openapi: 3.0.0 info: version: 2011-01-01 x-release: v4 title: 'Auto Scaling #Action=AttachInstances #Action=AttachInstances #Action=CompleteLifecycleAction API' description: Amazon EC2 Auto Scaling

Amazon EC2 Auto Scaling is designed to automatically launch and terminate EC2 instances based on user-defined scaling policies, scheduled actions, and health checks.

For more information, see the Amazon EC2 Auto Scaling User Guide and the Amazon EC2 Auto Scaling API Reference.

x-logo: url: https://api.apis.guru/v2/cache/logo/https_twitter.com_awscloud_profile_image.png backgroundColor: '#FFFFFF' termsOfService: https://aws.amazon.com/service-terms/ contact: name: Mike Ralphson email: mike.ralphson@gmail.com url: https://github.com/mermade/aws2openapi x-twitter: PermittedSoc license: name: Apache 2.0 License url: http://www.apache.org/licenses/ x-providerName: amazonaws.com x-serviceName: autoscaling x-origin: - contentType: application/json url: https://raw.githubusercontent.com/aws/aws-sdk-js/master/apis/autoscaling-2011-01-01.normal.json converter: url: https://github.com/mermade/aws2openapi version: 1.0.0 x-apisguru-driver: external x-apiClientRegistration: url: https://portal.aws.amazon.com/gp/aws/developer/registration/index.html?nc2=h_ct x-apisguru-categories: - cloud x-preferred: true servers: - url: http://autoscaling.{region}.amazonaws.com variables: region: description: The AWS region enum: - us-east-1 - us-east-2 - us-west-1 - us-west-2 - us-gov-west-1 - us-gov-east-1 - ca-central-1 - eu-north-1 - eu-west-1 - eu-west-2 - eu-west-3 - eu-central-1 - eu-south-1 - af-south-1 - ap-northeast-1 - ap-northeast-2 - ap-northeast-3 - ap-southeast-1 - ap-southeast-2 - ap-east-1 - ap-south-1 - sa-east-1 - me-south-1 default: us-east-1 description: The Auto Scaling multi-region endpoint - url: https://autoscaling.{region}.amazonaws.com variables: region: description: The AWS region enum: - us-east-1 - us-east-2 - us-west-1 - us-west-2 - us-gov-west-1 - us-gov-east-1 - ca-central-1 - eu-north-1 - eu-west-1 - eu-west-2 - eu-west-3 - eu-central-1 - eu-south-1 - af-south-1 - ap-northeast-1 - ap-northeast-2 - ap-northeast-3 - ap-southeast-1 - ap-southeast-2 - ap-east-1 - ap-south-1 - sa-east-1 - me-south-1 default: us-east-1 description: The Auto Scaling multi-region endpoint - url: http://autoscaling.amazonaws.com variables: {} description: The general Auto Scaling endpoint for US East (N. Virginia) - url: https://autoscaling.amazonaws.com variables: {} description: The general Auto Scaling endpoint for US East (N. Virginia) - url: http://autoscaling.{region}.amazonaws.com.cn variables: region: description: The AWS region enum: - cn-north-1 - cn-northwest-1 default: cn-north-1 description: The Auto Scaling endpoint for China (Beijing) and China (Ningxia) - url: https://autoscaling.{region}.amazonaws.com.cn variables: region: description: The AWS region enum: - cn-north-1 - cn-northwest-1 default: cn-north-1 description: The Auto Scaling endpoint for China (Beijing) and China (Ningxia) security: - hmac: [] tags: - name: '#Action=CompleteLifecycleAction' paths: /#Action=CompleteLifecycleAction: parameters: - $ref: '#/components/parameters/X-Amz-Content-Sha256' - $ref: '#/components/parameters/X-Amz-Date' - $ref: '#/components/parameters/X-Amz-Algorithm' - $ref: '#/components/parameters/X-Amz-Credential' - $ref: '#/components/parameters/X-Amz-Security-Token' - $ref: '#/components/parameters/X-Amz-Signature' - $ref: '#/components/parameters/X-Amz-SignedHeaders' get: x-aws-operation-name: CompleteLifecycleAction operationId: GET_CompleteLifecycleAction description:

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 launch template or launch configuration with a user data script that runs while an instance is in a wait state due to a lifecycle hook.

  2. (Optional) Create a Lambda function and a rule that allows Amazon EventBridge to invoke your Lambda function when an instance is put into a wait state due to a lifecycle hook.

  3. (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.

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

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

  6. If you finish before the timeout period ends, send a callback by using the CompleteLifecycleAction API call.

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

responses: '200': description: Success content: text/xml: schema: $ref: '#/components/schemas/CompleteLifecycleActionAnswer' examples: GET_CompleteLifecycleAction200Example: summary: Default GET_CompleteLifecycleAction 200 response x-microcks-default: true value: {} '480': description: ResourceContentionFault content: text/xml: schema: $ref: '#/components/schemas/ResourceContentionFault' examples: GET_CompleteLifecycleAction480Example: summary: Default GET_CompleteLifecycleAction 480 response x-microcks-default: true value: {} parameters: - name: LifecycleHookName in: query required: true description: The name of the lifecycle hook. schema: type: string pattern: '[A-Za-z0-9\-_\/]+' minLength: 1 maxLength: 255 - name: AutoScalingGroupName in: query required: true description: The name of the Auto Scaling group. schema: type: string minLength: 1 maxLength: 1600 x-pattern: '[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*' - name: LifecycleActionToken in: query required: false description: 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. schema: type: string minLength: 36 maxLength: 36 - name: LifecycleActionResult in: query required: true description: The action for the group to take. You can specify either CONTINUE or ABANDON. schema: type: string - name: InstanceId in: query required: false description: The ID of the instance. schema: type: string minLength: 1 maxLength: 19 x-pattern: '[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*' - name: Action in: query required: true schema: type: string enum: - CompleteLifecycleAction - name: Version in: query required: true schema: type: string enum: - 2011-01-01 summary: Amazon EC2 Auto Scaling GET_ Complete Lifecycle Action x-microcks-operation: delay: 0 dispatcher: FALLBACK tags: - '#Action=CompleteLifecycleAction' post: x-aws-operation-name: CompleteLifecycleAction operationId: POST_CompleteLifecycleAction description:

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 launch template or launch configuration with a user data script that runs while an instance is in a wait state due to a lifecycle hook.

  2. (Optional) Create a Lambda function and a rule that allows Amazon EventBridge to invoke your Lambda function when an instance is put into a wait state due to a lifecycle hook.

  3. (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.

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

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

  6. If you finish before the timeout period ends, send a callback by using the CompleteLifecycleAction API call.

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

responses: '200': description: Success content: text/xml: schema: $ref: '#/components/schemas/CompleteLifecycleActionAnswer' examples: POST_CompleteLifecycleAction200Example: summary: Default POST_CompleteLifecycleAction 200 response x-microcks-default: true value: {} '480': description: ResourceContentionFault content: text/xml: schema: $ref: '#/components/schemas/ResourceContentionFault' examples: POST_CompleteLifecycleAction480Example: summary: Default POST_CompleteLifecycleAction 480 response x-microcks-default: true value: {} requestBody: content: text/xml: schema: $ref: '#/components/schemas/CompleteLifecycleActionType' parameters: - name: Action in: query required: true schema: type: string enum: - CompleteLifecycleAction - name: Version in: query required: true schema: type: string enum: - 2011-01-01 summary: Amazon EC2 Auto Scaling POST_ Complete Lifecycle Action x-microcks-operation: delay: 0 dispatcher: FALLBACK tags: - '#Action=CompleteLifecycleAction' components: parameters: X-Amz-Credential: name: X-Amz-Credential in: header schema: type: string required: false X-Amz-SignedHeaders: name: X-Amz-SignedHeaders in: header schema: type: string required: false X-Amz-Security-Token: name: X-Amz-Security-Token in: header schema: type: string required: false X-Amz-Content-Sha256: name: X-Amz-Content-Sha256 in: header schema: type: string required: false X-Amz-Date: name: X-Amz-Date in: header schema: type: string required: false X-Amz-Signature: name: X-Amz-Signature in: header schema: type: string required: false X-Amz-Algorithm: name: X-Amz-Algorithm in: header schema: type: string required: false schemas: CompleteLifecycleActionAnswer: type: object properties: {} XmlStringMaxLen19: type: string minLength: 1 maxLength: 19 x-pattern: '[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*' LifecycleActionResult: type: string ResourceName: type: string minLength: 1 maxLength: 1600 x-pattern: '[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*' CompleteLifecycleActionType: type: object required: - LifecycleHookName - AutoScalingGroupName - LifecycleActionResult title: CompleteLifecycleActionType properties: LifecycleHookName: allOf: - $ref: '#/components/schemas/AsciiStringMaxLen255' - description: The name of the lifecycle hook. AutoScalingGroupName: allOf: - $ref: '#/components/schemas/ResourceName' - description: The name of the Auto Scaling group. LifecycleActionToken: allOf: - $ref: '#/components/schemas/LifecycleActionToken' - description: 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. LifecycleActionResult: allOf: - $ref: '#/components/schemas/LifecycleActionResult' - description: The action for the group to take. You can specify either CONTINUE or ABANDON. InstanceId: allOf: - $ref: '#/components/schemas/XmlStringMaxLen19' - description: The ID of the instance. ResourceContentionFault: {} LifecycleActionToken: type: string minLength: 36 maxLength: 36 AsciiStringMaxLen255: type: string pattern: '[A-Za-z0-9\-_\/]+' minLength: 1 maxLength: 255 securitySchemes: hmac: type: apiKey name: Authorization in: header description: Amazon Signature authorization v4 x-amazon-apigateway-authtype: awsSigv4 externalDocs: description: Amazon Web Services documentation url: https://docs.aws.amazon.com/autoscaling/ x-hasEquivalentPaths: true