arazzo: 1.0.1
info:
  title: Amazon EC2 Auto Scaling Configure and Execute Scaling Policy
  summary: Put a scaling policy on a group, confirm it, then manually execute it.
  description: >-
    Sets up a simple scaling policy for an Auto Scaling group and exercises it.
    The workflow puts a scaling policy (capturing the returned policy ARN),
    describes the group's policies to confirm the policy is registered, and then
    executes the policy by name to trigger a scaling activity. 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: configure-and-execute-scaling-policy
  summary: Create a scaling policy, verify it, and execute it for an Auto Scaling group.
  description: >-
    Puts a simple scaling policy on the group, confirms it appears in the group's
    policy list, and executes it to drive a scaling activity.
  inputs:
    type: object
    required:
    - autoScalingGroupName
    - policyName
    - scalingAdjustment
    properties:
      autoScalingGroupName:
        type: string
        description: The name of the Auto Scaling group to attach the policy to.
      policyName:
        type: string
        description: The name of the scaling policy.
      adjustmentType:
        type: string
        description: How the adjustment is interpreted (ChangeInCapacity, ExactCapacity, or PercentChangeInCapacity).
      scalingAdjustment:
        type: integer
        description: The amount to scale by for a SimpleScaling policy (positive adds, negative removes).
      honorCooldown:
        type: boolean
        description: Whether to wait for the cooldown period before executing the policy.
  steps:
  - stepId: putScalingPolicy
    description: >-
      Create or update a simple scaling policy on the Auto Scaling group and
      capture the returned policy ARN.
    operationId: POST_PutScalingPolicy
    parameters:
    - name: Action
      in: query
      value: PutScalingPolicy
    - name: Version
      in: query
      value: 2011-01-01
    requestBody:
      contentType: text/xml
      payload:
        AutoScalingGroupName: $inputs.autoScalingGroupName
        PolicyName: $inputs.policyName
        PolicyType: SimpleScaling
        AdjustmentType: $inputs.adjustmentType
        ScalingAdjustment: $inputs.scalingAdjustment
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      policyArn: $response.body#/PolicyARN
  - stepId: describePolicies
    description: >-
      Describe the policies on the group to confirm the new policy is registered.
    operationId: POST_DescribePolicies
    parameters:
    - name: Action
      in: query
      value: DescribePolicies
    - name: Version
      in: query
      value: 2011-01-01
    requestBody:
      contentType: text/xml
      payload:
        AutoScalingGroupName: $inputs.autoScalingGroupName
        PolicyNames:
        - $inputs.policyName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      firstPolicyName: $response.body#/ScalingPolicies/0/PolicyName
      firstPolicyArn: $response.body#/ScalingPolicies/0/PolicyARN
    onSuccess:
    - name: policyRegistered
      type: goto
      stepId: executePolicy
      criteria:
      - context: $response.body
        condition: $.ScalingPolicies.length > 0
        type: jsonpath
  - stepId: executePolicy
    description: >-
      Execute the scaling policy by name to trigger a scaling activity on the
      group.
    operationId: POST_ExecutePolicy
    parameters:
    - name: Action
      in: query
      value: ExecutePolicy
    - name: Version
      in: query
      value: 2011-01-01
    requestBody:
      contentType: text/xml
      payload:
        AutoScalingGroupName: $inputs.autoScalingGroupName
        PolicyName: $inputs.policyName
        HonorCooldown: $inputs.honorCooldown
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      executeStatus: $statusCode
  outputs:
    policyArn: $steps.putScalingPolicy.outputs.policyArn
    executeStatus: $steps.executePolicy.outputs.executeStatus