Amazon Elastic Beanstalk Deploy Version With Rollback

arazzo: 1.0.1
info:
  title: Amazon Elastic Beanstalk Deploy Version With Rollback
  summary: Deploy a new version, poll the rollout, and roll back to the previous version if it fails.
  description: >-
    A safer deployment flow that captures the environment's currently deployed
    version before rolling out a new one. It deploys the new application version
    with UpdateEnvironment, polls the environment, and branches: when the
    environment returns to Ready the deployment is accepted, but when the
    environment lands in a terminal Terminated status the flow redeploys the
    previously recorded version to roll back. Every step spells out its AWS
    query-protocol request inline so the flow can be read and executed without
    opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: elasticBeanstalkApi
  url: ../openapi/amazon-elastic-beanstalk-openapi.yml
  type: openapi
workflows:
- workflowId: deploy-version-with-rollback
  summary: Deploy a version and roll back to the prior version if the rollout fails.
  description: >-
    Records the current version, deploys the new version, polls the rollout, and
    on a terminal failure redeploys the previously recorded version.
  inputs:
    type: object
    required:
    - environmentName
    - versionLabel
    properties:
      environmentName:
        type: string
        description: The name of the environment to deploy to.
      versionLabel:
        type: string
        description: The new application version label to deploy.
  steps:
  - stepId: recordCurrentVersion
    description: >-
      Describe the environment to record its currently deployed version so it
      can be restored if the new deployment fails.
    operationId: describeEnvironments
    parameters:
    - name: Action
      in: query
      value: DescribeEnvironments
    - name: Version
      in: query
      value: '2010-12-01'
    - name: EnvironmentNames.member.1
      in: query
      value: $inputs.environmentName
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.Environments[0].Status == "Ready"
      type: jsonpath
    outputs:
      environmentId: $response.body#/Environments/0/EnvironmentId
      previousVersion: $response.body#/Environments/0/VersionLabel
  - stepId: deployNewVersion
    description: Deploy the new application version to the environment.
    operationId: updateEnvironment
    parameters:
    - name: Action
      in: query
      value: UpdateEnvironment
    - name: Version
      in: query
      value: '2010-12-01'
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        EnvironmentName: $inputs.environmentName
        VersionLabel: $inputs.versionLabel
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/Status
  - stepId: pollDeployment
    description: >-
      Describe the environment and branch on its status — loop back while it is
      still Updating, end when it returns to Ready, and roll back on a terminal
      Terminated status.
    operationId: describeEnvironments
    parameters:
    - name: Action
      in: query
      value: DescribeEnvironments
    - name: Version
      in: query
      value: '2010-12-01'
    - name: EnvironmentNames.member.1
      in: query
      value: $inputs.environmentName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/Environments/0/Status
      versionLabel: $response.body#/Environments/0/VersionLabel
    onSuccess:
    - name: deploymentComplete
      type: end
      criteria:
      - context: $response.body
        condition: $.Environments[0].Status == "Ready"
        type: jsonpath
    - name: deploymentFailedRollback
      type: goto
      stepId: rollbackVersion
      criteria:
      - context: $response.body
        condition: $.Environments[0].Status == "Terminated"
        type: jsonpath
    - name: keepPolling
      type: goto
      stepId: pollDeployment
      criteria:
      - context: $response.body
        condition: $.Environments[0].Status == "Updating"
        type: jsonpath
  - stepId: rollbackVersion
    description: >-
      Redeploy the previously recorded version to roll the environment back to a
      known-good state after a failed deployment.
    operationId: updateEnvironment
    parameters:
    - name: Action
      in: query
      value: UpdateEnvironment
    - name: Version
      in: query
      value: '2010-12-01'
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        EnvironmentName: $inputs.environmentName
        VersionLabel: $steps.recordCurrentVersion.outputs.previousVersion
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/Status
      restoredVersion: $response.body#/VersionLabel
  outputs:
    environmentId: $steps.recordCurrentVersion.outputs.environmentId
    previousVersion: $steps.recordCurrentVersion.outputs.previousVersion
    finalStatus: $steps.pollDeployment.outputs.status
    rolledBackVersion: $steps.rollbackVersion.outputs.restoredVersion