Class: Aws::ServiceDiscovery::Types::DnsRecord

Inherits:

Struct

Object
Struct
Aws::ServiceDiscovery::Types::DnsRecord

Includes:: Aws::Structure

Defined in:: lib/aws-sdk-servicediscovery/types.rb

Overview

A complex type that contains information about the Route 53 DNS records that you want Cloud Map to create when you register an instance.

Constant Summary collapse

SENSITIVE =

[]

Instance Attribute Summary collapse

#ttl ⇒ Integer

The amount of time, in seconds, that you want DNS resolvers to cache the settings for this record.
#type ⇒ String

The type of the resource, which indicates the type of value that Route 53 returns in response to DNS queries.

Instance Attribute Details

#ttl ⇒ `Integer`

The amount of time, in seconds, that you want DNS resolvers to cache the settings for this record.

<note markdown=“1”> Alias records don’t include a TTL because Route 53 uses the TTL for the Amazon Web Services resource that an alias record routes traffic to. If you include the ‘AWS_ALIAS_DNS_NAME` attribute when you submit a [RegisterInstance] request, the `TTL` value is ignored. Always specify a TTL for the service; you can use a service to register instances that create either alias or non-alias records.

</note>

[1]: docs.aws.amazon.com/cloud-map/latest/api/API_RegisterInstance.html

Returns:

(Integer)

# File 'lib/aws-sdk-servicediscovery/types.rb', line 809

class DnsRecord < Struct.new(
  :type,
  :ttl)
  SENSITIVE = []
  include Aws::Structure
end

#type ⇒ `String`

The type of the resource, which indicates the type of value that Route 53 returns in response to DNS queries. You can specify values for ‘Type` in the following combinations:

A
AAAA
A and AAAA
SRV
CNAME

If you want Cloud Map to create a Route 53 alias record when you register an instance, specify ‘A` or `AAAA` for `Type`.

You specify other settings, such as the IP address for ‘A` and `AAAA` records, when you register an instance. For more information, see [RegisterInstance].

The following values are supported:

: Route 53 returns the IP address of the resource in IPv4 format,

such as 192.0.2.44.

AAAA

: Route 53 returns the IP address of the resource in IPv6 format,

such as 2001:0db8:85a3:0000:0000:abcd:0001:2345.

CNAME

: Route 53 returns the domain name of the resource, such as

www.example.com. Note the following:

* You specify the domain name that you want to route traffic to
  when you register an instance. For more information, see
  [Attributes][2] in the topic [RegisterInstance][1].

* You must specify `WEIGHTED` for the value of `RoutingPolicy`.

* You can't specify both `CNAME` for `Type` and settings for
  `HealthCheckConfig`. If you do, the request will fail with an
  `InvalidInput` error.

SRV

: Route 53 returns the value for an ‘SRV` record. The value for an

`SRV` record uses the following values:

`priority weight port service-hostname`

Note the following about the values:

* The values of `priority` and `weight` are both set to `1` and
  can't be changed.

* The value of `port` comes from the value that you specify for
  the `AWS_INSTANCE_PORT` attribute when you submit a
  [RegisterInstance][1] request.

* The value of `service-hostname` is a concatenation of the
  following values:

  * The value that you specify for `InstanceId` when you register
    an instance.

  * The name of the service.

  * The name of the namespace.

  For example, if the value of `InstanceId` is `test`, the name of
  the service is `backend`, and the name of the namespace is
  `example.com`, the value of `service-hostname` is the following:

  `test.backend.example.com`

If you specify settings for an `SRV` record, note the following:

* If you specify values for `AWS_INSTANCE_IPV4`,
  `AWS_INSTANCE_IPV6`, or both in the `RegisterInstance` request,
  Cloud Map automatically creates `A` and/or `AAAA` records that
  have the same name as the value of `service-hostname` in the
  `SRV` record. You can ignore these records.

* If you're using a system that requires a specific `SRV` format,
  such as HAProxy, see the [Name][3] element in the documentation
  about `CreateService` for information about how to specify the
  correct name format.

[1]: docs.aws.amazon.com/cloud-map/latest/api/API_RegisterInstance.html [2]: docs.aws.amazon.com/cloud-map/latest/api/API_RegisterInstance.html#cloudmap-RegisterInstance-request-Attributes [3]: docs.aws.amazon.com/cloud-map/latest/api/API_CreateService.html#cloudmap-CreateService-request-Name