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.



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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.



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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.



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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.



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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.



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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



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

def hypervisor
  @hypervisor
end

#id ⇒ String (readonly) 



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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.



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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.



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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.



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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.



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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.



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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.



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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.



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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



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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.



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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”).



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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.



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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.



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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.



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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).



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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.



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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.



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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



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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.



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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



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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.



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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.



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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"



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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



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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.



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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.



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# File 'lib/aws/ec2/instance.rb', line 480

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

#availability_zone ⇒ String 



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# File 'lib/aws/ec2/instance.rb', line 410

def availability_zone
  if p = placement
    p.availability_zone
  end
end

#block_device_mappings ⇒ Hash<String,Attachment> 



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# File 'lib/aws/ec2/instance.rb', line 366

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.



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# File 'lib/aws/ec2/instance.rb', line 469

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.

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.



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# File 'lib/aws/ec2/instance.rb', line 461

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

#dedicated_tenancy? ⇒ Boolean 



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

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

#disable_monitoring ⇒ nil

Disables monitoring for this instance.



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# File 'lib/aws/ec2/instance.rb', line 385

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 493

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? 



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# File 'lib/aws/ec2/instance.rb', line 503

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

#enable_monitoring ⇒ nil

Enables monitoring for this instance.



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

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

#exists? ⇒ Boolean 



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# File 'lib/aws/ec2/instance.rb', line 516

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

#has_elastic_ip? ⇒ Boolean 



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# File 'lib/aws/ec2/instance.rb', line 510

def has_elastic_ip?
  !elastic_ip.nil?
end

#image ⇒ Image 



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# File 'lib/aws/ec2/instance.rb', line 428

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

#key_pair ⇒ KeyPair 



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# File 'lib/aws/ec2/instance.rb', line 434

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

#monitoring_enabled=(value) ⇒ Object

Enables or disables monitoring for this instance.



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# File 'lib/aws/ec2/instance.rb', line 393

def monitoring_enabled= value
  value ? enable_monitoring : disable_monitoring
end

#monitoring_enabled? ⇒ Booelan 



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# File 'lib/aws/ec2/instance.rb', line 399

def monitoring_enabled?
  monitoring == :enabled
end

#reboot ⇒ nil

Reboots the instance.



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# File 'lib/aws/ec2/instance.rb', line 543

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 523

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 529

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

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



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# File 'lib/aws/ec2/instance.rb', line 355

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

#spot_instance? ⇒ Boolean 



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# File 'lib/aws/ec2/instance.rb', line 404

def spot_instance?
  instance_lifecycle == :spot
end

#start ⇒ nil

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

See Also:



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# File 'lib/aws/ec2/instance.rb', line 550

def start
  instance_action :start
end

#stop ⇒ nil

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



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

def stop
  instance_action :stop
end

#terminate ⇒ nil Also known as: delete

Terminates the instance.



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# File 'lib/aws/ec2/instance.rb', line 536

def terminate
  instance_action :terminate
end