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Class: Aws::AutoScaling::Client

Inherits:
Seahorse::Client::Base show all
Includes:
ClientStubs
Defined in:
gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb

Instance Attribute Summary

Attributes inherited from Seahorse::Client::Base

#config, #handlers

API Operations collapse

Instance Method Summary collapse

Methods included from ClientStubs

#api_requests, #stub_data, #stub_responses

Methods inherited from Seahorse::Client::Base

add_plugin, api, clear_plugins, define, new, #operation_names, plugins, remove_plugin, set_api, set_plugins

Methods included from Seahorse::Client::HandlerBuilder

#handle, #handle_request, #handle_response

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[:credentials]
    • The :access_key_id, :secret_access_key, and :session_token options.
    • ENV['AWS_ACCESS_KEY_ID'], ENV['AWS_SECRET_ACCESS_KEY']
    • ~/.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:

    • Aws.config[:region]
    • ENV['AWS_REGION']
    • ENV['AMAZON_REGION']
    • ENV['AWS_DEFAULT_REGION']
    • ~/.aws/credentials
    • ~/.aws/config
  • :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_host (String) — default: "127.0.0.1" —

    Allows you to specify the DNS hostname or IPv4 or IPv6 address that the client side monitoring agent is running on, where client metrics will be published via UDP.

  • :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 https://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.

  • :http_proxy (URI::HTTP, String) —

    A proxy to send requests through. Formatted like 'http://proxy.com:123'.

  • :http_open_timeout (Float) — default: 15 —

    The number of seconds to wait when opening a HTTP session before rasing a Timeout::Error.

  • :http_read_timeout (Integer) — default: 60 —

    The default number of seconds to wait for response data. This value can safely be set per-request on the session yeidled by #session_for.

  • :http_idle_timeout (Float) — default: 5 —

    The number of seconds a connection is allowed to sit idble before it is considered stale. Stale connections are closed and removed from the pool before making a request.

  • :http_continue_timeout (Float) — default: 1 —

    The number of seconds to wait for a 100-continue response before sending the request body. This option has no effect unless the request has "Expect" header set to "100-continue". Defaults to nil which disables this behaviour. This value can safely be set per request on the session yeidled by #session_for.

  • :http_wire_trace (Boolean) — default: false —

    When true, HTTP debug output will be sent to the :logger.

  • :ssl_verify_peer (Boolean) — default: true —

    When true, SSL peer certificates are verified when establishing a connection.

  • :ssl_ca_bundle (String) —

    Full path to the SSL certificate authority bundle file that should be used when verifying peer certificates. If you do not pass :ssl_ca_bundle or :ssl_ca_directory the the system default will be used if available.

  • :ssl_ca_directory (String) —

    Full path of the directory that contains the unbundled SSL certificate authority files for verifying peer certificates. If you do not pass :ssl_ca_bundle or :ssl_ca_directory the the system default will be used if available.



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 251

def initialize(*args)
  super
end

Instance Method Details

#attach_instances(params = {}) ⇒ Struct

Attaches one or more EC2 instances to the specified Auto Scaling group.

When you attach instances, Amazon EC2 Auto Scaling increases the desired capacity of the group by the number of instances being attached. If the number of instances being attached plus the desired capacity of the group exceeds the maximum size of the group, the operation fails.

If there is a Classic Load Balancer attached to your Auto Scaling group, the instances are also registered with the load balancer. If there are target groups attached to your Auto Scaling group, the instances are also registered with the target groups.

For more information, see Attach EC2 Instances to Your Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To attach an instance to an Auto Scaling group


# This example attaches the specified instance to the specified Auto Scaling group.

resp = client.attach_instances({
  auto_scaling_group_name: "my-auto-scaling-group", 
  instance_ids: [
    "i-93633f9b", 
  ], 
})

Request syntax with placeholder values


resp = client.attach_instances({
  instance_ids: ["XmlStringMaxLen19"],
  auto_scaling_group_name: "ResourceName", # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :instance_ids (Array<String>) —

    The IDs of the instances. You can specify up to 20 instances.

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 309

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

#attach_load_balancer_target_groups(params = {}) ⇒ Struct

Attaches one or more target groups to the specified Auto Scaling group.

To describe the target groups for an Auto Scaling group, use DescribeLoadBalancerTargetGroups. To detach the target group from the Auto Scaling group, use DetachLoadBalancerTargetGroups.

With Application Load Balancers and Network Load Balancers, instances are registered as targets with a target group. With Classic Load Balancers, instances are registered with the load balancer. For more information, see Attaching a Load Balancer to Your Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To attach a target group to an Auto Scaling group


# This example attaches the specified target group to the specified Auto Scaling group.

resp = client.attach_load_balancer_target_groups({
  auto_scaling_group_name: "my-auto-scaling-group", 
  target_group_arns: [
    "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067", 
  ], 
})

Request syntax with placeholder values


resp = client.attach_load_balancer_target_groups({
  auto_scaling_group_name: "ResourceName", # required
  target_group_arns: ["XmlStringMaxLen511"], # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

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

    The Amazon Resource Names (ARN) of the target groups. You can specify up to 10 target groups.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 363

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

#attach_load_balancers(params = {}) ⇒ Struct

Attaches one or more Classic Load Balancers to the specified Auto Scaling group.

To attach an Application Load Balancer or a Network Load Balancer instead, see AttachLoadBalancerTargetGroups.

To describe the load balancers for an Auto Scaling group, use DescribeLoadBalancers. To detach the load balancer from the Auto Scaling group, use DetachLoadBalancers.

For more information, see Attaching a Load Balancer to Your Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To attach a load balancer to an Auto Scaling group


# This example attaches the specified load balancer to the specified Auto Scaling group.

resp = client.attach_load_balancers({
  auto_scaling_group_name: "my-auto-scaling-group", 
  load_balancer_names: [
    "my-load-balancer", 
  ], 
})

Request syntax with placeholder values


resp = client.attach_load_balancers({
  auto_scaling_group_name: "ResourceName", # required
  load_balancer_names: ["XmlStringMaxLen255"], # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

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

    The names of the load balancers. You can specify up to 10 load balancers.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 417

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

#batch_delete_scheduled_action(params = {}) ⇒ Types::BatchDeleteScheduledActionAnswer

Deletes one or more scheduled actions for the specified Auto Scaling group.

Examples:

Request syntax with placeholder values


resp = client.batch_delete_scheduled_action({
  auto_scaling_group_name: "ResourceName", # required
  scheduled_action_names: ["ResourceName"], # required
})

Response structure


resp.failed_scheduled_actions #=> Array
resp.failed_scheduled_actions[0].scheduled_action_name #=> String
resp.failed_scheduled_actions[0].error_code #=> String
resp.failed_scheduled_actions[0].error_message #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

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

    The names of the scheduled actions to delete. The maximum number allowed is 50.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 454

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

#batch_put_scheduled_update_group_action(params = {}) ⇒ Types::BatchPutScheduledUpdateGroupActionAnswer

Creates or updates one or more scheduled scaling actions for an Auto Scaling group. If you leave a parameter unspecified when updating a scheduled scaling action, the corresponding value remains unchanged.

Examples:

Request syntax with placeholder values


resp = client.batch_put_scheduled_update_group_action({
  auto_scaling_group_name: "ResourceName", # required
  scheduled_update_group_actions: [ # required
    {
      scheduled_action_name: "XmlStringMaxLen255", # required
      start_time: Time.now,
      end_time: Time.now,
      recurrence: "XmlStringMaxLen255",
      min_size: 1,
      max_size: 1,
      desired_capacity: 1,
    },
  ],
})

Response structure


resp.failed_scheduled_update_group_actions #=> Array
resp.failed_scheduled_update_group_actions[0].scheduled_action_name #=> String
resp.failed_scheduled_update_group_actions[0].error_code #=> String
resp.failed_scheduled_update_group_actions[0].error_message #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :scheduled_update_group_actions (required, Array<Types::ScheduledUpdateGroupActionRequest>) —

    One or more scheduled actions. The maximum number allowed is 50.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 501

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

#complete_lifecycle_action(params = {}) ⇒ Struct

Completes the lifecycle action for the specified token or instance with the specified result.

This step is a part of the procedure for adding a lifecycle hook to an Auto Scaling group:

  1. (Optional) Create a Lambda function and a rule that allows CloudWatch Events to invoke your Lambda function when Amazon EC2 Auto Scaling launches or terminates instances.

  2. (Optional) Create a notification target and an IAM role. The target can be either an Amazon SQS queue or an Amazon SNS topic. The role allows Amazon EC2 Auto Scaling to publish lifecycle notifications to the target.

  3. Create the lifecycle hook. Specify whether the hook is used when the instances launch or terminate.

  4. If you need more time, record the lifecycle action heartbeat to keep the instance in a pending state.

  5. If you finish before the timeout period ends, complete the lifecycle action.

For more information, see Amazon EC2 Auto Scaling Lifecycle Hooks in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To complete the lifecycle action


# This example notifies Auto Scaling that the specified lifecycle action is complete so that it can finish launching or
# terminating the instance.

resp = client.complete_lifecycle_action({
  auto_scaling_group_name: "my-auto-scaling-group", 
  lifecycle_action_result: "CONTINUE", 
  lifecycle_action_token: "bcd2f1b8-9a78-44d3-8a7a-4dd07d7cf635", 
  lifecycle_hook_name: "my-lifecycle-hook", 
})

Request syntax with placeholder values


resp = client.complete_lifecycle_action({
  lifecycle_hook_name: "AsciiStringMaxLen255", # required
  auto_scaling_group_name: "ResourceName", # required
  lifecycle_action_token: "LifecycleActionToken",
  lifecycle_action_result: "LifecycleActionResult", # required
  instance_id: "XmlStringMaxLen19",
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :lifecycle_hook_name (required, String) —

    The name of the lifecycle hook.

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :lifecycle_action_token (String) —

    A universally unique identifier (UUID) that identifies a specific lifecycle action associated with an instance. Amazon EC2 Auto Scaling sends this token to the notification target you specified when you created the lifecycle hook.

  • :lifecycle_action_result (required, String) —

    The action for the group to take. This parameter can be either CONTINUE or ABANDON.

  • :instance_id (String) —

    The ID of the instance.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 585

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

#create_auto_scaling_group(params = {}) ⇒ Struct

Creates an Auto Scaling group with the specified name and attributes.

If you exceed your maximum limit of Auto Scaling groups, the call fails. For information about viewing this limit, see DescribeAccountLimits. For information about updating this limit, see Amazon EC2 Auto Scaling Service Quotas in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To create an Auto Scaling group


# This example creates an Auto Scaling group.

resp = client.create_auto_scaling_group({
  auto_scaling_group_name: "my-auto-scaling-group", 
  launch_configuration_name: "my-launch-config", 
  max_size: 3, 
  min_size: 1, 
  vpc_zone_identifier: "subnet-4176792c", 
})

Example: To create an Auto Scaling group with an attached load balancer


# This example creates an Auto Scaling group and attaches the specified Classic Load Balancer.

resp = client.create_auto_scaling_group({
  auto_scaling_group_name: "my-auto-scaling-group", 
  availability_zones: [
    "us-west-2c", 
  ], 
  health_check_grace_period: 120, 
  health_check_type: "ELB", 
  launch_configuration_name: "my-launch-config", 
  load_balancer_names: [
    "my-load-balancer", 
  ], 
  max_size: 3, 
  min_size: 1, 
})

Example: To create an Auto Scaling group with an attached target group


# This example creates an Auto Scaling group and attaches the specified target group.

resp = client.create_auto_scaling_group({
  auto_scaling_group_name: "my-auto-scaling-group", 
  health_check_grace_period: 120, 
  health_check_type: "ELB", 
  launch_configuration_name: "my-launch-config", 
  max_size: 3, 
  min_size: 1, 
  target_group_arns: [
    "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067", 
  ], 
  vpc_zone_identifier: "subnet-4176792c, subnet-65ea5f08", 
})

Request syntax with placeholder values


resp = client.create_auto_scaling_group({
  auto_scaling_group_name: "XmlStringMaxLen255", # required
  launch_configuration_name: "ResourceName",
  launch_template: {
    launch_template_id: "XmlStringMaxLen255",
    launch_template_name: "LaunchTemplateName",
    version: "XmlStringMaxLen255",
  },
  mixed_instances_policy: {
    launch_template: {
      launch_template_specification: {
        launch_template_id: "XmlStringMaxLen255",
        launch_template_name: "LaunchTemplateName",
        version: "XmlStringMaxLen255",
      },
      overrides: [
        {
          instance_type: "XmlStringMaxLen255",
          weighted_capacity: "XmlStringMaxLen32",
        },
      ],
    },
    instances_distribution: {
      on_demand_allocation_strategy: "XmlString",
      on_demand_base_capacity: 1,
      on_demand_percentage_above_base_capacity: 1,
      spot_allocation_strategy: "XmlString",
      spot_instance_pools: 1,
      spot_max_price: "MixedInstanceSpotPrice",
    },
  },
  instance_id: "XmlStringMaxLen19",
  min_size: 1, # required
  max_size: 1, # required
  desired_capacity: 1,
  default_cooldown: 1,
  availability_zones: ["XmlStringMaxLen255"],
  load_balancer_names: ["XmlStringMaxLen255"],
  target_group_arns: ["XmlStringMaxLen511"],
  health_check_type: "XmlStringMaxLen32",
  health_check_grace_period: 1,
  placement_group: "XmlStringMaxLen255",
  vpc_zone_identifier: "XmlStringMaxLen2047",
  termination_policies: ["XmlStringMaxLen1600"],
  new_instances_protected_from_scale_in: false,
  lifecycle_hook_specification_list: [
    {
      lifecycle_hook_name: "AsciiStringMaxLen255", # required
      lifecycle_transition: "LifecycleTransition", # required
      notification_metadata: "XmlStringMaxLen1023",
      heartbeat_timeout: 1,
      default_result: "LifecycleActionResult",
      notification_target_arn: "NotificationTargetResourceName",
      role_arn: "ResourceName",
    },
  ],
  tags: [
    {
      resource_id: "XmlString",
      resource_type: "XmlString",
      key: "TagKey", # required
      value: "TagValue",
      propagate_at_launch: false,
    },
  ],
  service_linked_role_arn: "ResourceName",
  max_instance_lifetime: 1,
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group. This name must be unique per Region per account.

  • :launch_configuration_name (String) —

    The name of the launch configuration.

    If you do not specify LaunchConfigurationName, you must specify one of the following parameters: InstanceId, LaunchTemplate, or MixedInstancesPolicy.

  • :launch_template (Types::LaunchTemplateSpecification) —

    The launch template to use to launch instances.

    For more information, see LaunchTemplateSpecification in the Amazon EC2 Auto Scaling API Reference.

    If you do not specify LaunchTemplate, you must specify one of the following parameters: InstanceId, LaunchConfigurationName, or MixedInstancesPolicy.

  • :mixed_instances_policy (Types::MixedInstancesPolicy) —

    An embedded object that specifies a mixed instances policy. The required parameters must be specified. If optional parameters are unspecified, their default values are used.

    The policy includes parameters that not only define the distribution of On-Demand Instances and Spot Instances, the maximum price to pay for Spot Instances, and how the Auto Scaling group allocates instance types to fulfill On-Demand and Spot capacity, but also the parameters that specify the instance configuration information—the launch template and instance types.

    For more information, see MixedInstancesPolicy in the Amazon EC2 Auto Scaling API Reference and Auto Scaling Groups with Multiple Instance Types and Purchase Options in the Amazon EC2 Auto Scaling User Guide.

    You must specify one of the following parameters in your request: LaunchConfigurationName, LaunchTemplate, InstanceId, or MixedInstancesPolicy.

  • :instance_id (String) —

    The ID of the instance used to create a launch configuration for the group.

    When you specify an ID of an instance, Amazon EC2 Auto Scaling creates a new launch configuration and associates it with the group. This launch configuration derives its attributes from the specified instance, except for the block device mapping.

    For more information, see Create an Auto Scaling Group Using an EC2 Instance in the Amazon EC2 Auto Scaling User Guide.

    You must specify one of the following parameters in your request: LaunchConfigurationName, LaunchTemplate, InstanceId, or MixedInstancesPolicy.

  • :min_size (required, Integer) —

    The minimum size of the group.

  • :max_size (required, Integer) —

    The maximum size of the group.

  • :desired_capacity (Integer) —

    The number of Amazon EC2 instances that the Auto Scaling group attempts to maintain. This number must be greater than or equal to the minimum size of the group and less than or equal to the maximum size of the group. If you do not specify a desired capacity, the default is the minimum size of the group.

  • :default_cooldown (Integer) —

    The amount of time, in seconds, after a scaling activity completes before another scaling activity can start. The default value is 300.

    For more information, see Scaling Cooldowns in the Amazon EC2 Auto Scaling User Guide.

  • :availability_zones (Array<String>) —

    One or more Availability Zones for the group. This parameter is optional if you specify one or more subnets for VPCZoneIdentifier.

    Conditional: If your account supports EC2-Classic and VPC, this parameter is required to launch instances into EC2-Classic.

  • :load_balancer_names (Array<String>) —

    A list of Classic Load Balancers associated with this Auto Scaling group. For Application Load Balancers and Network Load Balancers, specify a list of target groups using the TargetGroupARNs property instead.

    For more information, see Using a Load Balancer with an Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

  • :target_group_arns (Array<String>) —

    The Amazon Resource Names (ARN) of the target groups to associate with the Auto Scaling group. Instances are registered as targets in a target group, and traffic is routed to the target group.

    For more information, see Using a Load Balancer with an Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

  • :health_check_type (String) —

    The service to use for the health checks. The valid values are EC2 and ELB. The default value is EC2. If you configure an Auto Scaling group to use ELB health checks, it considers the instance unhealthy if it fails either the EC2 status checks or the load balancer health checks.

    For more information, see Health Checks for Auto Scaling Instances in the Amazon EC2 Auto Scaling User Guide.

  • :health_check_grace_period (Integer) —

    The amount of time, in seconds, that Amazon EC2 Auto Scaling waits before checking the health status of an EC2 instance that has come into service. During this time, any health check failures for the instance are ignored. The default value is 0.

    For more information, see Health Check Grace Period in the Amazon EC2 Auto Scaling User Guide.

    Conditional: This parameter is required if you are adding an ELB health check.

  • :placement_group (String) —

    The name of the placement group into which to launch your instances, if any. A placement group is a logical grouping of instances within a single Availability Zone. You cannot specify multiple Availability Zones and a placement group. For more information, see Placement Groups in the Amazon EC2 User Guide for Linux Instances.

  • :vpc_zone_identifier (String) —

    A comma-separated list of subnet IDs for your virtual private cloud (VPC).

    If you specify VPCZoneIdentifier with AvailabilityZones, the subnets that you specify for this parameter must reside in those Availability Zones.

    Conditional: If your account supports EC2-Classic and VPC, this parameter is required to launch instances into a VPC.

  • :termination_policies (Array<String>) —

    One or more termination policies used to select the instance to terminate. These policies are executed in the order that they are listed.

    For more information, see Controlling Which Instances Auto Scaling Terminates During Scale In in the Amazon EC2 Auto Scaling User Guide.

  • :new_instances_protected_from_scale_in (Boolean) —

    Indicates whether newly launched instances are protected from termination by Amazon EC2 Auto Scaling when scaling in.

    For more information about preventing instances from terminating on scale in, see Instance Protection in the Amazon EC2 Auto Scaling User Guide.

  • :lifecycle_hook_specification_list (Array<Types::LifecycleHookSpecification>) —

    One or more lifecycle hooks.

  • :tags (Array<Types::Tag>) —

    One or more tags.

    For more information, see Tagging Auto Scaling Groups and Instances in the Amazon EC2 Auto Scaling User Guide.

  • :service_linked_role_arn (String) —

    The Amazon Resource Name (ARN) of the service-linked role that the Auto Scaling group uses to call other AWS services on your behalf. By default, Amazon EC2 Auto Scaling uses a service-linked role named AWSServiceRoleForAutoScaling, which it creates if it does not exist. For more information, see Service-Linked Roles in the Amazon EC2 Auto Scaling User Guide.

  • :max_instance_lifetime (Integer) —

    The maximum amount of time, in seconds, that an instance can be in service.

    For more information, see Replacing Auto Scaling Instances Based on Maximum Instance Lifetime in the Amazon EC2 Auto Scaling User Guide.

    Valid Range: Minimum value of 604800.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 971

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

#create_launch_configuration(params = {}) ⇒ Struct

Creates a launch configuration.

If you exceed your maximum limit of launch configurations, the call fails. For information about viewing this limit, see DescribeAccountLimits. For information about updating this limit, see Amazon EC2 Auto Scaling Service Quotas in the Amazon EC2 Auto Scaling User Guide.

For more information, see Launch Configurations in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To create a launch configuration


# This example creates a launch configuration.

resp = client.create_launch_configuration({
  iam_instance_profile: "my-iam-role", 
  image_id: "ami-12345678", 
  instance_type: "m3.medium", 
  launch_configuration_name: "my-launch-config", 
  security_groups: [
    "sg-eb2af88e", 
  ], 
})

Request syntax with placeholder values


resp = client.create_launch_configuration({
  launch_configuration_name: "XmlStringMaxLen255", # required
  image_id: "XmlStringMaxLen255",
  key_name: "XmlStringMaxLen255",
  security_groups: ["XmlString"],
  classic_link_vpc_id: "XmlStringMaxLen255",
  classic_link_vpc_security_groups: ["XmlStringMaxLen255"],
  user_data: "XmlStringUserData",
  instance_id: "XmlStringMaxLen19",
  instance_type: "XmlStringMaxLen255",
  kernel_id: "XmlStringMaxLen255",
  ramdisk_id: "XmlStringMaxLen255",
  block_device_mappings: [
    {
      virtual_name: "XmlStringMaxLen255",
      device_name: "XmlStringMaxLen255", # required
      ebs: {
        snapshot_id: "XmlStringMaxLen255",
        volume_size: 1,
        volume_type: "BlockDeviceEbsVolumeType",
        delete_on_termination: false,
        iops: 1,
        encrypted: false,
      },
      no_device: false,
    },
  ],
  instance_monitoring: {
    enabled: false,
  },
  spot_price: "SpotPrice",
  iam_instance_profile: "XmlStringMaxLen1600",
  ebs_optimized: false,
  associate_public_ip_address: false,
  placement_tenancy: "XmlStringMaxLen64",
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :launch_configuration_name (required, String) —

    The name of the launch configuration. This name must be unique per Region per account.

  • :image_id (String) —

    The ID of the Amazon Machine Image (AMI) that was assigned during registration. For more information, see Finding an AMI in the Amazon EC2 User Guide for Linux Instances.

    If you do not specify InstanceId, you must specify ImageId.

  • :key_name (String) —

    The name of the key pair. For more information, see Amazon EC2 Key Pairs in the Amazon EC2 User Guide for Linux Instances.

  • :security_groups (Array<String>) —

    A list that contains the security groups to assign to the instances in the Auto Scaling group.

    [EC2-VPC] Specify the security group IDs. For more information, see Security Groups for Your VPC in the Amazon Virtual Private Cloud User Guide.

    [EC2-Classic] Specify either the security group names or the security group IDs. For more information, see Amazon EC2 Security Groups in the Amazon EC2 User Guide for Linux Instances.

  • :classic_link_vpc_id (String) —

    The ID of a ClassicLink-enabled VPC to link your EC2-Classic instances to. For more information, see ClassicLink in the Amazon EC2 User Guide for Linux Instances and Linking EC2-Classic Instances to a VPC in the Amazon EC2 Auto Scaling User Guide.

    This parameter can only be used if you are launching EC2-Classic instances.

  • :classic_link_vpc_security_groups (Array<String>) —

    The IDs of one or more security groups for the specified ClassicLink-enabled VPC. For more information, see ClassicLink in the Amazon EC2 User Guide for Linux Instances and Linking EC2-Classic Instances to a VPC in the Amazon EC2 Auto Scaling User Guide.

    If you specify the ClassicLinkVPCId parameter, you must specify this parameter.

  • :user_data (String) —

    The Base64-encoded user data to make available to the launched EC2 instances. For more information, see Instance Metadata and User Data in the Amazon EC2 User Guide for Linux Instances.

  • :instance_id (String) —

    The ID of the instance to use to create the launch configuration. The new launch configuration derives attributes from the instance, except for the block device mapping.

    To create a launch configuration with a block device mapping or override any other instance attributes, specify them as part of the same request.

    For more information, see Create a Launch Configuration Using an EC2 Instance in the Amazon EC2 Auto Scaling User Guide.

    If you do not specify InstanceId, you must specify both ImageId and InstanceType.

  • :instance_type (String) —

    Specifies the instance type of the EC2 instance.

    For information about available instance types, see Available Instance Types in the Amazon EC2 User Guide for Linux Instances.

    If you do not specify InstanceId, you must specify InstanceType.

  • :kernel_id (String) —

    The ID of the kernel associated with the AMI.

  • :ramdisk_id (String) —

    The ID of the RAM disk to select.

  • :block_device_mappings (Array<Types::BlockDeviceMapping>) —

    A block device mapping, which specifies the block devices for the instance. You can specify virtual devices and EBS volumes. For more information, see Block Device Mapping in the Amazon EC2 User Guide for Linux Instances.

  • :instance_monitoring (Types::InstanceMonitoring) —

    Controls whether instances in this group are launched with detailed (true) or basic (false) monitoring.

    The default value is true (enabled).

    When detailed monitoring is enabled, Amazon CloudWatch generates metrics every minute and your account is charged a fee. When you disable detailed monitoring, CloudWatch generates metrics every 5 minutes. For more information, see Configure Monitoring for Auto Scaling Instances in the Amazon EC2 Auto Scaling User Guide.

  • :spot_price (String) —

    The maximum hourly price to be paid for any Spot Instance launched to fulfill the request. Spot Instances are launched when the price you specify exceeds the current Spot price. For more information, see Launching Spot Instances in Your Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

    When you change your maximum price by creating a new launch configuration, running instances will continue to run as long as the maximum price for those running instances is higher than the current Spot price.

  • :iam_instance_profile (String) —

    The name or the Amazon Resource Name (ARN) of the instance profile associated with the IAM role for the instance. The instance profile contains the IAM role.

    For more information, see IAM Role for Applications That Run on Amazon EC2 Instances in the Amazon EC2 Auto Scaling User Guide.

  • :ebs_optimized (Boolean) —

    Specifies whether the launch configuration is optimized for EBS I/O (true) or not (false). The optimization provides dedicated throughput to Amazon EBS and an optimized configuration stack to provide optimal I/O performance. This optimization is not available with all instance types. Additional fees are incurred when you enable EBS optimization for an instance type that is not EBS-optimized by default. For more information, see Amazon EBS-Optimized Instances in the Amazon EC2 User Guide for Linux Instances.

    The default value is false.

  • :associate_public_ip_address (Boolean) —

    For Auto Scaling groups that are running in a virtual private cloud (VPC), specifies whether to assign a public IP address to the group's instances. If you specify true, each instance in the Auto Scaling group receives a unique public IP address. For more information, see Launching Auto Scaling Instances in a VPC in the Amazon EC2 Auto Scaling User Guide.

    If you specify this parameter, you must specify at least one subnet for VPCZoneIdentifier when you create your group.

    If the instance is launched into a default subnet, the default is to assign a public IP address, unless you disabled the option to assign a public IP address on the subnet. If the instance is launched into a nondefault subnet, the default is not to assign a public IP address, unless you enabled the option to assign a public IP address on the subnet.

  • :placement_tenancy (String) —

    The tenancy of the instance. An instance with dedicated tenancy runs on isolated, single-tenant hardware and can only be launched into a VPC.

    To launch dedicated instances into a shared tenancy VPC (a VPC with the instance placement tenancy attribute set to default), you must set the value of this parameter to dedicated.

    If you specify PlacementTenancy, you must specify at least one subnet for VPCZoneIdentifier when you create your group.

    For more information, see Instance Placement Tenancy in the Amazon EC2 Auto Scaling User Guide.

    Valid Values: default | dedicated

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1284

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

#create_or_update_tags(params = {}) ⇒ Struct

Creates or updates tags for the specified Auto Scaling group.

When you specify a tag with a key that already exists, the operation overwrites the previous tag definition, and you do not get an error message.

For more information, see Tagging Auto Scaling Groups and Instances in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To create or update tags for an Auto Scaling group


# This example adds two tags to the specified Auto Scaling group.

resp = client.create_or_update_tags({
  tags: [
    {
      key: "Role", 
      propagate_at_launch: true, 
      resource_id: "my-auto-scaling-group", 
      resource_type: "auto-scaling-group", 
      value: "WebServer", 
    }, 
    {
      key: "Dept", 
      propagate_at_launch: true, 
      resource_id: "my-auto-scaling-group", 
      resource_type: "auto-scaling-group", 
      value: "Research", 
    }, 
  ], 
})

Request syntax with placeholder values


resp = client.create_or_update_tags({
  tags: [ # required
    {
      resource_id: "XmlString",
      resource_type: "XmlString",
      key: "TagKey", # required
      value: "TagValue",
      propagate_at_launch: false,
    },
  ],
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

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

    One or more tags.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1349

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

#delete_auto_scaling_group(params = {}) ⇒ Struct

Deletes the specified Auto Scaling group.

If the group has instances or scaling activities in progress, you must specify the option to force the deletion in order for it to succeed.

If the group has policies, deleting the group deletes the policies, the underlying alarm actions, and any alarm that no longer has an associated action.

To remove instances from the Auto Scaling group before deleting it, call DetachInstances with the list of instances and the option to decrement the desired capacity. This ensures that Amazon EC2 Auto Scaling does not launch replacement instances.

To terminate all instances before deleting the Auto Scaling group, call UpdateAutoScalingGroup and set the minimum size and desired capacity of the Auto Scaling group to zero.

Examples:

Example: To delete an Auto Scaling group


# This example deletes the specified Auto Scaling group.

resp = client.delete_auto_scaling_group({
  auto_scaling_group_name: "my-auto-scaling-group", 
})

Example: To delete an Auto Scaling group and all its instances


# This example deletes the specified Auto Scaling group and all its instances.

resp = client.delete_auto_scaling_group({
  auto_scaling_group_name: "my-auto-scaling-group", 
  force_delete: true, 
})

Request syntax with placeholder values


resp = client.delete_auto_scaling_group({
  auto_scaling_group_name: "ResourceName", # required
  force_delete: false,
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :force_delete (Boolean) —

    Specifies that the group is to be deleted along with all instances associated with the group, without waiting for all instances to be terminated. This parameter also deletes any lifecycle actions associated with the group.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1412

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

#delete_launch_configuration(params = {}) ⇒ Struct

Deletes the specified launch configuration.

The launch configuration must not be attached to an Auto Scaling group. When this call completes, the launch configuration is no longer available for use.

Examples:

Example: To delete a launch configuration


# This example deletes the specified launch configuration.

resp = client.delete_launch_configuration({
  launch_configuration_name: "my-launch-config", 
})

Request syntax with placeholder values


resp = client.delete_launch_configuration({
  launch_configuration_name: "ResourceName", # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :launch_configuration_name (required, String) —

    The name of the launch configuration.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1447

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

#delete_lifecycle_hook(params = {}) ⇒ Struct

Deletes the specified lifecycle hook.

If there are any outstanding lifecycle actions, they are completed first (ABANDON for launching instances, CONTINUE for terminating instances).

Examples:

Example: To delete a lifecycle hook


# This example deletes the specified lifecycle hook.

resp = client.delete_lifecycle_hook({
  auto_scaling_group_name: "my-auto-scaling-group", 
  lifecycle_hook_name: "my-lifecycle-hook", 
})

Request syntax with placeholder values


resp = client.delete_lifecycle_hook({
  lifecycle_hook_name: "AsciiStringMaxLen255", # required
  auto_scaling_group_name: "ResourceName", # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :lifecycle_hook_name (required, String) —

    The name of the lifecycle hook.

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1487

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

#delete_notification_configuration(params = {}) ⇒ Struct

Deletes the specified notification.

Examples:

Example: To delete an Auto Scaling notification


# This example deletes the specified notification from the specified Auto Scaling group.

resp = client.delete_notification_configuration({
  auto_scaling_group_name: "my-auto-scaling-group", 
  topic_arn: "arn:aws:sns:us-west-2:123456789012:my-sns-topic", 
})

Request syntax with placeholder values


resp = client.delete_notification_configuration({
  auto_scaling_group_name: "ResourceName", # required
  topic_arn: "ResourceName", # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :topic_arn (required, String) —

    The Amazon Resource Name (ARN) of the Amazon Simple Notification Service (Amazon SNS) topic.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1524

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

#delete_policy(params = {}) ⇒ Struct

Deletes the specified scaling policy.

Deleting either a step scaling policy or a simple scaling policy deletes the underlying alarm action, but does not delete the alarm, even if it no longer has an associated action.

For more information, see Deleting a Scaling Policy in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To delete an Auto Scaling policy


# This example deletes the specified Auto Scaling policy.

resp = client.delete_policy({
  auto_scaling_group_name: "my-auto-scaling-group", 
  policy_name: "ScaleIn", 
})

Request syntax with placeholder values


resp = client.delete_policy({
  auto_scaling_group_name: "ResourceName",
  policy_name: "ResourceName", # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (String) —

    The name of the Auto Scaling group.

  • :policy_name (required, String) —

    The name or Amazon Resource Name (ARN) of the policy.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1571

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

#delete_scheduled_action(params = {}) ⇒ Struct

Deletes the specified scheduled action.

Examples:

Example: To delete a scheduled action from an Auto Scaling group


# This example deletes the specified scheduled action from the specified Auto Scaling group.

resp = client.delete_scheduled_action({
  auto_scaling_group_name: "my-auto-scaling-group", 
  scheduled_action_name: "my-scheduled-action", 
})

Request syntax with placeholder values


resp = client.delete_scheduled_action({
  auto_scaling_group_name: "ResourceName", # required
  scheduled_action_name: "ResourceName", # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :scheduled_action_name (required, String) —

    The name of the action to delete.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1607

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

#delete_tags(params = {}) ⇒ Struct

Deletes the specified tags.

Examples:

Example: To delete a tag from an Auto Scaling group


# This example deletes the specified tag from the specified Auto Scaling group.

resp = client.delete_tags({
  tags: [
    {
      key: "Dept", 
      resource_id: "my-auto-scaling-group", 
      resource_type: "auto-scaling-group", 
      value: "Research", 
    }, 
  ], 
})

Request syntax with placeholder values


resp = client.delete_tags({
  tags: [ # required
    {
      resource_id: "XmlString",
      resource_type: "XmlString",
      key: "TagKey", # required
      value: "TagValue",
      propagate_at_launch: false,
    },
  ],
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

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

    One or more tags.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1653

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

#describe_account_limits(params = {}) ⇒ Types::DescribeAccountLimitsAnswer

Describes the current Amazon EC2 Auto Scaling resource quotas for your AWS account.

For information about requesting an increase, see Amazon EC2 Auto Scaling Service Quotas in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To describe your Auto Scaling account limits


# This example describes the Auto Scaling limits for your AWS account.

resp = client.({
})

resp.to_h outputs the following:
{
  max_number_of_auto_scaling_groups: 20, 
  max_number_of_launch_configurations: 100, 
  number_of_auto_scaling_groups: 3, 
  number_of_launch_configurations: 5, 
}

Response structure


resp.max_number_of_auto_scaling_groups #=> Integer
resp.max_number_of_launch_configurations #=> Integer
resp.number_of_auto_scaling_groups #=> Integer
resp.number_of_launch_configurations #=> Integer

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1703

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

#describe_adjustment_types(params = {}) ⇒ Types::DescribeAdjustmentTypesAnswer

Describes the policy adjustment types for use with PutScalingPolicy.

Examples:

Example: To describe the Auto Scaling adjustment types


# This example describes the available adjustment types.

resp = client.describe_adjustment_types({
})

resp.to_h outputs the following:
{
  adjustment_types: [
    {
      adjustment_type: "ChangeInCapacity", 
    }, 
    {
      adjustment_type: "ExactCapcity", 
    }, 
    {
      adjustment_type: "PercentChangeInCapacity", 
    }, 
  ], 
}

Response structure


resp.adjustment_types #=> Array
resp.adjustment_types[0].adjustment_type #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1746

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

#describe_auto_scaling_groups(params = {}) ⇒ Types::AutoScalingGroupsType

Describes one or more Auto Scaling groups.

Examples:

Example: To describe an Auto Scaling group


# This example describes the specified Auto Scaling group.

resp = client.describe_auto_scaling_groups({
  auto_scaling_group_names: [
    "my-auto-scaling-group", 
  ], 
})

resp.to_h outputs the following:
{
  auto_scaling_groups: [
    {
      auto_scaling_group_arn: "arn:aws:autoscaling:us-west-2:123456789012:autoScalingGroup:930d940e-891e-4781-a11a-7b0acd480f03:autoScalingGroupName/my-auto-scaling-group", 
      auto_scaling_group_name: "my-auto-scaling-group", 
      availability_zones: [
        "us-west-2c", 
      ], 
      created_time: Time.parse("2013-08-19T20:53:25.584Z"), 
      default_cooldown: 300, 
      desired_capacity: 1, 
      enabled_metrics: [
      ], 
      health_check_grace_period: 300, 
      health_check_type: "EC2", 
      instances: [
        {
          availability_zone: "us-west-2c", 
          health_status: "Healthy", 
          instance_id: "i-4ba0837f", 
          launch_configuration_name: "my-launch-config", 
          lifecycle_state: "InService", 
          protected_from_scale_in: false, 
        }, 
      ], 
      launch_configuration_name: "my-launch-config", 
      load_balancer_names: [
      ], 
      max_size: 1, 
      min_size: 0, 
      new_instances_protected_from_scale_in: false, 
      suspended_processes: [
      ], 
      tags: [
      ], 
      termination_policies: [
        "Default", 
      ], 
      vpc_zone_identifier: "subnet-12345678", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_auto_scaling_groups({
  auto_scaling_group_names: ["ResourceName"],
  next_token: "XmlString",
  max_records: 1,
})

Response structure


resp.auto_scaling_groups #=> Array
resp.auto_scaling_groups[0].auto_scaling_group_name #=> String
resp.auto_scaling_groups[0].auto_scaling_group_arn #=> String
resp.auto_scaling_groups[0].launch_configuration_name #=> String
resp.auto_scaling_groups[0].launch_template.launch_template_id #=> String
resp.auto_scaling_groups[0].launch_template.launch_template_name #=> String
resp.auto_scaling_groups[0].launch_template.version #=> String
resp.auto_scaling_groups[0].mixed_instances_policy.launch_template.launch_template_specification.launch_template_id #=> String
resp.auto_scaling_groups[0].mixed_instances_policy.launch_template.launch_template_specification.launch_template_name #=> String
resp.auto_scaling_groups[0].mixed_instances_policy.launch_template.launch_template_specification.version #=> String
resp.auto_scaling_groups[0].mixed_instances_policy.launch_template.overrides #=> Array
resp.auto_scaling_groups[0].mixed_instances_policy.launch_template.overrides[0].instance_type #=> String
resp.auto_scaling_groups[0].mixed_instances_policy.launch_template.overrides[0].weighted_capacity #=> String
resp.auto_scaling_groups[0].mixed_instances_policy.instances_distribution.on_demand_allocation_strategy #=> String
resp.auto_scaling_groups[0].mixed_instances_policy.instances_distribution.on_demand_base_capacity #=> Integer
resp.auto_scaling_groups[0].mixed_instances_policy.instances_distribution.on_demand_percentage_above_base_capacity #=> Integer
resp.auto_scaling_groups[0].mixed_instances_policy.instances_distribution.spot_allocation_strategy #=> String
resp.auto_scaling_groups[0].mixed_instances_policy.instances_distribution.spot_instance_pools #=> Integer
resp.auto_scaling_groups[0].mixed_instances_policy.instances_distribution.spot_max_price #=> String
resp.auto_scaling_groups[0].min_size #=> Integer
resp.auto_scaling_groups[0].max_size #=> Integer
resp.auto_scaling_groups[0].desired_capacity #=> Integer
resp.auto_scaling_groups[0].default_cooldown #=> Integer
resp.auto_scaling_groups[0].availability_zones #=> Array
resp.auto_scaling_groups[0].availability_zones[0] #=> String
resp.auto_scaling_groups[0].load_balancer_names #=> Array
resp.auto_scaling_groups[0].load_balancer_names[0] #=> String
resp.auto_scaling_groups[0].target_group_arns #=> Array
resp.auto_scaling_groups[0].target_group_arns[0] #=> String
resp.auto_scaling_groups[0].health_check_type #=> String
resp.auto_scaling_groups[0].health_check_grace_period #=> Integer
resp.auto_scaling_groups[0].instances #=> Array
resp.auto_scaling_groups[0].instances[0].instance_id #=> String
resp.auto_scaling_groups[0].instances[0].instance_type #=> String
resp.auto_scaling_groups[0].instances[0].availability_zone #=> String
resp.auto_scaling_groups[0].instances[0].lifecycle_state #=> String, one of "Pending", "Pending:Wait", "Pending:Proceed", "Quarantined", "InService", "Terminating", "Terminating:Wait", "Terminating:Proceed", "Terminated", "Detaching", "Detached", "EnteringStandby", "Standby"
resp.auto_scaling_groups[0].instances[0].health_status #=> String
resp.auto_scaling_groups[0].instances[0].launch_configuration_name #=> String
resp.auto_scaling_groups[0].instances[0].launch_template.launch_template_id #=> String
resp.auto_scaling_groups[0].instances[0].launch_template.launch_template_name #=> String
resp.auto_scaling_groups[0].instances[0].launch_template.version #=> String
resp.auto_scaling_groups[0].instances[0].protected_from_scale_in #=> Boolean
resp.auto_scaling_groups[0].instances[0].weighted_capacity #=> String
resp.auto_scaling_groups[0].created_time #=> Time
resp.auto_scaling_groups[0].suspended_processes #=> Array
resp.auto_scaling_groups[0].suspended_processes[0].process_name #=> String
resp.auto_scaling_groups[0].suspended_processes[0].suspension_reason #=> String
resp.auto_scaling_groups[0].placement_group #=> String
resp.auto_scaling_groups[0].vpc_zone_identifier #=> String
resp.auto_scaling_groups[0].enabled_metrics #=> Array
resp.auto_scaling_groups[0].enabled_metrics[0].metric #=> String
resp.auto_scaling_groups[0].enabled_metrics[0].granularity #=> String
resp.auto_scaling_groups[0].status #=> String
resp.auto_scaling_groups[0].tags #=> Array
resp.auto_scaling_groups[0].tags[0].resource_id #=> String
resp.auto_scaling_groups[0].tags[0].resource_type #=> String
resp.auto_scaling_groups[0].tags[0].key #=> String
resp.auto_scaling_groups[0].tags[0].value #=> String
resp.auto_scaling_groups[0].tags[0].propagate_at_launch #=> Boolean
resp.auto_scaling_groups[0].termination_policies #=> Array
resp.auto_scaling_groups[0].termination_policies[0] #=> String
resp.auto_scaling_groups[0].new_instances_protected_from_scale_in #=> Boolean
resp.auto_scaling_groups[0].service_linked_role_arn #=> String
resp.auto_scaling_groups[0].max_instance_lifetime #=> Integer
resp.next_token #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_names (Array<String>) —

    The names of the Auto Scaling groups. Each name can be a maximum of 1600 characters. By default, you can only specify up to 50 names. You can optionally increase this limit using the MaxRecords parameter.

    If you omit this parameter, all Auto Scaling groups are described.

  • :next_token (String) —

    The token for the next set of items to return. (You received this token from a previous call.)

  • :max_records (Integer) —

    The maximum number of items to return with this call. The default value is 50 and the maximum value is 100.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1908

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

#describe_auto_scaling_instances(params = {}) ⇒ Types::AutoScalingInstancesType

Describes one or more Auto Scaling instances.

Examples:

Example: To describe one or more Auto Scaling instances


# This example describes the specified Auto Scaling instance.

resp = client.describe_auto_scaling_instances({
  instance_ids: [
    "i-4ba0837f", 
  ], 
})

resp.to_h outputs the following:
{
  auto_scaling_instances: [
    {
      auto_scaling_group_name: "my-auto-scaling-group", 
      availability_zone: "us-west-2c", 
      health_status: "HEALTHY", 
      instance_id: "i-4ba0837f", 
      launch_configuration_name: "my-launch-config", 
      lifecycle_state: "InService", 
      protected_from_scale_in: false, 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_auto_scaling_instances({
  instance_ids: ["XmlStringMaxLen19"],
  max_records: 1,
  next_token: "XmlString",
})

Response structure


resp.auto_scaling_instances #=> Array
resp.auto_scaling_instances[0].instance_id #=> String
resp.auto_scaling_instances[0].instance_type #=> String
resp.auto_scaling_instances[0].auto_scaling_group_name #=> String
resp.auto_scaling_instances[0].availability_zone #=> String
resp.auto_scaling_instances[0].lifecycle_state #=> String
resp.auto_scaling_instances[0].health_status #=> String
resp.auto_scaling_instances[0].launch_configuration_name #=> String
resp.auto_scaling_instances[0].launch_template.launch_template_id #=> String
resp.auto_scaling_instances[0].launch_template.launch_template_name #=> String
resp.auto_scaling_instances[0].launch_template.version #=> String
resp.auto_scaling_instances[0].protected_from_scale_in #=> Boolean
resp.auto_scaling_instances[0].weighted_capacity #=> String
resp.next_token #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :instance_ids (Array<String>) —

    The IDs of the instances. You can specify up to MaxRecords IDs. If you omit this parameter, all Auto Scaling instances are described. If you specify an ID that does not exist, it is ignored with no error.

  • :max_records (Integer) —

    The maximum number of items to return with this call. The default value is 50 and the maximum value is 50.

  • :next_token (String) —

    The token for the next set of items to return. (You received this token from a previous call.)

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 1988

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

#describe_auto_scaling_notification_types(params = {}) ⇒ Types::DescribeAutoScalingNotificationTypesAnswer

Describes the notification types that are supported by Amazon EC2 Auto Scaling.

Examples:

Example: To describe the Auto Scaling notification types


# This example describes the available notification types.

resp = client.describe_auto_scaling_notification_types({
})

resp.to_h outputs the following:
{
  auto_scaling_notification_types: [
    "autoscaling:EC2_INSTANCE_LAUNCH", 
    "autoscaling:EC2_INSTANCE_LAUNCH_ERROR", 
    "autoscaling:EC2_INSTANCE_TERMINATE", 
    "autoscaling:EC2_INSTANCE_TERMINATE_ERROR", 
    "autoscaling:TEST_NOTIFICATION", 
  ], 
}

Response structure


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

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2028

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

#describe_launch_configurations(params = {}) ⇒ Types::LaunchConfigurationsType

Describes one or more launch configurations.

Examples:

Example: To describe Auto Scaling launch configurations


# This example describes the specified launch configuration.

resp = client.describe_launch_configurations({
  launch_configuration_names: [
    "my-launch-config", 
  ], 
})

resp.to_h outputs the following:
{
  launch_configurations: [
    {
      associate_public_ip_address: true, 
      block_device_mappings: [
      ], 
      created_time: Time.parse("2014-05-07T17:39:28.599Z"), 
      ebs_optimized: false, 
      image_id: "ami-043a5034", 
      instance_monitoring: {
        enabled: true, 
      }, 
      instance_type: "t1.micro", 
      launch_configuration_arn: "arn:aws:autoscaling:us-west-2:123456789012:launchConfiguration:98d3b196-4cf9-4e88-8ca1-8547c24ced8b:launchConfigurationName/my-launch-config", 
      launch_configuration_name: "my-launch-config", 
      security_groups: [
        "sg-67ef0308", 
      ], 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_launch_configurations({
  launch_configuration_names: ["ResourceName"],
  next_token: "XmlString",
  max_records: 1,
})

Response structure


resp.launch_configurations #=> Array
resp.launch_configurations[0].launch_configuration_name #=> String
resp.launch_configurations[0].launch_configuration_arn #=> String
resp.launch_configurations[0].image_id #=> String
resp.launch_configurations[0].key_name #=> String
resp.launch_configurations[0].security_groups #=> Array
resp.launch_configurations[0].security_groups[0] #=> String
resp.launch_configurations[0].classic_link_vpc_id #=> String
resp.launch_configurations[0].classic_link_vpc_security_groups #=> Array
resp.launch_configurations[0].classic_link_vpc_security_groups[0] #=> String
resp.launch_configurations[0].user_data #=> String
resp.launch_configurations[0].instance_type #=> String
resp.launch_configurations[0].kernel_id #=> String
resp.launch_configurations[0].ramdisk_id #=> String
resp.launch_configurations[0].block_device_mappings #=> Array
resp.launch_configurations[0].block_device_mappings[0].virtual_name #=> String
resp.launch_configurations[0].block_device_mappings[0].device_name #=> String
resp.launch_configurations[0].block_device_mappings[0].ebs.snapshot_id #=> String
resp.launch_configurations[0].block_device_mappings[0].ebs.volume_size #=> Integer
resp.launch_configurations[0].block_device_mappings[0].ebs.volume_type #=> String
resp.launch_configurations[0].block_device_mappings[0].ebs.delete_on_termination #=> Boolean
resp.launch_configurations[0].block_device_mappings[0].ebs.iops #=> Integer
resp.launch_configurations[0].block_device_mappings[0].ebs.encrypted #=> Boolean
resp.launch_configurations[0].block_device_mappings[0].no_device #=> Boolean
resp.launch_configurations[0].instance_monitoring.enabled #=> Boolean
resp.launch_configurations[0].spot_price #=> String
resp.launch_configurations[0].iam_instance_profile #=> String
resp.launch_configurations[0].created_time #=> Time
resp.launch_configurations[0].ebs_optimized #=> Boolean
resp.launch_configurations[0].associate_public_ip_address #=> Boolean
resp.launch_configurations[0].placement_tenancy #=> String
resp.next_token #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :launch_configuration_names (Array<String>) —

    The launch configuration names. If you omit this parameter, all launch configurations are described.

  • :next_token (String) —

    The token for the next set of items to return. (You received this token from a previous call.)

  • :max_records (Integer) —

    The maximum number of items to return with this call. The default value is 50 and the maximum value is 100.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2133

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

#describe_lifecycle_hook_types(params = {}) ⇒ Types::DescribeLifecycleHookTypesAnswer

Describes the available types of lifecycle hooks.

The following hook types are supported:

  • autoscaling:EC2_INSTANCE_LAUNCHING

  • autoscaling:EC2_INSTANCE_TERMINATING

Examples:

Example: To describe the available types of lifecycle hooks


# This example describes the available lifecycle hook types.

resp = client.describe_lifecycle_hook_types({
})

resp.to_h outputs the following:
{
  lifecycle_hook_types: [
    "autoscaling:EC2_INSTANCE_LAUNCHING", 
    "autoscaling:EC2_INSTANCE_TERMINATING", 
  ], 
}

Response structure


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

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2175

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

#describe_lifecycle_hooks(params = {}) ⇒ Types::DescribeLifecycleHooksAnswer

Describes the lifecycle hooks for the specified Auto Scaling group.

Examples:

Example: To describe your lifecycle hooks


# This example describes the lifecycle hooks for the specified Auto Scaling group.

resp = client.describe_lifecycle_hooks({
  auto_scaling_group_name: "my-auto-scaling-group", 
})

resp.to_h outputs the following:
{
  lifecycle_hooks: [
    {
      auto_scaling_group_name: "my-auto-scaling-group", 
      default_result: "ABANDON", 
      global_timeout: 172800, 
      heartbeat_timeout: 3600, 
      lifecycle_hook_name: "my-lifecycle-hook", 
      lifecycle_transition: "autoscaling:EC2_INSTANCE_LAUNCHING", 
      notification_target_arn: "arn:aws:sns:us-west-2:123456789012:my-sns-topic", 
      role_arn: "arn:aws:iam::123456789012:role/my-auto-scaling-role", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_lifecycle_hooks({
  auto_scaling_group_name: "ResourceName", # required
  lifecycle_hook_names: ["AsciiStringMaxLen255"],
})

Response structure


resp.lifecycle_hooks #=> Array
resp.lifecycle_hooks[0].lifecycle_hook_name #=> String
resp.lifecycle_hooks[0].auto_scaling_group_name #=> String
resp.lifecycle_hooks[0].lifecycle_transition #=> String
resp.lifecycle_hooks[0].notification_target_arn #=> String
resp.lifecycle_hooks[0].role_arn #=> String
resp.lifecycle_hooks[0].notification_metadata #=> String
resp.lifecycle_hooks[0].heartbeat_timeout #=> Integer
resp.lifecycle_hooks[0].global_timeout #=> Integer
resp.lifecycle_hooks[0].default_result #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :lifecycle_hook_names (Array<String>) —

    The names of one or more lifecycle hooks. If you omit this parameter, all lifecycle hooks are described.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2242

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

#describe_load_balancer_target_groups(params = {}) ⇒ Types::DescribeLoadBalancerTargetGroupsResponse

Describes the target groups for the specified Auto Scaling group.

Examples:

Example: To describe the target groups for an Auto Scaling group


# This example describes the target groups attached to the specified Auto Scaling group.

resp = client.describe_load_balancer_target_groups({
  auto_scaling_group_name: "my-auto-scaling-group", 
})

resp.to_h outputs the following:
{
  load_balancer_target_groups: [
    {
      load_balancer_target_group_arn: "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067", 
      state: "Added", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_load_balancer_target_groups({
  auto_scaling_group_name: "ResourceName", # required
  next_token: "XmlString",
  max_records: 1,
})

Response structure


resp.load_balancer_target_groups #=> Array
resp.load_balancer_target_groups[0].load_balancer_target_group_arn #=> String
resp.load_balancer_target_groups[0].state #=> String
resp.next_token #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :next_token (String) —

    The token for the next set of items to return. (You received this token from a previous call.)

  • :max_records (Integer) —

    The maximum number of items to return with this call. The default value is 100 and the maximum value is 100.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2303

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

#describe_load_balancers(params = {}) ⇒ Types::DescribeLoadBalancersResponse

Describes the load balancers for the specified Auto Scaling group.

This operation describes only Classic Load Balancers. If you have Application Load Balancers or Network Load Balancers, use DescribeLoadBalancerTargetGroups instead.

Examples:

Example: To describe the load balancers for an Auto Scaling group


# This example describes the load balancers attached to the specified Auto Scaling group.

resp = client.describe_load_balancers({
  auto_scaling_group_name: "my-auto-scaling-group", 
})

resp.to_h outputs the following:
{
  load_balancers: [
    {
      load_balancer_name: "my-load-balancer", 
      state: "Added", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_load_balancers({
  auto_scaling_group_name: "ResourceName", # required
  next_token: "XmlString",
  max_records: 1,
})

Response structure


resp.load_balancers #=> Array
resp.load_balancers[0].load_balancer_name #=> String
resp.load_balancers[0].state #=> String
resp.next_token #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :next_token (String) —

    The token for the next set of items to return. (You received this token from a previous call.)

  • :max_records (Integer) —

    The maximum number of items to return with this call. The default value is 100 and the maximum value is 100.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2368

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

#describe_metric_collection_types(params = {}) ⇒ Types::DescribeMetricCollectionTypesAnswer

Describes the available CloudWatch metrics for Amazon EC2 Auto Scaling.

The GroupStandbyInstances metric is not returned by default. You must explicitly request this metric when calling EnableMetricsCollection.

Examples:

Example: To describe the Auto Scaling metric collection types


# This example describes the available metric collection types.

resp = client.describe_metric_collection_types({
})

resp.to_h outputs the following:
{
  granularities: [
    {
      granularity: "1Minute", 
    }, 
  ], 
  metrics: [
    {
      metric: "GroupMinSize", 
    }, 
    {
      metric: "GroupMaxSize", 
    }, 
    {
      metric: "GroupDesiredCapacity", 
    }, 
    {
      metric: "GroupInServiceInstances", 
    }, 
    {
      metric: "GroupPendingInstances", 
    }, 
    {
      metric: "GroupTerminatingInstances", 
    }, 
    {
      metric: "GroupStandbyInstances", 
    }, 
    {
      metric: "GroupTotalInstances", 
    }, 
  ], 
}

Response structure


resp.metrics #=> Array
resp.metrics[0].metric #=> String
resp.granularities #=> Array
resp.granularities[0].granularity #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2439

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

#describe_notification_configurations(params = {}) ⇒ Types::DescribeNotificationConfigurationsAnswer

Describes the notification actions associated with the specified Auto Scaling group.

Examples:

Example: To describe Auto Scaling notification configurations


# This example describes the notification configurations for the specified Auto Scaling group.

resp = client.describe_notification_configurations({
  auto_scaling_group_names: [
    "my-auto-scaling-group", 
  ], 
})

resp.to_h outputs the following:
{
  notification_configurations: [
    {
      auto_scaling_group_name: "my-auto-scaling-group", 
      notification_type: "autoscaling:TEST_NOTIFICATION", 
      topic_arn: "arn:aws:sns:us-west-2:123456789012:my-sns-topic-2", 
    }, 
    {
      auto_scaling_group_name: "my-auto-scaling-group", 
      notification_type: "autoscaling:TEST_NOTIFICATION", 
      topic_arn: "arn:aws:sns:us-west-2:123456789012:my-sns-topic", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_notification_configurations({
  auto_scaling_group_names: ["ResourceName"],
  next_token: "XmlString",
  max_records: 1,
})

Response structure


resp.notification_configurations #=> Array
resp.notification_configurations[0].auto_scaling_group_name #=> String
resp.notification_configurations[0].topic_arn #=> String
resp.notification_configurations[0].notification_type #=> String
resp.next_token #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_names (Array<String>) —

    The name of the Auto Scaling group.

  • :next_token (String) —

    The token for the next set of items to return. (You received this token from a previous call.)

  • :max_records (Integer) —

    The maximum number of items to return with this call. The default value is 50 and the maximum value is 100.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2510

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

#describe_policies(params = {}) ⇒ Types::PoliciesType

Describes the policies for the specified Auto Scaling group.

Examples:

Example: To describe Auto Scaling policies


# This example describes the policies for the specified Auto Scaling group.

resp = client.describe_policies({
  auto_scaling_group_name: "my-auto-scaling-group", 
})

resp.to_h outputs the following:
{
  scaling_policies: [
    {
      adjustment_type: "ChangeInCapacity", 
      alarms: [
      ], 
      auto_scaling_group_name: "my-auto-scaling-group", 
      policy_arn: "arn:aws:autoscaling:us-west-2:123456789012:scalingPolicy:2233f3d7-6290-403b-b632-93c553560106:autoScalingGroupName/my-auto-scaling-group:policyName/ScaleIn", 
      policy_name: "ScaleIn", 
      scaling_adjustment: -1, 
    }, 
    {
      adjustment_type: "PercentChangeInCapacity", 
      alarms: [
      ], 
      auto_scaling_group_name: "my-auto-scaling-group", 
      cooldown: 60, 
      min_adjustment_step: 2, 
      policy_arn: "arn:aws:autoscaling:us-west-2:123456789012:scalingPolicy:2b435159-cf77-4e89-8c0e-d63b497baad7:autoScalingGroupName/my-auto-scaling-group:policyName/ScalePercentChange", 
      policy_name: "ScalePercentChange", 
      scaling_adjustment: 25, 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_policies({
  auto_scaling_group_name: "ResourceName",
  policy_names: ["ResourceName"],
  policy_types: ["XmlStringMaxLen64"],
  next_token: "XmlString",
  max_records: 1,
})

Response structure


resp.scaling_policies #=> Array
resp.scaling_policies[0].auto_scaling_group_name #=> String
resp.scaling_policies[0].policy_name #=> String
resp.scaling_policies[0].policy_arn #=> String
resp.scaling_policies[0].policy_type #=> String
resp.scaling_policies[0].adjustment_type #=> String
resp.scaling_policies[0].min_adjustment_step #=> Integer
resp.scaling_policies[0].min_adjustment_magnitude #=> Integer
resp.scaling_policies[0].scaling_adjustment #=> Integer
resp.scaling_policies[0].cooldown #=> Integer
resp.scaling_policies[0].step_adjustments #=> Array
resp.scaling_policies[0].step_adjustments[0].metric_interval_lower_bound #=> Float
resp.scaling_policies[0].step_adjustments[0].metric_interval_upper_bound #=> Float
resp.scaling_policies[0].step_adjustments[0].scaling_adjustment #=> Integer
resp.scaling_policies[0].metric_aggregation_type #=> String
resp.scaling_policies[0].estimated_instance_warmup #=> Integer
resp.scaling_policies[0].alarms #=> Array
resp.scaling_policies[0].alarms[0].alarm_name #=> String
resp.scaling_policies[0].alarms[0].alarm_arn #=> String
resp.scaling_policies[0].target_tracking_configuration.predefined_metric_specification.predefined_metric_type #=> String, one of "ASGAverageCPUUtilization", "ASGAverageNetworkIn", "ASGAverageNetworkOut", "ALBRequestCountPerTarget"
resp.scaling_policies[0].target_tracking_configuration.predefined_metric_specification.resource_label #=> String
resp.scaling_policies[0].target_tracking_configuration.customized_metric_specification.metric_name #=> String
resp.scaling_policies[0].target_tracking_configuration.customized_metric_specification.namespace #=> String
resp.scaling_policies[0].target_tracking_configuration.customized_metric_specification.dimensions #=> Array
resp.scaling_policies[0].target_tracking_configuration.customized_metric_specification.dimensions[0].name #=> String
resp.scaling_policies[0].target_tracking_configuration.customized_metric_specification.dimensions[0].value #=> String
resp.scaling_policies[0].target_tracking_configuration.customized_metric_specification.statistic #=> String, one of "Average", "Minimum", "Maximum", "SampleCount", "Sum"
resp.scaling_policies[0].target_tracking_configuration.customized_metric_specification.unit #=> String
resp.scaling_policies[0].target_tracking_configuration.target_value #=> Float
resp.scaling_policies[0].target_tracking_configuration.disable_scale_in #=> Boolean
resp.scaling_policies[0].enabled #=> Boolean
resp.next_token #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (String) —

    The name of the Auto Scaling group.

  • :policy_names (Array<String>) —

    The names of one or more policies. If you omit this parameter, all policies are described. If a group name is provided, the results are limited to that group. This list is limited to 50 items. If you specify an unknown policy name, it is ignored with no error.

  • :policy_types (Array<String>) —

    One or more policy types. The valid values are SimpleScaling, StepScaling, and TargetTrackingScaling.

  • :next_token (String) —

    The token for the next set of items to return. (You received this token from a previous call.)

  • :max_records (Integer) —

    The maximum number of items to be returned with each call. The default value is 50 and the maximum value is 100.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2627

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

#describe_scaling_activities(params = {}) ⇒ Types::ActivitiesType

Describes one or more scaling activities for the specified Auto Scaling group.

Examples:

Example: To describe the scaling activities for an Auto Scaling group


# This example describes the scaling activities for the specified Auto Scaling group.

resp = client.describe_scaling_activities({
  auto_scaling_group_name: "my-auto-scaling-group", 
})

resp.to_h outputs the following:
{
  activities: [
    {
      activity_id: "f9f2d65b-f1f2-43e7-b46d-d86756459699", 
      auto_scaling_group_name: "my-auto-scaling-group", 
      cause: "At 2013-08-19T20:53:25Z a user request created an AutoScalingGroup changing the desired capacity from 0 to 1.  At 2013-08-19T20:53:29Z an instance was started in response to a difference between desired and actual capacity, increasing the capacity from 0 to 1.", 
      description: "Launching a new EC2 instance: i-4ba0837f", 
      details: "details", 
      end_time: Time.parse("2013-08-19T20:54:02Z"), 
      progress: 100, 
      start_time: Time.parse("2013-08-19T20:53:29.930Z"), 
      status_code: "Successful", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_scaling_activities({
  activity_ids: ["XmlString"],
  auto_scaling_group_name: "ResourceName",
  max_records: 1,
  next_token: "XmlString",
})

Response structure


resp.activities #=> Array
resp.activities[0].activity_id #=> String
resp.activities[0].auto_scaling_group_name #=> String
resp.activities[0].description #=> String
resp.activities[0].cause #=> String
resp.activities[0].start_time #=> Time
resp.activities[0].end_time #=> Time
resp.activities[0].status_code #=> String, one of "PendingSpotBidPlacement", "WaitingForSpotInstanceRequestId", "WaitingForSpotInstanceId", "WaitingForInstanceId", "PreInService", "InProgress", "WaitingForELBConnectionDraining", "MidLifecycleAction", "WaitingForInstanceWarmup", "Successful", "Failed", "Cancelled"
resp.activities[0].status_message #=> String
resp.activities[0].progress #=> Integer
resp.activities[0].details #=> String
resp.next_token #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :activity_ids (Array<String>) —

    The activity IDs of the desired scaling activities. You can specify up to 50 IDs. If you omit this parameter, all activities for the past six weeks are described. If unknown activities are requested, they are ignored with no error. If you specify an Auto Scaling group, the results are limited to that group.

  • :auto_scaling_group_name (String) —

    The name of the Auto Scaling group.

  • :max_records (Integer) —

    The maximum number of items to return with this call. The default value is 100 and the maximum value is 100.

  • :next_token (String) —

    The token for the next set of items to return. (You received this token from a previous call.)

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2712

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

#describe_scaling_process_types(params = {}) ⇒ Types::ProcessesType

Describes the scaling process types for use with ResumeProcesses and SuspendProcesses.

Examples:

Example: To describe the Auto Scaling process types


# This example describes the Auto Scaling process types.

resp = client.describe_scaling_process_types({
})

resp.to_h outputs the following:
{
  processes: [
    {
      process_name: "AZRebalance", 
    }, 
    {
      process_name: "AddToLoadBalancer", 
    }, 
    {
      process_name: "AlarmNotification", 
    }, 
    {
      process_name: "HealthCheck", 
    }, 
    {
      process_name: "Launch", 
    }, 
    {
      process_name: "ReplaceUnhealthy", 
    }, 
    {
      process_name: "ScheduledActions", 
    }, 
    {
      process_name: "Terminate", 
    }, 
  ], 
}

Response structure


resp.processes #=> Array
resp.processes[0].process_name #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2771

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

#describe_scheduled_actions(params = {}) ⇒ Types::ScheduledActionsType

Describes the actions scheduled for your Auto Scaling group that haven't run or that have not reached their end time. To describe the actions that have already run, use DescribeScalingActivities.

Examples:

Example: To describe scheduled actions


# This example describes the scheduled actions for the specified Auto Scaling group.

resp = client.describe_scheduled_actions({
  auto_scaling_group_name: "my-auto-scaling-group", 
})

resp.to_h outputs the following:
{
  scheduled_update_group_actions: [
    {
      auto_scaling_group_name: "my-auto-scaling-group", 
      desired_capacity: 4, 
      max_size: 6, 
      min_size: 2, 
      recurrence: "30 0 1 12 0", 
      scheduled_action_arn: "arn:aws:autoscaling:us-west-2:123456789012:scheduledUpdateGroupAction:8e86b655-b2e6-4410-8f29-b4f094d6871c:autoScalingGroupName/my-auto-scaling-group:scheduledActionName/my-scheduled-action", 
      scheduled_action_name: "my-scheduled-action", 
      start_time: Time.parse("2016-12-01T00:30:00Z"), 
      time: Time.parse("2016-12-01T00:30:00Z"), 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_scheduled_actions({
  auto_scaling_group_name: "ResourceName",
  scheduled_action_names: ["ResourceName"],
  start_time: Time.now,
  end_time: Time.now,
  next_token: "XmlString",
  max_records: 1,
})

Response structure


resp.scheduled_update_group_actions #=> Array
resp.scheduled_update_group_actions[0].auto_scaling_group_name #=> String
resp.scheduled_update_group_actions[0].scheduled_action_name #=> String
resp.scheduled_update_group_actions[0].scheduled_action_arn #=> String
resp.scheduled_update_group_actions[0].time #=> Time
resp.scheduled_update_group_actions[0].start_time #=> Time
resp.scheduled_update_group_actions[0].end_time #=> Time
resp.scheduled_update_group_actions[0].recurrence #=> String
resp.scheduled_update_group_actions[0].min_size #=> Integer
resp.scheduled_update_group_actions[0].max_size #=> Integer
resp.scheduled_update_group_actions[0].desired_capacity #=> Integer
resp.next_token #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (String) —

    The name of the Auto Scaling group.

  • :scheduled_action_names (Array<String>) —

    The names of one or more scheduled actions. You can specify up to 50 actions. If you omit this parameter, all scheduled actions are described. If you specify an unknown scheduled action, it is ignored with no error.

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

    The earliest scheduled start time to return. If scheduled action names are provided, this parameter is ignored.

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

    The latest scheduled start time to return. If scheduled action names are provided, this parameter is ignored.

  • :next_token (String) —

    The token for the next set of items to return. (You received this token from a previous call.)

  • :max_records (Integer) —

    The maximum number of items to return with this call. The default value is 50 and the maximum value is 100.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2866

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

#describe_tags(params = {}) ⇒ Types::TagsType

Describes the specified tags.

You can use filters to limit the results. For example, you can query for the tags for a specific Auto Scaling group. You can specify multiple values for a filter. A tag must match at least one of the specified values for it to be included in the results.

You can also specify multiple filters. The result includes information for a particular tag only if it matches all the filters. If there's no match, no special message is returned.

Examples:

Example: To describe tags


# This example describes the tags for the specified Auto Scaling group.

resp = client.describe_tags({
  filters: [
    {
      name: "auto-scaling-group", 
      values: [
        "my-auto-scaling-group", 
      ], 
    }, 
  ], 
})

resp.to_h outputs the following:
{
  tags: [
    {
      key: "Dept", 
      propagate_at_launch: true, 
      resource_id: "my-auto-scaling-group", 
      resource_type: "auto-scaling-group", 
      value: "Research", 
    }, 
    {
      key: "Role", 
      propagate_at_launch: true, 
      resource_id: "my-auto-scaling-group", 
      resource_type: "auto-scaling-group", 
      value: "WebServer", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.describe_tags({
  filters: [
    {
      name: "XmlString",
      values: ["XmlString"],
    },
  ],
  next_token: "XmlString",
  max_records: 1,
})

Response structure


resp.tags #=> Array
resp.tags[0].resource_id #=> String
resp.tags[0].resource_type #=> String
resp.tags[0].key #=> String
resp.tags[0].value #=> String
resp.tags[0].propagate_at_launch #=> Boolean
resp.next_token #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :filters (Array<Types::Filter>) —

    One or more filters to scope the tags to return. The maximum number of filters per filter type (for example, auto-scaling-group) is 1000.

  • :next_token (String) —

    The token for the next set of items to return. (You received this token from a previous call.)

  • :max_records (Integer) —

    The maximum number of items to return with this call. The default value is 50 and the maximum value is 100.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 2962

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

#describe_termination_policy_types(params = {}) ⇒ Types::DescribeTerminationPolicyTypesAnswer

Describes the termination policies supported by Amazon EC2 Auto Scaling.

For more information, see Controlling Which Auto Scaling Instances Terminate During Scale In in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To describe termination policy types


# This example describes the available termination policy types.

resp = client.describe_termination_policy_types({
})

resp.to_h outputs the following:
{
  termination_policy_types: [
    "ClosestToNextInstanceHour", 
    "Default", 
    "NewestInstance", 
    "OldestInstance", 
    "OldestLaunchConfiguration", 
  ], 
}

Response structure


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

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3010

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

#detach_instances(params = {}) ⇒ Types::DetachInstancesAnswer

Removes one or more instances from the specified Auto Scaling group.

After the instances are detached, you can manage them independent of the Auto Scaling group.

If you do not specify the option to decrement the desired capacity, Amazon EC2 Auto Scaling launches instances to replace the ones that are detached.

If there is a Classic Load Balancer attached to the Auto Scaling group, the instances are deregistered from the load balancer. If there are target groups attached to the Auto Scaling group, the instances are deregistered from the target groups.

For more information, see Detach EC2 Instances from Your Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To detach an instance from an Auto Scaling group


# This example detaches the specified instance from the specified Auto Scaling group.

resp = client.detach_instances({
  auto_scaling_group_name: "my-auto-scaling-group", 
  instance_ids: [
    "i-93633f9b", 
  ], 
  should_decrement_desired_capacity: true, 
})

resp.to_h outputs the following:
{
  activities: [
    {
      activity_id: "5091cb52-547a-47ce-a236-c9ccbc2cb2c9", 
      auto_scaling_group_name: "my-auto-scaling-group", 
      cause: "At 2015-04-12T15:02:16Z instance i-93633f9b was detached in response to a user request, shrinking the capacity from 2 to 1.", 
      description: "Detaching EC2 instance: i-93633f9b", 
      details: "details", 
      progress: 50, 
      start_time: Time.parse("2015-04-12T15:02:16.179Z"), 
      status_code: "InProgress", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.detach_instances({
  instance_ids: ["XmlStringMaxLen19"],
  auto_scaling_group_name: "ResourceName", # required
  should_decrement_desired_capacity: false, # required
})

Response structure


resp.activities #=> Array
resp.activities[0].activity_id #=> String
resp.activities[0].auto_scaling_group_name #=> String
resp.activities[0].description #=> String
resp.activities[0].cause #=> String
resp.activities[0].start_time #=> Time
resp.activities[0].end_time #=> Time
resp.activities[0].status_code #=> String, one of "PendingSpotBidPlacement", "WaitingForSpotInstanceRequestId", "WaitingForSpotInstanceId", "WaitingForInstanceId", "PreInService", "InProgress", "WaitingForELBConnectionDraining", "MidLifecycleAction", "WaitingForInstanceWarmup", "Successful", "Failed", "Cancelled"
resp.activities[0].status_message #=> String
resp.activities[0].progress #=> Integer
resp.activities[0].details #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :instance_ids (Array<String>) —

    The IDs of the instances. You can specify up to 20 instances.

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :should_decrement_desired_capacity (required, Boolean) —

    Indicates whether the Auto Scaling group decrements the desired capacity value by the number of instances detached.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3105

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

#detach_load_balancer_target_groups(params = {}) ⇒ Struct

Detaches one or more target groups from the specified Auto Scaling group.

Examples:

Example: To detach a target group from an Auto Scaling group


# This example detaches the specified target group from the specified Auto Scaling group

resp = client.detach_load_balancer_target_groups({
  auto_scaling_group_name: "my-auto-scaling-group", 
  target_group_arns: [
    "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067", 
  ], 
})

Request syntax with placeholder values


resp = client.detach_load_balancer_target_groups({
  auto_scaling_group_name: "ResourceName", # required
  target_group_arns: ["XmlStringMaxLen511"], # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

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

    The Amazon Resource Names (ARN) of the target groups. You can specify up to 10 target groups.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3145

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

#detach_load_balancers(params = {}) ⇒ Struct

Detaches one or more Classic Load Balancers from the specified Auto Scaling group.

This operation detaches only Classic Load Balancers. If you have Application Load Balancers or Network Load Balancers, use DetachLoadBalancerTargetGroups instead.

When you detach a load balancer, it enters the Removing state while deregistering the instances in the group. When all instances are deregistered, then you can no longer describe the load balancer using DescribeLoadBalancers. The instances remain running.

Examples:

Example: To detach a load balancer from an Auto Scaling group


# This example detaches the specified load balancer from the specified Auto Scaling group.

resp = client.detach_load_balancers({
  auto_scaling_group_name: "my-auto-scaling-group", 
  load_balancer_names: [
    "my-load-balancer", 
  ], 
})

Request syntax with placeholder values


resp = client.detach_load_balancers({
  auto_scaling_group_name: "ResourceName", # required
  load_balancer_names: ["XmlStringMaxLen255"], # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

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

    The names of the load balancers. You can specify up to 10 load balancers.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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

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

#disable_metrics_collection(params = {}) ⇒ Struct

Disables group metrics for the specified Auto Scaling group.

Examples:

Example: To disable metrics collection for an Auto Scaling group


# This example disables collecting data for the GroupDesiredCapacity metric for the specified Auto Scaling group.

resp = client.disable_metrics_collection({
  auto_scaling_group_name: "my-auto-scaling-group", 
  metrics: [
    "GroupDesiredCapacity", 
  ], 
})

Request syntax with placeholder values


resp = client.disable_metrics_collection({
  auto_scaling_group_name: "ResourceName", # required
  metrics: ["XmlStringMaxLen255"],
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :metrics (Array<String>) —

    One or more of the following metrics. If you omit this parameter, all metrics are disabled.

    • GroupMinSize

    • GroupMaxSize

    • GroupDesiredCapacity

    • GroupInServiceInstances

    • GroupPendingInstances

    • GroupStandbyInstances

    • GroupTerminatingInstances

    • GroupTotalInstances

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3249

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

#enable_metrics_collection(params = {}) ⇒ Struct

Enables group metrics for the specified Auto Scaling group. For more information, see Monitoring Your Auto Scaling Groups and Instances in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To enable metrics collection for an Auto Scaling group


# This example enables data collection for the specified Auto Scaling group.

resp = client.enable_metrics_collection({
  auto_scaling_group_name: "my-auto-scaling-group", 
  granularity: "1Minute", 
})

Request syntax with placeholder values


resp = client.enable_metrics_collection({
  auto_scaling_group_name: "ResourceName", # required
  metrics: ["XmlStringMaxLen255"],
  granularity: "XmlStringMaxLen255", # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :metrics (Array<String>) —

    One or more of the following metrics. If you omit this parameter, all metrics are enabled.

    • GroupMinSize

    • GroupMaxSize

    • GroupDesiredCapacity

    • GroupInServiceInstances

    • GroupPendingInstances

    • GroupStandbyInstances

    • GroupTerminatingInstances

    • GroupTotalInstances

  • :granularity (required, String) —

    The granularity to associate with the metrics to collect. The only valid value is 1Minute.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3313

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

#enter_standby(params = {}) ⇒ Types::EnterStandbyAnswer

Moves the specified instances into the standby state.

If you choose to decrement the desired capacity of the Auto Scaling group, the instances can enter standby as long as the desired capacity of the Auto Scaling group after the instances are placed into standby is equal to or greater than the minimum capacity of the group.

If you choose not to decrement the desired capacity of the Auto Scaling group, the Auto Scaling group launches new instances to replace the instances on standby.

For more information, see Temporarily Removing Instances from Your Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To move instances into standby mode


# This example puts the specified instance into standby mode.

resp = client.enter_standby({
  auto_scaling_group_name: "my-auto-scaling-group", 
  instance_ids: [
    "i-93633f9b", 
  ], 
  should_decrement_desired_capacity: true, 
})

resp.to_h outputs the following:
{
  activities: [
    {
      activity_id: "ffa056b4-6ed3-41ba-ae7c-249dfae6eba1", 
      auto_scaling_group_name: "my-auto-scaling-group", 
      cause: "At 2015-04-12T15:10:23Z instance i-93633f9b was moved to standby in response to a user request, shrinking the capacity from 2 to 1.", 
      description: "Moving EC2 instance to Standby: i-93633f9b", 
      details: "details", 
      progress: 50, 
      start_time: Time.parse("2015-04-12T15:10:23.640Z"), 
      status_code: "InProgress", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.enter_standby({
  instance_ids: ["XmlStringMaxLen19"],
  auto_scaling_group_name: "ResourceName", # required
  should_decrement_desired_capacity: false, # required
})

Response structure


resp.activities #=> Array
resp.activities[0].activity_id #=> String
resp.activities[0].auto_scaling_group_name #=> String
resp.activities[0].description #=> String
resp.activities[0].cause #=> String
resp.activities[0].start_time #=> Time
resp.activities[0].end_time #=> Time
resp.activities[0].status_code #=> String, one of "PendingSpotBidPlacement", "WaitingForSpotInstanceRequestId", "WaitingForSpotInstanceId", "WaitingForInstanceId", "PreInService", "InProgress", "WaitingForELBConnectionDraining", "MidLifecycleAction", "WaitingForInstanceWarmup", "Successful", "Failed", "Cancelled"
resp.activities[0].status_message #=> String
resp.activities[0].progress #=> Integer
resp.activities[0].details #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :instance_ids (Array<String>) —

    The IDs of the instances. You can specify up to 20 instances.

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :should_decrement_desired_capacity (required, Boolean) —

    Indicates whether to decrement the desired capacity of the Auto Scaling group by the number of instances moved to Standby mode.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3405

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

#execute_policy(params = {}) ⇒ Struct

Executes the specified policy.

Examples:

Example: To execute an Auto Scaling policy


# This example executes the specified Auto Scaling policy for the specified Auto Scaling group.

resp = client.execute_policy({
  auto_scaling_group_name: "my-auto-scaling-group", 
  honor_cooldown: true, 
  policy_name: "ScaleIn", 
})

Request syntax with placeholder values


resp = client.execute_policy({
  auto_scaling_group_name: "ResourceName",
  policy_name: "ResourceName", # required
  honor_cooldown: false,
  metric_value: 1.0,
  breach_threshold: 1.0,
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (String) —

    The name of the Auto Scaling group.

  • :policy_name (required, String) —

    The name or ARN of the policy.

  • :honor_cooldown (Boolean) —

    Indicates whether Amazon EC2 Auto Scaling waits for the cooldown period to complete before executing the policy.

    This parameter is not supported if the policy type is StepScaling or TargetTrackingScaling.

    For more information, see Scaling Cooldowns in the Amazon EC2 Auto Scaling User Guide.

  • :metric_value (Float) —

    The metric value to compare to BreachThreshold. This enables you to execute a policy of type StepScaling and determine which step adjustment to use. For example, if the breach threshold is 50 and you want to use a step adjustment with a lower bound of 0 and an upper bound of 10, you can set the metric value to 59.

    If you specify a metric value that doesn't correspond to a step adjustment for the policy, the call returns an error.

    Conditional: This parameter is required if the policy type is StepScaling and not supported otherwise.

  • :breach_threshold (Float) —

    The breach threshold for the alarm.

    Conditional: This parameter is required if the policy type is StepScaling and not supported otherwise.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3478

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

#exit_standby(params = {}) ⇒ Types::ExitStandbyAnswer

Moves the specified instances out of the standby state.

After you put the instances back in service, the desired capacity is incremented.

For more information, see Temporarily Removing Instances from Your Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To move instances out of standby mode


# This example moves the specified instance out of standby mode.

resp = client.exit_standby({
  auto_scaling_group_name: "my-auto-scaling-group", 
  instance_ids: [
    "i-93633f9b", 
  ], 
})

resp.to_h outputs the following:
{
  activities: [
    {
      activity_id: "142928e1-a2dc-453a-9b24-b85ad6735928", 
      auto_scaling_group_name: "my-auto-scaling-group", 
      cause: "At 2015-04-12T15:14:29Z instance i-93633f9b was moved out of standby in response to a user request, increasing the capacity from 1 to 2.", 
      description: "Moving EC2 instance out of Standby: i-93633f9b", 
      details: "details", 
      progress: 30, 
      start_time: Time.parse("2015-04-12T15:14:29.886Z"), 
      status_code: "PreInService", 
    }, 
  ], 
}

Request syntax with placeholder values


resp = client.exit_standby({
  instance_ids: ["XmlStringMaxLen19"],
  auto_scaling_group_name: "ResourceName", # required
})

Response structure


resp.activities #=> Array
resp.activities[0].activity_id #=> String
resp.activities[0].auto_scaling_group_name #=> String
resp.activities[0].description #=> String
resp.activities[0].cause #=> String
resp.activities[0].start_time #=> Time
resp.activities[0].end_time #=> Time
resp.activities[0].status_code #=> String, one of "PendingSpotBidPlacement", "WaitingForSpotInstanceRequestId", "WaitingForSpotInstanceId", "WaitingForInstanceId", "PreInService", "InProgress", "WaitingForELBConnectionDraining", "MidLifecycleAction", "WaitingForInstanceWarmup", "Successful", "Failed", "Cancelled"
resp.activities[0].status_message #=> String
resp.activities[0].progress #=> Integer
resp.activities[0].details #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :instance_ids (Array<String>) —

    The IDs of the instances. You can specify up to 20 instances.

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3558

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

#put_lifecycle_hook(params = {}) ⇒ Struct

Creates or updates a lifecycle hook for the specified Auto Scaling group.

A lifecycle hook tells Amazon EC2 Auto Scaling to perform an action on an instance when the instance launches (before it is put into service) or as the instance terminates (before it is fully terminated).

This step is a part of the procedure for adding a lifecycle hook to an Auto Scaling group:

  1. (Optional) Create a Lambda function and a rule that allows CloudWatch Events to invoke your Lambda function when Amazon EC2 Auto Scaling launches or terminates instances.

  2. (Optional) Create a notification target and an IAM role. The target can be either an Amazon SQS queue or an Amazon SNS topic. The role allows Amazon EC2 Auto Scaling to publish lifecycle notifications to the target.

  3. Create the lifecycle hook. Specify whether the hook is used when the instances launch or terminate.

  4. If you need more time, record the lifecycle action heartbeat to keep the instance in a pending state using RecordLifecycleActionHeartbeat.

  5. If you finish before the timeout period ends, complete the lifecycle action using CompleteLifecycleAction.

For more information, see Amazon EC2 Auto Scaling Lifecycle Hooks in the Amazon EC2 Auto Scaling User Guide.

If you exceed your maximum limit of lifecycle hooks, which by default is 50 per Auto Scaling group, the call fails.

You can view the lifecycle hooks for an Auto Scaling group using DescribeLifecycleHooks. If you are no longer using a lifecycle hook, you can delete it using DeleteLifecycleHook.

Examples:

Example: To create a lifecycle hook


# This example creates a lifecycle hook.

resp = client.put_lifecycle_hook({
  auto_scaling_group_name: "my-auto-scaling-group", 
  lifecycle_hook_name: "my-lifecycle-hook", 
  lifecycle_transition: "autoscaling:EC2_INSTANCE_LAUNCHING", 
  notification_target_arn: "arn:aws:sns:us-west-2:123456789012:my-sns-topic --role-arn", 
  role_arn: "arn:aws:iam::123456789012:role/my-auto-scaling-role", 
})

Request syntax with placeholder values


resp = client.put_lifecycle_hook({
  lifecycle_hook_name: "AsciiStringMaxLen255", # required
  auto_scaling_group_name: "ResourceName", # required
  lifecycle_transition: "LifecycleTransition",
  role_arn: "ResourceName",
  notification_target_arn: "NotificationTargetResourceName",
  notification_metadata: "XmlStringMaxLen1023",
  heartbeat_timeout: 1,
  default_result: "LifecycleActionResult",
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :lifecycle_hook_name (required, String) —

    The name of the lifecycle hook.

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :lifecycle_transition (String) —

    The instance state to which you want to attach the lifecycle hook. The valid values are:

    • autoscaling:EC2_INSTANCE_LAUNCHING

    • autoscaling:EC2_INSTANCE_TERMINATING

    Conditional: This parameter is required for new lifecycle hooks, but optional when updating existing hooks.

  • :role_arn (String) —

    The ARN of the IAM role that allows the Auto Scaling group to publish to the specified notification target, for example, an Amazon SNS topic or an Amazon SQS queue.

    Conditional: This parameter is required for new lifecycle hooks, but optional when updating existing hooks.

  • :notification_target_arn (String) —

    The ARN of the notification target that Amazon EC2 Auto Scaling uses to notify you when an instance is in the transition state for the lifecycle hook. This target can be either an SQS queue or an SNS topic.

    If you specify an empty string, this overrides the current ARN.

    This operation uses the JSON format when sending notifications to an Amazon SQS queue, and an email key-value pair format when sending notifications to an Amazon SNS topic.

    When you specify a notification target, Amazon EC2 Auto Scaling sends it a test message. Test messages contain the following additional key-value pair: "Event": "autoscaling:TEST_NOTIFICATION".

  • :notification_metadata (String) —

    Additional information that you want to include any time Amazon EC2 Auto Scaling sends a message to the notification target.

  • :heartbeat_timeout (Integer) —

    The maximum time, in seconds, that can elapse before the lifecycle hook times out. The range is from 30 to 7200 seconds. The default value is 3600 seconds (1 hour).

    If the lifecycle hook times out, Amazon EC2 Auto Scaling performs the action that you specified in the DefaultResult parameter. You can prevent the lifecycle hook from timing out by calling RecordLifecycleActionHeartbeat.

  • :default_result (String) —

    Defines the action the Auto Scaling group should take when the lifecycle hook timeout elapses or if an unexpected failure occurs. This parameter can be either CONTINUE or ABANDON. The default value is ABANDON.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3699

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

#put_notification_configuration(params = {}) ⇒ Struct

Configures an Auto Scaling group to send notifications when specified events take place. Subscribers to the specified topic can have messages delivered to an endpoint such as a web server or an email address.

This configuration overwrites any existing configuration.

For more information, see Getting Amazon SNS Notifications When Your Auto Scaling Group Scales in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To add an Auto Scaling notification


# This example adds the specified notification to the specified Auto Scaling group.

resp = client.put_notification_configuration({
  auto_scaling_group_name: "my-auto-scaling-group", 
  notification_types: [
    "autoscaling:TEST_NOTIFICATION", 
  ], 
  topic_arn: "arn:aws:sns:us-west-2:123456789012:my-sns-topic", 
})

Request syntax with placeholder values


resp = client.put_notification_configuration({
  auto_scaling_group_name: "ResourceName", # required
  topic_arn: "ResourceName", # required
  notification_types: ["XmlStringMaxLen255"], # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :topic_arn (required, String) —

    The Amazon Resource Name (ARN) of the Amazon Simple Notification Service (Amazon SNS) topic.

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

    The type of event that causes the notification to be sent. For more information about notification types supported by Amazon EC2 Auto Scaling, see DescribeAutoScalingNotificationTypes.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3758

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

#put_scaling_policy(params = {}) ⇒ Types::PolicyARNType

Creates or updates a scaling policy for an Auto Scaling group.

For more information about using scaling policies to scale your Auto Scaling group automatically, see Dynamic Scaling in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To add a scaling policy to an Auto Scaling group


# This example adds the specified policy to the specified Auto Scaling group.

resp = client.put_scaling_policy({
  adjustment_type: "ChangeInCapacity", 
  auto_scaling_group_name: "my-auto-scaling-group", 
  policy_name: "ScaleIn", 
  scaling_adjustment: -1, 
})

resp.to_h outputs the following:
{
  policy_arn: "arn:aws:autoscaling:us-west-2:123456789012:scalingPolicy:2233f3d7-6290-403b-b632-93c553560106:autoScalingGroupName/my-auto-scaling-group:policyName/ScaleIn", 
}

Request syntax with placeholder values


resp = client.put_scaling_policy({
  auto_scaling_group_name: "ResourceName", # required
  policy_name: "XmlStringMaxLen255", # required
  policy_type: "XmlStringMaxLen64",
  adjustment_type: "XmlStringMaxLen255",
  min_adjustment_step: 1,
  min_adjustment_magnitude: 1,
  scaling_adjustment: 1,
  cooldown: 1,
  metric_aggregation_type: "XmlStringMaxLen32",
  step_adjustments: [
    {
      metric_interval_lower_bound: 1.0,
      metric_interval_upper_bound: 1.0,
      scaling_adjustment: 1, # required
    },
  ],
  estimated_instance_warmup: 1,
  target_tracking_configuration: {
    predefined_metric_specification: {
      predefined_metric_type: "ASGAverageCPUUtilization", # required, accepts ASGAverageCPUUtilization, ASGAverageNetworkIn, ASGAverageNetworkOut, ALBRequestCountPerTarget
      resource_label: "XmlStringMaxLen1023",
    },
    customized_metric_specification: {
      metric_name: "MetricName", # required
      namespace: "MetricNamespace", # required
      dimensions: [
        {
          name: "MetricDimensionName", # required
          value: "MetricDimensionValue", # required
        },
      ],
      statistic: "Average", # required, accepts Average, Minimum, Maximum, SampleCount, Sum
      unit: "MetricUnit",
    },
    target_value: 1.0, # required
    disable_scale_in: false,
  },
  enabled: false,
})

Response structure


resp.policy_arn #=> String
resp.alarms #=> Array
resp.alarms[0].alarm_name #=> String
resp.alarms[0].alarm_arn #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :policy_name (required, String) —

    The name of the policy.

  • :policy_type (String) —

    The policy type. The valid values are SimpleScaling, StepScaling, and TargetTrackingScaling. If the policy type is null, the value is treated as SimpleScaling.

  • :adjustment_type (String) —

    Specifies whether the ScalingAdjustment parameter is an absolute number or a percentage of the current capacity. The valid values are ChangeInCapacity, ExactCapacity, and PercentChangeInCapacity.

    Valid only if the policy type is StepScaling or SimpleScaling. For more information, see Scaling Adjustment Types in the Amazon EC2 Auto Scaling User Guide.

  • :min_adjustment_step (Integer) —

    Available for backward compatibility. Use MinAdjustmentMagnitude instead.

  • :min_adjustment_magnitude (Integer) —

    The minimum number of instances to scale. If the value of AdjustmentType is PercentChangeInCapacity, the scaling policy changes the DesiredCapacity of the Auto Scaling group by at least this many instances. Otherwise, the error is ValidationError.

    This property replaces the MinAdjustmentStep property. For example, suppose that you create a step scaling policy to scale out an Auto Scaling group by 25 percent and you specify a MinAdjustmentMagnitude of 2. If the group has 4 instances and the scaling policy is performed, 25 percent of 4 is 1. However, because you specified a MinAdjustmentMagnitude of 2, Amazon EC2 Auto Scaling scales out the group by 2 instances.

    Valid only if the policy type is SimpleScaling or StepScaling.

  • :scaling_adjustment (Integer) —

    The amount by which a simple scaling policy scales the Auto Scaling group in response to an alarm breach. The adjustment is based on the value that you specified in the AdjustmentType parameter (either an absolute number or a percentage). A positive value adds to the current capacity and a negative value subtracts from the current capacity. For exact capacity, you must specify a positive value.

    Conditional: If you specify SimpleScaling for the policy type, you must specify this parameter. (Not used with any other policy type.)

  • :cooldown (Integer) —

    The amount of time, in seconds, after a scaling activity completes before any further dynamic scaling activities can start. If this parameter is not specified, the default cooldown period for the group applies.

    Valid only if the policy type is SimpleScaling. For more information, see Scaling Cooldowns in the Amazon EC2 Auto Scaling User Guide.

  • :metric_aggregation_type (String) —

    The aggregation type for the CloudWatch metrics. The valid values are Minimum, Maximum, and Average. If the aggregation type is null, the value is treated as Average.

    Valid only if the policy type is StepScaling.

  • :step_adjustments (Array<Types::StepAdjustment>) —

    A set of adjustments that enable you to scale based on the size of the alarm breach.

    Conditional: If you specify StepScaling for the policy type, you must specify this parameter. (Not used with any other policy type.)

  • :estimated_instance_warmup (Integer) —

    The estimated time, in seconds, until a newly launched instance can contribute to the CloudWatch metrics. The default is to use the value specified for the default cooldown period for the group.

    Valid only if the policy type is StepScaling or TargetTrackingScaling.

  • :target_tracking_configuration (Types::TargetTrackingConfiguration) —

    A target tracking scaling policy. Includes support for predefined or customized metrics.

    For more information, see TargetTrackingConfiguration in the Amazon EC2 Auto Scaling API Reference.

    Conditional: If you specify TargetTrackingScaling for the policy type, you must specify this parameter. (Not used with any other policy type.)

  • :enabled (Boolean) —

    Indicates whether the scaling policy is enabled or disabled. The default is enabled. For more information, see Disabling a Scaling Policy for an Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 3965

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

#put_scheduled_update_group_action(params = {}) ⇒ Struct

Creates or updates a scheduled scaling action for an Auto Scaling group. If you leave a parameter unspecified when updating a scheduled scaling action, the corresponding value remains unchanged.

For more information, see Scheduled Scaling in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To add a scheduled action to an Auto Scaling group


# This example adds the specified scheduled action to the specified Auto Scaling group.

resp = client.put_scheduled_update_group_action({
  auto_scaling_group_name: "my-auto-scaling-group", 
  desired_capacity: 4, 
  end_time: Time.parse("2014-05-12T08:00:00Z"), 
  max_size: 6, 
  min_size: 2, 
  scheduled_action_name: "my-scheduled-action", 
  start_time: Time.parse("2014-05-12T08:00:00Z"), 
})

Request syntax with placeholder values


resp = client.put_scheduled_update_group_action({
  auto_scaling_group_name: "ResourceName", # required
  scheduled_action_name: "XmlStringMaxLen255", # required
  time: Time.now,
  start_time: Time.now,
  end_time: Time.now,
  recurrence: "XmlStringMaxLen255",
  min_size: 1,
  max_size: 1,
  desired_capacity: 1,
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :scheduled_action_name (required, String) —

    The name of this scaling action.

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

    This parameter is no longer used.

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

    The date and time for this action to start, in YYYY-MM-DDThh:mm:ssZ format in UTC/GMT only and in quotes (for example, "2019-06-01T00:00:00Z").

    If you specify Recurrence and StartTime, Amazon EC2 Auto Scaling performs the action at this time, and then performs the action based on the specified recurrence.

    If you try to schedule your action in the past, Amazon EC2 Auto Scaling returns an error message.

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

    The date and time for the recurring schedule to end. Amazon EC2 Auto Scaling does not perform the action after this time.

  • :recurrence (String) —

    The recurring schedule for this action, in Unix cron syntax format. This format consists of five fields separated by white spaces: [Minute] [Hour] [Day_of_Month] [Month_of_Year] [Day_of_Week]. The value must be in quotes (for example, "30 0 1 1,6,12 *"). For more information about this format, see Crontab.

    When StartTime and EndTime are specified with Recurrence, they form the boundaries of when the recurring action starts and stops.

  • :min_size (Integer) —

    The minimum number of instances in the Auto Scaling group.

  • :max_size (Integer) —

    The maximum number of instances in the Auto Scaling group.

  • :desired_capacity (Integer) —

    The number of EC2 instances that should be running in the Auto Scaling group.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 4065

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

#record_lifecycle_action_heartbeat(params = {}) ⇒ Struct

Records a heartbeat for the lifecycle action associated with the specified token or instance. This extends the timeout by the length of time defined using PutLifecycleHook.

This step is a part of the procedure for adding a lifecycle hook to an Auto Scaling group:

  1. (Optional) Create a Lambda function and a rule that allows CloudWatch Events to invoke your Lambda function when Amazon EC2 Auto Scaling launches or terminates instances.

  2. (Optional) Create a notification target and an IAM role. The target can be either an Amazon SQS queue or an Amazon SNS topic. The role allows Amazon EC2 Auto Scaling to publish lifecycle notifications to the target.

  3. Create the lifecycle hook. Specify whether the hook is used when the instances launch or terminate.

  4. If you need more time, record the lifecycle action heartbeat to keep the instance in a pending state.

  5. If you finish before the timeout period ends, complete the lifecycle action.

For more information, see Auto Scaling Lifecycle in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To record a lifecycle action heartbeat


# This example records a lifecycle action heartbeat to keep the instance in a pending state.

resp = client.record_lifecycle_action_heartbeat({
  auto_scaling_group_name: "my-auto-scaling-group", 
  lifecycle_action_token: "bcd2f1b8-9a78-44d3-8a7a-4dd07d7cf635", 
  lifecycle_hook_name: "my-lifecycle-hook", 
})

Request syntax with placeholder values


resp = client.record_lifecycle_action_heartbeat({
  lifecycle_hook_name: "AsciiStringMaxLen255", # required
  auto_scaling_group_name: "ResourceName", # required
  lifecycle_action_token: "LifecycleActionToken",
  instance_id: "XmlStringMaxLen19",
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :lifecycle_hook_name (required, String) —

    The name of the lifecycle hook.

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :lifecycle_action_token (String) —

    A token that uniquely identifies a specific lifecycle action associated with an instance. Amazon EC2 Auto Scaling sends this token to the notification target that you specified when you created the lifecycle hook.

  • :instance_id (String) —

    The ID of the instance.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 4143

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

#resume_processes(params = {}) ⇒ Struct

Resumes the specified suspended automatic scaling processes, or all suspended process, for the specified Auto Scaling group.

For more information, see Suspending and Resuming Scaling Processes in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To resume Auto Scaling processes


# This example resumes the specified suspended scaling process for the specified Auto Scaling group.

resp = client.resume_processes({
  auto_scaling_group_name: "my-auto-scaling-group", 
  scaling_processes: [
    "AlarmNotification", 
  ], 
})

Request syntax with placeholder values


resp = client.resume_processes({
  auto_scaling_group_name: "ResourceName", # required
  scaling_processes: ["XmlStringMaxLen255"],
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :scaling_processes (Array<String>) —

    One or more of the following processes. If you omit this parameter, all processes are specified.

    • Launch

    • Terminate

    • HealthCheck

    • ReplaceUnhealthy

    • AZRebalance

    • AlarmNotification

    • ScheduledActions

    • AddToLoadBalancer

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 4206

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

#set_desired_capacity(params = {}) ⇒ Struct

Sets the size of the specified Auto Scaling group.

For more information about desired capacity, see What Is Amazon EC2 Auto Scaling? in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To set the desired capacity for an Auto Scaling group


# This example sets the desired capacity for the specified Auto Scaling group.

resp = client.set_desired_capacity({
  auto_scaling_group_name: "my-auto-scaling-group", 
  desired_capacity: 2, 
  honor_cooldown: true, 
})

Request syntax with placeholder values


resp = client.set_desired_capacity({
  auto_scaling_group_name: "ResourceName", # required
  desired_capacity: 1, # required
  honor_cooldown: false,
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :desired_capacity (required, Integer) —

    The number of EC2 instances that should be running in the Auto Scaling group.

  • :honor_cooldown (Boolean) —

    Indicates whether Amazon EC2 Auto Scaling waits for the cooldown period to complete before initiating a scaling activity to set your Auto Scaling group to its new capacity. By default, Amazon EC2 Auto Scaling does not honor the cooldown period during manual scaling activities.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 4259

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

#set_instance_health(params = {}) ⇒ Struct

Sets the health status of the specified instance.

For more information, see Health Checks for Auto Scaling Instances in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To set the health status of an instance


# This example sets the health status of the specified instance to Unhealthy.

resp = client.set_instance_health({
  health_status: "Unhealthy", 
  instance_id: "i-93633f9b", 
})

Request syntax with placeholder values


resp = client.set_instance_health({
  instance_id: "XmlStringMaxLen19", # required
  health_status: "XmlStringMaxLen32", # required
  should_respect_grace_period: false,
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :instance_id (required, String) —

    The ID of the instance.

  • :health_status (required, String) —

    The health status of the instance. Set to Healthy to have the instance remain in service. Set to Unhealthy to have the instance be out of service. Amazon EC2 Auto Scaling terminates and replaces the unhealthy instance.

  • :should_respect_grace_period (Boolean) —

    If the Auto Scaling group of the specified instance has a HealthCheckGracePeriod specified for the group, by default, this call respects the grace period. Set this to False, to have the call not respect the grace period associated with the group.

    For more information about the health check grace period, see CreateAutoScalingGroup.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 4315

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

#set_instance_protection(params = {}) ⇒ Struct

Updates the instance protection settings of the specified instances.

For more information about preventing instances that are part of an Auto Scaling group from terminating on scale in, see Instance Protection in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To enable instance protection for an instance


# This example enables instance protection for the specified instance.

resp = client.set_instance_protection({
  auto_scaling_group_name: "my-auto-scaling-group", 
  instance_ids: [
    "i-93633f9b", 
  ], 
  protected_from_scale_in: true, 
})

Example: To disable instance protection for an instance


# This example disables instance protection for the specified instance.

resp = client.set_instance_protection({
  auto_scaling_group_name: "my-auto-scaling-group", 
  instance_ids: [
    "i-93633f9b", 
  ], 
  protected_from_scale_in: false, 
})

Request syntax with placeholder values


resp = client.set_instance_protection({
  instance_ids: ["XmlStringMaxLen19"], # required
  auto_scaling_group_name: "ResourceName", # required
  protected_from_scale_in: false, # required
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

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

    One or more instance IDs.

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :protected_from_scale_in (required, Boolean) —

    Indicates whether the instance is protected from termination by Amazon EC2 Auto Scaling when scaling in.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 4379

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

#suspend_processes(params = {}) ⇒ Struct

Suspends the specified automatic scaling processes, or all processes, for the specified Auto Scaling group.

If you suspend either the Launch or Terminate process types, it can prevent other process types from functioning properly.

To resume processes that have been suspended, use ResumeProcesses.

For more information, see Suspending and Resuming Scaling Processes in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To suspend Auto Scaling processes


# This example suspends the specified scaling process for the specified Auto Scaling group.

resp = client.suspend_processes({
  auto_scaling_group_name: "my-auto-scaling-group", 
  scaling_processes: [
    "AlarmNotification", 
  ], 
})

Request syntax with placeholder values


resp = client.suspend_processes({
  auto_scaling_group_name: "ResourceName", # required
  scaling_processes: ["XmlStringMaxLen255"],
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :scaling_processes (Array<String>) —

    One or more of the following processes. If you omit this parameter, all processes are specified.

    • Launch

    • Terminate

    • HealthCheck

    • ReplaceUnhealthy

    • AZRebalance

    • AlarmNotification

    • ScheduledActions

    • AddToLoadBalancer

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 4447

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

#terminate_instance_in_auto_scaling_group(params = {}) ⇒ Types::ActivityType

Terminates the specified instance and optionally adjusts the desired group size. This call simply makes a termination request. The instance is not terminated immediately. When an instance is terminated, the instance status changes to terminated. You can't connect to or start an instance after you've terminated it.

If you do not specify the option to decrement the desired capacity, Amazon EC2 Auto Scaling launches instances to replace the ones that are terminated.

By default, Amazon EC2 Auto Scaling balances instances across all Availability Zones. If you decrement the desired capacity, your Auto Scaling group can become unbalanced between Availability Zones. Amazon EC2 Auto Scaling tries to rebalance the group, and rebalancing might terminate instances in other zones. For more information, see Rebalancing Activities in the Amazon EC2 Auto Scaling User Guide.

Examples:

Example: To terminate an instance in an Auto Scaling group


# This example terminates the specified instance from the specified Auto Scaling group without updating the size of the
# group. Auto Scaling launches a replacement instance after the specified instance terminates.

resp = client.terminate_instance_in_auto_scaling_group({
  instance_id: "i-93633f9b", 
  should_decrement_desired_capacity: false, 
})

Request syntax with placeholder values


resp = client.terminate_instance_in_auto_scaling_group({
  instance_id: "XmlStringMaxLen19", # required
  should_decrement_desired_capacity: false, # required
})

Response structure


resp.activity.activity_id #=> String
resp.activity.auto_scaling_group_name #=> String
resp.activity.description #=> String
resp.activity.cause #=> String
resp.activity.start_time #=> Time
resp.activity.end_time #=> Time
resp.activity.status_code #=> String, one of "PendingSpotBidPlacement", "WaitingForSpotInstanceRequestId", "WaitingForSpotInstanceId", "WaitingForInstanceId", "PreInService", "InProgress", "WaitingForELBConnectionDraining", "MidLifecycleAction", "WaitingForInstanceWarmup", "Successful", "Failed", "Cancelled"
resp.activity.status_message #=> String
resp.activity.progress #=> Integer
resp.activity.details #=> String

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :instance_id (required, String) —

    The ID of the instance.

  • :should_decrement_desired_capacity (required, Boolean) —

    Indicates whether terminating the instance also decrements the size of the Auto Scaling group.

Returns:

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 4520

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

#update_auto_scaling_group(params = {}) ⇒ Struct

Updates the configuration for the specified Auto Scaling group.

To update an Auto Scaling group, specify the name of the group and the parameter that you want to change. Any parameters that you don't specify are not changed by this update request. The new settings take effect on any scaling activities after this call returns.

If you associate a new launch configuration or template with an Auto Scaling group, all new instances will get the updated configuration. Existing instances continue to run with the configuration that they were originally launched with. When you update a group to specify a mixed instances policy instead of a launch configuration or template, existing instances may be replaced to match the new purchasing options that you specified in the policy. For example, if the group currently has 100% On-Demand capacity and the policy specifies 50% Spot capacity, this means that half of your instances will be gradually terminated and relaunched as Spot Instances. When replacing instances, Amazon EC2 Auto Scaling launches new instances before terminating the old ones, so that updating your group does not compromise the performance or availability of your application.

Note the following about changing DesiredCapacity, MaxSize, or MinSize:

  • If a scale-in event occurs as a result of a new DesiredCapacity value that is lower than the current size of the group, the Auto Scaling group uses its termination policy to determine which instances to terminate.

  • If you specify a new value for MinSize without specifying a value for DesiredCapacity, and the new MinSize is larger than the current size of the group, this sets the group's DesiredCapacity to the new MinSize value.

  • If you specify a new value for MaxSize without specifying a value for DesiredCapacity, and the new MaxSize is smaller than the current size of the group, this sets the group's DesiredCapacity to the new MaxSize value.

To see which parameters have been set, use DescribeAutoScalingGroups. You can also view the scaling policies for an Auto Scaling group using DescribePolicies. If the group has scaling policies, you can update them using PutScalingPolicy.

Examples:

Example: To update the launch configuration


# This example updates the launch configuration of the specified Auto Scaling group.

resp = client.update_auto_scaling_group({
  auto_scaling_group_name: "my-auto-scaling-group", 
  launch_configuration_name: "new-launch-config", 
})

Example: To update the minimum and maximum size


# This example updates the minimum size and maximum size of the specified Auto Scaling group.

resp = client.update_auto_scaling_group({
  auto_scaling_group_name: "my-auto-scaling-group", 
  max_size: 3, 
  min_size: 1, 
})

Example: To enable instance protection


# This example enables instance protection for the specified Auto Scaling group.

resp = client.update_auto_scaling_group({
  auto_scaling_group_name: "my-auto-scaling-group", 
  new_instances_protected_from_scale_in: true, 
})

Request syntax with placeholder values


resp = client.update_auto_scaling_group({
  auto_scaling_group_name: "ResourceName", # required
  launch_configuration_name: "ResourceName",
  launch_template: {
    launch_template_id: "XmlStringMaxLen255",
    launch_template_name: "LaunchTemplateName",
    version: "XmlStringMaxLen255",
  },
  mixed_instances_policy: {
    launch_template: {
      launch_template_specification: {
        launch_template_id: "XmlStringMaxLen255",
        launch_template_name: "LaunchTemplateName",
        version: "XmlStringMaxLen255",
      },
      overrides: [
        {
          instance_type: "XmlStringMaxLen255",
          weighted_capacity: "XmlStringMaxLen32",
        },
      ],
    },
    instances_distribution: {
      on_demand_allocation_strategy: "XmlString",
      on_demand_base_capacity: 1,
      on_demand_percentage_above_base_capacity: 1,
      spot_allocation_strategy: "XmlString",
      spot_instance_pools: 1,
      spot_max_price: "MixedInstanceSpotPrice",
    },
  },
  min_size: 1,
  max_size: 1,
  desired_capacity: 1,
  default_cooldown: 1,
  availability_zones: ["XmlStringMaxLen255"],
  health_check_type: "XmlStringMaxLen32",
  health_check_grace_period: 1,
  placement_group: "XmlStringMaxLen255",
  vpc_zone_identifier: "XmlStringMaxLen2047",
  termination_policies: ["XmlStringMaxLen1600"],
  new_instances_protected_from_scale_in: false,
  service_linked_role_arn: "ResourceName",
  max_instance_lifetime: 1,
})

Parameters:

  • params (Hash) (defaults to: {}) —

    ({})

Options Hash (params):

  • :auto_scaling_group_name (required, String) —

    The name of the Auto Scaling group.

  • :launch_configuration_name (String) —

    The name of the launch configuration. If you specify LaunchConfigurationName in your update request, you can't specify LaunchTemplate or MixedInstancesPolicy.

  • :launch_template (Types::LaunchTemplateSpecification) —

    The launch template and version to use to specify the updates. If you specify LaunchTemplate in your update request, you can't specify LaunchConfigurationName or MixedInstancesPolicy.

    For more information, see LaunchTemplateSpecification in the Amazon EC2 Auto Scaling API Reference.

  • :mixed_instances_policy (Types::MixedInstancesPolicy) —

    An embedded object that specifies a mixed instances policy.

    In your call to UpdateAutoScalingGroup, you can make changes to the policy that is specified. All optional parameters are left unchanged if not specified.

    For more information, see MixedInstancesPolicy in the Amazon EC2 Auto Scaling API Reference and Auto Scaling Groups with Multiple Instance Types and Purchase Options in the Amazon EC2 Auto Scaling User Guide.

  • :min_size (Integer) —

    The minimum size of the Auto Scaling group.

  • :max_size (Integer) —

    The maximum size of the Auto Scaling group.

  • :desired_capacity (Integer) —

    The number of EC2 instances that should be running in the Auto Scaling group. This number must be greater than or equal to the minimum size of the group and less than or equal to the maximum size of the group.

  • :default_cooldown (Integer) —

    The amount of time, in seconds, after a scaling activity completes before another scaling activity can start. The default value is 300. This cooldown period is not used when a scaling-specific cooldown is specified.

    Cooldown periods are not supported for target tracking scaling policies, step scaling policies, or scheduled scaling. For more information, see Scaling Cooldowns in the Amazon EC2 Auto Scaling User Guide.

  • :availability_zones (Array<String>) —

    One or more Availability Zones for the group.

  • :health_check_type (String) —

    The service to use for the health checks. The valid values are EC2 and ELB. If you configure an Auto Scaling group to use ELB health checks, it considers the instance unhealthy if it fails either the EC2 status checks or the load balancer health checks.

  • :health_check_grace_period (Integer) —

    The amount of time, in seconds, that Amazon EC2 Auto Scaling waits before checking the health status of an EC2 instance that has come into service. The default value is 0.

    For more information, see Health Check Grace Period in the Amazon EC2 Auto Scaling User Guide.

    Conditional: This parameter is required if you are adding an ELB health check.

  • :placement_group (String) —

    The name of the placement group into which to launch your instances, if any. A placement group is a logical grouping of instances within a single Availability Zone. You cannot specify multiple Availability Zones and a placement group. For more information, see Placement Groups in the Amazon EC2 User Guide for Linux Instances.

  • :vpc_zone_identifier (String) —

    A comma-separated list of subnet IDs for virtual private cloud (VPC).

    If you specify VPCZoneIdentifier with AvailabilityZones, the subnets that you specify for this parameter must reside in those Availability Zones.

  • :termination_policies (Array<String>) —

    A standalone termination policy or a list of termination policies used to select the instance to terminate. The policies are executed in the order that they are listed.

    For more information, see Controlling Which Instances Auto Scaling Terminates During Scale In in the Amazon EC2 Auto Scaling User Guide.

  • :new_instances_protected_from_scale_in (Boolean) —

    Indicates whether newly launched instances are protected from termination by Amazon EC2 Auto Scaling when scaling in.

    For more information about preventing instances from terminating on scale in, see Instance Protection in the Amazon EC2 Auto Scaling User Guide.

  • :service_linked_role_arn (String) —

    The Amazon Resource Name (ARN) of the service-linked role that the Auto Scaling group uses to call other AWS services on your behalf. For more information, see Service-Linked Roles in the Amazon EC2 Auto Scaling User Guide.

  • :max_instance_lifetime (Integer) —

    The maximum amount of time, in seconds, that an instance can be in service.

    For more information, see Replacing Auto Scaling Instances Based on Maximum Instance Lifetime in the Amazon EC2 Auto Scaling User Guide.

    Valid Range: Minimum value of 604800.

Returns:

  • (Struct) —

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 4806

def update_auto_scaling_group(params = {}, options = {})
  req = build_request(:update_auto_scaling_group, 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.wait_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
group_exists #describe_auto_scaling_groups 5 10
group_in_service #describe_auto_scaling_groups 15 40
group_not_exists #describe_auto_scaling_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 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/client.rb', line 4918

def wait_until(waiter_name, params = {}, options = {})
  w = waiter(waiter_name, options)
  yield(w.waiter) if block_given? # deprecated
  w.wait(params)
end