Appendix. Security Checklist
This appendix covers some important items you should at least think about when considering how best to secure your container deployments. In your environment, it might well not make sense to apply every item, but if you have thought about them, you will be off to a good start. No doubt this list is not absolutely comprehensive!
Are you running all containers as a non-root user? See “Containers Run as Root by Default”.
Are you running any containers with the
--privilegedflag? Are you dropping capabilities that aren’t needed for each image? See “The --privileged Flag and Capabilities”.Are you running containers as read-only where possible? See “Immutable Containers”.
Are you checking for sensitive directories mounted from the host? Are they read-only where possible? How about the Docker socket? See “Mounting Sensitive Directories” and “Mounting the Docker Socket”.
Are you running your CI/CD pipeline in your production cluster? Does it have privileged access or use the Docker socket? See “The Dangers of Docker Build”.
Are you generating signed images, with SBOMs and build attestations? Are you verifying signatures before you deploy containers? See Chapter 7 on supply chain security.
Are you scanning your container images for vulnerabilities? Do you have a process or tooling in place for rebuilding and redeploying containers where the image is found to include vulnerabilities? See Chapter 8 on software vulnerabilities in images.
Are you using a seccomp, ...
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