Docker is synonymous with containers, but it’s not the only option. Podman is another open source choice using a container engine, based on the OCI standard. In this article, I’ll help you understand how Podman and Docker are different.
Podman: Podman follows a “daemonless” architecture, which means it does not require a background daemon process (like Docker’s “dockerd”) to manage containers. Instead, each Podman command directly interacts with the container runtime and communicates over the REST API.
Docker: Docker relies on a central daemon process (“dockerd”) that runs in the background, managing containers and handling container lifecycle operations. All Docker client commands communicate with this daemon to perform container-related tasks.
Podman: Podman allows users to create and manage containers as regular users without requiring root privileges. This feature enhances security by isolating container processes from the host system and reducing potential attack surfaces.
Docker: While Docker introduced some rootless features, running entirely rootless containers was not as straightforward as it was in Podman.
Podman: Podman natively supports pods, which are groups of one or more containers that share the same network namespace. Pods are useful when you need to co-locate and network multiple containers together, similar to Kubernetes Pods.
Docker: Historically, Docker lacked native support for pods, but Kubernetes provided similar functionality through its integration with Docker.
Podman: Podman aims to be a compatible drop-in replacement for Docker, and many Docker CLI commands have corresponding equivalents in Podman.
Docker: Docker has been the dominant containerization tool for quite some time, and it has a vast ecosystem with extensive community support and a wide range of third-party tools built around it.
Podman: Podman is part of the broader Open Container Initiative (OCI) community and shares some components with the Docker project, such as libpod, but they have different maintainers.
Docker: Docker has been around for longer and has a more mature ecosystem and community. However, some users appreciated Podman’s more lightweight approach and its ability to run rootless containers.
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