Docker vs Podman: Which for Building Images in CI?
Podman is a daemonless, rootless-friendly alternative to Docker with a compatible CLI - but Docker is what CI tooling assumes.
Docker uses a central daemon to build and run containers. Podman is daemonless, runs rootless by default, and mirrors the Docker CLI, so many commands are interchangeable.
| Docker | Podman | |
|---|---|---|
| Architecture | Daemon (dockerd) | Daemonless |
| Rootless | Supported | Default |
| CLI compatibility | n/a | Docker-compatible (alias) |
| Compose | Native (docker compose) | podman-compose / Quadlet |
| CI ecosystem support | Universal | Good, less default tooling |
In CI
Podman’s daemonless, rootless model is attractive for security and for runners where a privileged daemon is awkward. Its Docker-compatible CLI means many pipelines work with minimal changes (often just alias docker=podman). Docker remains the default that nearly all CI actions, registries, and build tools assume, with the smoothest out-of-the-box experience.
Choosing for pipelines
Use Podman when rootless/daemonless security or licensing is a driver and your build steps are CLI-compatible. Stay on Docker for the broadest tooling support and least friction. For building images specifically, also consider BuildKit/Buildah under either engine.
The verdict
Want rootless/daemonless builds and CLI parity: Podman. Want the most universally supported default: Docker. Most pipelines run on either with small adjustments.