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[ aws . autoscaling ]

describe-lifecycle-hooks

Description

Describes the lifecycle hooks for the specified Auto Scaling group.

See also: AWS API Documentation

See 'aws help' for descriptions of global parameters.

Synopsis

  describe-lifecycle-hooks
--auto-scaling-group-name <value>
[--lifecycle-hook-names <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]

Options

--auto-scaling-group-name (string)

The name of the Auto Scaling group.

--lifecycle-hook-names (list)

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

Syntax:

"string" "string" ...

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See 'aws help' for descriptions of global parameters.

Examples

To describe your lifecycle hooks

This example describes the lifecycle hooks for the specified Auto Scaling group:

aws autoscaling describe-lifecycle-hooks --auto-scaling-group-name my-auto-scaling-group

The following is example output:

{
    "LifecycleHooks": [
        {
            "GlobalTimeout": 172800,
            "HeartbeatTimeout": 3600,
            "RoleARN": "arn:aws:iam::123456789012:role/my-auto-scaling-role",
            "AutoScalingGroupName": "my-auto-scaling-group",
            "LifecycleHookName": "my-lifecycle-hook",
            "DefaultResult": "ABANDON",
            "NotificationTargetARN": "arn:aws:sns:us-west-2:123456789012:my-sns-topic",
            "LifecycleTransition": "autoscaling:EC2_INSTANCE_LAUNCHING"
        }
    ]
}

Output

LifecycleHooks -> (list)

The lifecycle hooks for the specified group.

(structure)

Describes a lifecycle hook, which tells Amazon EC2 Auto Scaling that you want to perform an action whenever it launches instances or whenever it terminates instances.

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

LifecycleHookName -> (string)

The name of the lifecycle hook.

AutoScalingGroupName -> (string)

The name of the Auto Scaling group for the lifecycle hook.

LifecycleTransition -> (string)

The state of the EC2 instance to which you want to attach the lifecycle hook. The following are possible values:

  • autoscaling:EC2_INSTANCE_LAUNCHING
  • autoscaling:EC2_INSTANCE_TERMINATING

NotificationTargetARN -> (string)

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

RoleARN -> (string)

The ARN of the IAM role that allows the Auto Scaling group to publish to the specified notification target.

NotificationMetadata -> (string)

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

HeartbeatTimeout -> (integer)

The maximum time, in seconds, that can elapse before the lifecycle hook times out. If the lifecycle hook times out, Amazon EC2 Auto Scaling performs the default action. You can prevent the lifecycle hook from timing out by calling RecordLifecycleActionHeartbeat .

GlobalTimeout -> (integer)

The maximum time, in seconds, that an instance can remain in a Pending:Wait or Terminating:Wait state. The maximum is 172800 seconds (48 hours) or 100 times HeartbeatTimeout , whichever is smaller.

DefaultResult -> (string)

Defines the action the Auto Scaling group should take when the lifecycle hook timeout elapses or if an unexpected failure occurs. The valid values are CONTINUE and ABANDON . The default value is CONTINUE .