# Podman & Buildah slide: https://hackmd.io/@HannahLo/podman-and-buildah Docker 功能很完整了，為何要重造輪子？ --- ## Purpose - Rootless for security - Lightweight, run without deamon --- # [Podman](https://podman.io/)  - Podman is a Pod Manager tool - Redhat buildin docker machine Note: - Podman is a **container engine** for developing, managing, and running **Open Container Initiative (OCI)** containers and container images on your Linux System. --- It's easy migrate docker to podman ```shell= dnf install -y podman alias docker=podman ``` Use same command as Docker ```shell= podman ps podman images podman run -d busybox sleep 3600 podman stop --latest ``` --- ## Podman vs Docker - **Rootless** - **Decentralized** - Can running **Pods** - Export yml for k8s Note: Decentralized [What is Podman](https://pandorafms.com/blog/what-is-podman/#:~:text=It%20is%20a%20reference%20to%20the%20Docker%20service%20(daemon).&text=This%20is%20why%20RedHat%20has,service%20(daemon)%20to%20work.) They have decentralized all the components necessary for container management and have individualized them into smaller components that will be used only when necessary. This decentralization offers a large number of advantages that we will see later Podman is capable of running containers in exactly the same way Docker does, but it is also capable of running Pods. [^Pod]:If it sounds like black magic, for now keep in mind that a Pod is a unit where there may be one or more containers. We will delve into these concepts. [^Podman Image]:Imagine that each of the seals in the Podman logo is a container, so what you have is a pod. --- # [Buildah](https://github.com/containers/buildah)  - Rootless - Multiple ways to create image - Dockerfile - Buildah with bash --- ## Play with Buildah [Katacoda](https://www.katacoda.com/courses/containers-without-docker/building-container-images-with-buildah) --- ## Resources - https://developers.redhat.com/blog/2019/02/21/podman-and-buildah-for-docker-users/