Provision an Azure Function App and Confirm It Is Running

arazzo: 1.0.1
info:
  title: Provision an Azure Function App and Confirm It Is Running
  summary: Create a function app, poll until it reports a running state, then list its functions.
  description: >-
    The foundational serverless provisioning flow on Azure. The workflow issues
    an ARM create-or-update against the Microsoft.Web/sites resource to stand up
    a Consumption-plan function app, accepts the long-running 202 response, then
    repeatedly reads the site resource until its state reports Running. Once the
    app is healthy it enumerates the deployed functions so the caller has the
    final inventory. Every step spells out its ARM request inline — including the
    required api-version query parameter and the {properties:{...}} envelope — so
    the flow can be read and executed without opening the underlying OpenAPI
    description. All requests are authorized with the azure_auth OAuth2 bearer
    token carried by the Azure Resource Manager endpoint.
  version: 1.0.0
sourceDescriptions:
- name: azureFunctionsApi
  url: ../openapi/azure-functions-management-api.json
  type: openapi
workflows:
- workflowId: provision-function-app
  summary: Create a function app, wait for it to run, and list its functions.
  description: >-
    Creates a Microsoft.Web/sites function app, polls the site resource until it
    reports a Running state, and finally lists the functions deployed into it.
  inputs:
    type: object
    required:
    - subscriptionId
    - resourceGroupName
    - name
    - location
    - serverFarmId
    properties:
      subscriptionId:
        type: string
        description: The Azure subscription identifier (GUID).
      resourceGroupName:
        type: string
        description: The resource group that will contain the function app.
      name:
        type: string
        description: The globally unique name of the function app to create.
      location:
        type: string
        description: The Azure region for the function app (e.g. "East US").
      serverFarmId:
        type: string
        description: The resource id of the App Service plan / serverFarm to host the app.
      apiVersion:
        type: string
        description: The ARM api-version to use for all requests.
        default: "2024-11-01"
  steps:
  - stepId: createFunctionApp
    description: >-
      Create or update the Microsoft.Web/sites resource as a function app. ARM
      returns 202 when the create is accepted as a long-running operation, or 200
      when it completes synchronously.
    operationId: WebApps_CreateOrUpdate
    parameters:
    - name: api-version
      in: query
      value: $inputs.apiVersion
    - name: subscriptionId
      in: path
      value: $inputs.subscriptionId
    - name: resourceGroupName
      in: path
      value: $inputs.resourceGroupName
    - name: name
      in: path
      value: $inputs.name
    requestBody:
      contentType: application/json
      payload:
        kind: functionapp
        location: $inputs.location
        properties:
          serverFarmId: $inputs.serverFarmId
          reserved: false
          httpsOnly: true
    successCriteria:
    - condition: $statusCode == 202
    outputs:
      siteId: $response.body#/id
      initialState: $response.body#/properties/state
    onSuccess:
    - name: waitForApp
      type: goto
      stepId: pollAppState
  - stepId: pollAppState
    description: >-
      Read the function app resource and confirm it reports a Running state. Use
      this step in a retry loop until the state transitions out of provisioning.
    operationId: WebApps_Get
    parameters:
    - name: api-version
      in: query
      value: $inputs.apiVersion
    - name: subscriptionId
      in: path
      value: $inputs.subscriptionId
    - name: resourceGroupName
      in: path
      value: $inputs.resourceGroupName
    - name: name
      in: path
      value: $inputs.name
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.properties.state == "Running"
      type: jsonpath
    outputs:
      appState: $response.body#/properties/state
      defaultHostName: $response.body#/properties/defaultHostName
    onSuccess:
    - name: appRunning
      type: goto
      stepId: listFunctions
  - stepId: listFunctions
    description: >-
      Enumerate the functions deployed into the now-running function app.
    operationId: WebApps_ListFunctions
    parameters:
    - name: api-version
      in: query
      value: $inputs.apiVersion
    - name: subscriptionId
      in: path
      value: $inputs.subscriptionId
    - name: resourceGroupName
      in: path
      value: $inputs.resourceGroupName
    - name: name
      in: path
      value: $inputs.name
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      functions: $response.body#/value
  outputs:
    siteId: $steps.createFunctionApp.outputs.siteId
    appState: $steps.pollAppState.outputs.appState
    defaultHostName: $steps.pollAppState.outputs.defaultHostName
    functions: $steps.listFunctions.outputs.functions