discover-containers

Optimize Dockerfiles by using multi-stage builds, minimal base images, and layer caching. Remove unnecessary dependencies, consolidate RUN commands, and order instructions from least to most frequently changed to maximize cache hits and minimize final image size.

Docker container networking connects services via user-defined networks, bridge networks, or overlay networks for Kubernetes. Define services in docker-compose or Kubernetes manifests to enable automatic DNS resolution and isolated communication between containers.

Container security involves scanning images for vulnerabilities, running containers with minimal privileges, enforcing network policies, and managing secrets securely. Apply security contexts, use private registries, and implement runtime monitoring to harden containerized applications.

Docker Compose is designed for development and testing workflows with simplified multi-container orchestration. For production, use Kubernetes or container orchestration platforms that provide scaling, high availability, and advanced networking capabilities beyond Compose's scope.

Container registry management involves pushing, pulling, and versioning images in repositories. Tag images clearly, implement access controls, scan for vulnerabilities, and automate cleanup of unused images to maintain registry efficiency and security.

Use Kubernetes for production workloads requiring orchestration, auto-scaling, self-healing, and multi-node deployments. Docker alone suits single-host development; Kubernetes handles complex container lifecycle management, networking, and resource scheduling at scale.