Container Security Hardening: Beyond the Basics of Docker & Kubernetes

Container security goes far beyond scanning images for CVEs. This guide covers defense-in-depth for containerized workloads.

Security Layers

• **Image Security**: Minimal base images (distroless), multi-stage builds, SBOM generation with Syft
• **Runtime Security**: Custom seccomp profiles, AppArmor/SELinux policies, capabilities dropping
• **Rootless Containers**: Running Docker and Kubernetes entirely without root privileges
• **Network Policies**: Zero-trust networking with Cilium and eBPF-based enforcement
• **Runtime Monitoring**: Falco rules for detecting suspicious syscalls, file access patterns, and network anomalies
• **Supply Chain**: Cosign for image signing, Sigstore for provenance attestation, and Kyverno for policy enforcement