Class: AWS::EC2::Instance

Inherits:
Resource
  • Object
show all
Includes:
TaggedItem
Defined in:
lib/aws/ec2/instance.rb

Overview

Represents an EC2 instance.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from TaggedItem

#add_tag, #clear_tags, #tags

Constructor Details

#initialize(instance_id, opts = {}) ⇒ Instance

Creates an object that represents the instance with the given ID. It’s usually easier to get an instance of this class by calling AWS::EC2::InstanceCollection#[] or AWS::EC2::InstanceCollection#each.



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# File 'lib/aws/ec2/instance.rb', line 155

def initialize(instance_id, opts = {})
  super
  @id = instance_id
end

Instance Attribute Details

#ami_launch_index ⇒ Integer (readonly)

The AMI launch index, which can be used to find this instance within the launch group.

Returns:

  • (Integer) —

    the current value of ami_launch_index



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# File 'lib/aws/ec2/instance.rb', line 147

def ami_launch_index
  @ami_launch_index
end

#api_termination_disabled ⇒ Boolean

True if the instance cannot be terminated using the #terminate method. This attribute can be changed at any time.

Returns:

  • (Boolean) —

    the current value of api_termination_disabled



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# File 'lib/aws/ec2/instance.rb', line 147

def api_termination_disabled
  @api_termination_disabled
end

#architecture ⇒ Symbol (readonly)

The architecture of the image.

Returns:

  • (Symbol) —

    the current value of architecture



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# File 'lib/aws/ec2/instance.rb', line 147

def architecture
  @architecture
end

#client_token ⇒ String (readonly)

Idempotency token you provided when you launched the instance.

Returns:

  • (String) —

    the current value of client_token



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# File 'lib/aws/ec2/instance.rb', line 147

def client_token
  @client_token
end

#dns_name ⇒ String (readonly) Also known as: public_dns_name

The DNS name of the instance on the internet.

Returns:

  • (String) —

    the current value of dns_name



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# File 'lib/aws/ec2/instance.rb', line 147

def dns_name
  @dns_name
end

#hypervisor ⇒ Symbol (readonly)

The instance’s hypervisor type. Valid values:

  • :ovm

  • :xen

Returns:

  • (Symbol) —

    the current value of hypervisor



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# File 'lib/aws/ec2/instance.rb', line 147

def hypervisor
  @hypervisor
end

#id ⇒ String (readonly) Also known as: instance_id

Returns the instance id.

Returns:

  • (String) —

    Returns the instance id.



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# File 'lib/aws/ec2/instance.rb', line 161

def id
  @id
end

#image_id ⇒ String (readonly)

Image ID of the AMI used to launch the instance.

Returns:

  • (String) —

    the current value of image_id



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# File 'lib/aws/ec2/instance.rb', line 147

def image_id
  @image_id
end

#instance_initiated_shutdown_behavior ⇒ String

Valid values are:

“stop”

When the instance shuts down, it will go into a “stopped” state.

“terminate”

When the instance shuts down, it will be terminated.

Returns:

  • (String) —

    the current value of instance_initiated_shutdown_behavior



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# File 'lib/aws/ec2/instance.rb', line 147

def instance_initiated_shutdown_behavior
  @instance_initiated_shutdown_behavior
end

#instance_type ⇒ String

The instance type, e.g. “m1.small”. The instance must be in a stopped state to change the instance type.

Returns:

  • (String) —

    the current value of instance_type



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# File 'lib/aws/ec2/instance.rb', line 147

def instance_type
  @instance_type
end

#ip_address ⇒ String (readonly) Also known as: public_ip_address

The IP address of the instance.

Returns:

  • (String) —

    the current value of ip_address



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# File 'lib/aws/ec2/instance.rb', line 147

def ip_address
  @ip_address
end

#kernel_id ⇒ String

The ID of the kernel that the image currently uses. The instance must be in a stopped state to change this attribute.

Returns:

  • (String) —

    the current value of kernel_id



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# File 'lib/aws/ec2/instance.rb', line 147

def kernel_id
  @kernel_id
end

#key_name ⇒ String (readonly)

The name of the key pair with which this instance was associated at launch.

Returns:

  • (String) —

    the current value of key_name



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# File 'lib/aws/ec2/instance.rb', line 147

def key_name
  @key_name
end

#launch_time ⇒ Time (readonly)

The time at which the instance was launched.

Returns:

  • (Time) —

    the current value of launch_time



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# File 'lib/aws/ec2/instance.rb', line 147

def launch_time
  @launch_time
end

#monitoring ⇒ Symbol (readonly)

The status of CloudWatch monitoring for the instance. Valid values:

  • :enabled

  • :disabled

  • :pending

Returns:

  • (Symbol) —

    the current value of monitoring



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# File 'lib/aws/ec2/instance.rb', line 147

def monitoring
  @monitoring
end

#owner_id ⇒ String (readonly)

ID of the AWS account that owns the reservation in which the instance was launched.

Returns:

  • (String) —

    the current value of owner_id



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# File 'lib/aws/ec2/instance.rb', line 147

def owner_id
  @owner_id
end

#platform ⇒ String (readonly)

A string describing the platform of the image (e.g. “windows”).

Returns:

  • (String) —

    the current value of platform



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# File 'lib/aws/ec2/instance.rb', line 147

def platform
  @platform
end

#private_dns_name ⇒ String (readonly)

The DNS name of the instance within the EC2 network.

Returns:

  • (String) —

    the current value of private_dns_name



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# File 'lib/aws/ec2/instance.rb', line 147

def private_dns_name
  @private_dns_name
end

#private_ip_address ⇒ String (readonly)

The private IP address assigned to the instance.

Returns:

  • (String) —

    the current value of private_ip_address



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# File 'lib/aws/ec2/instance.rb', line 147

def private_ip_address
  @private_ip_address
end

#ramdisk_id ⇒ String

The ID of the RAM disk that the image currently uses. The instance must be in a stopped state to change this attribute.

Returns:

  • (String) —

    the current value of ramdisk_id



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# File 'lib/aws/ec2/instance.rb', line 147

def ramdisk_id
  @ramdisk_id
end

#requester_id ⇒ String (readonly)

ID of the requester that launched the instance on your behalf (e.g., AWS Management Console, Auto Scaling).

Returns:

  • (String) —

    the current value of requester_id



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# File 'lib/aws/ec2/instance.rb', line 147

def requester_id
  @requester_id
end

#reservation_id ⇒ String (readonly)

The ID of the reservation in which this instance was launched.

Returns:

  • (String) —

    the current value of reservation_id



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# File 'lib/aws/ec2/instance.rb', line 147

def reservation_id
  @reservation_id
end

#root_device_name ⇒ String (readonly)

The name of the root device.

Returns:

  • (String) —

    the current value of root_device_name



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# File 'lib/aws/ec2/instance.rb', line 147

def root_device_name
  @root_device_name
end

#root_device_type ⇒ Symbol (readonly)

The root device type used by the AMI. The AMI can use an Amazon EBS or instance store root device. Valid values:

  • :ebs

  • :instance_store

Returns:

  • (Symbol) —

    the current value of root_device_type



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# File 'lib/aws/ec2/instance.rb', line 147

def root_device_type
  @root_device_type
end

#state_transition_reason ⇒ String (readonly)

A string describing the reason for the last state transition.

Returns:

  • (String) —

    the current value of state_transition_reason



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# File 'lib/aws/ec2/instance.rb', line 147

def state_transition_reason
  @state_transition_reason
end

#status ⇒ Symbol (readonly)

The instance status. Valid values are:

  • :pending

  • :running

  • :shutting_down

  • :terminated

  • :stopping

  • :stopped

Returns:

  • (Symbol) —

    the current value of status



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# File 'lib/aws/ec2/instance.rb', line 147

def status
  @status
end

#status_code ⇒ Integer (readonly)

The numeric instance status code.

Returns:

  • (Integer) —

    the current value of status_code



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# File 'lib/aws/ec2/instance.rb', line 147

def status_code
  @status_code
end

#subnet_id ⇒ String? (readonly)

Instances launched in a VPC have a subnet_id. Normal EC2 instances return nil.

Returns:

  • (String, nil) —

    the current value of subnet_id



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# File 'lib/aws/ec2/instance.rb', line 147

def subnet_id
  @subnet_id
end

#user_data ⇒ String

Arbitrary metadata that is available to the instance while it is running. This interface handles the details of encoding the user data for transmission; you should set the user data exactly as you want it to be made available to the instance.

The instance must be in a stopped state to change user data; for example:

i.user_data             # => "HELLO"
i.status                # => :running
i.user_data = "GOODBYE" # raises an exception
i.stop; sleep 1 until i.status == :stopped
i.user_data = "GOODBYE" # => "GOODBYE"

Returns:

  • (String) —

    the current value of user_data



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# File 'lib/aws/ec2/instance.rb', line 147

def user_data
  @user_data
end

#virtualization_type ⇒ Symbol (readonly)

The instance’s virtualization type. Valid values:

  • :paravirtual

  • :hvm

Returns:

  • (Symbol) —

    the current value of virtualization_type



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# File 'lib/aws/ec2/instance.rb', line 147

def virtualization_type
  @virtualization_type
end

#vpc_id ⇒ String? (readonly)

Instances launched in a VPC have a vpc_id. Normal EC2 instances return nil.

Returns:

  • (String, nil) —

    the current value of vpc_id



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# File 'lib/aws/ec2/instance.rb', line 147

def vpc_id
  @vpc_id
end

Instance Method Details

#associate_elastic_ip(elastic_ip) ⇒ nil Also known as: ip_address=

Associates the elastic IP address with this instance.

Parameters:

  • elastic_ip (ElasticIp, String) —

    Either a public IP address string or an ElasticIp object to associate to this instance.

Returns:

  • (nil) 


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# File 'lib/aws/ec2/instance.rb', line 533

def associate_elastic_ip elastic_ip
  client.associate_address(
    :public_ip => elastic_ip.to_s,
    :instance_id => self.id
  )
  nil
end

#attach_network_interface(network_interface, options = {}) ⇒ nil

Attaches a network interface to this instance (VPC only).

Parameters:

  • network_interface (NetworkInterface, String) —

    A network interface (or network interface id string) to attach to this vpc instance.

  • options (Hash) (defaults to: {})

Options Hash (options):

  • :device_index (Integer) — default: 1 —

    The index of the device for the network interface attachment on the instance. Defaults to 1.

Returns:

  • (nil) 


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# File 'lib/aws/ec2/instance.rb', line 396

def attach_network_interface network_interface, options = {}
  if network_interface.is_a?(NetworkInterface) 
    network_interface.attach(self, options)
  else
    i = NetworkInterface.new(network_interface, :config => config)
    i.attach(self, options)
  end
  nil
end

#availability_zone ⇒ String

Returns The availability zone where the instance is running.

Returns:

  • (String) —

    The availability zone where the instance is running.



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# File 'lib/aws/ec2/instance.rb', line 463

def availability_zone
  if p = placement
    p.availability_zone
  end
end

#block_device_mappings ⇒ Hash<String,Attachment>

Returns a hash of device mappings. The keys are device name strings (e.g. ‘/dev/sda’) and the values are Attachment objects.

Returns:

  • (Hash<String,Attachment>) —

    Returns a hash of device mappings. The keys are device name strings (e.g. ‘/dev/sda’) and the values are Attachment objects.



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# File 'lib/aws/ec2/instance.rb', line 419

def block_device_mappings
  (block_device_mapping || []).inject({}) do |m, mapping|
    device = mapping.device_name
    volume = Volume.new(mapping.ebs.volume_id, :config => config)
    attachment = Attachment.new(volume, self, device, :config => config)
    m[device] = attachment
    m
  end
end

#console_output ⇒ String

Retrieves the console output for the instance.

Returns:

  • (String) —

    the console output.



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# File 'lib/aws/ec2/instance.rb', line 522

def console_output
  output = client.get_console_output(:instance_id => self.id).output
  Base64.decode64(output) if output
end

#create_image(name, options = {}) ⇒ Image

Creates an AMI from this instance.

Parameters:

  • name (String) —

    A name for the new image you’re creating. Constraints: 3-128 alphanumeric characters, parenthesis (()), commas (,), slashes (/), dashes (-), or underscores(_)

  • options (Hash) (defaults to: {}) —

    Additional options for creating the image.

Options Hash (options):

  • :description (String) —

    A description of the new image.

  • :no_reboot (Boolean) —

    By default this option is set to false, which means Amazon EC2 attempts to cleanly shut down the instance before image creation and reboots the instance afterwards. When the option is set to true, Amazon EC2 does not shut down the instance before creating the image. When this option is used, file system integrity on the created image cannot be guaranteed.

Returns:

  • (Image) —

    The newly created image.



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# File 'lib/aws/ec2/instance.rb', line 514

def create_image name, options = {}
  images = ImageCollection.new(:config => config)
  images.create(options.merge(:instance_id => id, :name => name))
end

#dedicated_tenancy? ⇒ Boolean

Returns true if the instance has dedicated tenancy. This will be false for all non-VPC instances. Dedicated Tenancy comes at extra cost.

Returns:

  • (Boolean) —

    Returns true if the instance has dedicated tenancy. This will be false for all non-VPC instances. Dedicated Tenancy comes at extra cost.



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# File 'lib/aws/ec2/instance.rb', line 472

def dedicated_tenancy?
  if p = placement
    p.tenancy == 'dedicated'
  else
    false
  end
end

#disable_monitoring ⇒ nil

Disables monitoring for this instance.

Returns:

  • (nil) 


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# File 'lib/aws/ec2/instance.rb', line 438

def disable_monitoring
  client.unmonitor_instances(:instance_ids => [id])
  nil
end

#disassociate_elastic_ip ⇒ Object

Disassociates an attached elastic IP address from this instance. Raises an exception if there is no elastic IP address associated with this instance.



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# File 'lib/aws/ec2/instance.rb', line 546

def disassociate_elastic_ip
  if ip = self.elastic_ip
    ip.disassociate
  else
    raise "instance #{id} does not have an associated elastic ip"
  end
end

#elastic_ip ⇒ ElasticIp?

Returns an elastic IP address if one is associated with this instance, nil otherwise.

Returns:

  • (ElasticIp, nil) —

    Returns an elastic IP address if one is associated with this instance, nil otherwise.



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# File 'lib/aws/ec2/instance.rb', line 556

def elastic_ip
  ips = ElasticIpCollection.new(:config => config)
  ips.filter('instance-id', id).first
end

#enable_monitoring ⇒ nil

Enables monitoring for this instance.

Returns:

  • (nil) 


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# File 'lib/aws/ec2/instance.rb', line 431

def enable_monitoring
  client.monitor_instances(:instance_ids => [id])
  nil
end

#exists? ⇒ Boolean

Returns true if the instance exists according to EC2.

Returns:

  • (Boolean) —

    Returns true if the instance exists according to EC2.



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# File 'lib/aws/ec2/instance.rb', line 569

def exists?
  client.describe_instances(:filters => [
    { :name => "instance-id", :values => [id] }
  ]).instance_index.key?(id)
end

#has_elastic_ip? ⇒ Boolean

Returns true if an elastic IP address is associated with this instance, false otherwise.

Returns:

  • (Boolean) —

    Returns true if an elastic IP address is associated with this instance, false otherwise.



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# File 'lib/aws/ec2/instance.rb', line 563

def has_elastic_ip?
  !elastic_ip.nil?
end

#image ⇒ Image

Returns The AMI used to launch the instance.

Returns:

  • (Image) —

    The AMI used to launch the instance.



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# File 'lib/aws/ec2/instance.rb', line 481

def image
  Image.new(image_id, :config => config)
end

#key_pair ⇒ KeyPair

Returns The key pair with which this instance was associated at launch.

Returns:

  • (KeyPair) —

    The key pair with which this instance was associated at launch.



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# File 'lib/aws/ec2/instance.rb', line 487

def key_pair
  KeyPair.new(key_name, :config => config) if key_name
end

#monitoring_enabled=(value) ⇒ Object

Enables or disables monitoring for this instance.

Parameters:

  • state (Boolean) —

    A true or false value. Enables monintoring for a true value, disables it for a false value.



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# File 'lib/aws/ec2/instance.rb', line 446

def monitoring_enabled= value
  value ? enable_monitoring : disable_monitoring
end

#monitoring_enabled? ⇒ Booelan

Returns true if CloudWatch monitoring is enabled for this instance.

Returns:

  • (Booelan) —

    Returns true if CloudWatch monitoring is enabled for this instance.



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# File 'lib/aws/ec2/instance.rb', line 452

def monitoring_enabled?
  monitoring == :enabled
end

#network_interfaces ⇒ Array<NetworkInterface>

Returns a list of elastic network interfaces attached to this instance (VPC only). Non-vpc instance may not have attached network interfaces.

Returns:

  • (Array<NetworkInterface>) —

    Returns a list of elastic network interfaces attached to this instance (VPC only). Non-vpc instance may not have attached network interfaces.



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# File 'lib/aws/ec2/instance.rb', line 378

def network_interfaces
  network_interface_set.collect do |ni|
    NetworkInterface.new_from(:describe_network_interfaces, ni,
      ni.network_interface_id, :config => config)
  end
end

#reboot ⇒ nil

Reboots the instance.

Returns:

  • (nil) 


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# File 'lib/aws/ec2/instance.rb', line 596

def reboot
  instance_action :reboot
end

#reset_kernel_id ⇒ Object

Resets the kernel to its default value.



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# File 'lib/aws/ec2/instance.rb', line 576

def reset_kernel_id
  client.reset_instance_attribute(
    :instance_id => id, :attribute => "kernel").return
end

#reset_ramdisk_id ⇒ Object

Resets the RAM disk to its default value.



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# File 'lib/aws/ec2/instance.rb', line 582

def reset_ramdisk_id
  client.reset_instance_attribute(
    :instance_id => id, :attribute => "ramdisk").return
end

#security_groups ⇒ Array<SecurityGroup> Also known as: groups

Returns a list of security groups the instance belongs to.

Returns:

  • (Array<SecurityGroup>) —

    Returns a list of security groups the instance belongs to.



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# File 'lib/aws/ec2/instance.rb', line 408

def security_groups
  (group_set || []).collect do |g|
    SecurityGroup.new(g.group_id, :name => g.group_name, :config => config)
  end
end

#spot_instance? ⇒ Boolean

Returns true if the instance is a Spot instance.

Returns:

  • (Boolean) —

    true if the instance is a Spot instance.



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# File 'lib/aws/ec2/instance.rb', line 457

def spot_instance?
  instance_lifecycle == :spot
end

#start ⇒ nil

Starts the instance, assuming it is in a stopped state.

Returns:

  • (nil)

See Also:



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# File 'lib/aws/ec2/instance.rb', line 603

def start
  instance_action :start
end

#stop ⇒ nil

Stops the instance, eventually putting it into a stopped state.

Returns:

  • (nil) 


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# File 'lib/aws/ec2/instance.rb', line 609

def stop
  instance_action :stop
end

#subnet ⇒ Subnet?

Returns the VPC subnet this instance was launched in. Returns nil if this was not launched in a VPC.

Returns:

  • (Subnet, nil) —

    Returns the VPC subnet this instance was launched in. Returns nil if this was not launched in a VPC.



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# File 'lib/aws/ec2/instance.rb', line 369

def subnet
  if subnet_id
    Subnet.new(subnet_id, :vpc_id => vpc_id, :config => config)
  end
end

#terminate ⇒ nil Also known as: delete

Terminates the instance.

Returns:

  • (nil) 


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# File 'lib/aws/ec2/instance.rb', line 589

def terminate
  instance_action :terminate
end

#vpc ⇒ VPC?

Returns the VPC this instance was launched in. If this instance was not launched inside a VPC, nil is returned.

Returns:

  • (VPC, nil) —

    Returns the VPC this instance was launched in. If this instance was not launched inside a VPC, nil is returned.



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# File 'lib/aws/ec2/instance.rb', line 361

def vpc
  if vpc_id
    VPC.new(vpc_id, :config => config)
  end
end