Sprint 04

In this sprint, we'll explore Google Cloud Build—its core capabilities—and automate Docker image builds from GitHub into Google Artifact Registry. By the end, you will:

• Grasp Cloud Build features and benefits
• Link a GitHub repo to Cloud Build via triggers
• Automate Docker image builds on merges and push them to Artifact Registry

1. Key Features of Cloud Build

Before writing any pipelines, it’s crucial to understand what Cloud Build offers. Search the official Cloud Build Documentation or the Cloud Console for more details.

2. Set Up a GitHub Trigger

Linking Cloud Build to your GitHub repository allows automated builds on code changes. Follow these steps:

1. Enable the Cloud Build API
   In your GCP project, navigate to APIs & Services » Library and enable Cloud Build API.
2. Create a Build Trigger
   • Go to Cloud Build » Triggers in the Cloud Console.
   • Click Create trigger and choose GitHub as the source.
3. Authorize & Select Repository
   Grant Cloud Build access to your GitHub account and pick the target repository.
4. Configure Trigger Events
   • Trigger on push to the main branch.
   • Optionally, fire on pull-request merges.

3. Define cloudbuild.yaml to Build & Push Docker Images

With your trigger in place, add a cloudbuild.yaml at the root of your repo. This file defines steps to build a Docker image and push it into Artifact Registry.

steps:
  - name: 'gcr.io/cloud-builders/docker'
    args:
      - build
      - -t
      - 'us-central1-docker.pkg.dev/my-project/my-repo/my-app:$SHORT_SHA'
      - .
  - name: 'gcr.io/cloud-builders/docker'
    args:
      - push
      - 'us-central1-docker.pkg.dev/my-project/my-repo/my-app:$SHORT_SHA'
images:
  - 'us-central1-docker.pkg.dev/my-project/my-repo/my-app:$SHORT_SHA'

What happens during execution:

1. Build: Docker builds an image tagged with the commit's short SHA.
2. Push: The image is uploaded to Artifact Registry.
3. Images: Cloud Build tracks uploaded images for logging and metadata.

Sprint 04 Goals Recap

1. Detailed understanding of Cloud Build features
2. GitHub repository integration via build triggers
3. Automated Docker image builds and storage in Artifact Registry

Congratulations—you’ve automated your CI/CD pipeline for Docker images! See you in the next sprint.

Links and References

• Cloud Build Documentation
• Cloud Console
• Artifact Registry Docs
• cloudbuild.yaml Reference