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Interview Question
How would you secure container runtimes (e.g., Docker, containerd) in production environments?
Key Points to Cover
- Run containers as non-root with least privileges
- Use seccomp, AppArmor, SELinux profiles for sandboxing
- Scan base images and enforce signed images
- Limit syscalls and kernel capabilities
- Enable runtime monitoring (Falco, eBPF)
Evaluation Rubric
Applies least-privilege principles30% weight
Mentions runtime security hardening30% weight
Includes image scanning/signing20% weight
Covers runtime monitoring tools20% weight
Hints
- 💡Think kernel hardening and container escape prevention.
Common Pitfalls to Avoid
- ⚠️Running containers with root privileges by default.
- ⚠️Neglecting to implement or adequately configure seccomp, AppArmor, or SELinux profiles.
- ⚠️Skipping image vulnerability scanning or not enforcing image signing.
- ⚠️Leaving containers with overly permissive network access or without proper network segmentation.
- ⚠️Failing to implement continuous runtime monitoring and threat detection.
Potential Follow-up Questions
- ❓What’s the risk of privileged containers?
- ❓How would you detect suspicious syscalls?
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