Continuous Deployment from git using Cloud Build

You can use Cloud Build to automate builds and deployments to Cloud Run.

You can accomplish this using a Cloud Build trigger to automatically build and deploy your code whenever new commits are pushed to a given branch of a git repository. This includes Cloud Source Repositories, GitHub, or any other repository supported by Cloud Build.

The build trigger does the following:

  • Builds the Docker Image
  • Pushes the image to the Container Registry
  • Deploys a new revision to the Cloud Run service

Setting up continuous deployment with Cloud Build

To automate deployment with Cloud Build:

  1. In your repository root, add a file named cloudbuild.yaml that has these entries:

    steps:
      # build the container image
    - name: 'gcr.io/cloud-builders/docker'
      args: ['build', '-t', 'gcr.io/$PROJECT_ID/[SERVICE-NAME]', '.']
      # push the container image to Container Registry
    - name: 'gcr.io/cloud-builders/docker'
      args: ['push', 'gcr.io/$PROJECT_ID/[SERVICE-NAME]']
      # Deploy container image to Cloud Run
    - name: 'gcr.io/cloud-builders/gcloud'
      args: ['run', 'deploy', '[SERVICE-NAME]', '--image', 'gcr.io/$PROJECT_ID/[SERVICE-NAME]', '--region', '[REGION]','--platform', '[PLATFORM]', '--quiet']
    images:
    - gcr.io/$PROJECT_ID/[SERVICE-NAME]
    

    Replace

    • [PLATFORM] with managed if deploying to fully managed Cloud Run, or with gke if deploying to Cloud Run for Anthos on Google Cloud.
    • [SERVICE-NAME] with the name of the Cloud Run service.
    • [REGION] with the region of the Cloud Run service you are deploying to. If you are using Cloud Run for Anthos on Google Cloud, use --cluster and --cluster-location instead of the --region parameter.
  2. Grant the Cloud Run Admin and Service Account User roles to the Cloud Build service account:

    1. Open the Cloud Build settings page in the Cloud Console:

      Visit the Cloud Build settings page

    2. In the Service account permissions panel, set the status of the Cloud Run Admin role to Enable:

      Screenshot of the Service account permissions page

    3. Select GRANT ACCESS TO ALL SERVICE ACCOUNTS to grant the Service Account User role on all service accounts in the project on your page.

  3. Click Triggers in the left navigation panel to open the Triggers page:

    Visit the Triggers page

    1. Click Create Trigger.

    2. select your repository from the displayed repository list, and click Continue.

      For more information on specifying which branches to autobuild, see Creating a build trigger.

    3. Select cloudbuild.yaml in Build Configuration.

    4. Click Create.

  4. You are finished! From now on, whenever you push to your repository, a build and a deployment to your Cloud Run service is automatically triggered.

Continuous deployment with minimal IAM permissions

When a container is deployed to a Cloud Run service, it runs with the identity of the Runtime Service Account of this Cloud Run service. Because Cloud Build can deploy new containers automatically, Cloud Build needs to be able to act as the Runtime Service Account of your Cloud Run service.

See Deploying artifacts and Setting service account permissions for more information.

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