Container Security Best Practices

Implement Multi-Stage Scanning: Scan at build time, registry admission, and continuously in production. Each stage catches different vulnerability classes and provides defense in depth.

Use Minimal Base Images: Start with distroless or Alpine-based images that contain only essential components. Fewer packages mean smaller attack surface and faster scanning.

Enforce Image Signing: Require cryptographic signatures on all images using Sigstore/Cosign. Reject unsigned images at admission time to prevent supply chain attacks.

Generate and Verify SBOMs: Create SBOMs for all images and verify them at deployment. This enables rapid response when new vulnerabilities are disclosed in dependencies.

Implement Runtime Behavioral Monitoring: Deploy eBPF-based runtime security tools like Falco or Tetragon. Monitor for anomalous behavior that indicates exploitation or compromise.

Apply Least Privilege Principles: Run containers as non-root users, drop unnecessary capabilities, use read-only root filesystems, and apply restrictive security contexts.

Automate Vulnerability Response: Build workflows that automatically create tickets, notify teams, and trigger remediation when critical vulnerabilities are detected.

Maintain Vulnerability SLAs: