Practical Container Security Checklist for Site Reliability Engineers

A site reliability engineer has published a practical container security checklist aimed at SREs, framing security breaches as a category of reliability incident. The guide covers minimizing attack surfaces through multi-stage Docker builds that reduce image sizes from hundreds of megabytes to around 50MB. It also recommends scanning images for vulnerabilities in CI pipelines, enforcing non-root execution, and applying strict Kubernetes security contexts and network policies. Proper secrets management using external vaults instead of hardcoded environment variables is highlighted as a critical practice. The checklist concludes with a weekly automated audit script to detect privileged containers, root-running workloads, and missing resource limits across Kubernetes clusters.