docker-patterns

To set up a secure Docker Compose local development stack, configure Postgres health checks, Redis connectivity, and dependency ordering to coordinate multi-service startup. Persistent volumes and non-root Dockerfile practices further harden the setup.

A multi-stage Dockerfile separates dev, build, and production image patterns to reduce image size and improve runtime safety. You need it when containerizing web services to isolate build dependencies from the final production image.

Troubleshoot Docker container networking by inspecting custom networks and verifying service-name DNS resolution. Use common Docker commands for logs, exec, and networking inspection to debug service discovery issues across multi-service setups.

Docker container security best practices involve applying least-privilege settings: run as non-root users, drop capabilities, use read-only roots, and handle secrets safely. These hardening measures protect multi-service deployments.

Docker Compose services fail when dependency ordering lacks health checks, causing the app to start before Postgres or Redis is ready. Adding health checks and dependency controls ensures the app waits for database connectivity.

A persistent volume strategy for Postgres data in local development uses named volumes to retain database state across container restarts. This ensures reliable data persistence without losing state during multi-service troubleshooting.