# Docker Security Best Practices
Confidence: high
Last verified: 2026-05-22
Generation: human_only


## TL;DR

Docker containers share the host kernel, making security critical. Best practices: run as non-root user, use minimal base images (distroless, alpine), scan images for vulnerabilities, limit capabilities, use read-only root filesystems, enable seccomp/AppArmor profiles.

## Core Explanation

`USER 1000` in Dockerfile (never run as root). `docker scan` or Trivy for vulnerability scanning. `--read-only` flag makes rootfs immutable. `--cap-drop=ALL --cap-add=NET_BIND_SERVICE` limits Linux capabilities. Docker Bench Security checks against CIS Benchmark. Podman (daemonless, rootless by default) and gVisor (user-space kernel) provide stronger isolation.

## Further Reading

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