How to retrieve the URL of a Cloud Run service with Google Workflow?

user_12654749 0
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I am used to using CI / CD architecture for my deployments on Cloud Run. Each time a deployment has taken place, I have to manually retrieve the URL that I send to my employees by email. My goal is to automate this task with Google Workflow. How do I retrieve the URL of a new service or the tag of a Cloud Run service with Google Workflow ?

google-workflows google-cloud-run
3 Answers

Put together this returns the URL of a cloud run service

- initialize:
    assign:
      - project: ${sys.get_env("GOOGLE_CLOUD_PROJECT_NUMBER")}
      - zone: us-central1
      - service: service
- getCloudRunDetails:
    call: http.get
    args:
        url: ${"https://"+zone+"-run.googleapis.com/apis/serving.knative.dev/v1/namespaces/"+project+"/services/"+service+"?alt=json"}
        auth:
            type: OAuth2
    result: bitresult
- returnResult:
    return: ${bitresult.body.status.address.url}

the expected output is:

argument: 'null'
endTime: '2020-11-19T23:05:18.232772542Z'
name: projects/<edited>describeCloudRun/executions/<edited>   
result: '"https://<edited>uc.a.run.app"'
startTime: '2020-11-19T23:05:17.769640039Z'
state: SUCCEEDED
workflowRevisionId: 000020-b11

You have your value inside the result key.

user_2437820

This could be easily done with gcloud CLI, however that's currently not an action supported in Cloud Workflows steps. Currently your only option is to use the Get Service REST API endpoint.

Here is an example:

TOKEN="$(gcloud auth print-access-token -q)"

curl -H "Authorization: Bearer $TOKEN" \
  https://us-central1-run.googleapis.com/apis/serving.knative.dev/v1/namespaces/PROJECT_ID/services/SERVICE_NAME?alt=json

In the example above, note us-central1 is the region and replace PROJECT_ID and SERVICE_NAME with yours.

The response will have a JSON document, and its status.address.url will contain the https://[...].run.app URL of your Cloud Run service.

Pro-tip: To find out what REST API calls a gcloud command does (for example gcloud run services describe) add --log-http option.

user_549290

Google now provides built-in workflows connectors, including one for Cloud Run service.

Getting the Cloud Run URL based on a service name can be done as below :

main:
    steps:
        - initialize:
              assign:
                  - project_number: ${sys.get_env("GOOGLE_CLOUD_PROJECT_NUMBER")}
                  - cloud_run_location: europe-west2
                  - cloud_run_service_name: my-service-name
        - get_cloud_run_details:
            call: googleapis.run.v1.namespaces.services.get 
            args:
                name: ${"namespaces/" + project_number + "/services/" + cloud_run_service_name}
                location: ${cloud_run_location}
            result: service_obj
        - assign_vars:
              assign:
                  - service_url: ${service_obj.status.address.url}
user_120760320
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