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Cloud Platforms > Google Cloud Platform (GCP) > Cloud Build

Cloud Build

Author: Venkata Sudhakar

Google Cloud Build is a fully managed CI/CD platform that executes your builds on Google Cloud infrastructure. It imports source code from Cloud Storage, Cloud Source Repositories, GitHub, or Bitbucket and executes a build to produce artifacts.

Key Features:

1. Fully managed - No build server to provision or maintain. Scales automatically.

2. Docker support - Build and push Docker images to Container Registry or Artifact Registry.

3. Build steps - Compose builds from reusable Docker containers (build steps).

4. Triggers - Automatically trigger builds on code pushes, pull requests, or tags.

5. Cloud Deploy integration - Seamlessly integrate with Cloud Deploy for continuous delivery.

The below example shows a cloudbuild.yaml that builds, tests, and deploys a containerized app.

# cloudbuild.yaml
steps:
  # Step 1: Run unit tests
  - name: python:3.11
    entrypoint: pip
    args: [install, -r, requirements.txt]

- name: python:3.11
    entrypoint: python
    args: [-m, pytest, tests/, -v]

# Step 2: Build Docker image
  - name: gcr.io/cloud-builders/docker
    args:
      - build
      - -t
      - gcr.io/$PROJECT_ID/my-app:$COMMIT_SHA
      - -t
      - gcr.io/$PROJECT_ID/my-app:latest
      - .

# Step 3: Push to Container Registry
  - name: gcr.io/cloud-builders/docker
    args: [push, --all-tags, gcr.io/$PROJECT_ID/my-app]

# Step 4: Deploy to Cloud Run
  - name: gcr.io/google.com/cloudsdktool/cloud-sdk
    entrypoint: gcloud
    args:
      - run
      - deploy
      - my-app
      - --image=gcr.io/$PROJECT_ID/my-app:$COMMIT_SHA
      - --region=us-central1
      - --platform=managed

# Store image in artifacts
images:
  - gcr.io/$PROJECT_ID/my-app:$COMMIT_SHA

# Build timeout
timeout: 1200s

# Machine type for faster builds
options:
  machineType: E2_HIGHCPU_8

It gives the following output,

Step 1: Running unit tests... PASSED (24 tests)
Step 2: Building Docker image...
  Successfully built abc123def456
  Tagged: gcr.io/my-project/my-app:a1b2c3d
Step 3: Pushing image... DONE
Step 4: Deploying to Cloud Run...
  Service URL: https://my-app-xyz.run.app
BUILD SUCCESS
Duration: 3m 42s

Cloud Build vs GitHub Actions:

Cloud Build - Native GCP integration, access to GCP resources without extra auth, pay per build minute. Best for GCP-native CI/CD pipelines.

GitHub Actions - Works natively in GitHub, large marketplace of actions, free tier for public repos. Best for multi-cloud or GitHub-centric workflows.

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