CloudFormation Tear Down a Stack

arazzo: 1.0.1
info:
  title: CloudFormation Tear Down a Stack
  summary: Disable termination protection, delete the stack, then poll until DELETE_COMPLETE.
  description: >-
    Safely decommissions a stack. Because a stack with termination protection
    enabled cannot be deleted, the workflow first disables termination
    protection, then issues DeleteStack, and finally polls DescribeStacks until
    the stack reaches DELETE_COMPLETE — branching to a failure end if deletion
    fails. Every step spells out its request inline using the AWS query protocol
    so the flow can be read and executed without opening the underlying OpenAPI
    description.
  version: 1.0.0
sourceDescriptions:
- name: cloudformationApi
  url: ../openapi/cloudformation-api.yml
  type: openapi
workflows:
- workflowId: teardown-stack
  summary: Disable termination protection and delete a stack to completion.
  description: >-
    Turns off termination protection, deletes the stack, and waits for the stack
    to fully delete.
  inputs:
    type: object
    required:
    - stackName
    properties:
      stackName:
        type: string
        description: The name or unique ID of the stack to delete.
  steps:
  - stepId: disableProtection
    description: >-
      Disable termination protection so the subsequent DeleteStack call is not
      rejected.
    operationId: updateTerminationProtection
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        StackName: $inputs.stackName
        EnableTerminationProtection: false
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      stackId: $response.body#/UpdateTerminationProtectionResult/StackId
  - stepId: deleteStack
    description: >-
      Issue the stack deletion. After this call returns the stack deletion has
      started and can be polled via DescribeStacks.
    operationId: deleteStack
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        StackName: $inputs.stackName
        DeletionMode: STANDARD
    successCriteria:
    - condition: $statusCode == 200
  - stepId: pollDeletion
    description: >-
      Poll DescribeStacks until the stack is gone. End on DELETE_COMPLETE or
      branch to a failure end on DELETE_FAILED.
    operationId: describeStacks
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        StackName: $inputs.stackName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      stackStatus: $response.body#/DescribeStacksResult/Stacks/0/StackStatus
    onSuccess:
    - name: deleteDone
      type: end
      criteria:
      - context: $response.body
        condition: $.DescribeStacksResult.Stacks[0].StackStatus == "DELETE_COMPLETE"
        type: jsonpath
    - name: deleteFailed
      type: end
      criteria:
      - context: $response.body
        condition: $.DescribeStacksResult.Stacks[0].StackStatus == "DELETE_FAILED"
        type: jsonpath
    - name: stillDeleting
      type: goto
      stepId: pollDeletion
      criteria:
      - context: $response.body
        condition: $.DescribeStacksResult.Stacks[0].StackStatus == "DELETE_IN_PROGRESS"
        type: jsonpath
  outputs:
    stackId: $steps.disableProtection.outputs.stackId
    finalStatus: $steps.pollDeletion.outputs.stackStatus