LoopyLuci Docker Registry Operations
Working with image registries.
Auth
docker login
docker login ghcr.io -u USER --password-stdin < token.txt
docker login myregistry.com:5000 -u admin -p password
Tag & Push
docker tag myapp:latest myrepo/myapp:latest
docker push myrepo/myapp:latest
docker push --all-tags myrepo/myapp
Pull
docker pull nginx:alpine
docker pull ghcr.io/owner/image:tag
Cross-Registry
docker pull oldreg.com/myapp:latest
docker tag oldreg.com/myapp:latest newreg.com/myapp:latest
docker push newreg.com/myapp:latest
Multi-Arch
docker buildx build --platform linux/amd64,linux/arm64 \\
-t myrepo/myapp:latest --push .
Pitfalls
- Tags are mutable -- use @sha256: for production
- Docker Hub rate limits anonymous pulls
- GC doesn't free disk until blob deletion