Whale and Seal, Two Playful Friends (Docker and PodMan)
summary
Compares Docker and Podman by highlighting real design differences and measured performance: Podman runs rootless by default using conmon and OCI runtimes, can generate systemd units and Kubernetes specs from running pods, and supports local image builds, while Docker follows its traditional daemon model. Benchmarks using an nginx image and ab show Podman variants (~95s) are noticeably slower than Docker (~60s), largely due to Podman’s user-space networking (slirp); the talk also shows CVE and Linux capability handling tradeoffs and limits.
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chapters (13)
- 0:00Podman and Docker intro
- 2:22Origins and differences
- 4:31Rootless security
- 7:19Docker security issues
- 10:07Podman advanced security
- 13:37Performance tests
- 16:01Root container risks
- 19:15Systemd inside vs outside
- 24:33Commands and compatibility
- 27:25Docker Compose limits
- 30:56Tool evolution
- 33:47Linux distro deps
- 35:35Conclusion & Q&A
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