Docker Registry

10. Docker Registry

📦 Registry Options Comparison

Registry	Cost	Privacy	Best For
Docker Hub	Free (limited)	Public/Private	Open source, personal
GitHub Container Registry	Free for public	Public/Private	GitHub projects
AWS ECR	Pay per GB	Private	AWS deployments
Google Artifact Registry	Pay per GB	Private	GCP deployments
Azure ACR	Pay per tier	Private	Azure deployments
Self-hosted (Harbor)	Infrastructure cost	Full control	Air-gapped / compliance

🚀 GitHub Container Registry (GHCR)

# Login with personal access token
echo $GITHUB_TOKEN | docker login ghcr.io -u USERNAME --password-stdin

# Tag image for GHCR
docker tag my-app ghcr.io/username/my-app:latest
docker tag my-app ghcr.io/username/my-app:1.0.0

# Push
docker push ghcr.io/username/my-app:latest
docker push ghcr.io/username/my-app:1.0.0

# Pull
docker pull ghcr.io/username/my-app:1.0.0

☁️ AWS ECR (Elastic Container Registry)

# Authenticate to ECR
aws ecr get-login-password --region us-east-1 | \
  docker login --username AWS \
  --password-stdin 123456789.dkr.ecr.us-east-1.amazonaws.com

# Create repository
aws ecr create-repository --repository-name my-app --region us-east-1

# Tag and push
docker tag my-app:latest 123456789.dkr.ecr.us-east-1.amazonaws.com/my-app:latest
docker push 123456789.dkr.ecr.us-east-1.amazonaws.com/my-app:latest

🏗️ Private Registry with Harbor

# Run Harbor (production-grade private registry)
# Download installer from: https://github.com/goharbor/harbor/releases

# After installation:
docker login registry.company.com
docker tag myapp registry.company.com/myproject/myapp:1.0
docker push registry.company.com/myproject/myapp:1.0