Azure Container Apps Shift Revision Traffic

arazzo: 1.0.1
info:
  title: Azure Container Apps Shift Revision Traffic
  summary: List an app's revisions, shift ingress traffic to a chosen revision, then wait for the change to apply.
  description: >-
    In multiple-revision mode the ingress traffic block decides which revisions
    receive requests. This workflow lists an app's revisions, patches the
    ingress traffic to send all weight to a chosen revision, and polls the app
    until the configuration change settles, branching on the ARM
    provisioningState. Every step spells out its request inline so the flow can
    be read and executed without opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: containerAppsApi
  url: ../openapi/azure-container-apps-openapi.yml
  type: openapi
workflows:
- workflowId: shift-revision-traffic
  summary: Route all ingress traffic to one revision and confirm the change applies.
  description: >-
    Lists the app's revisions to confirm the target revision exists, patches the
    ingress traffic to weight that revision at 100, then polls until the app is
    Succeeded.
  inputs:
    type: object
    required:
    - subscriptionId
    - resourceGroupName
    - containerAppName
    - location
    - targetRevisionName
    properties:
      subscriptionId:
        type: string
        description: The Azure subscription ID.
      resourceGroupName:
        type: string
        description: The name of the resource group.
      containerAppName:
        type: string
        description: The name of the container app.
      location:
        type: string
        description: The Azure region of the app (e.g. eastus).
      targetRevisionName:
        type: string
        description: The revision that should receive all ingress traffic.
      apiVersion:
        type: string
        description: Client API version.
        default: '2023-05-01'
  steps:
  - stepId: listRevisions
    description: >-
      List the app's revisions to confirm the target revision exists before
      shifting traffic to it.
    operationId: ContainerAppsRevisions_ListRevisions
    parameters:
    - name: subscriptionId
      in: path
      value: $inputs.subscriptionId
    - name: resourceGroupName
      in: path
      value: $inputs.resourceGroupName
    - name: containerAppName
      in: path
      value: $inputs.containerAppName
    - name: api-version
      in: query
      value: $inputs.apiVersion
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      revisions: $response.body#/value
  - stepId: shiftTraffic
    description: >-
      Patch the app ingress traffic so the target revision receives all weight,
      supplied in the ARM properties envelope.
    operationId: ContainerApps_Update
    parameters:
    - name: subscriptionId
      in: path
      value: $inputs.subscriptionId
    - name: resourceGroupName
      in: path
      value: $inputs.resourceGroupName
    - name: containerAppName
      in: path
      value: $inputs.containerAppName
    - name: api-version
      in: query
      value: $inputs.apiVersion
    requestBody:
      contentType: application/json
      payload:
        location: $inputs.location
        properties:
          configuration:
            activeRevisionsMode: Multiple
            ingress:
              traffic:
              - revisionName: $inputs.targetRevisionName
                weight: 100
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      containerAppId: $response.body#/id
  - stepId: pollApp
    description: >-
      Read the container app and check its provisioningState, looping while the
      traffic change is still applying and ending once it settles.
    operationId: ContainerApps_Get
    parameters:
    - name: subscriptionId
      in: path
      value: $inputs.subscriptionId
    - name: resourceGroupName
      in: path
      value: $inputs.resourceGroupName
    - name: containerAppName
      in: path
      value: $inputs.containerAppName
    - name: api-version
      in: query
      value: $inputs.apiVersion
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      provisioningState: $response.body#/properties/provisioningState
    onSuccess:
    - name: trafficApplied
      type: end
      criteria:
      - context: $response.body
        condition: $.properties.provisioningState == "Succeeded"
        type: jsonpath
    - name: trafficFailed
      type: end
      criteria:
      - context: $response.body
        condition: $.properties.provisioningState == "Failed" || $.properties.provisioningState == "Canceled"
        type: jsonpath
    - name: keepPolling
      type: goto
      stepId: pollApp
      criteria:
      - context: $response.body
        condition: $.properties.provisioningState == "InProgress"
        type: jsonpath
  outputs:
    containerAppId: $steps.shiftTraffic.outputs.containerAppId
    provisioningState: $steps.pollApp.outputs.provisioningState
    revisions: $steps.listRevisions.outputs.revisions