arazzo: 1.0.1
info:
  title: Amazon EC2 Auto Scaling Protect Instances From Scale In
  summary: Find a group's instances, mark them protected from scale-in, and confirm the group state.
  description: >-
    Shields specific instances from termination during scale-in. The workflow
    describes the Auto Scaling instances to capture an instance ID, sets instance
    scale-in protection for the supplied instances, and then describes the group
    to confirm its scale-in protection default and current capacity. Every step
    spells out the AWS query-protocol Action and Version inline so the flow can
    be read and executed without opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: autoScalingApi
  url: ../openapi/amazon-ec2-auto-scaling-openapi.yaml
  type: openapi
workflows:
- workflowId: protect-instances-from-scale-in
  summary: Set scale-in protection on instances in a group and verify the group.
  description: >-
    Lists Auto Scaling instances, applies scale-in protection, and describes the
    group to confirm its state.
  inputs:
    type: object
    required:
    - autoScalingGroupName
    - instanceIds
    - protectedFromScaleIn
    properties:
      autoScalingGroupName:
        type: string
        description: The name of the Auto Scaling group.
      instanceIds:
        type: array
        description: One or more instance IDs to protect or unprotect (up to 50).
        items:
          type: string
      protectedFromScaleIn:
        type: boolean
        description: Whether the instances are protected from termination on scale-in.
  steps:
  - stepId: describeAutoScalingInstances
    description: >-
      Describe the Auto Scaling instances to capture details about the first
      instance and its group association.
    operationId: POST_DescribeAutoScalingInstances
    parameters:
    - name: Action
      in: query
      value: DescribeAutoScalingInstances
    - name: Version
      in: query
      value: 2011-01-01
    requestBody:
      contentType: text/xml
      payload:
        InstanceIds: $inputs.instanceIds
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      firstInstanceId: $response.body#/AutoScalingInstances/0/InstanceId
      firstInstanceState: $response.body#/AutoScalingInstances/0/LifecycleState
  - stepId: setInstanceProtection
    description: >-
      Set scale-in protection for the supplied instances in the group.
    operationId: POST_SetInstanceProtection
    parameters:
    - name: Action
      in: query
      value: SetInstanceProtection
    - name: Version
      in: query
      value: 2011-01-01
    requestBody:
      contentType: text/xml
      payload:
        InstanceIds: $inputs.instanceIds
        AutoScalingGroupName: $inputs.autoScalingGroupName
        ProtectedFromScaleIn: $inputs.protectedFromScaleIn
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      protectStatus: $statusCode
  - stepId: describeGroupProtection
    description: >-
      Describe the group to confirm its new-instance scale-in protection default
      and current capacity.
    operationId: POST_DescribeAutoScalingGroups
    parameters:
    - name: Action
      in: query
      value: DescribeAutoScalingGroups
    - name: Version
      in: query
      value: 2011-01-01
    requestBody:
      contentType: text/xml
      payload:
        AutoScalingGroupNames:
        - $inputs.autoScalingGroupName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      newInstancesProtected: $response.body#/AutoScalingGroups/0/NewInstancesProtectedFromScaleIn
      desiredCapacity: $response.body#/AutoScalingGroups/0/DesiredCapacity
  outputs:
    protectStatus: $steps.setInstanceProtection.outputs.protectStatus
    newInstancesProtected: $steps.describeGroupProtection.outputs.newInstancesProtected