Container Registries

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Docker Registry(DOCUMENTATION)

Introduction

Container registries store and distribute Docker images. You need a registry to deploy containers to production.

Registry Options

Docker Hub: Public and private repositories.

AWS ECR: Integrated with AWS services.

Google GCR: Integrated with Google Cloud.

GitHub Container Registry: Integrated with GitHub Actions.

Pushing to Registry

bash
# Login
docker login myregistry.com

# Tag image
docker tag myproject:latest myregistry.com/myproject:v1.0.0

# Push
docker push myregistry.com/myproject:v1.0.0

CI/CD Integration

yaml
# GitHub Actions
- name: Build and push
  uses: docker/build-push-action@v5
  with:
    push: true
    tags: ghcr.io/${{ github.repository }}:${{ github.sha }}

Best Practices

  1. Use tags: Never rely on 'latest' in production.
  2. Immutable tags: Use git SHA or semantic versions.
  3. Scan for vulnerabilities: Most registries offer scanning.

Summary

Choose a registry based on your infrastructure. Use immutable tags (git SHA or semver), enable vulnerability scanning, and integrate with CI/CD for automated builds.

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