Security Hardening
Container security is about reducing the blast radius if an application is compromised. Docker containers share the host kernel, so without hardening an attacker who escapes a container gains access to everything.
Defense in Depth
What You Will Learn
| Lesson | What It Covers |
|---|---|
| Container Security Basics | Non-root users, capabilities, read-only filesystems |
| Image Security | Minimal base images, vulnerability scanning, digest pinning |
| Secrets Management | File-based secrets, environment variable risks, Compose secrets |
| Security Audit Checklist | Actionable pre-deployment security review |
The Golden Rule
Every container should run with the minimum privileges needed to function. If it does not need root, do not give it root. If it does not need a capability, drop it.