_cache_security_group(params = {}) ⇒ Types::CreateCacheSecurityGroupResult

Creates a new cache security group. Use a cache security group to control access to one or more clusters.

Cache security groups are only used when you are creating a cluster outside of an Amazon Virtual Private Cloud (Amazon VPC). If you are creating a cluster inside of a VPC, use a cache subnet group instead. For more information, see [CreateCacheSubnetGroup].

[1]: docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_CreateCacheSubnetGroup.html

Examples:

Example: CreateCacheSecurityGroup


# Creates an ElastiCache security group. ElastiCache security groups are only for clusters not running in an AWS VPC.

resp = client.create_cache_security_group({
  cache_security_group_name: "my-cache-sec-grp", 
  description: "Example ElastiCache security group.", 
})

Request syntax with placeholder values


resp = client.create_cache_security_group({
  cache_security_group_name: "String", # required
  description: "String", # required
})

Response structure


resp.cache_security_group.owner_id #=> String
resp.cache_security_group.cache_security_group_name #=> String
resp.cache_security_group.description #=> String
resp.cache_security_group.ec2_security_groups #=> Array
resp.cache_security_group.ec2_security_groups[0].status #=> String
resp.cache_security_group.ec2_security_groups[0].ec2_security_group_name #=> String
resp.cache_security_group.ec2_security_groups[0].ec2_security_group_owner_id #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_security_group_name (required, String) —

    A name for the cache security group. This value is stored as a lowercase string.

    Constraints: Must contain no more than 255 alphanumeric characters. Cannot be the word “Default”.

    Example: ‘mysecuritygroup`

  • :description (required, String) —

    A description for the cache security group.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 1231

def create_cache_security_group(params = {}, options = {})
  req = build_request(:create_cache_security_group, params)
  req.send_request(options)
end

#create_cache_subnet_group(params = {}) ⇒ Types::CreateCacheSubnetGroupResult

Creates a new cache subnet group.

Use this parameter only when you are creating a cluster in an Amazon Virtual Private Cloud (Amazon VPC).

Examples:

Example: CreateCacheSubnet


# Creates a new cache subnet group.

resp = client.create_cache_subnet_group({
  cache_subnet_group_description: "Sample subnet group", 
  cache_subnet_group_name: "my-sn-grp2", 
  subnet_ids: [
    "subnet-6f28c982", 
    "subnet-bcd382f3", 
    "subnet-845b3e7c0", 
  ], 
})

resp.to_h outputs the following:
{
  cache_subnet_group: {
    cache_subnet_group_description: "My subnet group.", 
    cache_subnet_group_name: "my-sn-grp", 
    subnets: [
      {
        subnet_availability_zone: {
          name: "us-east-1a", 
        }, 
        subnet_identifier: "subnet-6f28c982", 
      }, 
      {
        subnet_availability_zone: {
          name: "us-east-1c", 
        }, 
        subnet_identifier: "subnet-bcd382f3", 
      }, 
      {
        subnet_availability_zone: {
          name: "us-east-1b", 
        }, 
        subnet_identifier: "subnet-845b3e7c0", 
      }, 
    ], 
    vpc_id: "vpc-91280df6", 
  }, 
}

Request syntax with placeholder values


resp = client.create_cache_subnet_group({
  cache_subnet_group_name: "String", # required
  cache_subnet_group_description: "String", # required
  subnet_ids: ["String"], # required
})

Response structure


resp.cache_subnet_group.cache_subnet_group_name #=> String
resp.cache_subnet_group.cache_subnet_group_description #=> String
resp.cache_subnet_group.vpc_id #=> String
resp.cache_subnet_group.subnets #=> Array
resp.cache_subnet_group.subnets[0].subnet_identifier #=> String
resp.cache_subnet_group.subnets[0].subnet_availability_zone.name #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_subnet_group_name (required, String) —

    A name for the cache subnet group. This value is stored as a lowercase string.

    Constraints: Must contain no more than 255 alphanumeric characters or hyphens.

    Example: ‘mysubnetgroup`

  • :cache_subnet_group_description (required, String) —

    A description for the cache subnet group.

  • :subnet_ids (required, Array<String>) —

    A list of VPC subnet IDs for the cache subnet group.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 1325

def create_cache_subnet_group(params = {}, options = {})
  req = build_request(:create_cache_subnet_group, params)
  req.send_request(options)
end

#create_replication_group(params = {}) ⇒ Types::CreateReplicationGroupResult

Creates a Redis (cluster mode disabled) or a Redis (cluster mode enabled) replication group.

A Redis (cluster mode disabled) replication group is a collection of clusters, where one of the clusters is a read/write primary and the others are read-only replicas. Writes to the primary are asynchronously propagated to the replicas.

A Redis (cluster mode enabled) replication group is a collection of 1 to 15 node groups (shards). Each node group (shard) has one read/write primary node and up to 5 read-only replica nodes. Writes to the primary are asynchronously propagated to the replicas. Redis (cluster mode enabled) replication groups partition the data across node groups (shards).

When a Redis (cluster mode disabled) replication group has been successfully created, you can add one or more read replicas to it, up to a total of 5 read replicas. You cannot alter a Redis (cluster mode enabled) replication group after it has been created. However, if you need to increase or decrease the number of node groups (console: shards), you can avail yourself of ElastiCache for Redis’ enhanced backup and restore. For more information, see [Restoring From a Backup with Cluster Resizing] in the *ElastiCache User Guide*.

<note markdown=“1”> This operation is valid for Redis only.

</note>

[1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/backups-restoring.html

Examples:

Example: CreateCacheReplicationGroup


# Creates a Redis replication group with 3 nodes.

resp = client.create_replication_group({
  automatic_failover_enabled: true, 
  cache_node_type: "cache.m3.medium", 
  engine: "redis", 
  engine_version: "2.8.24", 
  num_cache_clusters: 3, 
  replication_group_description: "A Redis replication group.", 
  replication_group_id: "my-redis-rg", 
  snapshot_retention_limit: 30, 
})

resp.to_h outputs the following:
{
  replication_group: {
    automatic_failover: "enabling", 
    description: "A Redis replication group.", 
    member_clusters: [
      "my-redis-rg-001", 
      "my-redis-rg-002", 
      "my-redis-rg-003", 
    ], 
    pending_modified_values: {
    }, 
    replication_group_id: "my-redis-rg", 
    snapshotting_cluster_id: "my-redis-rg-002", 
    status: "creating", 
  }, 
}

Example: CreateReplicationGroup


# Creates a Redis (cluster mode enabled) replication group with two shards. One shard has one read replica node and the
# other shard has two read replicas.

resp = client.create_replication_group({
  auto_minor_version_upgrade: true, 
  cache_node_type: "cache.m3.medium", 
  cache_parameter_group_name: "default.redis3.2.cluster.on", 
  engine: "redis", 
  engine_version: "3.2.4", 
  node_group_configuration: [
    {
      primary_availability_zone: "us-east-1c", 
      replica_availability_zones: [
        "us-east-1b", 
      ], 
      replica_count: 1, 
      slots: "0-8999", 
    }, 
    {
      primary_availability_zone: "us-east-1a", 
      replica_availability_zones: [
        "us-east-1a", 
        "us-east-1c", 
      ], 
      replica_count: 2, 
      slots: "9000-16383", 
    }, 
  ], 
  num_node_groups: 2, 
  replication_group_description: "A multi-sharded replication group", 
  replication_group_id: "clustered-redis-rg", 
  snapshot_retention_limit: 8, 
})

resp.to_h outputs the following:
{
  replication_group: {
    automatic_failover: "enabled", 
    description: "Sharded replication group", 
    member_clusters: [
      "rc-rg3-0001-001", 
      "rc-rg3-0001-002", 
      "rc-rg3-0002-001", 
      "rc-rg3-0002-002", 
      "rc-rg3-0002-003", 
    ], 
    pending_modified_values: {
    }, 
    replication_group_id: "clustered-redis-rg", 
    snapshot_retention_limit: 8, 
    snapshot_window: "05:30-06:30", 
    status: "creating", 
  }, 
}

Request syntax with placeholder values


resp = client.create_replication_group({
  replication_group_id: "String", # required
  replication_group_description: "String", # required
  primary_cluster_id: "String",
  automatic_failover_enabled: false,
  num_cache_clusters: 1,
  preferred_cache_cluster_a_zs: ["String"],
  num_node_groups: 1,
  replicas_per_node_group: 1,
  node_group_configuration: [
    {
      node_group_id: "AllowedNodeGroupId",
      slots: "String",
      replica_count: 1,
      primary_availability_zone: "String",
      replica_availability_zones: ["String"],
    },
  ],
  cache_node_type: "String",
  engine: "String",
  engine_version: "String",
  cache_parameter_group_name: "String",
  cache_subnet_group_name: "String",
  cache_security_group_names: ["String"],
  security_group_ids: ["String"],
  tags: [
    {
      key: "String",
      value: "String",
    },
  ],
  snapshot_arns: ["String"],
  snapshot_name: "String",
  preferred_maintenance_window: "String",
  port: 1,
  notification_topic_arn: "String",
  auto_minor_version_upgrade: false,
  snapshot_retention_limit: 1,
  snapshot_window: "String",
  auth_token: "String",
  transit_encryption_enabled: false,
  at_rest_encryption_enabled: false,
})

Response structure


resp.replication_group.replication_group_id #=> String
resp.replication_group.description #=> String
resp.replication_group.status #=> String
resp.replication_group.pending_modified_values.primary_cluster_id #=> String
resp.replication_group.pending_modified_values.automatic_failover_status #=> String, one of "enabled", "disabled"
resp.replication_group.pending_modified_values.resharding.slot_migration.progress_percentage #=> Float
resp.replication_group.member_clusters #=> Array
resp.replication_group.member_clusters[0] #=> String
resp.replication_group.node_groups #=> Array
resp.replication_group.node_groups[0].node_group_id #=> String
resp.replication_group.node_groups[0].status #=> String
resp.replication_group.node_groups[0].primary_endpoint.address #=> String
resp.replication_group.node_groups[0].primary_endpoint.port #=> Integer
resp.replication_group.node_groups[0].slots #=> String
resp.replication_group.node_groups[0].node_group_members #=> Array
resp.replication_group.node_groups[0].node_group_members[0].cache_cluster_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].cache_node_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.address #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.port #=> Integer
resp.replication_group.node_groups[0].node_group_members[0].preferred_availability_zone #=> String
resp.replication_group.node_groups[0].node_group_members[0].current_role #=> String
resp.replication_group.snapshotting_cluster_id #=> String
resp.replication_group.automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.replication_group.configuration_endpoint.address #=> String
resp.replication_group.configuration_endpoint.port #=> Integer
resp.replication_group.snapshot_retention_limit #=> Integer
resp.replication_group.snapshot_window #=> String
resp.replication_group.cluster_enabled #=> Boolean
resp.replication_group.cache_node_type #=> String
resp.replication_group.auth_token_enabled #=> Boolean
resp.replication_group.transit_encryption_enabled #=> Boolean
resp.replication_group.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :replication_group_id (required, String) —

    The replication group identifier. This parameter is stored as a lowercase string.

    Constraints:

    • A name must contain from 1 to 20 alphanumeric characters or hyphens.

    • The first character must be a letter.

    • A name cannot end with a hyphen or contain two consecutive hyphens.

  • :replication_group_description (required, String) —

    A user-created description for the replication group.

  • :primary_cluster_id (String) —

    The identifier of the cluster that serves as the primary for this replication group. This cluster must already exist and have a status of ‘available`.

    This parameter is not required if ‘NumCacheClusters`, `NumNodeGroups`, or `ReplicasPerNodeGroup` is specified.

  • :automatic_failover_enabled (Boolean) —

    Specifies whether a read-only replica is automatically promoted to read/write primary if the existing primary fails.

    If ‘true`, Multi-AZ is enabled for this replication group. If `false`, Multi-AZ is disabled for this replication group.

    ‘AutomaticFailoverEnabled` must be enabled for Redis (cluster mode enabled) replication groups.

    Default: false

    Amazon ElastiCache for Redis does not support Multi-AZ with automatic failover on:

    • Redis versions earlier than 2.8.6.

    • Redis (cluster mode disabled): T1 and T2 cache node types.

    • Redis (cluster mode enabled): T1 node types.

  • :num_cache_clusters (Integer) —

    The number of clusters this replication group initially has.

    This parameter is not used if there is more than one node group (shard). You should use ‘ReplicasPerNodeGroup` instead.

    If ‘AutomaticFailoverEnabled` is `true`, the value of this parameter must be at least 2. If `AutomaticFailoverEnabled` is `false` you can omit this parameter (it will default to 1), or you can explicitly set it to a value between 2 and 6.

    The maximum permitted value for ‘NumCacheClusters` is 6 (1 primary plus 5 replicas).

  • :preferred_cache_cluster_a_zs (Array<String>) —

    A list of EC2 Availability Zones in which the replication group’s clusters are created. The order of the Availability Zones in the list is the order in which clusters are allocated. The primary cluster is created in the first AZ in the list.

    This parameter is not used if there is more than one node group (shard). You should use ‘NodeGroupConfiguration` instead.

    <note markdown=“1”> If you are creating your replication group in an Amazon VPC (recommended), you can only locate clusters in Availability Zones associated with the subnets in the selected subnet group.

    The number of Availability Zones listed must equal the value of

    ‘NumCacheClusters`.

    </note>

    Default: system chosen Availability Zones.

  • :num_node_groups (Integer) —

    An optional parameter that specifies the number of node groups (shards) for this Redis (cluster mode enabled) replication group. For Redis (cluster mode disabled) either omit this parameter or set it to 1.

    Default: 1

  • :replicas_per_node_group (Integer) —

    An optional parameter that specifies the number of replica nodes in each node group (shard). Valid values are 0 to 5.

  • :node_group_configuration (Array<Types::NodeGroupConfiguration>) —

    A list of node group (shard) configuration options. Each node group (shard) configuration has the following members: ‘PrimaryAvailabilityZone`, `ReplicaAvailabilityZones`, `ReplicaCount`, and `Slots`.

    If you’re creating a Redis (cluster mode disabled) or a Redis (cluster mode enabled) replication group, you can use this parameter to individually configure each node group (shard), or you can omit this parameter. However, when seeding a Redis (cluster mode enabled) cluster from a S3 rdb file, you must configure each node group (shard) using this parameter because you must specify the slots for each node group.

  • :cache_node_type (String) —

    The compute and memory capacity of the nodes in the node group (shard).

    The following node types are supported by ElastiCache. Generally speaking, the current generation types provide more memory and computational power at lower cost when compared to their equivalent previous generation counterparts.

    • General purpose:

      • Current generation:

        **T2 node types:** ‘cache.t2.micro`, `cache.t2.small`, `cache.t2.medium`

        **M3 node types:** ‘cache.m3.medium`, `cache.m3.large`, `cache.m3.xlarge`, `cache.m3.2xlarge`

        **M4 node types:** ‘cache.m4.large`, `cache.m4.xlarge`, `cache.m4.2xlarge`, `cache.m4.4xlarge`, `cache.m4.10xlarge`

      • Previous generation: (not recommended)

        **T1 node types:** ‘cache.t1.micro`

        **M1 node types:** ‘cache.m1.small`, `cache.m1.medium`, `cache.m1.large`, `cache.m1.xlarge`

    • Compute optimized:

      • Previous generation: (not recommended)

        **C1 node types:** ‘cache.c1.xlarge`

    • Memory optimized:

      • Current generation:

        **R3 node types:** ‘cache.r3.large`, `cache.r3.xlarge`, `cache.r3.2xlarge`, `cache.r3.4xlarge`, `cache.r3.8xlarge`

        **R4 node types;** ‘cache.r4.large`, `cache.r4.xlarge`, `cache.r4.2xlarge`, `cache.r4.4xlarge`, `cache.r4.8xlarge`, `cache.r4.16xlarge`

      • Previous generation: (not recommended)

        **M2 node types:** ‘cache.m2.xlarge`, `cache.m2.2xlarge`, `cache.m2.4xlarge`

    Notes:

    • All T2 instances are created in an Amazon Virtual Private Cloud (Amazon VPC).

    • Redis (cluster mode disabled): Redis backup/restore is not supported on T1 and T2 instances.

    • Redis (cluster mode enabled): Backup/restore is not supported on T1 instances.

    • Redis Append-only files (AOF) functionality is not supported for T1 or T2 instances.

    For a complete listing of node types and specifications, see:

    • Amazon ElastiCache Product Features and Details][1
    • Cache Node Type-Specific Parameters for Memcached][2
    • Cache Node Type-Specific Parameters for Redis][3

    [1]: aws.amazon.com/elasticache/details [2]: docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/ParameterGroups.Memcached.html#ParameterGroups.Memcached.NodeSpecific [3]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/ParameterGroups.Redis.html#ParameterGroups.Redis.NodeSpecific

  • :engine (String) —

    The name of the cache engine to be used for the clusters in this replication group.

  • :engine_version (String) —

    The version number of the cache engine to be used for the clusters in this replication group. To view the supported cache engine versions, use the ‘DescribeCacheEngineVersions` operation.

    Important: You can upgrade to a newer engine version (see [Selecting a Cache Engine and Version]) in the *ElastiCache User Guide*, but you cannot downgrade to an earlier engine version. If you want to use an earlier engine version, you must delete the existing cluster or replication group and create it anew with the earlier engine version.

    [1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/SelectEngine.html#VersionManagement

  • :cache_parameter_group_name (String) —

    The name of the parameter group to associate with this replication group. If this argument is omitted, the default cache parameter group for the specified engine is used.

    If you are running Redis version 3.2.4 or later, only one node group (shard), and want to use a default parameter group, we recommend that you specify the parameter group by name.

    • To create a Redis (cluster mode disabled) replication group, use ‘CacheParameterGroupName=default.redis3.2`.

    • To create a Redis (cluster mode enabled) replication group, use ‘CacheParameterGroupName=default.redis3.2.cluster.on`.

  • :cache_subnet_group_name (String) —

    The name of the cache subnet group to be used for the replication group.

    If you’re going to launch your cluster in an Amazon VPC, you need to create a subnet group before you start creating a cluster. For more information, see [Subnets and Subnet Groups].

    [1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/SubnetGroups.html

  • :cache_security_group_names (Array<String>) —

    A list of cache security group names to associate with this replication group.

  • :security_group_ids (Array<String>) —

    One or more Amazon VPC security groups associated with this replication group.

    Use this parameter only when you are creating a replication group in an Amazon Virtual Private Cloud (Amazon VPC).

  • :tags (Array<Types::Tag>) —

    A list of cost allocation tags to be added to this resource. A tag is a key-value pair.

  • :snapshot_arns (Array<String>) —

    A list of Amazon Resource Names (ARN) that uniquely identify the Redis RDB snapshot files stored in Amazon S3. The snapshot files are used to populate the new replication group. The Amazon S3 object name in the ARN cannot contain any commas. The new replication group will have the number of node groups (console: shards) specified by the parameter NumNodeGroups or the number of node groups configured by NodeGroupConfiguration regardless of the number of ARNs specified here.

    Example of an Amazon S3 ARN: ‘arn:aws:s3:::my_bucket/snapshot1.rdb`

  • :snapshot_name (String) —

    The name of a snapshot from which to restore data into the new replication group. The snapshot status changes to ‘restoring` while the new replication group is being created.

  • :preferred_maintenance_window (String) —

    Specifies the weekly time range during which maintenance on the cluster is performed. It is specified as a range in the format ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC). The minimum maintenance window is a 60 minute period. Valid values for ‘ddd` are:

    Specifies the weekly time range during which maintenance on the cluster is performed. It is specified as a range in the format ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC). The minimum maintenance window is a 60 minute period.

    Valid values for ‘ddd` are:

    • ‘sun`

    • ‘mon`

    • ‘tue`

    • ‘wed`

    • ‘thu`

    • ‘fri`

    • ‘sat`

    Example: ‘sun:23:00-mon:01:30`

  • :port (Integer) —

    The port number on which each member of the replication group accepts connections.

  • :notification_topic_arn (String) —

    The Amazon Resource Name (ARN) of the Amazon Simple Notification Service (SNS) topic to which notifications are sent.

    <note markdown=“1”> The Amazon SNS topic owner must be the same as the cluster owner.

    </note>
  • :auto_minor_version_upgrade (Boolean) —

    This parameter is currently disabled.

  • :snapshot_retention_limit (Integer) —

    The number of days for which ElastiCache retains automatic snapshots before deleting them. For example, if you set ‘SnapshotRetentionLimit` to 5, a snapshot that was taken today is retained for 5 days before being deleted.

    Default: 0 (i.e., automatic backups are disabled for this cluster).

  • :snapshot_window (String) —

    The daily time range (in UTC) during which ElastiCache begins taking a daily snapshot of your node group (shard).

    Example: ‘05:00-09:00`

    If you do not specify this parameter, ElastiCache automatically chooses an appropriate time range.

  • :auth_token (String) —

    **Reserved parameter.** The password used to access a password protected server.

    ‘AuthToken` can be specified only on replication groups where `TransitEncryptionEnabled` is `true`.

    For HIPAA compliance, you must specify ‘TransitEncryptionEnabled` as `true`, an `AuthToken`, and a `CacheSubnetGroup`.

    Password constraints:

    • Must be only printable ASCII characters.

    • Must be at least 16 characters and no more than 128 characters in length.

    • Cannot contain any of the following characters: ‘/’, ‘“’, or ‘@’.

    For more information, see [AUTH password] at redis.io/commands/AUTH.

    [1]: redis.io/commands/AUTH

  • :transit_encryption_enabled (Boolean) —

    A flag that enables in-transit encryption when set to ‘true`.

    You cannot modify the value of ‘TransitEncryptionEnabled` after the cluster is created. To enable in-transit encryption on a cluster you must set `TransitEncryptionEnabled` to `true` when you create a cluster.

    This parameter is valid only if the ‘Engine` parameter is `redis`, the `EngineVersion` parameter is `3.2.6` or `4.x`, and the cluster is being created in an Amazon VPC.

    If you enable in-transit encryption, you must also specify a value for ‘CacheSubnetGroup`.

    Required: Only available when creating a replication group in an Amazon VPC using redis version ‘3.2.6` or `4.x`.

    Default: ‘false`

    For HIPAA compliance, you must specify ‘TransitEncryptionEnabled` as `true`, an `AuthToken`, and a `CacheSubnetGroup`.

  • :at_rest_encryption_enabled (Boolean) —

    A flag that enables encryption at rest when set to ‘true`.

    You cannot modify the value of ‘AtRestEncryptionEnabled` after the replication group is created. To enable encryption at rest on a replication group you must set `AtRestEncryptionEnabled` to `true` when you create the replication group.

    Required: Only available when creating a replication group in an Amazon VPC using redis version ‘3.2.6` or `4.x`.

    Default: ‘false`

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 1928

def create_replication_group(params = {}, options = {})
  req = build_request(:create_replication_group, params)
  req.send_request(options)
end

#create_snapshot(params = {}) ⇒ Types::CreateSnapshotResult

Creates a copy of an entire cluster or replication group at a specific moment in time.

<note markdown=“1”> This operation is valid for Redis only.

</note>

Examples:

Example: CreateSnapshot - NonClustered Redis, no read-replicas


# Creates a snapshot of a non-clustered Redis cluster that has only one node.

resp = client.create_snapshot({
  cache_cluster_id: "onenoderedis", 
  snapshot_name: "snapshot-1", 
})

resp.to_h outputs the following:
{
  snapshot: {
    auto_minor_version_upgrade: true, 
    cache_cluster_create_time: Time.parse("2017-02-03T15:43:36.278Z"), 
    cache_cluster_id: "onenoderedis", 
    cache_node_type: "cache.m3.medium", 
    cache_parameter_group_name: "default.redis3.2", 
    cache_subnet_group_name: "default", 
    engine: "redis", 
    engine_version: "3.2.4", 
    node_snapshots: [
      {
        cache_node_create_time: Time.parse("2017-02-03T15:43:36.278Z"), 
        cache_node_id: "0001", 
        cache_size: "", 
      }, 
    ], 
    num_cache_nodes: 1, 
    port: 6379, 
    preferred_availability_zone: "us-west-2c", 
    preferred_maintenance_window: "sat:08:00-sat:09:00", 
    snapshot_name: "snapshot-1", 
    snapshot_retention_limit: 1, 
    snapshot_source: "manual", 
    snapshot_status: "creating", 
    snapshot_window: "00:00-01:00", 
    vpc_id: "vpc-73c3cd17", 
  }, 
}

Example: CreateSnapshot - NonClustered Redis, 2 read-replicas


# Creates a snapshot of a non-clustered Redis cluster that has only three nodes, primary and two read-replicas.
# CacheClusterId must be a specific node in the cluster.

resp = client.create_snapshot({
  cache_cluster_id: "threenoderedis-001", 
  snapshot_name: "snapshot-2", 
})

resp.to_h outputs the following:
{
  snapshot: {
    auto_minor_version_upgrade: true, 
    cache_cluster_create_time: Time.parse("2017-02-03T15:43:36.278Z"), 
    cache_cluster_id: "threenoderedis-001", 
    cache_node_type: "cache.m3.medium", 
    cache_parameter_group_name: "default.redis3.2", 
    cache_subnet_group_name: "default", 
    engine: "redis", 
    engine_version: "3.2.4", 
    node_snapshots: [
      {
        cache_node_create_time: Time.parse("2017-02-03T15:43:36.278Z"), 
        cache_node_id: "0001", 
        cache_size: "", 
      }, 
    ], 
    num_cache_nodes: 1, 
    port: 6379, 
    preferred_availability_zone: "us-west-2c", 
    preferred_maintenance_window: "sat:08:00-sat:09:00", 
    snapshot_name: "snapshot-2", 
    snapshot_retention_limit: 1, 
    snapshot_source: "manual", 
    snapshot_status: "creating", 
    snapshot_window: "00:00-01:00", 
    vpc_id: "vpc-73c3cd17", 
  }, 
}

Example: CreateSnapshot-clustered Redis


# Creates a snapshot of a clustered Redis cluster that has 2 shards, each with a primary and 4 read-replicas.

resp = client.create_snapshot({
  replication_group_id: "clusteredredis", 
  snapshot_name: "snapshot-2x5", 
})

resp.to_h outputs the following:
{
  snapshot: {
    auto_minor_version_upgrade: true, 
    automatic_failover: "enabled", 
    cache_node_type: "cache.m3.medium", 
    cache_parameter_group_name: "default.redis3.2.cluster.on", 
    cache_subnet_group_name: "default", 
    engine: "redis", 
    engine_version: "3.2.4", 
    node_snapshots: [
      {
        cache_size: "", 
        node_group_id: "0001", 
      }, 
      {
        cache_size: "", 
        node_group_id: "0002", 
      }, 
    ], 
    num_node_groups: 2, 
    port: 6379, 
    preferred_maintenance_window: "mon:09:30-mon:10:30", 
    replication_group_description: "Redis cluster with 2 shards.", 
    replication_group_id: "clusteredredis", 
    snapshot_name: "snapshot-2x5", 
    snapshot_retention_limit: 1, 
    snapshot_source: "manual", 
    snapshot_status: "creating", 
    snapshot_window: "12:00-13:00", 
    vpc_id: "vpc-73c3cd17", 
  }, 
}

Request syntax with placeholder values


resp = client.create_snapshot({
  replication_group_id: "String",
  cache_cluster_id: "String",
  snapshot_name: "String", # required
})

Response structure


resp.snapshot.snapshot_name #=> String
resp.snapshot.replication_group_id #=> String
resp.snapshot.replication_group_description #=> String
resp.snapshot.cache_cluster_id #=> String
resp.snapshot.snapshot_status #=> String
resp.snapshot.snapshot_source #=> String
resp.snapshot.cache_node_type #=> String
resp.snapshot.engine #=> String
resp.snapshot.engine_version #=> String
resp.snapshot.num_cache_nodes #=> Integer
resp.snapshot.preferred_availability_zone #=> String
resp.snapshot.cache_cluster_create_time #=> Time
resp.snapshot.preferred_maintenance_window #=> String
resp.snapshot.topic_arn #=> String
resp.snapshot.port #=> Integer
resp.snapshot.cache_parameter_group_name #=> String
resp.snapshot.cache_subnet_group_name #=> String
resp.snapshot.vpc_id #=> String
resp.snapshot.auto_minor_version_upgrade #=> Boolean
resp.snapshot.snapshot_retention_limit #=> Integer
resp.snapshot.snapshot_window #=> String
resp.snapshot.num_node_groups #=> Integer
resp.snapshot.automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.snapshot.node_snapshots #=> Array
resp.snapshot.node_snapshots[0].cache_cluster_id #=> String
resp.snapshot.node_snapshots[0].node_group_id #=> String
resp.snapshot.node_snapshots[0].cache_node_id #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.node_group_id #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.slots #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.replica_count #=> Integer
resp.snapshot.node_snapshots[0].node_group_configuration.primary_availability_zone #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.replica_availability_zones #=> Array
resp.snapshot.node_snapshots[0].node_group_configuration.replica_availability_zones[0] #=> String
resp.snapshot.node_snapshots[0].cache_size #=> String
resp.snapshot.node_snapshots[0].cache_node_create_time #=> Time
resp.snapshot.node_snapshots[0].snapshot_create_time #=> Time

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :replication_group_id (String) —

    The identifier of an existing replication group. The snapshot is created from this replication group.

  • :cache_cluster_id (String) —

    The identifier of an existing cluster. The snapshot is created from this cluster.

  • :snapshot_name (required, String) —

    A name for the snapshot being created.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 2131

def create_snapshot(params = {}, options = {})
  req = build_request(:create_snapshot, params)
  req.send_request(options)
end

#decrease_replica_count(params = {}) ⇒ Types::DecreaseReplicaCountResult

Dynamically decreases the number of replics in a Redis (cluster mode disabled) replication group or the number of replica nodes in one or more node groups (shards) of a Redis (cluster mode enabled) replication group. This operation is performed with no cluster down time.

Examples:

Request syntax with placeholder values


resp = client.decrease_replica_count({
  replication_group_id: "String", # required
  new_replica_count: 1,
  replica_configuration: [
    {
      node_group_id: "AllowedNodeGroupId", # required
      new_replica_count: 1, # required
      preferred_availability_zones: ["String"],
    },
  ],
  replicas_to_remove: ["String"],
  apply_immediately: false, # required
})

Response structure


resp.replication_group.replication_group_id #=> String
resp.replication_group.description #=> String
resp.replication_group.status #=> String
resp.replication_group.pending_modified_values.primary_cluster_id #=> String
resp.replication_group.pending_modified_values.automatic_failover_status #=> String, one of "enabled", "disabled"
resp.replication_group.pending_modified_values.resharding.slot_migration.progress_percentage #=> Float
resp.replication_group.member_clusters #=> Array
resp.replication_group.member_clusters[0] #=> String
resp.replication_group.node_groups #=> Array
resp.replication_group.node_groups[0].node_group_id #=> String
resp.replication_group.node_groups[0].status #=> String
resp.replication_group.node_groups[0].primary_endpoint.address #=> String
resp.replication_group.node_groups[0].primary_endpoint.port #=> Integer
resp.replication_group.node_groups[0].slots #=> String
resp.replication_group.node_groups[0].node_group_members #=> Array
resp.replication_group.node_groups[0].node_group_members[0].cache_cluster_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].cache_node_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.address #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.port #=> Integer
resp.replication_group.node_groups[0].node_group_members[0].preferred_availability_zone #=> String
resp.replication_group.node_groups[0].node_group_members[0].current_role #=> String
resp.replication_group.snapshotting_cluster_id #=> String
resp.replication_group.automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.replication_group.configuration_endpoint.address #=> String
resp.replication_group.configuration_endpoint.port #=> Integer
resp.replication_group.snapshot_retention_limit #=> Integer
resp.replication_group.snapshot_window #=> String
resp.replication_group.cluster_enabled #=> Boolean
resp.replication_group.cache_node_type #=> String
resp.replication_group.auth_token_enabled #=> Boolean
resp.replication_group.transit_encryption_enabled #=> Boolean
resp.replication_group.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :replication_group_id (required, String) —

    The id of the replication group from which you want to remove replica nodes.

  • :new_replica_count (Integer) —

    The number of read replica nodes you want at the completion of this operation. For Redis (cluster mode disabled) replication groups, this is the number of replica nodes in the replication group. For Redis (cluster mode enabled) replication groups, this is the number of replica nodes in each of the replication group’s node groups.

    The minimum number of replicas in a shard or replication group is:

    • Redis (cluster mode disabled)

      • If Multi-AZ with Automatic Failover is enabled: 1

      • If Multi-AZ with Automatic Failover is not enabled: 0

    • Redis (cluster mode enabled): 0 (though you will not be able to failover to a replica if your primary node fails)

  • :replica_configuration (Array<Types::ConfigureShard>) —

    A list of ‘ConfigureShard` objects that can be used to configure each shard in a Redis (cluster mode enabled) replication group. The `ConfigureShard` has three members: `NewReplicaCount`, `NodeGroupId`, and `PreferredAvailabilityZones`.

  • :replicas_to_remove (Array<String>) —

    A list of the node ids to remove from the replication group or node group (shard).

  • :apply_immediately (required, Boolean) —

    If ‘True`, the number of replica nodes is decreased immediately. If `False`, the number of replica nodes is decreased during the next maintenance window.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 2238

def decrease_replica_count(params = {}, options = {})
  req = build_request(:decrease_replica_count, params)
  req.send_request(options)
end

#delete_cache_cluster(params = {}) ⇒ Types::DeleteCacheClusterResult

Deletes a previously provisioned cluster. ‘DeleteCacheCluster` deletes all associated cache nodes, node endpoints and the cluster itself. When you receive a successful response from this operation, Amazon ElastiCache immediately begins deleting the cluster; you cannot cancel or revert this operation.

This operation cannot be used to delete a cluster that is the last read replica of a replication group or node group (shard) that has Multi-AZ mode enabled or a cluster from a Redis (cluster mode enabled) replication group.

This operation is not valid for Redis (cluster mode enabled) clusters.

Examples:

Example: DeleteCacheCluster


# Deletes an Amazon ElastiCache cluster.

resp = client.delete_cache_cluster({
  cache_cluster_id: "my-memcached", 
})

resp.to_h outputs the following:
{
  cache_cluster: {
    auto_minor_version_upgrade: true, 
    cache_cluster_create_time: Time.parse("2016-12-22T16:05:17.314Z"), 
    cache_cluster_id: "my-memcached", 
    cache_cluster_status: "deleting", 
    cache_node_type: "cache.r3.large", 
    cache_parameter_group: {
      cache_node_ids_to_reboot: [
      ], 
      cache_parameter_group_name: "default.memcached1.4", 
      parameter_apply_status: "in-sync", 
    }, 
    cache_security_groups: [
    ], 
    cache_subnet_group_name: "default", 
    client_download_landing_page: "https://console.aws.amazon.com/elasticache/home#client-download:", 
    configuration_endpoint: {
      address: "my-memcached2.ameaqx.cfg.use1.cache.amazonaws.com", 
      port: 11211, 
    }, 
    engine: "memcached", 
    engine_version: "1.4.24", 
    num_cache_nodes: 2, 
    pending_modified_values: {
    }, 
    preferred_availability_zone: "Multiple", 
    preferred_maintenance_window: "tue:07:30-tue:08:30", 
  }, 
}

Request syntax with placeholder values


resp = client.delete_cache_cluster({
  cache_cluster_id: "String", # required
  final_snapshot_identifier: "String",
})

Response structure


resp.cache_cluster.cache_cluster_id #=> String
resp.cache_cluster.configuration_endpoint.address #=> String
resp.cache_cluster.configuration_endpoint.port #=> Integer
resp.cache_cluster.client_download_landing_page #=> String
resp.cache_cluster.cache_node_type #=> String
resp.cache_cluster.engine #=> String
resp.cache_cluster.engine_version #=> String
resp.cache_cluster.cache_cluster_status #=> String
resp.cache_cluster.num_cache_nodes #=> Integer
resp.cache_cluster.preferred_availability_zone #=> String
resp.cache_cluster.cache_cluster_create_time #=> Time
resp.cache_cluster.preferred_maintenance_window #=> String
resp.cache_cluster.pending_modified_values.num_cache_nodes #=> Integer
resp.cache_cluster.pending_modified_values.cache_node_ids_to_remove #=> Array
resp.cache_cluster.pending_modified_values.cache_node_ids_to_remove[0] #=> String
resp.cache_cluster.pending_modified_values.engine_version #=> String
resp.cache_cluster.pending_modified_values.cache_node_type #=> String
resp.cache_cluster.notification_configuration.topic_arn #=> String
resp.cache_cluster.notification_configuration.topic_status #=> String
resp.cache_cluster.cache_security_groups #=> Array
resp.cache_cluster.cache_security_groups[0].cache_security_group_name #=> String
resp.cache_cluster.cache_security_groups[0].status #=> String
resp.cache_cluster.cache_parameter_group.cache_parameter_group_name #=> String
resp.cache_cluster.cache_parameter_group.parameter_apply_status #=> String
resp.cache_cluster.cache_parameter_group.cache_node_ids_to_reboot #=> Array
resp.cache_cluster.cache_parameter_group.cache_node_ids_to_reboot[0] #=> String
resp.cache_cluster.cache_subnet_group_name #=> String
resp.cache_cluster.cache_nodes #=> Array
resp.cache_cluster.cache_nodes[0].cache_node_id #=> String
resp.cache_cluster.cache_nodes[0].cache_node_status #=> String
resp.cache_cluster.cache_nodes[0].cache_node_create_time #=> Time
resp.cache_cluster.cache_nodes[0].endpoint.address #=> String
resp.cache_cluster.cache_nodes[0].endpoint.port #=> Integer
resp.cache_cluster.cache_nodes[0].parameter_group_status #=> String
resp.cache_cluster.cache_nodes[0].source_cache_node_id #=> String
resp.cache_cluster.cache_nodes[0].customer_availability_zone #=> String
resp.cache_cluster.auto_minor_version_upgrade #=> Boolean
resp.cache_cluster.security_groups #=> Array
resp.cache_cluster.security_groups[0].security_group_id #=> String
resp.cache_cluster.security_groups[0].status #=> String
resp.cache_cluster.replication_group_id #=> String
resp.cache_cluster.snapshot_retention_limit #=> Integer
resp.cache_cluster.snapshot_window #=> String
resp.cache_cluster.auth_token_enabled #=> Boolean
resp.cache_cluster.transit_encryption_enabled #=> Boolean
resp.cache_cluster.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_cluster_id (required, String) —

    The cluster identifier for the cluster to be deleted. This parameter is not case sensitive.

  • :final_snapshot_identifier (String) —

    The user-supplied name of a final cluster snapshot. This is the unique name that identifies the snapshot. ElastiCache creates the snapshot, and then deletes the cluster immediately afterward.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 2370

def delete_cache_cluster(params = {}, options = {})
  req = build_request(:delete_cache_cluster, params)
  req.send_request(options)
end

#delete_cache_parameter_group(params = {}) ⇒ Struct

Deletes the specified cache parameter group. You cannot delete a cache parameter group if it is associated with any cache clusters.

Examples:

Example: DeleteCacheParameterGroup


# Deletes the Amazon ElastiCache parameter group custom-mem1-4.

resp = client.delete_cache_parameter_group({
  cache_parameter_group_name: "custom-mem1-4", 
})

Request syntax with placeholder values


resp = client.delete_cache_parameter_group({
  cache_parameter_group_name: "String", # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_parameter_group_name (required, String) —

    The name of the cache parameter group to delete.

    <note markdown=“1”> The specified cache security group must not be associated with any clusters.

    </note>

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 2407

def delete_cache_parameter_group(params = {}, options = {})
  req = build_request(:delete_cache_parameter_group, params)
  req.send_request(options)
end

#delete_cache_security_group(params = {}) ⇒ Struct

Deletes a cache security group.

<note markdown=“1”> You cannot delete a cache security group if it is associated with any clusters.

</note>

Examples:

Example: DeleteCacheSecurityGroup


# Deletes a cache security group.

resp = client.delete_cache_security_group({
  cache_security_group_name: "my-sec-group", 
})

Request syntax with placeholder values


resp = client.delete_cache_security_group({
  cache_security_group_name: "String", # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_security_group_name (required, String) —

    The name of the cache security group to delete.

    <note markdown=“1”> You cannot delete the default security group.

    </note>

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 2447

def delete_cache_security_group(params = {}, options = {})
  req = build_request(:delete_cache_security_group, params)
  req.send_request(options)
end

#delete_cache_subnet_group(params = {}) ⇒ Struct

Deletes a cache subnet group.

<note markdown=“1”> You cannot delete a cache subnet group if it is associated with any clusters.

</note>

Examples:

Example: DeleteCacheSubnetGroup


# Deletes the Amazon ElastiCache subnet group my-subnet-group.

resp = client.delete_cache_subnet_group({
  cache_subnet_group_name: "my-subnet-group", 
})

Request syntax with placeholder values


resp = client.delete_cache_subnet_group({
  cache_subnet_group_name: "String", # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_subnet_group_name (required, String) —

    The name of the cache subnet group to delete.

    Constraints: Must contain no more than 255 alphanumeric characters or hyphens.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 2486

def delete_cache_subnet_group(params = {}, options = {})
  req = build_request(:delete_cache_subnet_group, params)
  req.send_request(options)
end

#delete_replication_group(params = {}) ⇒ Types::DeleteReplicationGroupResult

Deletes an existing replication group. By default, this operation deletes the entire replication group, including the primary/primaries and all of the read replicas. If the replication group has only one primary, you can optionally delete only the read replicas, while retaining the primary by setting ‘RetainPrimaryCluster=true`.

When you receive a successful response from this operation, Amazon ElastiCache immediately begins deleting the selected resources; you cannot cancel or revert this operation.

<note markdown=“1”> This operation is valid for Redis only.

</note>

Examples:

Example: DeleteReplicationGroup


# Deletes the Amazon ElastiCache replication group my-redis-rg.

resp = client.delete_replication_group({
  replication_group_id: "my-redis-rg", 
  retain_primary_cluster: false, 
})

resp.to_h outputs the following:
{
  replication_group: {
    automatic_failover: "disabled", 
    description: "simple redis cluster", 
    pending_modified_values: {
    }, 
    replication_group_id: "my-redis-rg", 
    status: "deleting", 
  }, 
}

Request syntax with placeholder values


resp = client.delete_replication_group({
  replication_group_id: "String", # required
  retain_primary_cluster: false,
  final_snapshot_identifier: "String",
})

Response structure


resp.replication_group.replication_group_id #=> String
resp.replication_group.description #=> String
resp.replication_group.status #=> String
resp.replication_group.pending_modified_values.primary_cluster_id #=> String
resp.replication_group.pending_modified_values.automatic_failover_status #=> String, one of "enabled", "disabled"
resp.replication_group.pending_modified_values.resharding.slot_migration.progress_percentage #=> Float
resp.replication_group.member_clusters #=> Array
resp.replication_group.member_clusters[0] #=> String
resp.replication_group.node_groups #=> Array
resp.replication_group.node_groups[0].node_group_id #=> String
resp.replication_group.node_groups[0].status #=> String
resp.replication_group.node_groups[0].primary_endpoint.address #=> String
resp.replication_group.node_groups[0].primary_endpoint.port #=> Integer
resp.replication_group.node_groups[0].slots #=> String
resp.replication_group.node_groups[0].node_group_members #=> Array
resp.replication_group.node_groups[0].node_group_members[0].cache_cluster_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].cache_node_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.address #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.port #=> Integer
resp.replication_group.node_groups[0].node_group_members[0].preferred_availability_zone #=> String
resp.replication_group.node_groups[0].node_group_members[0].current_role #=> String
resp.replication_group.snapshotting_cluster_id #=> String
resp.replication_group.automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.replication_group.configuration_endpoint.address #=> String
resp.replication_group.configuration_endpoint.port #=> Integer
resp.replication_group.snapshot_retention_limit #=> Integer
resp.replication_group.snapshot_window #=> String
resp.replication_group.cluster_enabled #=> Boolean
resp.replication_group.cache_node_type #=> String
resp.replication_group.auth_token_enabled #=> Boolean
resp.replication_group.transit_encryption_enabled #=> Boolean
resp.replication_group.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :replication_group_id (required, String) —

    The identifier for the cluster to be deleted. This parameter is not case sensitive.

  • :retain_primary_cluster (Boolean) —

    If set to ‘true`, all of the read replicas are deleted, but the primary node is retained.

  • :final_snapshot_identifier (String) —

    The name of a final node group (shard) snapshot. ElastiCache creates the snapshot from the primary node in the cluster, rather than one of the replicas; this is to ensure that it captures the freshest data. After the final snapshot is taken, the replication group is immediately deleted.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 2593

def delete_replication_group(params = {}, options = {})
  req = build_request(:delete_replication_group, params)
  req.send_request(options)
end

#delete_snapshot(params = {}) ⇒ Types::DeleteSnapshotResult

Deletes an existing snapshot. When you receive a successful response from this operation, ElastiCache immediately begins deleting the snapshot; you cannot cancel or revert this operation.

<note markdown=“1”> This operation is valid for Redis only.

</note>

Examples:

Example: DeleteSnapshot


# Deletes the Redis snapshot snapshot-20160822.

resp = client.delete_snapshot({
  snapshot_name: "snapshot-20161212", 
})

resp.to_h outputs the following:
{
  snapshot: {
    auto_minor_version_upgrade: true, 
    cache_cluster_create_time: Time.parse("2016-12-21T22:27:12.543Z"), 
    cache_cluster_id: "my-redis5", 
    cache_node_type: "cache.m3.large", 
    cache_parameter_group_name: "default.redis3.2", 
    cache_subnet_group_name: "default", 
    engine: "redis", 
    engine_version: "3.2.4", 
    node_snapshots: [
      {
        cache_node_create_time: Time.parse("2016-12-21T22:27:12.543Z"), 
        cache_node_id: "0001", 
        cache_size: "3 MB", 
        snapshot_create_time: Time.parse("2016-12-21T22:30:26Z"), 
      }, 
    ], 
    num_cache_nodes: 1, 
    port: 6379, 
    preferred_availability_zone: "us-east-1c", 
    preferred_maintenance_window: "fri:05:30-fri:06:30", 
    snapshot_name: "snapshot-20161212", 
    snapshot_retention_limit: 7, 
    snapshot_source: "manual", 
    snapshot_status: "deleting", 
    snapshot_window: "10:00-11:00", 
    vpc_id: "vpc-91280df6", 
  }, 
}

Request syntax with placeholder values


resp = client.delete_snapshot({
  snapshot_name: "String", # required
})

Response structure


resp.snapshot.snapshot_name #=> String
resp.snapshot.replication_group_id #=> String
resp.snapshot.replication_group_description #=> String
resp.snapshot.cache_cluster_id #=> String
resp.snapshot.snapshot_status #=> String
resp.snapshot.snapshot_source #=> String
resp.snapshot.cache_node_type #=> String
resp.snapshot.engine #=> String
resp.snapshot.engine_version #=> String
resp.snapshot.num_cache_nodes #=> Integer
resp.snapshot.preferred_availability_zone #=> String
resp.snapshot.cache_cluster_create_time #=> Time
resp.snapshot.preferred_maintenance_window #=> String
resp.snapshot.topic_arn #=> String
resp.snapshot.port #=> Integer
resp.snapshot.cache_parameter_group_name #=> String
resp.snapshot.cache_subnet_group_name #=> String
resp.snapshot.vpc_id #=> String
resp.snapshot.auto_minor_version_upgrade #=> Boolean
resp.snapshot.snapshot_retention_limit #=> Integer
resp.snapshot.snapshot_window #=> String
resp.snapshot.num_node_groups #=> Integer
resp.snapshot.automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.snapshot.node_snapshots #=> Array
resp.snapshot.node_snapshots[0].cache_cluster_id #=> String
resp.snapshot.node_snapshots[0].node_group_id #=> String
resp.snapshot.node_snapshots[0].cache_node_id #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.node_group_id #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.slots #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.replica_count #=> Integer
resp.snapshot.node_snapshots[0].node_group_configuration.primary_availability_zone #=> String
resp.snapshot.node_snapshots[0].node_group_configuration.replica_availability_zones #=> Array
resp.snapshot.node_snapshots[0].node_group_configuration.replica_availability_zones[0] #=> String
resp.snapshot.node_snapshots[0].cache_size #=> String
resp.snapshot.node_snapshots[0].cache_node_create_time #=> Time
resp.snapshot.node_snapshots[0].snapshot_create_time #=> Time

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :snapshot_name (required, String) —

    The name of the snapshot to be deleted.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 2703

def delete_snapshot(params = {}, options = {})
  req = build_request(:delete_snapshot, params)
  req.send_request(options)
end

#describe_cache_clusters(params = {}) ⇒ Types::CacheClusterMessage

Returns information about all provisioned clusters if no cluster identifier is specified, or about a specific cache cluster if a cluster identifier is supplied.

By default, abbreviated information about the clusters is returned. You can use the optional ShowCacheNodeInfo flag to retrieve detailed information about the cache nodes associated with the clusters. These details include the DNS address and port for the cache node endpoint.

If the cluster is in the creating state, only cluster-level information is displayed until all of the nodes are successfully provisioned.

If the cluster is in the deleting state, only cluster-level information is displayed.

If cache nodes are currently being added to the cluster, node endpoint information and creation time for the additional nodes are not displayed until they are completely provisioned. When the cluster state is available, the cluster is ready for use.

If cache nodes are currently being removed from the cluster, no endpoint information for the removed nodes is displayed.

Examples:

Example: DescribeCacheClusters


# Lists the details for up to 50 cache clusters.

resp = client.describe_cache_clusters({
  cache_cluster_id: "my-mem-cluster", 
})

resp.to_h outputs the following:
{
  cache_clusters: [
    {
      auto_minor_version_upgrade: true, 
      cache_cluster_create_time: Time.parse("2016-12-21T21:59:43.794Z"), 
      cache_cluster_id: "my-mem-cluster", 
      cache_cluster_status: "available", 
      cache_node_type: "cache.t2.medium", 
      cache_parameter_group: {
        cache_node_ids_to_reboot: [
        ], 
        cache_parameter_group_name: "default.memcached1.4", 
        parameter_apply_status: "in-sync", 
      }, 
      cache_security_groups: [
      ], 
      cache_subnet_group_name: "default", 
      client_download_landing_page: "https://console.aws.amazon.com/elasticache/home#client-download:", 
      configuration_endpoint: {
        address: "my-mem-cluster.abcdef.cfg.use1.cache.amazonaws.com", 
        port: 11211, 
      }, 
      engine: "memcached", 
      engine_version: "1.4.24", 
      num_cache_nodes: 2, 
      pending_modified_values: {
      }, 
      preferred_availability_zone: "Multiple", 
      preferred_maintenance_window: "wed:06:00-wed:07:00", 
    }, 
  ], 
}

Example: DescribeCacheClusters


# Lists the details for the cache cluster my-mem-cluster.

resp = client.describe_cache_clusters({
  cache_cluster_id: "my-mem-cluster", 
  show_cache_node_info: true, 
})

resp.to_h outputs the following:
{
  cache_clusters: [
    {
      auto_minor_version_upgrade: true, 
      cache_cluster_create_time: Time.parse("2016-12-21T21:59:43.794Z"), 
      cache_cluster_id: "my-mem-cluster", 
      cache_cluster_status: "available", 
      cache_node_type: "cache.t2.medium", 
      cache_nodes: [
        {
          cache_node_create_time: Time.parse("2016-12-21T21:59:43.794Z"), 
          cache_node_id: "0001", 
          cache_node_status: "available", 
          customer_availability_zone: "us-east-1b", 
          endpoint: {
            address: "my-mem-cluster.ameaqx.0001.use1.cache.amazonaws.com", 
            port: 11211, 
          }, 
          parameter_group_status: "in-sync", 
        }, 
        {
          cache_node_create_time: Time.parse("2016-12-21T21:59:43.794Z"), 
          cache_node_id: "0002", 
          cache_node_status: "available", 
          customer_availability_zone: "us-east-1a", 
          endpoint: {
            address: "my-mem-cluster.ameaqx.0002.use1.cache.amazonaws.com", 
            port: 11211, 
          }, 
          parameter_group_status: "in-sync", 
        }, 
      ], 
      cache_parameter_group: {
        cache_node_ids_to_reboot: [
        ], 
        cache_parameter_group_name: "default.memcached1.4", 
        parameter_apply_status: "in-sync", 
      }, 
      cache_security_groups: [
      ], 
      cache_subnet_group_name: "default", 
      client_download_landing_page: "https://console.aws.amazon.com/elasticache/home#client-download:", 
      configuration_endpoint: {
        address: "my-mem-cluster.ameaqx.cfg.use1.cache.amazonaws.com", 
        port: 11211, 
      }, 
      engine: "memcached", 
      engine_version: "1.4.24", 
      num_cache_nodes: 2, 
      pending_modified_values: {
      }, 
      preferred_availability_zone: "Multiple", 
      preferred_maintenance_window: "wed:06:00-wed:07:00", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_cache_clusters({
  cache_cluster_id: "String",
  max_records: 1,
  marker: "String",
  show_cache_node_info: false,
  show_cache_clusters_not_in_replication_groups: false,
})

Response structure


resp.marker #=> String
resp.cache_clusters #=> Array
resp.cache_clusters[0].cache_cluster_id #=> String
resp.cache_clusters[0].configuration_endpoint.address #=> String
resp.cache_clusters[0].configuration_endpoint.port #=> Integer
resp.cache_clusters[0].client_download_landing_page #=> String
resp.cache_clusters[0].cache_node_type #=> String
resp.cache_clusters[0].engine #=> String
resp.cache_clusters[0].engine_version #=> String
resp.cache_clusters[0].cache_cluster_status #=> String
resp.cache_clusters[0].num_cache_nodes #=> Integer
resp.cache_clusters[0].preferred_availability_zone #=> String
resp.cache_clusters[0].cache_cluster_create_time #=> Time
resp.cache_clusters[0].preferred_maintenance_window #=> String
resp.cache_clusters[0].pending_modified_values.num_cache_nodes #=> Integer
resp.cache_clusters[0].pending_modified_values.cache_node_ids_to_remove #=> Array
resp.cache_clusters[0].pending_modified_values.cache_node_ids_to_remove[0] #=> String
resp.cache_clusters[0].pending_modified_values.engine_version #=> String
resp.cache_clusters[0].pending_modified_values.cache_node_type #=> String
resp.cache_clusters[0].notification_configuration.topic_arn #=> String
resp.cache_clusters[0].notification_configuration.topic_status #=> String
resp.cache_clusters[0].cache_security_groups #=> Array
resp.cache_clusters[0].cache_security_groups[0].cache_security_group_name #=> String
resp.cache_clusters[0].cache_security_groups[0].status #=> String
resp.cache_clusters[0].cache_parameter_group.cache_parameter_group_name #=> String
resp.cache_clusters[0].cache_parameter_group.parameter_apply_status #=> String
resp.cache_clusters[0].cache_parameter_group.cache_node_ids_to_reboot #=> Array
resp.cache_clusters[0].cache_parameter_group.cache_node_ids_to_reboot[0] #=> String
resp.cache_clusters[0].cache_subnet_group_name #=> String
resp.cache_clusters[0].cache_nodes #=> Array
resp.cache_clusters[0].cache_nodes[0].cache_node_id #=> String
resp.cache_clusters[0].cache_nodes[0].cache_node_status #=> String
resp.cache_clusters[0].cache_nodes[0].cache_node_create_time #=> Time
resp.cache_clusters[0].cache_nodes[0].endpoint.address #=> String
resp.cache_clusters[0].cache_nodes[0].endpoint.port #=> Integer
resp.cache_clusters[0].cache_nodes[0].parameter_group_status #=> String
resp.cache_clusters[0].cache_nodes[0].source_cache_node_id #=> String
resp.cache_clusters[0].cache_nodes[0].customer_availability_zone #=> String
resp.cache_clusters[0].auto_minor_version_upgrade #=> Boolean
resp.cache_clusters[0].security_groups #=> Array
resp.cache_clusters[0].security_groups[0].security_group_id #=> String
resp.cache_clusters[0].security_groups[0].status #=> String
resp.cache_clusters[0].replication_group_id #=> String
resp.cache_clusters[0].snapshot_retention_limit #=> Integer
resp.cache_clusters[0].snapshot_window #=> String
resp.cache_clusters[0].auth_token_enabled #=> Boolean
resp.cache_clusters[0].transit_encryption_enabled #=> Boolean
resp.cache_clusters[0].at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_cluster_id (String) —

    The user-supplied cluster identifier. If this parameter is specified, only information about that specific cluster is returned. This parameter isn’t case sensitive.

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

  • :show_cache_node_info (Boolean) —

    An optional flag that can be included in the ‘DescribeCacheCluster` request to retrieve information about the individual cache nodes.

  • :show_cache_clusters_not_in_replication_groups (Boolean) —

    An optional flag that can be included in the ‘DescribeCacheCluster` request to show only nodes (API/CLI: clusters) that are not members of a replication group. In practice, this mean Memcached and single node Redis clusters.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 2943

def describe_cache_clusters(params = {}, options = {})
  req = build_request(:describe_cache_clusters, params)
  req.send_request(options)
end

#describe_cache_engine_versions(params = {}) ⇒ Types::CacheEngineVersionMessage

Returns a list of the available cache engines and their versions.

Examples:

Example: DescribeCacheEngineVersions


# Lists the details for up to 25 Memcached and Redis cache engine versions.

resp = client.describe_cache_engine_versions({
})

resp.to_h outputs the following:
{
  cache_engine_versions: [
    {
      cache_engine_description: "memcached", 
      cache_engine_version_description: "memcached version 1.4.14", 
      cache_parameter_group_family: "memcached1.4", 
      engine: "memcached", 
      engine_version: "1.4.14", 
    }, 
    {
      cache_engine_description: "memcached", 
      cache_engine_version_description: "memcached version 1.4.24", 
      cache_parameter_group_family: "memcached1.4", 
      engine: "memcached", 
      engine_version: "1.4.24", 
    }, 
    {
      cache_engine_description: "memcached", 
      cache_engine_version_description: "memcached version 1.4.33", 
      cache_parameter_group_family: "memcached1.4", 
      engine: "memcached", 
      engine_version: "1.4.33", 
    }, 
    {
      cache_engine_description: "memcached", 
      cache_engine_version_description: "memcached version 1.4.5", 
      cache_parameter_group_family: "memcached1.4", 
      engine: "memcached", 
      engine_version: "1.4.5", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.6.13", 
      cache_parameter_group_family: "redis2.6", 
      engine: "redis", 
      engine_version: "2.6.13", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.19", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.19", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.21", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.21", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.22 R5", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.22", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.23 R4", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.23", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.24 R3", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.24", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.6", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.6", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 3.2.4", 
      cache_parameter_group_family: "redis3.2", 
      engine: "redis", 
      engine_version: "3.2.4", 
    }, 
  ], 
}

Example: DescribeCacheEngineVersions


# Lists the details for up to 50 Redis cache engine versions.

resp = client.describe_cache_engine_versions({
  default_only: false, 
  engine: "redis", 
  max_records: 50, 
})

resp.to_h outputs the following:
{
  cache_engine_versions: [
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.6.13", 
      cache_parameter_group_family: "redis2.6", 
      engine: "redis", 
      engine_version: "2.6.13", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.19", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.19", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.21", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.21", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.22 R5", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.22", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.23 R4", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.23", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.24 R3", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.24", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 2.8.6", 
      cache_parameter_group_family: "redis2.8", 
      engine: "redis", 
      engine_version: "2.8.6", 
    }, 
    {
      cache_engine_description: "Redis", 
      cache_engine_version_description: "redis version 3.2.4", 
      cache_parameter_group_family: "redis3.2", 
      engine: "redis", 
      engine_version: "3.2.4", 
    }, 
  ], 
  marker: "", 
}

Request syntax with placeholder values


resp = client.describe_cache_engine_versions({
  engine: "String",
  engine_version: "String",
  cache_parameter_group_family: "String",
  max_records: 1,
  marker: "String",
  default_only: false,
})

Response structure


resp.marker #=> String
resp.cache_engine_versions #=> Array
resp.cache_engine_versions[0].engine #=> String
resp.cache_engine_versions[0].engine_version #=> String
resp.cache_engine_versions[0].cache_parameter_group_family #=> String
resp.cache_engine_versions[0].cache_engine_description #=> String
resp.cache_engine_versions[0].cache_engine_version_description #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :engine (String) —

    The cache engine to return. Valid values: ‘memcached` | `redis`

  • :engine_version (String) —

    The cache engine version to return.

    Example: ‘1.4.14`

  • :cache_parameter_group_family (String) —

    The name of a specific cache parameter group family to return details for.

    Valid values are: ‘memcached1.4` | `redis2.6` | `redis2.8` | `redis3.2` | `redis4.0`

    Constraints:

    • Must be 1 to 255 alphanumeric characters

    • First character must be a letter

    • Cannot end with a hyphen or contain two consecutive hyphens

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

  • :default_only (Boolean) —

    If ‘true`, specifies that only the default version of the specified engine or engine and major version combination is to be returned.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 3194

def describe_cache_engine_versions(params = {}, options = {})
  req = build_request(:describe_cache_engine_versions, params)
  req.send_request(options)
end

#describe_cache_parameter_groups(params = {}) ⇒ Types::CacheParameterGroupsMessage

Returns a list of cache parameter group descriptions. If a cache parameter group name is specified, the list contains only the descriptions for that group.

Examples:

Example: DescribeCacheParameterGroups


# Returns a list of cache parameter group descriptions. If a cache parameter group name is specified, the list contains
# only the descriptions for that group.

resp = client.describe_cache_parameter_groups({
  cache_parameter_group_name: "custom-mem1-4", 
})

resp.to_h outputs the following:
{
  cache_parameter_groups: [
    {
      cache_parameter_group_family: "memcached1.4", 
      cache_parameter_group_name: "custom-mem1-4", 
      description: "Custom memcache param group", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_cache_parameter_groups({
  cache_parameter_group_name: "String",
  max_records: 1,
  marker: "String",
})

Response structure


resp.marker #=> String
resp.cache_parameter_groups #=> Array
resp.cache_parameter_groups[0].cache_parameter_group_name #=> String
resp.cache_parameter_groups[0].cache_parameter_group_family #=> String
resp.cache_parameter_groups[0].description #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_parameter_group_name (String) —

    The name of a specific cache parameter group to return details for.

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 3268

def describe_cache_parameter_groups(params = {}, options = {})
  req = build_request(:describe_cache_parameter_groups, params)
  req.send_request(options)
end

#describe_cache_parameters(params = {}) ⇒ Types::CacheParameterGroupDetails

Returns the detailed parameter list for a particular cache parameter group.

Examples:

Example: DescribeCacheParameters


# Lists up to 100 user parameter values for the parameter group custom.redis2.8.

resp = client.describe_cache_parameters({
  cache_parameter_group_name: "custom-redis2-8", 
  max_records: 100, 
  source: "user", 
})

resp.to_h outputs the following:
{
  marker: "", 
  parameters: [
    {
      allowed_values: "yes,no", 
      change_type: "requires-reboot", 
      data_type: "string", 
      description: "Apply rehashing or not.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "activerehashing", 
      parameter_value: "yes", 
      source: "system", 
    }, 
    {
      allowed_values: "always,everysec,no", 
      change_type: "immediate", 
      data_type: "string", 
      description: "fsync policy for AOF persistence", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "appendfsync", 
      parameter_value: "everysec", 
      source: "system", 
    }, 
    {
      allowed_values: "yes,no", 
      change_type: "immediate", 
      data_type: "string", 
      description: "Enable Redis persistence.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "appendonly", 
      parameter_value: "no", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Normal client output buffer hard limit in bytes.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "client-output-buffer-limit-normal-hard-limit", 
      parameter_value: "0", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Normal client output buffer soft limit in bytes.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "client-output-buffer-limit-normal-soft-limit", 
      parameter_value: "0", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Normal client output buffer soft limit in seconds.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "client-output-buffer-limit-normal-soft-seconds", 
      parameter_value: "0", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Pubsub client output buffer hard limit in bytes.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "client-output-buffer-limit-pubsub-hard-limit", 
      parameter_value: "33554432", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Pubsub client output buffer soft limit in bytes.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "client-output-buffer-limit-pubsub-soft-limit", 
      parameter_value: "8388608", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Pubsub client output buffer soft limit in seconds.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "client-output-buffer-limit-pubsub-soft-seconds", 
      parameter_value: "60", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Slave client output buffer soft limit in seconds.", 
      is_modifiable: false, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "client-output-buffer-limit-slave-soft-seconds", 
      parameter_value: "60", 
      source: "system", 
    }, 
    {
      allowed_values: "yes,no", 
      change_type: "immediate", 
      data_type: "string", 
      description: "If enabled, clients who attempt to write to a read-only slave will be disconnected. Applicable to 2.8.23 and higher.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.23", 
      parameter_name: "close-on-slave-write", 
      parameter_value: "yes", 
      source: "system", 
    }, 
    {
      allowed_values: "1-1200000", 
      change_type: "requires-reboot", 
      data_type: "integer", 
      description: "Set the number of databases.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "databases", 
      parameter_value: "16", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The maximum number of hash entries in order for the dataset to be compressed.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "hash-max-ziplist-entries", 
      parameter_value: "512", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The threshold of biggest hash entries in order for the dataset to be compressed.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "hash-max-ziplist-value", 
      parameter_value: "64", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The maximum number of list entries in order for the dataset to be compressed.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "list-max-ziplist-entries", 
      parameter_value: "512", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The threshold of biggest list entries in order for the dataset to be compressed.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "list-max-ziplist-value", 
      parameter_value: "64", 
      source: "system", 
    }, 
    {
      allowed_values: "5000", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Max execution time of a Lua script in milliseconds. 0 for unlimited execution without warnings.", 
      is_modifiable: false, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "lua-time-limit", 
      parameter_value: "5000", 
      source: "system", 
    }, 
    {
      allowed_values: "1-65000", 
      change_type: "requires-reboot", 
      data_type: "integer", 
      description: "The maximum number of Redis clients.", 
      is_modifiable: false, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "maxclients", 
      parameter_value: "65000", 
      source: "system", 
    }, 
    {
      allowed_values: "volatile-lru,allkeys-lru,volatile-random,allkeys-random,volatile-ttl,noeviction", 
      change_type: "immediate", 
      data_type: "string", 
      description: "Max memory policy.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "maxmemory-policy", 
      parameter_value: "volatile-lru", 
      source: "system", 
    }, 
    {
      allowed_values: "1-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Max memory samples.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "maxmemory-samples", 
      parameter_value: "3", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Maximum number of seconds within which the master must receive a ping from a slave to take writes. Use this parameter together with min-slaves-to-write to regulate when the master stops accepting writes. Setting this value to 0 means the master always takes writes.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "min-slaves-max-lag", 
      parameter_value: "10", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Number of slaves that must be connected in order for master to take writes. Use this parameter together with min-slaves-max-lag to regulate when the master stops accepting writes. Setting this to 0 means the master always takes writes.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "min-slaves-to-write", 
      parameter_value: "0", 
      source: "system", 
    }, 
    {
      change_type: "immediate", 
      data_type: "string", 
      description: "The keyspace events for Redis to notify Pub/Sub clients about. By default all notifications are disabled", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "notify-keyspace-events", 
      source: "system", 
    }, 
    {
      allowed_values: "16384-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The replication backlog size in bytes for PSYNC. This is the size of the buffer which accumulates slave data when slave is disconnected for some time, so that when slave reconnects again, only transfer the portion of data which the slave missed. Minimum value is 16K.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "repl-backlog-size", 
      parameter_value: "1048576", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The amount of time in seconds after the master no longer have any slaves connected for the master to free the replication backlog. A value of 0 means to never release the backlog.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "repl-backlog-ttl", 
      parameter_value: "3600", 
      source: "system", 
    }, 
    {
      allowed_values: "11-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The timeout in seconds for bulk transfer I/O during sync and master timeout from the perspective of the slave, and slave timeout from the perspective of the master.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "repl-timeout", 
      parameter_value: "60", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The amount of memory reserved for non-cache memory usage, in bytes. You may want to increase this parameter for nodes with read replicas, AOF enabled, etc, to reduce swap usage.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "reserved-memory", 
      parameter_value: "0", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The limit in the size of the set in order for the dataset to be compressed.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "set-max-intset-entries", 
      parameter_value: "512", 
      source: "system", 
    }, 
    {
      allowed_values: "yes,no", 
      change_type: "immediate", 
      data_type: "string", 
      description: "Configures if chaining of slaves is allowed", 
      is_modifiable: false, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "slave-allow-chaining", 
      parameter_value: "no", 
      source: "system", 
    }, 
    {
      allowed_values: "-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The execution time, in microseconds, to exceed in order for the command to get logged. Note that a negative number disables the slow log, while a value of zero forces the logging of every command.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "slowlog-log-slower-than", 
      parameter_value: "10000", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The length of the slow log. There is no limit to this length. Just be aware that it will consume memory. You can reclaim memory used by the slow log with SLOWLOG RESET.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "slowlog-max-len", 
      parameter_value: "128", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "If non-zero, send ACKs every given number of seconds.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "tcp-keepalive", 
      parameter_value: "0", 
      source: "system", 
    }, 
    {
      allowed_values: "0,20-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "Close connection if client is idle for a given number of seconds, or never if 0.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "timeout", 
      parameter_value: "0", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The maximum number of sorted set entries in order for the dataset to be compressed.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "zset-max-ziplist-entries", 
      parameter_value: "128", 
      source: "system", 
    }, 
    {
      allowed_values: "0-", 
      change_type: "immediate", 
      data_type: "integer", 
      description: "The threshold of biggest sorted set entries in order for the dataset to be compressed.", 
      is_modifiable: true, 
      minimum_engine_version: "2.8.6", 
      parameter_name: "zset-max-ziplist-value", 
      parameter_value: "64", 
      source: "system", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_cache_parameters({
  cache_parameter_group_name: "String", # required
  source: "String",
  max_records: 1,
  marker: "String",
})

Response structure


resp.marker #=> String
resp.parameters #=> Array
resp.parameters[0].parameter_name #=> String
resp.parameters[0].parameter_value #=> String
resp.parameters[0].description #=> String
resp.parameters[0].source #=> String
resp.parameters[0].data_type #=> String
resp.parameters[0].allowed_values #=> String
resp.parameters[0].is_modifiable #=> Boolean
resp.parameters[0].minimum_engine_version #=> String
resp.parameters[0].change_type #=> String, one of "immediate", "requires-reboot"
resp.cache_node_type_specific_parameters #=> Array
resp.cache_node_type_specific_parameters[0].parameter_name #=> String
resp.cache_node_type_specific_parameters[0].description #=> String
resp.cache_node_type_specific_parameters[0].source #=> String
resp.cache_node_type_specific_parameters[0].data_type #=> String
resp.cache_node_type_specific_parameters[0].allowed_values #=> String
resp.cache_node_type_specific_parameters[0].is_modifiable #=> Boolean
resp.cache_node_type_specific_parameters[0].minimum_engine_version #=> String
resp.cache_node_type_specific_parameters[0].cache_node_type_specific_values #=> Array
resp.cache_node_type_specific_parameters[0].cache_node_type_specific_values[0].cache_node_type #=> String
resp.cache_node_type_specific_parameters[0].cache_node_type_specific_values[0].value #=> String
resp.cache_node_type_specific_parameters[0].change_type #=> String, one of "immediate", "requires-reboot"

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_parameter_group_name (required, String) —

    The name of a specific cache parameter group to return details for.

  • :source (String) —

    The parameter types to return.

    Valid values: ‘user` | `system` | `engine-default`

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 3746

def describe_cache_parameters(params = {}, options = {})
  req = build_request(:describe_cache_parameters, params)
  req.send_request(options)
end

#describe_cache_security_groups(params = {}) ⇒ Types::CacheSecurityGroupMessage

Returns a list of cache security group descriptions. If a cache security group name is specified, the list contains only the description of that group.

Examples:

Example: DescribeCacheSecurityGroups


# Returns a list of cache security group descriptions. If a cache security group name is specified, the list contains only
# the description of that group.

resp = client.describe_cache_security_groups({
  cache_security_group_name: "my-sec-group", 
})

Request syntax with placeholder values


resp = client.describe_cache_security_groups({
  cache_security_group_name: "String",
  max_records: 1,
  marker: "String",
})

Response structure


resp.marker #=> String
resp.cache_security_groups #=> Array
resp.cache_security_groups[0].owner_id #=> String
resp.cache_security_groups[0].cache_security_group_name #=> String
resp.cache_security_groups[0].description #=> String
resp.cache_security_groups[0].ec2_security_groups #=> Array
resp.cache_security_groups[0].ec2_security_groups[0].status #=> String
resp.cache_security_groups[0].ec2_security_groups[0].ec2_security_group_name #=> String
resp.cache_security_groups[0].ec2_security_groups[0].ec2_security_group_owner_id #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_security_group_name (String) —

    The name of the cache security group to return details for.

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 3813

def describe_cache_security_groups(params = {}, options = {})
  req = build_request(:describe_cache_security_groups, params)
  req.send_request(options)
end

#describe_cache_subnet_groups(params = {}) ⇒ Types::CacheSubnetGroupMessage

Returns a list of cache subnet group descriptions. If a subnet group name is specified, the list contains only the description of that group.

Examples:

Example: DescribeCacheSubnetGroups


# Describes up to 25 cache subnet groups.

resp = client.describe_cache_subnet_groups({
  max_records: 25, 
})

resp.to_h outputs the following:
{
  cache_subnet_groups: [
    {
      cache_subnet_group_description: "Default CacheSubnetGroup", 
      cache_subnet_group_name: "default", 
      subnets: [
        {
          subnet_availability_zone: {
            name: "us-east-1a", 
          }, 
          subnet_identifier: "subnet-1a2b3c4d", 
        }, 
        {
          subnet_availability_zone: {
            name: "us-east-1c", 
          }, 
          subnet_identifier: "subnet-a1b2c3d4", 
        }, 
        {
          subnet_availability_zone: {
            name: "us-east-1e", 
          }, 
          subnet_identifier: "subnet-abcd1234", 
        }, 
        {
          subnet_availability_zone: {
            name: "us-east-1b", 
          }, 
          subnet_identifier: "subnet-1234abcd", 
        }, 
      ], 
      vpc_id: "vpc-91280df6", 
    }, 
  ], 
  marker: "", 
}

Request syntax with placeholder values


resp = client.describe_cache_subnet_groups({
  cache_subnet_group_name: "String",
  max_records: 1,
  marker: "String",
})

Response structure


resp.marker #=> String
resp.cache_subnet_groups #=> Array
resp.cache_subnet_groups[0].cache_subnet_group_name #=> String
resp.cache_subnet_groups[0].cache_subnet_group_description #=> String
resp.cache_subnet_groups[0].vpc_id #=> String
resp.cache_subnet_groups[0].subnets #=> Array
resp.cache_subnet_groups[0].subnets[0].subnet_identifier #=> String
resp.cache_subnet_groups[0].subnets[0].subnet_availability_zone.name #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_subnet_group_name (String) —

    The name of the cache subnet group to return details for.

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 3916

def describe_cache_subnet_groups(params = {}, options = {})
  req = build_request(:describe_cache_subnet_groups, params)
  req.send_request(options)
end

#describe_engine_default_parameters(params = {}) ⇒ Types::DescribeEngineDefaultParametersResult

Returns the default engine and system parameter information for the specified cache engine.

Examples:

Example: DescribeEngineDefaultParameters


# Returns the default engine and system parameter information for the specified cache engine.

resp = client.describe_engine_default_parameters({
  cache_parameter_group_family: "redis2.8", 
  max_records: 25, 
})

resp.to_h outputs the following:
{
  engine_defaults: {
    cache_node_type_specific_parameters: [
      {
        allowed_values: "0-", 
        cache_node_type_specific_values: [
          {
            cache_node_type: "cache.c1.xlarge", 
            value: "650117120", 
          }, 
          {
            cache_node_type: "cache.m1.large", 
            value: "702545920", 
          }, 
          {
            cache_node_type: "cache.m1.medium", 
            value: "309329920", 
          }, 
          {
            cache_node_type: "cache.m1.small", 
            value: "94371840", 
          }, 
          {
            cache_node_type: "cache.m1.xlarge", 
            value: "1488977920", 
          }, 
          {
            cache_node_type: "cache.m2.2xlarge", 
            value: "3502243840", 
          }, 
          {
            cache_node_type: "cache.m2.4xlarge", 
            value: "7088373760", 
          }, 
          {
            cache_node_type: "cache.m2.xlarge", 
            value: "1709178880", 
          }, 
          {
            cache_node_type: "cache.m3.2xlarge", 
            value: "2998927360", 
          }, 
          {
            cache_node_type: "cache.m3.large", 
            value: "650117120", 
          }, 
          {
            cache_node_type: "cache.m3.medium", 
            value: "309329920", 
          }, 
          {
            cache_node_type: "cache.m3.xlarge", 
            value: "1426063360", 
          }, 
          {
            cache_node_type: "cache.m4.10xlarge", 
            value: "16604761424", 
          }, 
          {
            cache_node_type: "cache.m4.2xlarge", 
            value: "3188912636", 
          }, 
          {
            cache_node_type: "cache.m4.4xlarge", 
            value: "6525729063", 
          }, 
          {
            cache_node_type: "cache.m4.large", 
            value: "689259315", 
          }, 
          {
            cache_node_type: "cache.m4.xlarge", 
            value: "1532850176", 
          }, 
          {
            cache_node_type: "cache.r3.2xlarge", 
            value: "6081740800", 
          }, 
          {
            cache_node_type: "cache.r3.4xlarge", 
            value: "12268339200", 
          }, 
          {
            cache_node_type: "cache.r3.8xlarge", 
            value: "24536678400", 
          }, 
          {
            cache_node_type: "cache.r3.large", 
            value: "1468006400", 
          }, 
          {
            cache_node_type: "cache.r3.xlarge", 
            value: "3040870400", 
          }, 
          {
            cache_node_type: "cache.t1.micro", 
            value: "14260633", 
          }, 
          {
            cache_node_type: "cache.t2.medium", 
            value: "346134937", 
          }, 
          {
            cache_node_type: "cache.t2.micro", 
            value: "58195968", 
          }, 
          {
            cache_node_type: "cache.t2.small", 
            value: "166513868", 
          }, 
        ], 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Slave client output buffer hard limit in bytes.", 
        is_modifiable: false, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "client-output-buffer-limit-slave-hard-limit", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        cache_node_type_specific_values: [
          {
            cache_node_type: "cache.c1.xlarge", 
            value: "650117120", 
          }, 
          {
            cache_node_type: "cache.m1.large", 
            value: "702545920", 
          }, 
          {
            cache_node_type: "cache.m1.medium", 
            value: "309329920", 
          }, 
          {
            cache_node_type: "cache.m1.small", 
            value: "94371840", 
          }, 
          {
            cache_node_type: "cache.m1.xlarge", 
            value: "1488977920", 
          }, 
          {
            cache_node_type: "cache.m2.2xlarge", 
            value: "3502243840", 
          }, 
          {
            cache_node_type: "cache.m2.4xlarge", 
            value: "7088373760", 
          }, 
          {
            cache_node_type: "cache.m2.xlarge", 
            value: "1709178880", 
          }, 
          {
            cache_node_type: "cache.m3.2xlarge", 
            value: "2998927360", 
          }, 
          {
            cache_node_type: "cache.m3.large", 
            value: "650117120", 
          }, 
          {
            cache_node_type: "cache.m3.medium", 
            value: "309329920", 
          }, 
          {
            cache_node_type: "cache.m3.xlarge", 
            value: "1426063360", 
          }, 
          {
            cache_node_type: "cache.m4.10xlarge", 
            value: "16604761424", 
          }, 
          {
            cache_node_type: "cache.m4.2xlarge", 
            value: "3188912636", 
          }, 
          {
            cache_node_type: "cache.m4.4xlarge", 
            value: "6525729063", 
          }, 
          {
            cache_node_type: "cache.m4.large", 
            value: "689259315", 
          }, 
          {
            cache_node_type: "cache.m4.xlarge", 
            value: "1532850176", 
          }, 
          {
            cache_node_type: "cache.r3.2xlarge", 
            value: "6081740800", 
          }, 
          {
            cache_node_type: "cache.r3.4xlarge", 
            value: "12268339200", 
          }, 
          {
            cache_node_type: "cache.r3.8xlarge", 
            value: "24536678400", 
          }, 
          {
            cache_node_type: "cache.r3.large", 
            value: "1468006400", 
          }, 
          {
            cache_node_type: "cache.r3.xlarge", 
            value: "3040870400", 
          }, 
          {
            cache_node_type: "cache.t1.micro", 
            value: "14260633", 
          }, 
          {
            cache_node_type: "cache.t2.medium", 
            value: "346134937", 
          }, 
          {
            cache_node_type: "cache.t2.micro", 
            value: "58195968", 
          }, 
          {
            cache_node_type: "cache.t2.small", 
            value: "166513868", 
          }, 
        ], 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Slave client output buffer soft limit in bytes.", 
        is_modifiable: false, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "client-output-buffer-limit-slave-soft-limit", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        cache_node_type_specific_values: [
          {
            cache_node_type: "cache.c1.xlarge", 
            value: "6501171200", 
          }, 
          {
            cache_node_type: "cache.m1.large", 
            value: "7025459200", 
          }, 
          {
            cache_node_type: "cache.m1.medium", 
            value: "3093299200", 
          }, 
          {
            cache_node_type: "cache.m1.small", 
            value: "943718400", 
          }, 
          {
            cache_node_type: "cache.m1.xlarge", 
            value: "14889779200", 
          }, 
          {
            cache_node_type: "cache.m2.2xlarge", 
            value: "35022438400", 
          }, 
          {
            cache_node_type: "cache.m2.4xlarge", 
            value: "70883737600", 
          }, 
          {
            cache_node_type: "cache.m2.xlarge", 
            value: "17091788800", 
          }, 
          {
            cache_node_type: "cache.m3.2xlarge", 
            value: "29989273600", 
          }, 
          {
            cache_node_type: "cache.m3.large", 
            value: "6501171200", 
          }, 
          {
            cache_node_type: "cache.m3.medium", 
            value: "2988441600", 
          }, 
          {
            cache_node_type: "cache.m3.xlarge", 
            value: "14260633600", 
          }, 
          {
            cache_node_type: "cache.m4.10xlarge", 
            value: "166047614239", 
          }, 
          {
            cache_node_type: "cache.m4.2xlarge", 
            value: "31889126359", 
          }, 
          {
            cache_node_type: "cache.m4.4xlarge", 
            value: "65257290629", 
          }, 
          {
            cache_node_type: "cache.m4.large", 
            value: "6892593152", 
          }, 
          {
            cache_node_type: "cache.m4.xlarge", 
            value: "15328501760", 
          }, 
          {
            cache_node_type: "cache.r3.2xlarge", 
            value: "62495129600", 
          }, 
          {
            cache_node_type: "cache.r3.4xlarge", 
            value: "126458265600", 
          }, 
          {
            cache_node_type: "cache.r3.8xlarge", 
            value: "254384537600", 
          }, 
          {
            cache_node_type: "cache.r3.large", 
            value: "14470348800", 
          }, 
          {
            cache_node_type: "cache.r3.xlarge", 
            value: "30513561600", 
          }, 
          {
            cache_node_type: "cache.t1.micro", 
            value: "142606336", 
          }, 
          {
            cache_node_type: "cache.t2.medium", 
            value: "3461349376", 
          }, 
          {
            cache_node_type: "cache.t2.micro", 
            value: "581959680", 
          }, 
          {
            cache_node_type: "cache.t2.small", 
            value: "1665138688", 
          }, 
        ], 
        change_type: "immediate", 
        data_type: "integer", 
        description: "The maximum configurable amount of memory to use to store items, in bytes.", 
        is_modifiable: false, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "maxmemory", 
        source: "system", 
      }, 
    ], 
    cache_parameter_group_family: "redis2.8", 
    marker: "bWluLXNsYXZlcy10by13cml0ZQ==", 
    parameters: [
      {
        allowed_values: "yes,no", 
        change_type: "requires-reboot", 
        data_type: "string", 
        description: "Apply rehashing or not.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "activerehashing", 
        parameter_value: "yes", 
        source: "system", 
      }, 
      {
        allowed_values: "always,everysec,no", 
        change_type: "immediate", 
        data_type: "string", 
        description: "fsync policy for AOF persistence", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "appendfsync", 
        parameter_value: "everysec", 
        source: "system", 
      }, 
      {
        allowed_values: "yes,no", 
        change_type: "immediate", 
        data_type: "string", 
        description: "Enable Redis persistence.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "appendonly", 
        parameter_value: "no", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Normal client output buffer hard limit in bytes.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "client-output-buffer-limit-normal-hard-limit", 
        parameter_value: "0", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Normal client output buffer soft limit in bytes.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "client-output-buffer-limit-normal-soft-limit", 
        parameter_value: "0", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Normal client output buffer soft limit in seconds.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "client-output-buffer-limit-normal-soft-seconds", 
        parameter_value: "0", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Pubsub client output buffer hard limit in bytes.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "client-output-buffer-limit-pubsub-hard-limit", 
        parameter_value: "33554432", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Pubsub client output buffer soft limit in bytes.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "client-output-buffer-limit-pubsub-soft-limit", 
        parameter_value: "8388608", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Pubsub client output buffer soft limit in seconds.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "client-output-buffer-limit-pubsub-soft-seconds", 
        parameter_value: "60", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Slave client output buffer soft limit in seconds.", 
        is_modifiable: false, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "client-output-buffer-limit-slave-soft-seconds", 
        parameter_value: "60", 
        source: "system", 
      }, 
      {
        allowed_values: "yes,no", 
        change_type: "immediate", 
        data_type: "string", 
        description: "If enabled, clients who attempt to write to a read-only slave will be disconnected. Applicable to 2.8.23 and higher.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.23", 
        parameter_name: "close-on-slave-write", 
        parameter_value: "yes", 
        source: "system", 
      }, 
      {
        allowed_values: "1-1200000", 
        change_type: "requires-reboot", 
        data_type: "integer", 
        description: "Set the number of databases.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "databases", 
        parameter_value: "16", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "The maximum number of hash entries in order for the dataset to be compressed.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "hash-max-ziplist-entries", 
        parameter_value: "512", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "The threshold of biggest hash entries in order for the dataset to be compressed.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "hash-max-ziplist-value", 
        parameter_value: "64", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "The maximum number of list entries in order for the dataset to be compressed.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "list-max-ziplist-entries", 
        parameter_value: "512", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "The threshold of biggest list entries in order for the dataset to be compressed.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "list-max-ziplist-value", 
        parameter_value: "64", 
        source: "system", 
      }, 
      {
        allowed_values: "5000", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Max execution time of a Lua script in milliseconds. 0 for unlimited execution without warnings.", 
        is_modifiable: false, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "lua-time-limit", 
        parameter_value: "5000", 
        source: "system", 
      }, 
      {
        allowed_values: "1-65000", 
        change_type: "requires-reboot", 
        data_type: "integer", 
        description: "The maximum number of Redis clients.", 
        is_modifiable: false, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "maxclients", 
        parameter_value: "65000", 
        source: "system", 
      }, 
      {
        allowed_values: "volatile-lru,allkeys-lru,volatile-random,allkeys-random,volatile-ttl,noeviction", 
        change_type: "immediate", 
        data_type: "string", 
        description: "Max memory policy.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "maxmemory-policy", 
        parameter_value: "volatile-lru", 
        source: "system", 
      }, 
      {
        allowed_values: "1-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Max memory samples.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "maxmemory-samples", 
        parameter_value: "3", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Maximum number of seconds within which the master must receive a ping from a slave to take writes. Use this parameter together with min-slaves-to-write to regulate when the master stops accepting writes. Setting this value to 0 means the master always takes writes.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "min-slaves-max-lag", 
        parameter_value: "10", 
        source: "system", 
      }, 
      {
        allowed_values: "0-", 
        change_type: "immediate", 
        data_type: "integer", 
        description: "Number of slaves that must be connected in order for master to take writes. Use this parameter together with min-slaves-max-lag to regulate when the master stops accepting writes. Setting this to 0 means the master always takes writes.", 
        is_modifiable: true, 
        minimum_engine_version: "2.8.6", 
        parameter_name: "min-slaves-to-write", 
        parameter_value: "0", 
        source: "system", 
      }, 
    ], 
  }, 
}

Request syntax with placeholder values


resp = client.describe_engine_default_parameters({
  cache_parameter_group_family: "String", # required
  max_records: 1,
  marker: "String",
})

Response structure


resp.engine_defaults.cache_parameter_group_family #=> String
resp.engine_defaults.marker #=> String
resp.engine_defaults.parameters #=> Array
resp.engine_defaults.parameters[0].parameter_name #=> String
resp.engine_defaults.parameters[0].parameter_value #=> String
resp.engine_defaults.parameters[0].description #=> String
resp.engine_defaults.parameters[0].source #=> String
resp.engine_defaults.parameters[0].data_type #=> String
resp.engine_defaults.parameters[0].allowed_values #=> String
resp.engine_defaults.parameters[0].is_modifiable #=> Boolean
resp.engine_defaults.parameters[0].minimum_engine_version #=> String
resp.engine_defaults.parameters[0].change_type #=> String, one of "immediate", "requires-reboot"
resp.engine_defaults.cache_node_type_specific_parameters #=> Array
resp.engine_defaults.cache_node_type_specific_parameters[0].parameter_name #=> String
resp.engine_defaults.cache_node_type_specific_parameters[0].description #=> String
resp.engine_defaults.cache_node_type_specific_parameters[0].source #=> String
resp.engine_defaults.cache_node_type_specific_parameters[0].data_type #=> String
resp.engine_defaults.cache_node_type_specific_parameters[0].allowed_values #=> String
resp.engine_defaults.cache_node_type_specific_parameters[0].is_modifiable #=> Boolean
resp.engine_defaults.cache_node_type_specific_parameters[0].minimum_engine_version #=> String
resp.engine_defaults.cache_node_type_specific_parameters[0].cache_node_type_specific_values #=> Array
resp.engine_defaults.cache_node_type_specific_parameters[0].cache_node_type_specific_values[0].cache_node_type #=> String
resp.engine_defaults.cache_node_type_specific_parameters[0].cache_node_type_specific_values[0].value #=> String
resp.engine_defaults.cache_node_type_specific_parameters[0].change_type #=> String, one of "immediate", "requires-reboot"

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_parameter_group_family (required, String) —

    The name of the cache parameter group family.

    Valid values are: ‘memcached1.4` | `redis2.6` | `redis2.8` | `redis3.2` | `redis4.0`

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 4601

def describe_engine_default_parameters(params = {}, options = {})
  req = build_request(:describe_engine_default_parameters, params)
  req.send_request(options)
end

#describe_events(params = {}) ⇒ Types::EventsMessage

Returns events related to clusters, cache security groups, and cache parameter groups. You can obtain events specific to a particular cluster, cache security group, or cache parameter group by providing the name as a parameter.

By default, only the events occurring within the last hour are returned; however, you can retrieve up to 14 days’ worth of events if necessary.

Examples:

Example: DescribeEvents


# Describes all the cache-cluster events for the past 120 minutes.

resp = client.describe_events({
  duration: 360, 
  source_type: "cache-cluster", 
})

resp.to_h outputs the following:
{
  events: [
    {
      date: Time.parse("2016-12-22T16:27:56.088Z"), 
      message: "Added cache node 0001 in availability zone us-east-1e", 
      source_identifier: "redis-cluster", 
      source_type: "cache-cluster", 
    }, 
    {
      date: Time.parse("2016-12-22T16:27:56.078Z"), 
      message: "Cache cluster created", 
      source_identifier: "redis-cluster", 
      source_type: "cache-cluster", 
    }, 
    {
      date: Time.parse("2016-12-22T16:05:17.326Z"), 
      message: "Added cache node 0002 in availability zone us-east-1c", 
      source_identifier: "my-memcached2", 
      source_type: "cache-cluster", 
    }, 
    {
      date: Time.parse("2016-12-22T16:05:17.323Z"), 
      message: "Added cache node 0001 in availability zone us-east-1e", 
      source_identifier: "my-memcached2", 
      source_type: "cache-cluster", 
    }, 
    {
      date: Time.parse("2016-12-22T16:05:17.314Z"), 
      message: "Cache cluster created", 
      source_identifier: "my-memcached2", 
      source_type: "cache-cluster", 
    }, 
  ], 
  marker: "", 
}

Example: DescribeEvents


# Describes all the replication-group events from 3:00P to 5:00P on November 11, 2016.

resp = client.describe_events({
  start_time: Time.parse("2016-12-22T15:00:00.000Z"), 
})

resp.to_h outputs the following:
{
  events: [
    {
      date: Time.parse("2016-12-22T21:35:46.674Z"), 
      message: "Snapshot succeeded for snapshot with ID 'cr-bkup' of replication group with ID 'clustered-redis'", 
      source_identifier: "clustered-redis-0001-001", 
      source_type: "cache-cluster", 
    }, 
    {
      date: Time.parse("2016-12-22T16:27:56.088Z"), 
      message: "Added cache node 0001 in availability zone us-east-1e", 
      source_identifier: "redis-cluster", 
      source_type: "cache-cluster", 
    }, 
    {
      date: Time.parse("2016-12-22T16:27:56.078Z"), 
      message: "Cache cluster created", 
      source_identifier: "redis-cluster", 
      source_type: "cache-cluster", 
    }, 
    {
      date: Time.parse("2016-12-22T16:05:17.326Z"), 
      message: "Added cache node 0002 in availability zone us-east-1c", 
      source_identifier: "my-memcached2", 
      source_type: "cache-cluster", 
    }, 
    {
      date: Time.parse("2016-12-22T16:05:17.323Z"), 
      message: "Added cache node 0001 in availability zone us-east-1e", 
      source_identifier: "my-memcached2", 
      source_type: "cache-cluster", 
    }, 
    {
      date: Time.parse("2016-12-22T16:05:17.314Z"), 
      message: "Cache cluster created", 
      source_identifier: "my-memcached2", 
      source_type: "cache-cluster", 
    }, 
  ], 
  marker: "", 
}

Request syntax with placeholder values


resp = client.describe_events({
  source_identifier: "String",
  source_type: "cache-cluster", # accepts cache-cluster, cache-parameter-group, cache-security-group, cache-subnet-group, replication-group
  start_time: Time.now,
  end_time: Time.now,
  duration: 1,
  max_records: 1,
  marker: "String",
})

Response structure


resp.marker #=> String
resp.events #=> Array
resp.events[0].source_identifier #=> String
resp.events[0].source_type #=> String, one of "cache-cluster", "cache-parameter-group", "cache-security-group", "cache-subnet-group", "replication-group"
resp.events[0].message #=> String
resp.events[0].date #=> Time

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :source_identifier (String) —

    The identifier of the event source for which events are returned. If not specified, all sources are included in the response.

  • :source_type (String) —

    The event source to retrieve events for. If no value is specified, all events are returned.

  • :start_time (Time, DateTime, Date, Integer, String) —

    The beginning of the time interval to retrieve events for, specified in ISO 8601 format.

    Example: 2017-03-30T07:03:49.555Z

  • :end_time (Time, DateTime, Date, Integer, String) —

    The end of the time interval for which to retrieve events, specified in ISO 8601 format.

    Example: 2017-03-30T07:03:49.555Z

  • :duration (Integer) —

    The number of minutes worth of events to retrieve.

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 4782

def describe_events(params = {}, options = {})
  req = build_request(:describe_events, params)
  req.send_request(options)
end

#describe_replication_groups(params = {}) ⇒ Types::ReplicationGroupMessage

Returns information about a particular replication group. If no identifier is specified, ‘DescribeReplicationGroups` returns information about all replication groups.

<note markdown=“1”> This operation is valid for Redis only.

</note>

Examples:

Example: DescribeReplicationGroups


# Returns information about the replication group myreplgroup.

resp = client.describe_replication_groups({
})

resp.to_h outputs the following:
{
  marker: "", 
  replication_groups: [
    {
      automatic_failover: "enabled", 
      description: "Test cluster", 
      member_clusters: [
        "clustered-redis-0001-001", 
        "clustered-redis-0001-002", 
        "clustered-redis-0002-001", 
        "clustered-redis-0002-002", 
      ], 
      node_groups: [
        {
          node_group_id: "0001", 
          node_group_members: [
            {
              cache_cluster_id: "clustered-redis-0001-001", 
              cache_node_id: "0001", 
              preferred_availability_zone: "us-east-1e", 
            }, 
            {
              cache_cluster_id: "clustered-redis-0001-002", 
              cache_node_id: "0001", 
              preferred_availability_zone: "us-east-1c", 
            }, 
          ], 
          status: "available", 
        }, 
        {
          node_group_id: "0002", 
          node_group_members: [
            {
              cache_cluster_id: "clustered-redis-0002-001", 
              cache_node_id: "0001", 
              preferred_availability_zone: "us-east-1c", 
            }, 
            {
              cache_cluster_id: "clustered-redis-0002-002", 
              cache_node_id: "0001", 
              preferred_availability_zone: "us-east-1b", 
            }, 
          ], 
          status: "available", 
        }, 
      ], 
      pending_modified_values: {
      }, 
      replication_group_id: "clustered-redis", 
      status: "available", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_replication_groups({
  replication_group_id: "String",
  max_records: 1,
  marker: "String",
})

Response structure


resp.marker #=> String
resp.replication_groups #=> Array
resp.replication_groups[0].replication_group_id #=> String
resp.replication_groups[0].description #=> String
resp.replication_groups[0].status #=> String
resp.replication_groups[0].pending_modified_values.primary_cluster_id #=> String
resp.replication_groups[0].pending_modified_values.automatic_failover_status #=> String, one of "enabled", "disabled"
resp.replication_groups[0].pending_modified_values.resharding.slot_migration.progress_percentage #=> Float
resp.replication_groups[0].member_clusters #=> Array
resp.replication_groups[0].member_clusters[0] #=> String
resp.replication_groups[0].node_groups #=> Array
resp.replication_groups[0].node_groups[0].node_group_id #=> String
resp.replication_groups[0].node_groups[0].status #=> String
resp.replication_groups[0].node_groups[0].primary_endpoint.address #=> String
resp.replication_groups[0].node_groups[0].primary_endpoint.port #=> Integer
resp.replication_groups[0].node_groups[0].slots #=> String
resp.replication_groups[0].node_groups[0].node_group_members #=> Array
resp.replication_groups[0].node_groups[0].node_group_members[0].cache_cluster_id #=> String
resp.replication_groups[0].node_groups[0].node_group_members[0].cache_node_id #=> String
resp.replication_groups[0].node_groups[0].node_group_members[0].read_endpoint.address #=> String
resp.replication_groups[0].node_groups[0].node_group_members[0].read_endpoint.port #=> Integer
resp.replication_groups[0].node_groups[0].node_group_members[0].preferred_availability_zone #=> String
resp.replication_groups[0].node_groups[0].node_group_members[0].current_role #=> String
resp.replication_groups[0].snapshotting_cluster_id #=> String
resp.replication_groups[0].automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.replication_groups[0].configuration_endpoint.address #=> String
resp.replication_groups[0].configuration_endpoint.port #=> Integer
resp.replication_groups[0].snapshot_retention_limit #=> Integer
resp.replication_groups[0].snapshot_window #=> String
resp.replication_groups[0].cluster_enabled #=> Boolean
resp.replication_groups[0].cache_node_type #=> String
resp.replication_groups[0].auth_token_enabled #=> Boolean
resp.replication_groups[0].transit_encryption_enabled #=> Boolean
resp.replication_groups[0].at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :replication_group_id (String) —

    The identifier for the replication group to be described. This parameter is not case sensitive.

    If you do not specify this parameter, information about all replication groups is returned.

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 4935

def describe_replication_groups(params = {}, options = {})
  req = build_request(:describe_replication_groups, params)
  req.send_request(options)
end

#describe_reserved_cache_nodes(params = {}) ⇒ Types::ReservedCacheNodeMessage

Returns information about reserved cache nodes for this account, or about a specified reserved cache node.

Examples:

Example: DescribeReservedCacheNodes


# Returns information about reserved cache nodes for this account, or about a specified reserved cache node. If the
# account has no reserved cache nodes, the operation returns an empty list, as shown here.

resp = client.describe_reserved_cache_nodes({
  max_records: 25, 
})

Request syntax with placeholder values


resp = client.describe_reserved_cache_nodes({
  reserved_cache_node_id: "String",
  reserved_cache_nodes_offering_id: "String",
  cache_node_type: "String",
  duration: "String",
  product_description: "String",
  offering_type: "String",
  max_records: 1,
  marker: "String",
})

Response structure


resp.marker #=> String
resp.reserved_cache_nodes #=> Array
resp.reserved_cache_nodes[0].reserved_cache_node_id #=> String
resp.reserved_cache_nodes[0].reserved_cache_nodes_offering_id #=> String
resp.reserved_cache_nodes[0].cache_node_type #=> String
resp.reserved_cache_nodes[0].start_time #=> Time
resp.reserved_cache_nodes[0].duration #=> Integer
resp.reserved_cache_nodes[0].fixed_price #=> Float
resp.reserved_cache_nodes[0].usage_price #=> Float
resp.reserved_cache_nodes[0].cache_node_count #=> Integer
resp.reserved_cache_nodes[0].product_description #=> String
resp.reserved_cache_nodes[0].offering_type #=> String
resp.reserved_cache_nodes[0].state #=> String
resp.reserved_cache_nodes[0].recurring_charges #=> Array
resp.reserved_cache_nodes[0].recurring_charges[0].recurring_charge_amount #=> Float
resp.reserved_cache_nodes[0].recurring_charges[0].recurring_charge_frequency #=> String
resp.reserved_cache_nodes[0].reservation_arn #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :reserved_cache_node_id (String) —

    The reserved cache node identifier filter value. Use this parameter to show only the reservation that matches the specified reservation ID.

  • :reserved_cache_nodes_offering_id (String) —

    The offering identifier filter value. Use this parameter to show only purchased reservations matching the specified offering identifier.

  • :cache_node_type (String) —

    The cache node type filter value. Use this parameter to show only those reservations matching the specified cache node type.

    The following node types are supported by ElastiCache. Generally speaking, the current generation types provide more memory and computational power at lower cost when compared to their equivalent previous generation counterparts.

    • General purpose:

      • Current generation:

        **T2 node types:** ‘cache.t2.micro`, `cache.t2.small`, `cache.t2.medium`

        **M3 node types:** ‘cache.m3.medium`, `cache.m3.large`, `cache.m3.xlarge`, `cache.m3.2xlarge`

        **M4 node types:** ‘cache.m4.large`, `cache.m4.xlarge`, `cache.m4.2xlarge`, `cache.m4.4xlarge`, `cache.m4.10xlarge`

      • Previous generation: (not recommended)

        **T1 node types:** ‘cache.t1.micro`

        **M1 node types:** ‘cache.m1.small`, `cache.m1.medium`, `cache.m1.large`, `cache.m1.xlarge`

    • Compute optimized:

      • Previous generation: (not recommended)

        **C1 node types:** ‘cache.c1.xlarge`

    • Memory optimized:

      • Current generation:

        **R3 node types:** ‘cache.r3.large`, `cache.r3.xlarge`, `cache.r3.2xlarge`, `cache.r3.4xlarge`, `cache.r3.8xlarge`

        **R4 node types;** ‘cache.r4.large`, `cache.r4.xlarge`, `cache.r4.2xlarge`, `cache.r4.4xlarge`, `cache.r4.8xlarge`, `cache.r4.16xlarge`

      • Previous generation: (not recommended)

        **M2 node types:** ‘cache.m2.xlarge`, `cache.m2.2xlarge`, `cache.m2.4xlarge`

    Notes:

    • All T2 instances are created in an Amazon Virtual Private Cloud (Amazon VPC).

    • Redis (cluster mode disabled): Redis backup/restore is not supported on T1 and T2 instances.

    • Redis (cluster mode enabled): Backup/restore is not supported on T1 instances.

    • Redis Append-only files (AOF) functionality is not supported for T1 or T2 instances.

    For a complete listing of node types and specifications, see:

    • Amazon ElastiCache Product Features and Details][1
    • Cache Node Type-Specific Parameters for Memcached][2
    • Cache Node Type-Specific Parameters for Redis][3

    [1]: aws.amazon.com/elasticache/details [2]: docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/ParameterGroups.Memcached.html#ParameterGroups.Memcached.NodeSpecific [3]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/ParameterGroups.Redis.html#ParameterGroups.Redis.NodeSpecific

  • :duration (String) —

    The duration filter value, specified in years or seconds. Use this parameter to show only reservations for this duration.

    Valid Values: ‘1 | 3 | 31536000 | 94608000`

  • :product_description (String) —

    The product description filter value. Use this parameter to show only those reservations matching the specified product description.

  • :offering_type (String) —

    The offering type filter value. Use this parameter to show only the available offerings matching the specified offering type.

    Valid values: ‘“Light Utilization”|“Medium Utilization”|“Heavy Utilization”`

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 5115

def describe_reserved_cache_nodes(params = {}, options = {})
  req = build_request(:describe_reserved_cache_nodes, params)
  req.send_request(options)
end

#describe_reserved_cache_nodes_offerings(params = {}) ⇒ Types::ReservedCacheNodesOfferingMessage

Lists available reserved cache node offerings.

Examples:

Example: DescribeReseredCacheNodeOfferings


# Lists available reserved cache node offerings.

resp = client.describe_reserved_cache_nodes_offerings({
  max_records: 20, 
})

resp.to_h outputs the following:
{
  marker: "1ef01f5b-433f-94ff-a530-61a56bfc8e7a", 
  reserved_cache_nodes_offerings: [
    {
      cache_node_type: "cache.m1.small", 
      duration: 94608000, 
      fixed_price: 157.0, 
      offering_type: "Medium Utilization", 
      product_description: "memcached", 
      recurring_charges: [
      ], 
      reserved_cache_nodes_offering_id: "0167633d-37f6-4222-b872-b1f22eb79ba4", 
      usage_price: 0.017, 
    }, 
    {
      cache_node_type: "cache.m4.xlarge", 
      duration: 94608000, 
      fixed_price: 1248.0, 
      offering_type: "Heavy Utilization", 
      product_description: "redis", 
      recurring_charges: [
        {
          recurring_charge_amount: 0.077, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "02c04e13-baca-4e71-9ceb-620eed94827d", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.m2.4xlarge", 
      duration: 94608000, 
      fixed_price: 2381.0, 
      offering_type: "Medium Utilization", 
      product_description: "memcached", 
      recurring_charges: [
      ], 
      reserved_cache_nodes_offering_id: "02e1755e-76e8-48e3-8d82-820a5726a458", 
      usage_price: 0.276, 
    }, 
    {
      cache_node_type: "cache.m1.small", 
      duration: 94608000, 
      fixed_price: 188.0, 
      offering_type: "Heavy Utilization", 
      product_description: "redis", 
      recurring_charges: [
        {
          recurring_charge_amount: 0.013, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "03315215-7b87-421a-a3dd-785021e4113f", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.m4.10xlarge", 
      duration: 31536000, 
      fixed_price: 6158.0, 
      offering_type: "Heavy Utilization", 
      product_description: "redis", 
      recurring_charges: [
        {
          recurring_charge_amount: 1.125, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "05ffbb44-2ace-4476-a2a5-8ec99f866fb3", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.m1.small", 
      duration: 31536000, 
      fixed_price: 101.0, 
      offering_type: "Medium Utilization", 
      product_description: "redis", 
      recurring_charges: [
      ], 
      reserved_cache_nodes_offering_id: "065c71ae-4a4e-4f1e-bebf-37525f4c6cb2", 
      usage_price: 0.023, 
    }, 
    {
      cache_node_type: "cache.m1.medium", 
      duration: 94608000, 
      fixed_price: 314.0, 
      offering_type: "Medium Utilization", 
      product_description: "memcached", 
      recurring_charges: [
      ], 
      reserved_cache_nodes_offering_id: "06774b12-7f5e-48c1-907a-f286c63f327d", 
      usage_price: 0.034, 
    }, 
    {
      cache_node_type: "cache.m2.xlarge", 
      duration: 31536000, 
      fixed_price: 163.0, 
      offering_type: "Light Utilization", 
      product_description: "memcached", 
      recurring_charges: [
      ], 
      reserved_cache_nodes_offering_id: "0924ac6b-847f-4761-ba6b-4290b2adf719", 
      usage_price: 0.137, 
    }, 
    {
      cache_node_type: "cache.m2.xlarge", 
      duration: 94608000, 
      fixed_price: 719.0, 
      offering_type: "Heavy Utilization", 
      product_description: "redis", 
      recurring_charges: [
        {
          recurring_charge_amount: 0.049, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "09eeb126-69b6-4d3f-8f94-ca3510629f53", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.r3.2xlarge", 
      duration: 94608000, 
      fixed_price: 4132.0, 
      offering_type: "Heavy Utilization", 
      product_description: "redis", 
      recurring_charges: [
        {
          recurring_charge_amount: 0.182, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "0a516ad8-557f-4310-9dd0-2448c2ff4d62", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.c1.xlarge", 
      duration: 94608000, 
      fixed_price: 875.0, 
      offering_type: "Light Utilization", 
      product_description: "memcached", 
      recurring_charges: [
      ], 
      reserved_cache_nodes_offering_id: "0b0c1cc5-2177-4150-95d7-c67ec34dcb19", 
      usage_price: 0.363, 
    }, 
    {
      cache_node_type: "cache.m4.10xlarge", 
      duration: 94608000, 
      fixed_price: 12483.0, 
      offering_type: "Heavy Utilization", 
      product_description: "memcached", 
      recurring_charges: [
        {
          recurring_charge_amount: 0.76, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "0c2b139b-1cff-43d0-8fba-0c753f9b1950", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.c1.xlarge", 
      duration: 31536000, 
      fixed_price: 1620.0, 
      offering_type: "Heavy Utilization", 
      product_description: "memcached", 
      recurring_charges: [
        {
          recurring_charge_amount: 0.207, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "0c52115b-38cb-47a2-8dbc-e02e40b6a13f", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.m2.4xlarge", 
      duration: 94608000, 
      fixed_price: 2381.0, 
      offering_type: "Medium Utilization", 
      product_description: "redis", 
      recurring_charges: [
      ], 
      reserved_cache_nodes_offering_id: "12fcb19c-5416-4e1d-934f-28f1e2cb8599", 
      usage_price: 0.276, 
    }, 
    {
      cache_node_type: "cache.m4.xlarge", 
      duration: 31536000, 
      fixed_price: 616.0, 
      offering_type: "Heavy Utilization", 
      product_description: "memcached", 
      recurring_charges: [
        {
          recurring_charge_amount: 0.112, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "13af20ad-914d-4d8b-9763-fa2e565f3549", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.r3.8xlarge", 
      duration: 94608000, 
      fixed_price: 16528.0, 
      offering_type: "Heavy Utilization", 
      product_description: "memcached", 
      recurring_charges: [
        {
          recurring_charge_amount: 0.729, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "14da3d3f-b526-4dbf-b09b-355578b2a576", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.m1.medium", 
      duration: 94608000, 
      fixed_price: 140.0, 
      offering_type: "Light Utilization", 
      product_description: "redis", 
      recurring_charges: [
      ], 
      reserved_cache_nodes_offering_id: "15d7018c-71fb-4717-8409-4bdcdca18da7", 
      usage_price: 0.052, 
    }, 
    {
      cache_node_type: "cache.m4.4xlarge", 
      duration: 94608000, 
      fixed_price: 4993.0, 
      offering_type: "Heavy Utilization", 
      product_description: "memcached", 
      recurring_charges: [
        {
          recurring_charge_amount: 0.304, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "1ae7ec5f-a76e-49b6-822b-629b1768a13a", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.m3.2xlarge", 
      duration: 31536000, 
      fixed_price: 1772.0, 
      offering_type: "Heavy Utilization", 
      product_description: "redis", 
      recurring_charges: [
        {
          recurring_charge_amount: 0.25, 
          recurring_charge_frequency: "Hourly", 
        }, 
      ], 
      reserved_cache_nodes_offering_id: "1d31242b-3925-48d1-b882-ce03204e6013", 
      usage_price: 0.0, 
    }, 
    {
      cache_node_type: "cache.t1.micro", 
      duration: 31536000, 
      fixed_price: 54.0, 
      offering_type: "Medium Utilization", 
      product_description: "memcached", 
      recurring_charges: [
      ], 
      reserved_cache_nodes_offering_id: "1ef01f5b-94ff-433f-a530-61a56bfc8e7a", 
      usage_price: 0.008, 
    }, 
  ], 
}

Example: DescribeReseredCacheNodeOfferings


# Lists available reserved cache node offerings for cache.r3.large nodes with a 3 year commitment.

resp = client.describe_reserved_cache_nodes_offerings({
  cache_node_type: "cache.r3.large", 
  duration: "3", 
  max_records: 25, 
  offering_type: "Light Utilization", 
  reserved_cache_nodes_offering_id: "", 
})

resp.to_h outputs the following:
{
  marker: "", 
  reserved_cache_nodes_offerings: [
  ], 
}

Example: DescribeReseredCacheNodeOfferings


# Lists available reserved cache node offerings.

resp = client.describe_reserved_cache_nodes_offerings({
  cache_node_type: "", 
  duration: "", 
  marker: "", 
  max_records: 25, 
  offering_type: "", 
  product_description: "", 
  reserved_cache_nodes_offering_id: "438012d3-4052-4cc7-b2e3-8d3372e0e706", 
})

resp.to_h outputs the following:
{
  marker: "", 
  reserved_cache_nodes_offerings: [
  ], 
}

Request syntax with placeholder values


resp = client.describe_reserved_cache_nodes_offerings({
  reserved_cache_nodes_offering_id: "String",
  cache_node_type: "String",
  duration: "String",
  product_description: "String",
  offering_type: "String",
  max_records: 1,
  marker: "String",
})

Response structure


resp.marker #=> String
resp.reserved_cache_nodes_offerings #=> Array
resp.reserved_cache_nodes_offerings[0].reserved_cache_nodes_offering_id #=> String
resp.reserved_cache_nodes_offerings[0].cache_node_type #=> String
resp.reserved_cache_nodes_offerings[0].duration #=> Integer
resp.reserved_cache_nodes_offerings[0].fixed_price #=> Float
resp.reserved_cache_nodes_offerings[0].usage_price #=> Float
resp.reserved_cache_nodes_offerings[0].product_description #=> String
resp.reserved_cache_nodes_offerings[0].offering_type #=> String
resp.reserved_cache_nodes_offerings[0].recurring_charges #=> Array
resp.reserved_cache_nodes_offerings[0].recurring_charges[0].recurring_charge_amount #=> Float
resp.reserved_cache_nodes_offerings[0].recurring_charges[0].recurring_charge_frequency #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :reserved_cache_nodes_offering_id (String) —

    The offering identifier filter value. Use this parameter to show only the available offering that matches the specified reservation identifier.

    Example: ‘438012d3-4052-4cc7-b2e3-8d3372e0e706`

  • :cache_node_type (String) —

    The cache node type filter value. Use this parameter to show only the available offerings matching the specified cache node type.

    The following node types are supported by ElastiCache. Generally speaking, the current generation types provide more memory and computational power at lower cost when compared to their equivalent previous generation counterparts.

    • General purpose:

      • Current generation:

        **T2 node types:** ‘cache.t2.micro`, `cache.t2.small`, `cache.t2.medium`

        **M3 node types:** ‘cache.m3.medium`, `cache.m3.large`, `cache.m3.xlarge`, `cache.m3.2xlarge`

        **M4 node types:** ‘cache.m4.large`, `cache.m4.xlarge`, `cache.m4.2xlarge`, `cache.m4.4xlarge`, `cache.m4.10xlarge`

      • Previous generation: (not recommended)

        **T1 node types:** ‘cache.t1.micro`

        **M1 node types:** ‘cache.m1.small`, `cache.m1.medium`, `cache.m1.large`, `cache.m1.xlarge`

    • Compute optimized:

      • Previous generation: (not recommended)

        **C1 node types:** ‘cache.c1.xlarge`

    • Memory optimized:

      • Current generation:

        **R3 node types:** ‘cache.r3.large`, `cache.r3.xlarge`, `cache.r3.2xlarge`, `cache.r3.4xlarge`, `cache.r3.8xlarge`

        **R4 node types;** ‘cache.r4.large`, `cache.r4.xlarge`, `cache.r4.2xlarge`, `cache.r4.4xlarge`, `cache.r4.8xlarge`, `cache.r4.16xlarge`

      • Previous generation: (not recommended)

        **M2 node types:** ‘cache.m2.xlarge`, `cache.m2.2xlarge`, `cache.m2.4xlarge`

    Notes:

    • All T2 instances are created in an Amazon Virtual Private Cloud (Amazon VPC).

    • Redis (cluster mode disabled): Redis backup/restore is not supported on T1 and T2 instances.

    • Redis (cluster mode enabled): Backup/restore is not supported on T1 instances.

    • Redis Append-only files (AOF) functionality is not supported for T1 or T2 instances.

    For a complete listing of node types and specifications, see:

    • Amazon ElastiCache Product Features and Details][1
    • Cache Node Type-Specific Parameters for Memcached][2
    • Cache Node Type-Specific Parameters for Redis][3

    [1]: aws.amazon.com/elasticache/details [2]: docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/ParameterGroups.Memcached.html#ParameterGroups.Memcached.NodeSpecific [3]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/ParameterGroups.Redis.html#ParameterGroups.Redis.NodeSpecific

  • :duration (String) —

    Duration filter value, specified in years or seconds. Use this parameter to show only reservations for a given duration.

    Valid Values: ‘1 | 3 | 31536000 | 94608000`

  • :product_description (String) —

    The product description filter value. Use this parameter to show only the available offerings matching the specified product description.

  • :offering_type (String) —

    The offering type filter value. Use this parameter to show only the available offerings matching the specified offering type.

    Valid Values: ‘“Light Utilization”|“Medium Utilization”|“Heavy Utilization”`

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 100

    Constraints: minimum 20; maximum 100.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 5597

def describe_reserved_cache_nodes_offerings(params = {}, options = {})
  req = build_request(:describe_reserved_cache_nodes_offerings, params)
  req.send_request(options)
end

#describe_snapshots(params = {}) ⇒ Types::DescribeSnapshotsListMessage

Returns information about cluster or replication group snapshots. By default, ‘DescribeSnapshots` lists all of your snapshots; it can optionally describe a single snapshot, or just the snapshots associated with a particular cache cluster.

<note markdown=“1”> This operation is valid for Redis only.

</note>

Examples:

Example: DescribeSnapshots


# Returns information about the snapshot mysnapshot. By default.

resp = client.describe_snapshots({
  snapshot_name: "snapshot-20161212", 
})

resp.to_h outputs the following:
{
  marker: "", 
  snapshots: [
    {
      auto_minor_version_upgrade: true, 
      cache_cluster_create_time: Time.parse("2016-12-21T22:27:12.543Z"), 
      cache_cluster_id: "my-redis5", 
      cache_node_type: "cache.m3.large", 
      cache_parameter_group_name: "default.redis3.2", 
      cache_subnet_group_name: "default", 
      engine: "redis", 
      engine_version: "3.2.4", 
      node_snapshots: [
        {
          cache_node_create_time: Time.parse("2016-12-21T22:27:12.543Z"), 
          cache_node_id: "0001", 
          cache_size: "3 MB", 
          snapshot_create_time: Time.parse("2016-12-21T22:30:26Z"), 
        }, 
      ], 
      num_cache_nodes: 1, 
      port: 6379, 
      preferred_availability_zone: "us-east-1c", 
      preferred_maintenance_window: "fri:05:30-fri:06:30", 
      snapshot_name: "snapshot-20161212", 
      snapshot_retention_limit: 7, 
      snapshot_source: "manual", 
      snapshot_status: "available", 
      snapshot_window: "10:00-11:00", 
      vpc_id: "vpc-91280df6", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_snapshots({
  replication_group_id: "String",
  cache_cluster_id: "String",
  snapshot_name: "String",
  snapshot_source: "String",
  marker: "String",
  max_records: 1,
  show_node_group_config: false,
})

Response structure


resp.marker #=> String
resp.snapshots #=> Array
resp.snapshots[0].snapshot_name #=> String
resp.snapshots[0].replication_group_id #=> String
resp.snapshots[0].replication_group_description #=> String
resp.snapshots[0].cache_cluster_id #=> String
resp.snapshots[0].snapshot_status #=> String
resp.snapshots[0].snapshot_source #=> String
resp.snapshots[0].cache_node_type #=> String
resp.snapshots[0].engine #=> String
resp.snapshots[0].engine_version #=> String
resp.snapshots[0].num_cache_nodes #=> Integer
resp.snapshots[0].preferred_availability_zone #=> String
resp.snapshots[0].cache_cluster_create_time #=> Time
resp.snapshots[0].preferred_maintenance_window #=> String
resp.snapshots[0].topic_arn #=> String
resp.snapshots[0].port #=> Integer
resp.snapshots[0].cache_parameter_group_name #=> String
resp.snapshots[0].cache_subnet_group_name #=> String
resp.snapshots[0].vpc_id #=> String
resp.snapshots[0].auto_minor_version_upgrade #=> Boolean
resp.snapshots[0].snapshot_retention_limit #=> Integer
resp.snapshots[0].snapshot_window #=> String
resp.snapshots[0].num_node_groups #=> Integer
resp.snapshots[0].automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.snapshots[0].node_snapshots #=> Array
resp.snapshots[0].node_snapshots[0].cache_cluster_id #=> String
resp.snapshots[0].node_snapshots[0].node_group_id #=> String
resp.snapshots[0].node_snapshots[0].cache_node_id #=> String
resp.snapshots[0].node_snapshots[0].node_group_configuration.node_group_id #=> String
resp.snapshots[0].node_snapshots[0].node_group_configuration.slots #=> String
resp.snapshots[0].node_snapshots[0].node_group_configuration.replica_count #=> Integer
resp.snapshots[0].node_snapshots[0].node_group_configuration.primary_availability_zone #=> String
resp.snapshots[0].node_snapshots[0].node_group_configuration.replica_availability_zones #=> Array
resp.snapshots[0].node_snapshots[0].node_group_configuration.replica_availability_zones[0] #=> String
resp.snapshots[0].node_snapshots[0].cache_size #=> String
resp.snapshots[0].node_snapshots[0].cache_node_create_time #=> Time
resp.snapshots[0].node_snapshots[0].snapshot_create_time #=> Time

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :replication_group_id (String) —

    A user-supplied replication group identifier. If this parameter is specified, only snapshots associated with that specific replication group are described.

  • :cache_cluster_id (String) —

    A user-supplied cluster identifier. If this parameter is specified, only snapshots associated with that specific cluster are described.

  • :snapshot_name (String) —

    A user-supplied name of the snapshot. If this parameter is specified, only this snapshot are described.

  • :snapshot_source (String) —

    If set to ‘system`, the output shows snapshots that were automatically created by ElastiCache. If set to `user` the output shows snapshots that were manually created. If omitted, the output shows both automatically and manually created snapshots.

  • :marker (String) —

    An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by ‘MaxRecords`.

  • :max_records (Integer) —

    The maximum number of records to include in the response. If more records exist than the specified ‘MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.

    Default: 50

    Constraints: minimum 20; maximum 50.

  • :show_node_group_config (Boolean) —

    A Boolean value which if true, the node group (shard) configuration is included in the snapshot description.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 5756

def describe_snapshots(params = {}, options = {})
  req = build_request(:describe_snapshots, params)
  req.send_request(options)
end

#increase_replica_count(params = {}) ⇒ Types::IncreaseReplicaCountResult

Dynamically increases the number of replics in a Redis (cluster mode disabled) replication group or the number of replica nodes in one or more node groups (shards) of a Redis (cluster mode enabled) replication group. This operation is performed with no cluster down time.

Examples:

Request syntax with placeholder values


resp = client.increase_replica_count({
  replication_group_id: "String", # required
  new_replica_count: 1,
  replica_configuration: [
    {
      node_group_id: "AllowedNodeGroupId", # required
      new_replica_count: 1, # required
      preferred_availability_zones: ["String"],
    },
  ],
  apply_immediately: false, # required
})

Response structure


resp.replication_group.replication_group_id #=> String
resp.replication_group.description #=> String
resp.replication_group.status #=> String
resp.replication_group.pending_modified_values.primary_cluster_id #=> String
resp.replication_group.pending_modified_values.automatic_failover_status #=> String, one of "enabled", "disabled"
resp.replication_group.pending_modified_values.resharding.slot_migration.progress_percentage #=> Float
resp.replication_group.member_clusters #=> Array
resp.replication_group.member_clusters[0] #=> String
resp.replication_group.node_groups #=> Array
resp.replication_group.node_groups[0].node_group_id #=> String
resp.replication_group.node_groups[0].status #=> String
resp.replication_group.node_groups[0].primary_endpoint.address #=> String
resp.replication_group.node_groups[0].primary_endpoint.port #=> Integer
resp.replication_group.node_groups[0].slots #=> String
resp.replication_group.node_groups[0].node_group_members #=> Array
resp.replication_group.node_groups[0].node_group_members[0].cache_cluster_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].cache_node_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.address #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.port #=> Integer
resp.replication_group.node_groups[0].node_group_members[0].preferred_availability_zone #=> String
resp.replication_group.node_groups[0].node_group_members[0].current_role #=> String
resp.replication_group.snapshotting_cluster_id #=> String
resp.replication_group.automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.replication_group.configuration_endpoint.address #=> String
resp.replication_group.configuration_endpoint.port #=> Integer
resp.replication_group.snapshot_retention_limit #=> Integer
resp.replication_group.snapshot_window #=> String
resp.replication_group.cluster_enabled #=> Boolean
resp.replication_group.cache_node_type #=> String
resp.replication_group.auth_token_enabled #=> Boolean
resp.replication_group.transit_encryption_enabled #=> Boolean
resp.replication_group.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :replication_group_id (required, String) —

    The id of the replication group to which you want to add replica nodes.

  • :new_replica_count (Integer) —

    The number of read replica nodes you want at the completion of this operation. For Redis (cluster mode disabled) replication groups, this is the number of replica nodes in the replication group. For Redis (cluster mode enabled) replication groups, this is the number of replica nodes in each of the replication group’s node groups.

  • :replica_configuration (Array<Types::ConfigureShard>) —

    A list of ‘ConfigureShard` objects that can be used to configure each shard in a Redis (cluster mode enabled) replication group. The `ConfigureShard` has three members: `NewReplicaCount`, `NodeGroupId`, and `PreferredAvailabilityZones`.

  • :apply_immediately (required, Boolean) —

    If ‘True`, the number of replica nodes is increased immediately. If `False`, the number of replica nodes is increased during the next maintenance window.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 5847

def increase_replica_count(params = {}, options = {})
  req = build_request(:increase_replica_count, params)
  req.send_request(options)
end

#list_allowed_node_type_modifications(params = {}) ⇒ Types::AllowedNodeTypeModificationsMessage

Lists all available node types that you can scale your Redis cluster’s or replication group’s current node type up to.

When you use the ‘ModifyCacheCluster` or `ModifyReplicationGroup` operations to scale up your cluster or replication group, the value of the `CacheNodeType` parameter must be one of the node types returned by this operation.

Examples:

Example: ListAllowedNodeTypeModifications


# Lists all available node types that you can scale your Redis cluster's or replication group's current node type up to.

resp = client.list_allowed_node_type_modifications({
  replication_group_id: "myreplgroup", 
})

resp.to_h outputs the following:
{
  scale_up_modifications: [
    "cache.m4.10xlarge", 
    "cache.m4.2xlarge", 
    "cache.m4.4xlarge", 
    "cache.m4.xlarge", 
    "cache.r3.2xlarge", 
    "cache.r3.4xlarge", 
    "cache.r3.8xlarge", 
    "cache.r3.xlarge", 
  ], 
}

Example: ListAllowedNodeTypeModifications


# Lists all available node types that you can scale your Redis cluster's or replication group's current node type up to.

resp = client.list_allowed_node_type_modifications({
  cache_cluster_id: "mycluster", 
})

resp.to_h outputs the following:
{
  scale_up_modifications: [
  ], 
}

Request syntax with placeholder values


resp = client.list_allowed_node_type_modifications({
  cache_cluster_id: "String",
  replication_group_id: "String",
})

Response structure


resp.scale_up_modifications #=> Array
resp.scale_up_modifications[0] #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_cluster_id (String) —

    The name of the cluster you want to scale up to a larger node instanced type. ElastiCache uses the cluster id to identify the current node type of this cluster and from that to create a list of node types you can scale up to.

    You must provide a value for either the ‘CacheClusterId` or the `ReplicationGroupId`.

  • :replication_group_id (String) —

    The name of the replication group want to scale up to a larger node type. ElastiCache uses the replication group id to identify the current node type being used by this replication group, and from that to create a list of node types you can scale up to.

    You must provide a value for either the ‘CacheClusterId` or the `ReplicationGroupId`.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 5935

def list_allowed_node_type_modifications(params = {}, options = {})
  req = build_request(:list_allowed_node_type_modifications, params)
  req.send_request(options)
end

#list_tags_for_resource(params = {}) ⇒ Types::TagListMessage

Lists all cost allocation tags currently on the named resource. A ‘cost allocation tag` is a key-value pair where the key is case-sensitive and the value is optional. You can use cost allocation tags to categorize and track your AWS costs.

If the cluster is not in the available state, ‘ListTagsForResource` returns an error.

You can have a maximum of 50 cost allocation tags on an ElastiCache resource. For more information, see [Monitoring Costs with Tags].

[1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Tagging.html

Examples:

Example: ListTagsForResource


# Lists all cost allocation tags currently on the named resource. A cost allocation tag is a key-value pair where the key
# is case-sensitive and the value is optional. You can use cost allocation tags to categorize and track your AWS costs.

resp = client.list_tags_for_resource({
  resource_name: "arn:aws:elasticache:us-west-2:<my-account-id>:cluster:mycluster", 
})

resp.to_h outputs the following:
{
  tag_list: [
    {
      key: "APIVersion", 
      value: "20150202", 
    }, 
    {
      key: "Service", 
      value: "ElastiCache", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.list_tags_for_resource({
  resource_name: "String", # required
})

Response structure


resp.tag_list #=> Array
resp.tag_list[0].key #=> String
resp.tag_list[0].value #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :resource_name (required, String) —

    The Amazon Resource Name (ARN) of the resource for which you want the list of tags, for example ‘arn:aws:elasticache:us-west-2:0123456789:cluster:myCluster` or `arn:aws:elasticache:us-west-2:0123456789:snapshot:mySnapshot`.

    For more information about ARNs, see [Amazon Resource Names (ARNs) and AWS Service Namespaces].

    [1]: docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 6012

def list_tags_for_resource(params = {}, options = {})
  req = build_request(:list_tags_for_resource, params)
  req.send_request(options)
end

#modify_cache_cluster(params = {}) ⇒ Types::ModifyCacheClusterResult

Modifies the settings for a cluster. You can use this operation to change one or more cluster configuration parameters by specifying the parameters and the new values.

Examples:

Example: ModifyCacheCluster


# Copies a snapshot to a specified name.

resp = client.modify_cache_cluster({
  apply_immediately: true, 
  cache_cluster_id: "redis-cluster", 
  snapshot_retention_limit: 14, 
})

resp.to_h outputs the following:
{
  cache_cluster: {
    auto_minor_version_upgrade: true, 
    cache_cluster_create_time: Time.parse("2016-12-22T16:27:56.078Z"), 
    cache_cluster_id: "redis-cluster", 
    cache_cluster_status: "available", 
    cache_node_type: "cache.r3.large", 
    cache_parameter_group: {
      cache_node_ids_to_reboot: [
      ], 
      cache_parameter_group_name: "default.redis3.2", 
      parameter_apply_status: "in-sync", 
    }, 
    cache_security_groups: [
    ], 
    cache_subnet_group_name: "default", 
    client_download_landing_page: "https://console.aws.amazon.com/elasticache/home#client-download:", 
    engine: "redis", 
    engine_version: "3.2.4", 
    num_cache_nodes: 1, 
    pending_modified_values: {
    }, 
    preferred_availability_zone: "us-east-1e", 
    preferred_maintenance_window: "fri:09:00-fri:10:00", 
    snapshot_retention_limit: 14, 
    snapshot_window: "07:00-08:00", 
  }, 
}

Request syntax with placeholder values


resp = client.modify_cache_cluster({
  cache_cluster_id: "String", # required
  num_cache_nodes: 1,
  cache_node_ids_to_remove: ["String"],
  az_mode: "single-az", # accepts single-az, cross-az
  new_availability_zones: ["String"],
  cache_security_group_names: ["String"],
  security_group_ids: ["String"],
  preferred_maintenance_window: "String",
  notification_topic_arn: "String",
  cache_parameter_group_name: "String",
  notification_topic_status: "String",
  apply_immediately: false,
  engine_version: "String",
  auto_minor_version_upgrade: false,
  snapshot_retention_limit: 1,
  snapshot_window: "String",
  cache_node_type: "String",
})

Response structure


resp.cache_cluster.cache_cluster_id #=> String
resp.cache_cluster.configuration_endpoint.address #=> String
resp.cache_cluster.configuration_endpoint.port #=> Integer
resp.cache_cluster.client_download_landing_page #=> String
resp.cache_cluster.cache_node_type #=> String
resp.cache_cluster.engine #=> String
resp.cache_cluster.engine_version #=> String
resp.cache_cluster.cache_cluster_status #=> String
resp.cache_cluster.num_cache_nodes #=> Integer
resp.cache_cluster.preferred_availability_zone #=> String
resp.cache_cluster.cache_cluster_create_time #=> Time
resp.cache_cluster.preferred_maintenance_window #=> String
resp.cache_cluster.pending_modified_values.num_cache_nodes #=> Integer
resp.cache_cluster.pending_modified_values.cache_node_ids_to_remove #=> Array
resp.cache_cluster.pending_modified_values.cache_node_ids_to_remove[0] #=> String
resp.cache_cluster.pending_modified_values.engine_version #=> String
resp.cache_cluster.pending_modified_values.cache_node_type #=> String
resp.cache_cluster.notification_configuration.topic_arn #=> String
resp.cache_cluster.notification_configuration.topic_status #=> String
resp.cache_cluster.cache_security_groups #=> Array
resp.cache_cluster.cache_security_groups[0].cache_security_group_name #=> String
resp.cache_cluster.cache_security_groups[0].status #=> String
resp.cache_cluster.cache_parameter_group.cache_parameter_group_name #=> String
resp.cache_cluster.cache_parameter_group.parameter_apply_status #=> String
resp.cache_cluster.cache_parameter_group.cache_node_ids_to_reboot #=> Array
resp.cache_cluster.cache_parameter_group.cache_node_ids_to_reboot[0] #=> String
resp.cache_cluster.cache_subnet_group_name #=> String
resp.cache_cluster.cache_nodes #=> Array
resp.cache_cluster.cache_nodes[0].cache_node_id #=> String
resp.cache_cluster.cache_nodes[0].cache_node_status #=> String
resp.cache_cluster.cache_nodes[0].cache_node_create_time #=> Time
resp.cache_cluster.cache_nodes[0].endpoint.address #=> String
resp.cache_cluster.cache_nodes[0].endpoint.port #=> Integer
resp.cache_cluster.cache_nodes[0].parameter_group_status #=> String
resp.cache_cluster.cache_nodes[0].source_cache_node_id #=> String
resp.cache_cluster.cache_nodes[0].customer_availability_zone #=> String
resp.cache_cluster.auto_minor_version_upgrade #=> Boolean
resp.cache_cluster.security_groups #=> Array
resp.cache_cluster.security_groups[0].security_group_id #=> String
resp.cache_cluster.security_groups[0].status #=> String
resp.cache_cluster.replication_group_id #=> String
resp.cache_cluster.snapshot_retention_limit #=> Integer
resp.cache_cluster.snapshot_window #=> String
resp.cache_cluster.auth_token_enabled #=> Boolean
resp.cache_cluster.transit_encryption_enabled #=> Boolean
resp.cache_cluster.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_cluster_id (required, String) —

    The cluster identifier. This value is stored as a lowercase string.

  • :num_cache_nodes (Integer) —

    The number of cache nodes that the cluster should have. If the value for ‘NumCacheNodes` is greater than the sum of the number of current cache nodes and the number of cache nodes pending creation (which may be zero), more nodes are added. If the value is less than the number of existing cache nodes, nodes are removed. If the value is equal to the number of current cache nodes, any pending add or remove requests are canceled.

    If you are removing cache nodes, you must use the ‘CacheNodeIdsToRemove` parameter to provide the IDs of the specific cache nodes to remove.

    For clusters running Redis, this value must be 1. For clusters running Memcached, this value must be between 1 and 20.

    <note markdown=“1”> Adding or removing Memcached cache nodes can be applied immediately or as a pending operation (see ‘ApplyImmediately`).

    A pending operation to modify the number of cache nodes in a cluster

    during its maintenance window, whether by adding or removing nodes in accordance with the scale out architecture, is not queued. The customer’s latest request to add or remove nodes to the cluster overrides any previous pending operations to modify the number of cache nodes in the cluster. For example, a request to remove 2 nodes would override a previous pending operation to remove 3 nodes. Similarly, a request to add 2 nodes would override a previous pending operation to remove 3 nodes and vice versa. As Memcached cache nodes may now be provisioned in different Availability Zones with flexible cache node placement, a request to add nodes does not automatically override a previous pending operation to add nodes. The customer can modify the previous pending operation to add more nodes or explicitly cancel the pending request and retry the new request. To cancel pending operations to modify the number of cache nodes in a cluster, use the ‘ModifyCacheCluster` request and set `NumCacheNodes` equal to the number of cache nodes currently in the cluster.

    </note>
  • :cache_node_ids_to_remove (Array<String>) —

    A list of cache node IDs to be removed. A node ID is a numeric identifier (0001, 0002, etc.). This parameter is only valid when ‘NumCacheNodes` is less than the existing number of cache nodes. The number of cache node IDs supplied in this parameter must match the difference between the existing number of cache nodes in the cluster or pending cache nodes, whichever is greater, and the value of `NumCacheNodes` in the request.

    For example: If you have 3 active cache nodes, 7 pending cache nodes, and the number of cache nodes in this ‘ModifyCacheCluster` call is 5, you must list 2 (7 - 5) cache node IDs to remove.

  • :az_mode (String) —

    Specifies whether the new nodes in this Memcached cluster are all created in a single Availability Zone or created across multiple Availability Zones.

    Valid values: ‘single-az` | `cross-az`.

    This option is only supported for Memcached clusters.

    <note markdown=“1”> You cannot specify ‘single-az` if the Memcached cluster already has cache nodes in different Availability Zones. If `cross-az` is specified, existing Memcached nodes remain in their current Availability Zone.

    Only newly created nodes are located in different Availability Zones.

    For instructions on how to move existing Memcached nodes to different Availability Zones, see the **Availability Zone Considerations** section of [Cache Node Considerations for Memcached].

    </note>

    [1]: docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/CacheNode.Memcached.html

  • :new_availability_zones (Array<String>) —

    The list of Availability Zones where the new Memcached cache nodes are created.

    This parameter is only valid when ‘NumCacheNodes` in the request is greater than the sum of the number of active cache nodes and the number of cache nodes pending creation (which may be zero). The number of Availability Zones supplied in this list must match the cache nodes being added in this request.

    This option is only supported on Memcached clusters.

    Scenarios:

    • **Scenario 1:** You have 3 active nodes and wish to add 2 nodes. Specify ‘NumCacheNodes=5` (3 + 2) and optionally specify two Availability Zones for the two new nodes.

    • **Scenario 2:** You have 3 active nodes and 2 nodes pending creation (from the scenario 1 call) and want to add 1 more node. Specify ‘NumCacheNodes=6` ((3 + 2) + 1) and optionally specify an Availability Zone for the new node.

    • **Scenario 3:** You want to cancel all pending operations. Specify ‘NumCacheNodes=3` to cancel all pending operations.

    The Availability Zone placement of nodes pending creation cannot be modified. If you wish to cancel any nodes pending creation, add 0 nodes by setting ‘NumCacheNodes` to the number of current nodes.

    If ‘cross-az` is specified, existing Memcached nodes remain in their current Availability Zone. Only newly created nodes can be located in different Availability Zones. For guidance on how to move existing Memcached nodes to different Availability Zones, see the **Availability Zone Considerations** section of [Cache Node Considerations for Memcached].

    **Impact of new add/remove requests upon pending requests**

    • Scenario-1

      • Pending Action: Delete

      • New Request: Delete

      • Result: The new delete, pending or immediate, replaces the pending delete.

    • Scenario-2

      • Pending Action: Delete

      • New Request: Create

      • Result: The new create, pending or immediate, replaces the pending delete.

    • Scenario-3

      • Pending Action: Create

      • New Request: Delete

      • Result: The new delete, pending or immediate, replaces the pending create.

    • Scenario-4

      • Pending Action: Create

      • New Request: Create

      • Result: The new create is added to the pending create.

        Important: If the new create request is **Apply Immediately - Yes**, all creates are performed immediately. If the new create request is **Apply Immediately - No**, all creates are pending.

    [1]: docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/CacheNode.Memcached.html

  • :cache_security_group_names (Array<String>) —

    A list of cache security group names to authorize on this cluster. This change is asynchronously applied as soon as possible.

    You can use this parameter only with clusters that are created outside of an Amazon Virtual Private Cloud (Amazon VPC).

    Constraints: Must contain no more than 255 alphanumeric characters. Must not be “Default”.

  • :security_group_ids (Array<String>) —

    Specifies the VPC Security Groups associated with the cluster.

    This parameter can be used only with clusters that are created in an Amazon Virtual Private Cloud (Amazon VPC).

  • :preferred_maintenance_window (String) —

    Specifies the weekly time range during which maintenance on the cluster is performed. It is specified as a range in the format ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC). The minimum maintenance window is a 60 minute period.

    Valid values for ‘ddd` are:

    • ‘sun`

    • ‘mon`

    • ‘tue`

    • ‘wed`

    • ‘thu`

    • ‘fri`

    • ‘sat`

    Example: ‘sun:23:00-mon:01:30`

  • :notification_topic_arn (String) —

    The Amazon Resource Name (ARN) of the Amazon SNS topic to which notifications are sent.

    <note markdown=“1”> The Amazon SNS topic owner must be same as the cluster owner.

    </note>
  • :cache_parameter_group_name (String) —

    The name of the cache parameter group to apply to this cluster. This change is asynchronously applied as soon as possible for parameters when the ‘ApplyImmediately` parameter is specified as `true` for this request.

  • :notification_topic_status (String) —

    The status of the Amazon SNS notification topic. Notifications are sent only if the status is ‘active`.

    Valid values: ‘active` | `inactive`

  • :apply_immediately (Boolean) —

    If ‘true`, this parameter causes the modifications in this request and any pending modifications to be applied, asynchronously and as soon as possible, regardless of the `PreferredMaintenanceWindow` setting for the cluster.

    If ‘false`, changes to the cluster are applied on the next maintenance reboot, or the next failure reboot, whichever occurs first.

    If you perform a ‘ModifyCacheCluster` before a pending modification is applied, the pending modification is replaced by the newer modification.

    Valid values: ‘true` | `false`

    Default: ‘false`

  • :engine_version (String) —

    The upgraded version of the cache engine to be run on the cache nodes.

    Important: You can upgrade to a newer engine version (see [Selecting a Cache Engine and Version]), but you cannot downgrade to an earlier engine version. If you want to use an earlier engine version, you must delete the existing cluster and create it anew with the earlier engine version.

    [1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/SelectEngine.html#VersionManagement

  • :auto_minor_version_upgrade (Boolean) —

    This parameter is currently disabled.

  • :snapshot_retention_limit (Integer) —

    The number of days for which ElastiCache retains automatic cluster snapshots before deleting them. For example, if you set ‘SnapshotRetentionLimit` to 5, a snapshot that was taken today is retained for 5 days before being deleted.

    <note markdown=“1”> If the value of ‘SnapshotRetentionLimit` is set to zero (0), backups are turned off.

    </note>
  • :snapshot_window (String) —

    The daily time range (in UTC) during which ElastiCache begins taking a daily snapshot of your cluster.

  • :cache_node_type (String) —

    A valid cache node type that you want to scale this cluster up to.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 6414

def modify_cache_cluster(params = {}, options = {})
  req = build_request(:modify_cache_cluster, params)
  req.send_request(options)
end

#modify_cache_parameter_group(params = {}) ⇒ Types::CacheParameterGroupNameMessage

Modifies the parameters of a cache parameter group. You can modify up to 20 parameters in a single request by submitting a list parameter name and value pairs.

Examples:

Example: ModifyCacheParameterGroup


# Modifies one or more parameter values in the specified parameter group. You cannot modify any default parameter group.

resp = client.modify_cache_parameter_group({
  cache_parameter_group_name: "custom-mem1-4", 
  parameter_name_values: [
    {
      parameter_name: "binding_protocol", 
      parameter_value: "ascii", 
    }, 
    {
      parameter_name: "chunk_size", 
      parameter_value: "96", 
    }, 
  ], 
})

resp.to_h outputs the following:
{
  cache_parameter_group_name: "custom-mem1-4", 
}

Request syntax with placeholder values


resp = client.modify_cache_parameter_group({
  cache_parameter_group_name: "String", # required
  parameter_name_values: [ # required
    {
      parameter_name: "String",
      parameter_value: "String",
    },
  ],
})

Response structure


resp.cache_parameter_group_name #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_parameter_group_name (required, String) —

    The name of the cache parameter group to modify.

  • :parameter_name_values (required, Array<Types::ParameterNameValue>) —

    An array of parameter names and values for the parameter update. You must supply at least one parameter name and value; subsequent arguments are optional. A maximum of 20 parameters may be modified per request.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 6480

def modify_cache_parameter_group(params = {}, options = {})
  req = build_request(:modify_cache_parameter_group, params)
  req.send_request(options)
end

#modify_cache_subnet_group(params = {}) ⇒ Types::ModifyCacheSubnetGroupResult

Modifies an existing cache subnet group.

Examples:

Example: ModifyCacheSubnetGroup


# Modifies an existing ElastiCache subnet group.

resp = client.modify_cache_subnet_group({
  cache_subnet_group_name: "my-sn-grp", 
  subnet_ids: [
    "subnet-bcde2345", 
  ], 
})

resp.to_h outputs the following:
{
  cache_subnet_group: {
    cache_subnet_group_description: "My subnet group.", 
    cache_subnet_group_name: "my-sn-grp", 
    subnets: [
      {
        subnet_availability_zone: {
          name: "us-east-1c", 
        }, 
        subnet_identifier: "subnet-a1b2c3d4", 
      }, 
      {
        subnet_availability_zone: {
          name: "us-east-1e", 
        }, 
        subnet_identifier: "subnet-1a2b3c4d", 
      }, 
      {
        subnet_availability_zone: {
          name: "us-east-1e", 
        }, 
        subnet_identifier: "subnet-bcde2345", 
      }, 
      {
        subnet_availability_zone: {
          name: "us-east-1c", 
        }, 
        subnet_identifier: "subnet-1234abcd", 
      }, 
      {
        subnet_availability_zone: {
          name: "us-east-1b", 
        }, 
        subnet_identifier: "subnet-abcd1234", 
      }, 
    ], 
    vpc_id: "vpc-91280df6", 
  }, 
}

Request syntax with placeholder values


resp = client.modify_cache_subnet_group({
  cache_subnet_group_name: "String", # required
  cache_subnet_group_description: "String",
  subnet_ids: ["String"],
})

Response structure


resp.cache_subnet_group.cache_subnet_group_name #=> String
resp.cache_subnet_group.cache_subnet_group_description #=> String
resp.cache_subnet_group.vpc_id #=> String
resp.cache_subnet_group.subnets #=> Array
resp.cache_subnet_group.subnets[0].subnet_identifier #=> String
resp.cache_subnet_group.subnets[0].subnet_availability_zone.name #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_subnet_group_name (required, String) —

    The name for the cache subnet group. This value is stored as a lowercase string.

    Constraints: Must contain no more than 255 alphanumeric characters or hyphens.

    Example: ‘mysubnetgroup`

  • :cache_subnet_group_description (String) —

    A description of the cache subnet group.

  • :subnet_ids (Array<String>) —

    The EC2 subnet IDs for the cache subnet group.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 6580

def modify_cache_subnet_group(params = {}, options = {})
  req = build_request(:modify_cache_subnet_group, params)
  req.send_request(options)
end

#modify_replication_group(params = {}) ⇒ Types::ModifyReplicationGroupResult

Modifies the settings for a replication group.

For Redis (cluster mode enabled) clusters, this operation cannot be used to change a cluster’s node type or engine version. For more information, see:

  • [Scaling for Amazon ElastiCache for Redis—Redis (cluster mode enabled)] in the ElastiCache User Guide

  • ModifyReplicationGroupShardConfiguration][2

    in the ElastiCache API

    Reference

<note markdown=“1”> This operation is valid for Redis only.

</note>

[1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/scaling-redis-cluster-mode-enabled.html [2]: docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_ModifyReplicationGroupShardConfiguration.html

Examples:

Example: ModifyReplicationGroup


resp = client.modify_replication_group({
  apply_immediately: true, 
  replication_group_description: "Modified replication group", 
  replication_group_id: "my-redis-rg", 
  snapshot_retention_limit: 30, 
  snapshotting_cluster_id: "my-redis-rg-001", 
})

resp.to_h outputs the following:
{
  replication_group: {
    automatic_failover: "enabled", 
    description: "Modified replication group", 
    member_clusters: [
      "my-redis-rg-001", 
      "my-redis-rg-002", 
      "my-redis-rg-003", 
    ], 
    node_groups: [
      {
        node_group_id: "0001", 
        node_group_members: [
          {
            cache_cluster_id: "my-redis-rg-001", 
            cache_node_id: "0001", 
            current_role: "primary", 
            preferred_availability_zone: "us-east-1b", 
            read_endpoint: {
              address: "my-redis-rg-001.abcdef.0001.use1.cache.amazonaws.com", 
              port: 6379, 
            }, 
          }, 
          {
            cache_cluster_id: "my-redis-rg-002", 
            cache_node_id: "0001", 
            current_role: "replica", 
            preferred_availability_zone: "us-east-1a", 
            read_endpoint: {
              address: "my-redis-rg-002.abcdef.0001.use1.cache.amazonaws.com", 
              port: 6379, 
            }, 
          }, 
          {
            cache_cluster_id: "my-redis-rg-003", 
            cache_node_id: "0001", 
            current_role: "replica", 
            preferred_availability_zone: "us-east-1c", 
            read_endpoint: {
              address: "my-redis-rg-003.abcdef.0001.use1.cache.amazonaws.com", 
              port: 6379, 
            }, 
          }, 
        ], 
        primary_endpoint: {
          address: "my-redis-rg.abcdef.ng.0001.use1.cache.amazonaws.com", 
          port: 6379, 
        }, 
        status: "available", 
      }, 
    ], 
    pending_modified_values: {
    }, 
    replication_group_id: "my-redis-rg", 
    snapshotting_cluster_id: "my-redis-rg-002", 
    status: "available", 
  }, 
}

Request syntax with placeholder values


resp = client.modify_replication_group({
  replication_group_id: "String", # required
  replication_group_description: "String",
  primary_cluster_id: "String",
  snapshotting_cluster_id: "String",
  automatic_failover_enabled: false,
  cache_security_group_names: ["String"],
  security_group_ids: ["String"],
  preferred_maintenance_window: "String",
  notification_topic_arn: "String",
  cache_parameter_group_name: "String",
  notification_topic_status: "String",
  apply_immediately: false,
  engine_version: "String",
  auto_minor_version_upgrade: false,
  snapshot_retention_limit: 1,
  snapshot_window: "String",
  cache_node_type: "String",
  node_group_id: "String",
})

Response structure


resp.replication_group.replication_group_id #=> String
resp.replication_group.description #=> String
resp.replication_group.status #=> String
resp.replication_group.pending_modified_values.primary_cluster_id #=> String
resp.replication_group.pending_modified_values.automatic_failover_status #=> String, one of "enabled", "disabled"
resp.replication_group.pending_modified_values.resharding.slot_migration.progress_percentage #=> Float
resp.replication_group.member_clusters #=> Array
resp.replication_group.member_clusters[0] #=> String
resp.replication_group.node_groups #=> Array
resp.replication_group.node_groups[0].node_group_id #=> String
resp.replication_group.node_groups[0].status #=> String
resp.replication_group.node_groups[0].primary_endpoint.address #=> String
resp.replication_group.node_groups[0].primary_endpoint.port #=> Integer
resp.replication_group.node_groups[0].slots #=> String
resp.replication_group.node_groups[0].node_group_members #=> Array
resp.replication_group.node_groups[0].node_group_members[0].cache_cluster_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].cache_node_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.address #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.port #=> Integer
resp.replication_group.node_groups[0].node_group_members[0].preferred_availability_zone #=> String
resp.replication_group.node_groups[0].node_group_members[0].current_role #=> String
resp.replication_group.snapshotting_cluster_id #=> String
resp.replication_group.automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.replication_group.configuration_endpoint.address #=> String
resp.replication_group.configuration_endpoint.port #=> Integer
resp.replication_group.snapshot_retention_limit #=> Integer
resp.replication_group.snapshot_window #=> String
resp.replication_group.cluster_enabled #=> Boolean
resp.replication_group.cache_node_type #=> String
resp.replication_group.auth_token_enabled #=> Boolean
resp.replication_group.transit_encryption_enabled #=> Boolean
resp.replication_group.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :replication_group_id (required, String) —

    The identifier of the replication group to modify.

  • :replication_group_description (String) —

    A description for the replication group. Maximum length is 255 characters.

  • :primary_cluster_id (String) —

    For replication groups with a single primary, if this parameter is specified, ElastiCache promotes the specified cluster in the specified replication group to the primary role. The nodes of all other clusters in the replication group are read replicas.

  • :snapshotting_cluster_id (String) —

    The cluster ID that is used as the daily snapshot source for the replication group. This parameter cannot be set for Redis (cluster mode enabled) replication groups.

  • :automatic_failover_enabled (Boolean) —

    Determines whether a read replica is automatically promoted to read/write primary if the existing primary encounters a failure.

    Valid values: ‘true` | `false`

    Amazon ElastiCache for Redis does not support Multi-AZ with automatic failover on:

    • Redis versions earlier than 2.8.6.

    • Redis (cluster mode disabled): T1 and T2 cache node types.

    • Redis (cluster mode enabled): T1 node types.

  • :cache_security_group_names (Array<String>) —

    A list of cache security group names to authorize for the clusters in this replication group. This change is asynchronously applied as soon as possible.

    This parameter can be used only with replication group containing clusters running outside of an Amazon Virtual Private Cloud (Amazon VPC).

    Constraints: Must contain no more than 255 alphanumeric characters. Must not be ‘Default`.

  • :security_group_ids (Array<String>) —

    Specifies the VPC Security Groups associated with the clusters in the replication group.

    This parameter can be used only with replication group containing clusters running in an Amazon Virtual Private Cloud (Amazon VPC).

  • :preferred_maintenance_window (String) —

    Specifies the weekly time range during which maintenance on the cluster is performed. It is specified as a range in the format ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC). The minimum maintenance window is a 60 minute period.

    Valid values for ‘ddd` are:

    • ‘sun`

    • ‘mon`

    • ‘tue`

    • ‘wed`

    • ‘thu`

    • ‘fri`

    • ‘sat`

    Example: ‘sun:23:00-mon:01:30`

  • :notification_topic_arn (String) —

    The Amazon Resource Name (ARN) of the Amazon SNS topic to which notifications are sent.

    <note markdown=“1”> The Amazon SNS topic owner must be same as the replication group owner.

    </note>
  • :cache_parameter_group_name (String) —

    The name of the cache parameter group to apply to all of the clusters in this replication group. This change is asynchronously applied as soon as possible for parameters when the ‘ApplyImmediately` parameter is specified as `true` for this request.

  • :notification_topic_status (String) —

    The status of the Amazon SNS notification topic for the replication group. Notifications are sent only if the status is ‘active`.

    Valid values: ‘active` | `inactive`

  • :apply_immediately (Boolean) —

    If ‘true`, this parameter causes the modifications in this request and any pending modifications to be applied, asynchronously and as soon as possible, regardless of the `PreferredMaintenanceWindow` setting for the replication group.

    If ‘false`, changes to the nodes in the replication group are applied on the next maintenance reboot, or the next failure reboot, whichever occurs first.

    Valid values: ‘true` | `false`

    Default: ‘false`

  • :engine_version (String) —

    The upgraded version of the cache engine to be run on the clusters in the replication group.

    Important: You can upgrade to a newer engine version (see [Selecting a Cache Engine and Version]), but you cannot downgrade to an earlier engine version. If you want to use an earlier engine version, you must delete the existing replication group and create it anew with the earlier engine version.

    [1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/SelectEngine.html#VersionManagement

  • :auto_minor_version_upgrade (Boolean) —

    This parameter is currently disabled.

  • :snapshot_retention_limit (Integer) —

    The number of days for which ElastiCache retains automatic node group (shard) snapshots before deleting them. For example, if you set ‘SnapshotRetentionLimit` to 5, a snapshot that was taken today is retained for 5 days before being deleted.

    Important If the value of SnapshotRetentionLimit is set to zero (0), backups are turned off.

  • :snapshot_window (String) —

    The daily time range (in UTC) during which ElastiCache begins taking a daily snapshot of the node group (shard) specified by ‘SnapshottingClusterId`.

    Example: ‘05:00-09:00`

    If you do not specify this parameter, ElastiCache automatically chooses an appropriate time range.

  • :cache_node_type (String) —

    A valid cache node type that you want to scale this replication group to.

  • :node_group_id (String) —

    Deprecated. This parameter is not used.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 6897

def modify_replication_group(params = {}, options = {})
  req = build_request(:modify_replication_group, params)
  req.send_request(options)
end

#modify_replication_group_shard_configuration(params = {}) ⇒ Types::ModifyReplicationGroupShardConfigurationResult

Modifies a replication group’s shards (node groups) by allowing you to add shards, remove shards, or rebalance the keyspaces among exisiting shards.

Examples:

Request syntax with placeholder values


resp = client.modify_replication_group_shard_configuration({
  replication_group_id: "String", # required
  node_group_count: 1, # required
  apply_immediately: false, # required
  resharding_configuration: [
    {
      node_group_id: "AllowedNodeGroupId",
      preferred_availability_zones: ["String"],
    },
  ],
  node_groups_to_remove: ["AllowedNodeGroupId"],
  node_groups_to_retain: ["AllowedNodeGroupId"],
})

Response structure


resp.replication_group.replication_group_id #=> String
resp.replication_group.description #=> String
resp.replication_group.status #=> String
resp.replication_group.pending_modified_values.primary_cluster_id #=> String
resp.replication_group.pending_modified_values.automatic_failover_status #=> String, one of "enabled", "disabled"
resp.replication_group.pending_modified_values.resharding.slot_migration.progress_percentage #=> Float
resp.replication_group.member_clusters #=> Array
resp.replication_group.member_clusters[0] #=> String
resp.replication_group.node_groups #=> Array
resp.replication_group.node_groups[0].node_group_id #=> String
resp.replication_group.node_groups[0].status #=> String
resp.replication_group.node_groups[0].primary_endpoint.address #=> String
resp.replication_group.node_groups[0].primary_endpoint.port #=> Integer
resp.replication_group.node_groups[0].slots #=> String
resp.replication_group.node_groups[0].node_group_members #=> Array
resp.replication_group.node_groups[0].node_group_members[0].cache_cluster_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].cache_node_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.address #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.port #=> Integer
resp.replication_group.node_groups[0].node_group_members[0].preferred_availability_zone #=> String
resp.replication_group.node_groups[0].node_group_members[0].current_role #=> String
resp.replication_group.snapshotting_cluster_id #=> String
resp.replication_group.automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.replication_group.configuration_endpoint.address #=> String
resp.replication_group.configuration_endpoint.port #=> Integer
resp.replication_group.snapshot_retention_limit #=> Integer
resp.replication_group.snapshot_window #=> String
resp.replication_group.cluster_enabled #=> Boolean
resp.replication_group.cache_node_type #=> String
resp.replication_group.auth_token_enabled #=> Boolean
resp.replication_group.transit_encryption_enabled #=> Boolean
resp.replication_group.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :replication_group_id (required, String) —

    The name of the Redis (cluster mode enabled) cluster (replication group) on which the shards are to be configured.

  • :node_group_count (required, Integer) —

    The number of node groups (shards) that results from the modification of the shard configuration.

  • :apply_immediately (required, Boolean) —

    Indicates that the shard reconfiguration process begins immediately. At present, the only permitted value for this parameter is ‘true`.

    Value: true

  • :resharding_configuration (Array<Types::ReshardingConfiguration>) —

    Specifies the preferred availability zones for each node group in the cluster. If the value of ‘NodeGroupCount` is greater than the current number of node groups (shards), you can use this parameter to specify the preferred availability zones of the cluster’s shards. If you omit this parameter ElastiCache selects availability zones for you.

    You can specify this parameter only if the value of ‘NodeGroupCount` is greater than the current number of node groups (shards).

  • :node_groups_to_remove (Array<String>) —

    If the value of ‘NodeGroupCount` is less than the current number of node groups (shards), the `NodeGroupsToRemove` or `NodeGroupsToRetain` is a required list of node group ids to remove from or retain in the cluster.

    ElastiCache for Redis will attempt to remove all node groups listed by ‘NodeGroupsToRemove` from the cluster.

  • :node_groups_to_retain (Array<String>) —

    If the value of ‘NodeGroupCount` is less than the current number of node groups (shards), the `NodeGroupsToRemove` or `NodeGroupsToRetain` is a required list of node group ids to remove from or retain in the cluster.

    ElastiCache for Redis will attempt to remove all node groups except those listed by ‘NodeGroupsToRetain` from the cluster.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 7007

def modify_replication_group_shard_configuration(params = {}, options = {})
  req = build_request(:modify_replication_group_shard_configuration, params)
  req.send_request(options)
end

#purchase_reserved_cache_nodes_offering(params = {}) ⇒ Types::PurchaseReservedCacheNodesOfferingResult

Allows you to purchase a reserved cache node offering.

Examples:

Example: PurchaseReservedCacheNodesOfferings


# Allows you to purchase a reserved cache node offering.

resp = client.purchase_reserved_cache_nodes_offering({
  reserved_cache_nodes_offering_id: "1ef01f5b-94ff-433f-a530-61a56bfc8e7a", 
})

Request syntax with placeholder values


resp = client.purchase_reserved_cache_nodes_offering({
  reserved_cache_nodes_offering_id: "String", # required
  reserved_cache_node_id: "String",
  cache_node_count: 1,
})

Response structure


resp.reserved_cache_node.reserved_cache_node_id #=> String
resp.reserved_cache_node.reserved_cache_nodes_offering_id #=> String
resp.reserved_cache_node.cache_node_type #=> String
resp.reserved_cache_node.start_time #=> Time
resp.reserved_cache_node.duration #=> Integer
resp.reserved_cache_node.fixed_price #=> Float
resp.reserved_cache_node.usage_price #=> Float
resp.reserved_cache_node.cache_node_count #=> Integer
resp.reserved_cache_node.product_description #=> String
resp.reserved_cache_node.offering_type #=> String
resp.reserved_cache_node.state #=> String
resp.reserved_cache_node.recurring_charges #=> Array
resp.reserved_cache_node.recurring_charges[0].recurring_charge_amount #=> Float
resp.reserved_cache_node.recurring_charges[0].recurring_charge_frequency #=> String
resp.reserved_cache_node.reservation_arn #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :reserved_cache_nodes_offering_id (required, String) —

    The ID of the reserved cache node offering to purchase.

    Example: ‘438012d3-4052-4cc7-b2e3-8d3372e0e706`

  • :reserved_cache_node_id (String) —

    A customer-specified identifier to track this reservation.

    <note markdown=“1”> The Reserved Cache Node ID is an unique customer-specified identifier to track this reservation. If this parameter is not specified, ElastiCache automatically generates an identifier for the reservation.

    </note>

    Example: myreservationID

  • :cache_node_count (Integer) —

    The number of cache node instances to reserve.

    Default: ‘1`

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 7078

def purchase_reserved_cache_nodes_offering(params = {}, options = {})
  req = build_request(:purchase_reserved_cache_nodes_offering, params)
  req.send_request(options)
end

#reboot_cache_cluster(params = {}) ⇒ Types::RebootCacheClusterResult

Reboots some, or all, of the cache nodes within a provisioned cluster. This operation applies any modified cache parameter groups to the cluster. The reboot operation takes place as soon as possible, and results in a momentary outage to the cluster. During the reboot, the cluster status is set to REBOOTING.

The reboot causes the contents of the cache (for each cache node being rebooted) to be lost.

When the reboot is complete, a cluster event is created.

Rebooting a cluster is currently supported on Memcached and Redis (cluster mode disabled) clusters. Rebooting is not supported on Redis (cluster mode enabled) clusters.

If you make changes to parameters that require a Redis (cluster mode enabled) cluster reboot for the changes to be applied, see [Rebooting a Cluster] for an alternate process.

[1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Clusters.Rebooting.html

Examples:

Example: RebootCacheCluster


# Reboots the specified nodes in the names cluster.

resp = client.reboot_cache_cluster({
  cache_cluster_id: "custom-mem1-4  ", 
  cache_node_ids_to_reboot: [
    "0001", 
    "0002", 
  ], 
})

resp.to_h outputs the following:
{
  cache_cluster: {
    auto_minor_version_upgrade: true, 
    cache_cluster_create_time: Time.parse("2016-12-21T21:59:43.794Z"), 
    cache_cluster_id: "my-mem-cluster", 
    cache_cluster_status: "rebooting cache cluster nodes", 
    cache_node_type: "cache.t2.medium", 
    cache_parameter_group: {
      cache_node_ids_to_reboot: [
      ], 
      cache_parameter_group_name: "default.memcached1.4", 
      parameter_apply_status: "in-sync", 
    }, 
    cache_security_groups: [
    ], 
    cache_subnet_group_name: "default", 
    client_download_landing_page: "https://console.aws.amazon.com/elasticache/home#client-download:", 
    configuration_endpoint: {
      address: "my-mem-cluster.abcdef.cfg.use1.cache.amazonaws.com", 
      port: 11211, 
    }, 
    engine: "memcached", 
    engine_version: "1.4.24", 
    num_cache_nodes: 2, 
    pending_modified_values: {
    }, 
    preferred_availability_zone: "Multiple", 
    preferred_maintenance_window: "wed:06:00-wed:07:00", 
  }, 
}

Request syntax with placeholder values


resp = client.reboot_cache_cluster({
  cache_cluster_id: "String", # required
  cache_node_ids_to_reboot: ["String"], # required
})

Response structure


resp.cache_cluster.cache_cluster_id #=> String
resp.cache_cluster.configuration_endpoint.address #=> String
resp.cache_cluster.configuration_endpoint.port #=> Integer
resp.cache_cluster.client_download_landing_page #=> String
resp.cache_cluster.cache_node_type #=> String
resp.cache_cluster.engine #=> String
resp.cache_cluster.engine_version #=> String
resp.cache_cluster.cache_cluster_status #=> String
resp.cache_cluster.num_cache_nodes #=> Integer
resp.cache_cluster.preferred_availability_zone #=> String
resp.cache_cluster.cache_cluster_create_time #=> Time
resp.cache_cluster.preferred_maintenance_window #=> String
resp.cache_cluster.pending_modified_values.num_cache_nodes #=> Integer
resp.cache_cluster.pending_modified_values.cache_node_ids_to_remove #=> Array
resp.cache_cluster.pending_modified_values.cache_node_ids_to_remove[0] #=> String
resp.cache_cluster.pending_modified_values.engine_version #=> String
resp.cache_cluster.pending_modified_values.cache_node_type #=> String
resp.cache_cluster.notification_configuration.topic_arn #=> String
resp.cache_cluster.notification_configuration.topic_status #=> String
resp.cache_cluster.cache_security_groups #=> Array
resp.cache_cluster.cache_security_groups[0].cache_security_group_name #=> String
resp.cache_cluster.cache_security_groups[0].status #=> String
resp.cache_cluster.cache_parameter_group.cache_parameter_group_name #=> String
resp.cache_cluster.cache_parameter_group.parameter_apply_status #=> String
resp.cache_cluster.cache_parameter_group.cache_node_ids_to_reboot #=> Array
resp.cache_cluster.cache_parameter_group.cache_node_ids_to_reboot[0] #=> String
resp.cache_cluster.cache_subnet_group_name #=> String
resp.cache_cluster.cache_nodes #=> Array
resp.cache_cluster.cache_nodes[0].cache_node_id #=> String
resp.cache_cluster.cache_nodes[0].cache_node_status #=> String
resp.cache_cluster.cache_nodes[0].cache_node_create_time #=> Time
resp.cache_cluster.cache_nodes[0].endpoint.address #=> String
resp.cache_cluster.cache_nodes[0].endpoint.port #=> Integer
resp.cache_cluster.cache_nodes[0].parameter_group_status #=> String
resp.cache_cluster.cache_nodes[0].source_cache_node_id #=> String
resp.cache_cluster.cache_nodes[0].customer_availability_zone #=> String
resp.cache_cluster.auto_minor_version_upgrade #=> Boolean
resp.cache_cluster.security_groups #=> Array
resp.cache_cluster.security_groups[0].security_group_id #=> String
resp.cache_cluster.security_groups[0].status #=> String
resp.cache_cluster.replication_group_id #=> String
resp.cache_cluster.snapshot_retention_limit #=> Integer
resp.cache_cluster.snapshot_window #=> String
resp.cache_cluster.auth_token_enabled #=> Boolean
resp.cache_cluster.transit_encryption_enabled #=> Boolean
resp.cache_cluster.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_cluster_id (required, String) —

    The cluster identifier. This parameter is stored as a lowercase string.

  • :cache_node_ids_to_reboot (required, Array<String>) —

    A list of cache node IDs to reboot. A node ID is a numeric identifier (0001, 0002, etc.). To reboot an entire cluster, specify all of the cache node IDs.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 7224

def reboot_cache_cluster(params = {}, options = {})
  req = build_request(:reboot_cache_cluster, params)
  req.send_request(options)
end

#remove_tags_from_resource(params = {}) ⇒ Types::TagListMessage

Removes the tags identified by the ‘TagKeys` list from the named resource.

Examples:

Example: RemoveTagsFromResource


# Removes tags identified by a list of tag keys from the list of tags on the specified resource.

resp = client.remove_tags_from_resource({
  resource_name: "arn:aws:elasticache:us-east-1:1234567890:cluster:my-mem-cluster", 
  tag_keys: [
    "A", 
    "C", 
    "E", 
  ], 
})

resp.to_h outputs the following:
{
  tag_list: [
    {
      key: "B", 
      value: "Banana", 
    }, 
    {
      key: "D", 
      value: "Dog", 
    }, 
    {
      key: "F", 
      value: "Fox", 
    }, 
    {
      key: "I", 
      value: "", 
    }, 
    {
      key: "K", 
      value: "Kite", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.remove_tags_from_resource({
  resource_name: "String", # required
  tag_keys: ["String"], # required
})

Response structure


resp.tag_list #=> Array
resp.tag_list[0].key #=> String
resp.tag_list[0].value #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :resource_name (required, String) —

    The Amazon Resource Name (ARN) of the resource from which you want the tags removed, for example ‘arn:aws:elasticache:us-west-2:0123456789:cluster:myCluster` or `arn:aws:elasticache:us-west-2:0123456789:snapshot:mySnapshot`.

    For more information about ARNs, see [Amazon Resource Names (ARNs) and AWS Service Namespaces].

    [1]: docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html

  • :tag_keys (required, Array<String>) —

    A list of ‘TagKeys` identifying the tags you want removed from the named resource.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 7310

def remove_tags_from_resource(params = {}, options = {})
  req = build_request(:remove_tags_from_resource, params)
  req.send_request(options)
end

#reset_cache_parameter_group(params = {}) ⇒ Types::CacheParameterGroupNameMessage

Modifies the parameters of a cache parameter group to the engine or system default value. You can reset specific parameters by submitting a list of parameter names. To reset the entire cache parameter group, specify the ‘ResetAllParameters` and `CacheParameterGroupName` parameters.

Examples:

Example: ResetCacheParameterGroup


# Modifies the parameters of a cache parameter group to the engine or system default value.

resp = client.reset_cache_parameter_group({
  cache_parameter_group_name: "custom-mem1-4", 
  reset_all_parameters: true, 
})

resp.to_h outputs the following:
{
  cache_parameter_group_name: "custom-mem1-4", 
}

Request syntax with placeholder values


resp = client.reset_cache_parameter_group({
  cache_parameter_group_name: "String", # required
  reset_all_parameters: false,
  parameter_name_values: [
    {
      parameter_name: "String",
      parameter_value: "String",
    },
  ],
})

Response structure


resp.cache_parameter_group_name #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_parameter_group_name (required, String) —

    The name of the cache parameter group to reset.

  • :reset_all_parameters (Boolean) —

    If ‘true`, all parameters in the cache parameter group are reset to their default values. If `false`, only the parameters listed by `ParameterNameValues` are reset to their default values.

    Valid values: ‘true` | `false`

  • :parameter_name_values (Array<Types::ParameterNameValue>) —

    An array of parameter names to reset to their default values. If ‘ResetAllParameters` is `true`, do not use `ParameterNameValues`. If `ResetAllParameters` is `false`, you must specify the name of at least one parameter to reset.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 7377

def reset_cache_parameter_group(params = {}, options = {})
  req = build_request(:reset_cache_parameter_group, params)
  req.send_request(options)
end

#revoke_cache_security_group_ingress(params = {}) ⇒ Types::RevokeCacheSecurityGroupIngressResult

Revokes ingress from a cache security group. Use this operation to disallow access from an Amazon EC2 security group that had been previously authorized.

Examples:

Example: DescribeCacheSecurityGroups


# Returns a list of cache security group descriptions. If a cache security group name is specified, the list contains only
# the description of that group.

resp = client.revoke_cache_security_group_ingress({
  cache_security_group_name: "my-sec-grp", 
  ec2_security_group_name: "my-ec2-sec-grp", 
  ec2_security_group_owner_id: "1234567890", 
})

Request syntax with placeholder values


resp = client.revoke_cache_security_group_ingress({
  cache_security_group_name: "String", # required
  ec2_security_group_name: "String", # required
  ec2_security_group_owner_id: "String", # required
})

Response structure


resp.cache_security_group.owner_id #=> String
resp.cache_security_group.cache_security_group_name #=> String
resp.cache_security_group.description #=> String
resp.cache_security_group.ec2_security_groups #=> Array
resp.cache_security_group.ec2_security_groups[0].status #=> String
resp.cache_security_group.ec2_security_groups[0].ec2_security_group_name #=> String
resp.cache_security_group.ec2_security_groups[0].ec2_security_group_owner_id #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :cache_security_group_name (required, String) —

    The name of the cache security group to revoke ingress from.

  • :ec2_security_group_name (required, String) —

    The name of the Amazon EC2 security group to revoke access from.

  • :ec2_security_group_owner_id (required, String) —

    The AWS account number of the Amazon EC2 security group owner. Note that this is not the same thing as an AWS access key ID - you must provide a valid AWS account number for this parameter.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 7435

def revoke_cache_security_group_ingress(params = {}, options = {})
  req = build_request(:revoke_cache_security_group_ingress, params)
  req.send_request(options)
end

#test_failover(params = {}) ⇒ Types::TestFailoverResult

Represents the input of a ‘TestFailover` operation which test automatic failover on a specified node group (called shard in the console) in a replication group (called cluster in the console).

**Note the following**

  • A customer can use this operation to test automatic failover on up to 5 shards (called node groups in the ElastiCache API and AWS CLI) in any rolling 24-hour period.

  • If calling this operation on shards in different clusters (called replication groups in the API and CLI), the calls can be made concurrently.

  • If calling this operation multiple times on different shards in the same Redis (cluster mode enabled) replication group, the first node replacement must complete before a subsequent call can be made.

  • To determine whether the node replacement is complete you can check Events using the Amazon ElastiCache console, the AWS CLI, or the ElastiCache API. Look for the following automatic failover related events, listed here in order of occurrance:

    1. Replication group message: ‘Test Failover API called for node group <node-group-id>`

    2. Cache cluster message: ‘Failover from master node <primary-node-id> to replica node <node-id> completed`

    3. Replication group message: ‘Failover from master node <primary-node-id> to replica node <node-id> completed`

    4. Cache cluster message: ‘Recovering cache nodes <node-id>`

    5. Cache cluster message: ‘Finished recovery for cache nodes <node-id>`

    For more information see:

    • Viewing ElastiCache Events][1

      in the *ElastiCache User Guide*

    • DescribeEvents][2

      in the ElastiCache API Reference

Also see, [Testing Multi-AZ with Automatic Failover] in the *ElastiCache User Guide*.

[1]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/ECEvents.Viewing.html [2]: docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_DescribeEvents.html [3]: docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/AutoFailover.html#auto-failover-test

Examples:

Request syntax with placeholder values


resp = client.test_failover({
  replication_group_id: "String", # required
  node_group_id: "AllowedNodeGroupId", # required
})

Response structure


resp.replication_group.replication_group_id #=> String
resp.replication_group.description #=> String
resp.replication_group.status #=> String
resp.replication_group.pending_modified_values.primary_cluster_id #=> String
resp.replication_group.pending_modified_values.automatic_failover_status #=> String, one of "enabled", "disabled"
resp.replication_group.pending_modified_values.resharding.slot_migration.progress_percentage #=> Float
resp.replication_group.member_clusters #=> Array
resp.replication_group.member_clusters[0] #=> String
resp.replication_group.node_groups #=> Array
resp.replication_group.node_groups[0].node_group_id #=> String
resp.replication_group.node_groups[0].status #=> String
resp.replication_group.node_groups[0].primary_endpoint.address #=> String
resp.replication_group.node_groups[0].primary_endpoint.port #=> Integer
resp.replication_group.node_groups[0].slots #=> String
resp.replication_group.node_groups[0].node_group_members #=> Array
resp.replication_group.node_groups[0].node_group_members[0].cache_cluster_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].cache_node_id #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.address #=> String
resp.replication_group.node_groups[0].node_group_members[0].read_endpoint.port #=> Integer
resp.replication_group.node_groups[0].node_group_members[0].preferred_availability_zone #=> String
resp.replication_group.node_groups[0].node_group_members[0].current_role #=> String
resp.replication_group.snapshotting_cluster_id #=> String
resp.replication_group.automatic_failover #=> String, one of "enabled", "disabled", "enabling", "disabling"
resp.replication_group.configuration_endpoint.address #=> String
resp.replication_group.configuration_endpoint.port #=> Integer
resp.replication_group.snapshot_retention_limit #=> Integer
resp.replication_group.snapshot_window #=> String
resp.replication_group.cluster_enabled #=> Boolean
resp.replication_group.cache_node_type #=> String
resp.replication_group.auth_token_enabled #=> Boolean
resp.replication_group.transit_encryption_enabled #=> Boolean
resp.replication_group.at_rest_encryption_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :replication_group_id (required, String) —

    The name of the replication group (console: cluster) whose automatic failover is being tested by this operation.

  • :node_group_id (required, String) —

    The name of the node group (called shard in the console) in this replication group on which automatic failover is to be tested. You may test automatic failover on up to 5 node groups in any rolling 24-hour period.

Returns:

See Also:



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# File 'lib/aws-sdk-elasticache/client.rb', line 7554

def test_failover(params = {}, options = {})
  req = build_request(:test_failover, params)
  req.send_request(options)
end

#wait_until(waiter_name, params = {}, options = {}) {|w.waiter| ... } ⇒ Boolean

Polls an API operation until a resource enters a desired state.

## Basic Usage

A waiter will call an API operation until:

  • It is successful

  • It enters a terminal state

  • It makes the maximum number of attempts

In between attempts, the waiter will sleep.

# polls in a loop, sleeping between attempts
client.waiter_until(waiter_name, params)

## Configuration

You can configure the maximum number of polling attempts, and the delay (in seconds) between each polling attempt. You can pass configuration as the final arguments hash.

# poll for ~25 seconds
client.wait_until(waiter_name, params, {
  max_attempts: 5,
  delay: 5,
})

## Callbacks

You can be notified before each polling attempt and before each delay. If you throw ‘:success` or `:failure` from these callbacks, it will terminate the waiter.

started_at = Time.now
client.wait_until(waiter_name, params, {

  # disable max attempts
  max_attempts: nil,

  # poll for 1 hour, instead of a number of attempts
  before_wait: -> (attempts, response) do
    throw :failure if Time.now - started_at > 3600
  end
})

## Handling Errors

When a waiter is unsuccessful, it will raise an error. All of the failure errors extend from Waiters::Errors::WaiterFailed.

begin
  client.wait_until(...)
rescue Aws::Waiters::Errors::WaiterFailed
  # resource did not enter the desired state in time
end

## Valid Waiters

The following table lists the valid waiter names, the operations they call, and the default ‘:delay` and `:max_attempts` values.

| waiter_name | params | :delay | :max_attempts | | ————————— | —————————— | ——– | ————- | | cache_cluster_available | #describe_cache_clusters | 15 | 40 | | cache_cluster_deleted | #describe_cache_clusters | 15 | 40 | | replication_group_available | #describe_replication_groups | 15 | 40 | | replication_group_deleted | #describe_replication_groups | 15 | 40 |

Parameters:

  • waiter_name (Symbol)
  • params (Hash) (defaults to: {}) —

    ({})

  • options (Hash) (defaults to: {}) —

    ({})

Options Hash (options):

  • :max_attempts (Integer)
  • :delay (Integer)
  • :before_attempt (Proc)
  • :before_wait (Proc)

Yields:

  • (w.waiter)

Returns:

  • (Boolean) —

    Returns ‘true` if the waiter was successful.

Raises:

  • (Errors::FailureStateError) —

    Raised when the waiter terminates because the waiter has entered a state that it will not transition out of, preventing success.

  • (Errors::TooManyAttemptsError) —

    Raised when the configured maximum number of attempts have been made, and the waiter is not yet successful.

  • (Errors::UnexpectedError) —

    Raised when an error is encounted while polling for a resource that is not expected.

  • (Errors::NoSuchWaiterError) —

    Raised when you request to wait for an unknown state.



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# File 'lib/aws-sdk-elasticache/client.rb', line 7667

def wait_until(waiter_name, params = {}, options = {})
  w = waiter(waiter_name, options)
  yield(w.waiter) if block_given? # deprecated
  w.wait(params)
end

#waiter_names ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Deprecated. 


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# File 'lib/aws-sdk-elasticache/client.rb', line 7675

def waiter_names
  waiters.keys
end