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 # Podman Usage Transfer This document outlines useful information for ops and dev transfer as it relates to infrastructure that utilizes `Podman`. ## Operational Transfer ## Abstract Podman is a tool for managing Pods, Containers, and Container Images. The CLI for Podman is based on the Docker CLI, although Podman does not require a runtime daemon to be running in order to function. Podman also supports the Docker API via the Podman socket activated system service. ## System Tools Many traditional tools will still be useful, such as `pstree`, `nsenter` and `lsns`. As well as some systemd helpers like `systemd-cgls` and `systemd-cgtop` are still just as applicable. ## Equivalents For many troubleshooting and information collection steps, there may be an existing pattern. Following provides equivalent with `Podman` tools for gathering information or jumping into containers, for operational use. ## Development Transfer There are other equivalents for these tools | Existing Step | `Podman` (and friends) | | :--- | :--- | | `docker ` | [`podman`](./docs/source/markdown/podman.1.md) | | `docker attach` | [`podman attach`](./docs/source/markdown/podman-attach.1.md) | | `docker auto-update`|[`podman auto-update`](./docs/source/markdown/podman-auto-update.1.md)| | `docker build` | [`podman build`](./docs/source/markdown/podman-build.1.md) | | `docker commit` | [`podman commit`](./docs/source/markdown/podman-commit.1.md) | | `docker container `|[`podman container`](./docs/source/markdown/podman-container.1.md) | | `docker container prune`|[`podman container prune`](./docs/source/markdown/podman-container-prune.1.md) | | `docker cp` | [`podman cp`](./docs/source/markdown/podman-cp.1.md) | | `docker create` | [`podman create`](./docs/source/markdown/podman-create.1.md) | | `docker diff` | [`podman diff`](./docs/source/markdown/podman-diff.1.md) | | `docker events` | [`podman events`](./docs/source/markdown/podman-events.1.md) | | `docker exec` | [`podman exec`](./docs/source/markdown/podman-exec.1.md) | | `docker export` | [`podman export`](./docs/source/markdown/podman-export.1.md) | | `docker history` | [`podman history`](./docs/source/markdown/podman-history.1.md) | | `docker image` | [`podman image`](./docs/source/markdown/podman-image.1.md) | | `docker images` | [`podman images`](./docs/source/markdown/podman-images.1.md) | | `docker import` | [`podman import`](./docs/source/markdown/podman-import.1.md) | | `docker info` | [`podman info`](./docs/source/markdown/podman-info.1.md) | | `docker inspect` | [`podman inspect`](./docs/source/markdown/podman-inspect.1.md) | | `docker kill` | [`podman kill`](./docs/source/markdown/podman-kill.1.md) | | `docker load` | [`podman load`](./docs/source/markdown/podman-load.1.md) | | `docker login` | [`podman login`](./docs/source/markdown/podman-login.1.md) | | `docker logout` | [`podman logout`](./docs/source/markdown/podman-logout.1.md) | | `docker logs` | [`podman logs`](./docs/source/markdown/podman-logs.1.md) | | `docker manifest `| [`podman manifest`](./docs.source/markdown/podman-manifest.1.md) | | `docker manifest annotate` | [`podman manifest annotate`](./docs/source/markdown/podman-manifest-annotate.1.md) | | `docker manifest create` | [`podman manifest create`](./docs/source/markdown/podman-manifest-create.1.md) | | `docker manifest inspect`| [`podman manifest inspect`](./docs/source/markdown/podman-manifest-inspect.1.md) | | `docker manifest push` | [`podman manifest push`](./docs/source/markdown/podman-manifest-push.1.md) | | `docker manifest rm` | [`podman manifest rm`](./docs.source/markdown/podman-manifest-rm.1.md) | | `docker network ` | [`podman network`](./docs.source/markdown/podman-network.1.md) | | `docker network connect` | [`podman network connect`](./docs/source/markdown/podman-network-connect.1.md) | | `docker network create` | [`podman network create`](./docs/source/markdown/podman-network-create.1.md) | | `docker network disconnect`| [`podman network disconnect`](./docs/source/markdown/podman-network-disconnect.1.md)| | `docker network inspect` | [`podman network inspect`](./docs/source/markdown/podman-network-inspect.1.md) | | `docker network ls` | [`podman network ls`](./docs/source/markdown/podman-network-ls.1.md) | | `docker network rm` | [`podman network rm`](./docs.source/markdown/podman-network-rm.1.md) | | `docker pause` | [`podman pause`](./docs/source/markdown/podman-pause.1.md) | | `docker port` | [`podman port`](./docs/source/markdown/podman-port.1.md) | | `docker ps` | [`podman ps`](./docs/source/markdown/podman-ps.1.md) | | `docker pull` | [`podman pull`](./docs/source/markdown/podman-pull.1.md) | | `docker push` | [`podman push`](./docs/source/markdown/podman-push.1.md) | | `docker rename` | [`podman rename`](./docs/source/markdown/podman-rename.1.md) | | `docker restart` | [`podman restart`](./docs/source/markdown/podman-restart.1.md) | | `docker rm` | [`podman rm`](./docs/source/markdown/podman-rm.1.md) | | `docker rmi` | [`podman rmi`](./docs/source/markdown/podman-rmi.1.md) | | `docker run` | [`podman run`](./docs/source/markdown/podman-run.1.md) | | `docker save` | [`podman save`](./docs/source/markdown/podman-save.1.md) | | `docker search` | [`podman search`](./docs/source/markdown/podman-search.1.md) | | `docker secret ` | [`podman secret`](./docs/source/markdown/podman-secret.1.md) | | `docker secret create` | [`podman secret`](./docs/source/markdown/podman-secret-create.1.md) | | `docker secret inspect` | [`podman secret`](./docs/source/markdown/podman-secret-inspect.1.md)| | `docker secret ls` | [`podman secret`](./docs/source/markdown/podman-secret-ls.1.md)| | `docker secret rm` | [`podman secret`](./docs/source/markdown/podman-secret-rm.1.md)| | `docker service` | [`podman service`](./docs/source/markdown/podman-service.1.md) | | `docker start` | [`podman start`](./docs/source/markdown/podman-start.1.md) | | `docker stats` | [`podman stats`](./docs/source/markdown/podman-stats.1.md) | | `docker stop` | [`podman stop`](./docs/source/markdown/podman-stop.1.md) | | `docker system ` | [`podman system`](./docs/source/markdown/podman-system.1.md) | | `docker system df` | [`podman system df`](./docs/source/markdown/podman-system-df.1.md) | | `docker system events` | [`podman system events`](./docs/source/markdown/podman-events.1.md) | | `docker system info` | [`podman system info`](./docs/source/markdown/podman-system-info.1.md) | | `docker system prune` | [`podman system prune`](./docs/source/markdown/podman-system-prune.1.md)| | `docker tag` | [`podman tag`](./docs/source/markdown/podman-tag.1.md) | | `docker top` | [`podman top`](./docs/source/markdown/podman-top.1.md) | | `docker unpause` | [`podman unpause`](./docs/source/markdown/podman-unpause.1.md) | | `docker version` | [`podman version`](./docs/source/markdown/podman-version.1.md) | | `docker volume `| [`podman volume`](./docs/source/markdown/podman-volume.1.md) | | `docker volume create` | [`podman volume create`](./docs/source/markdown/podman-volume-create.1.md) | | `docker volume inspect`| [`podman volume inspect`](./docs/source/markdown/podman-volume-inspect.1.md)| | `docker volume ls` | [`podman volume ls`](./docs/source/markdown/podman-volume-ls.1.md) | | `docker volume prune` | [`podman volume prune`](./docs/source/markdown/podman-volume-prune.1.md) | | `docker volume rm` | [`podman volume rm`](./docs/source/markdown/podman-volume-rm.1.md) | | `docker wait` | [`podman wait`](./docs/source/markdown/podman-wait.1.md) | ## Behavioural differences and pitfalls These commands behave differently from the commands in Docker: | Command | Description | | :--- | :--- | | `podman volume create` | While `docker volume create` is idempotent, `podman volume create` raises an error if the volume does already exist. See this [docker issue](https://github.com/moby/moby/issues/16068) for more information.| | `podman run -v /tmp/noexist:/tmp ...` | While `docker run -v /tmp/noexist:/tmp` will create non existing volumes on the host, Podman will report that the volume does not exist. The Podman team sees this as a bug in Docker.| ## Missing commands in podman Those Docker commands currently do not have equivalents in `podman`: | Missing command | Description| | :--- | :--- | | `docker builder` || | `docker buildx` || | `docker config` || | `docker context` || | `docker container update` | podman does not support altering running containers. We recommend recreating containers with the correct arguments.| | `docker node` || | `docker plugin` | podman does not support plugins. We recommend you use alternative OCI Runtimes or OCI Runtime Hooks to alter behavior of podman.| | `docker stack` || | `docker swarm` | podman does not support swarm. We support Kubernetes for orchestration using [CRI-O](https://github.com/cri-o/cri-o).| | `docker trust` |[`podman image trust`](./docs/source/markdown/podman-image-trust.1.md) | | `docker update` || ## Missing commands in Docker The following podman commands do not have a Docker equivalent: * [`podman container checkpoint`](/docs/source/markdown/podman-container-checkpoint.1.md) * [`podman container cleanup`](/docs/source/markdown/podman-container-cleanup.1.md) * [`podman container exists`](/docs/source/markdown/podman-container-exists.1.md) * [`podman container refresh`](/docs/source/markdown/podman-container-refresh.1.md) * [`podman container restore`](/docs/source/markdown/podman-container-restore.1.md) * [`podman container runlabel`](/docs/source/markdown/podman-container-runlabel.1.md) * [`podman generate `](./docs/source/markdown/podman-generate.1.md) * [`podman generate kube`](./docs/source/markdown/podman-generate-kube.1.md) * [`podman generate systemd`](./docs/source/markdown/podman-generate-systemd.1.md) * [`podman healthcheck `](/docs/source/markdown/podman-healthcheck.1.md) * [`podman healthcheck run`](/docs/source/markdown/podman-healthcheck-run.1.md) * [`podman image diff`](./docs/source/markdown/podman-image-diff.1.md) * [`podman image exists`](./docs/source/markdown/podman-image-exists.1.md) * [`podman image mount`](./docs/source/markdown/podman-image-mount.1.md) * [`podman image prune`](./docs/source/markdown/podman-image-prune.1.md) * [`podman image sign`](./docs/source/markdown/podman-image-sign.1.md) * [`podman image tree`](./docs/source/markdown/podman-image-tree.1.md) * [`podman image trust`](./docs/source/markdown/podman-image-trust.1.md) * [`podman image unmount`](./docs/source/markdown/podman-image-unmount.1.md) * [`podman init`](./docs/source/markdown/podman-init.1.md) * [`podman machine `](./docs/source/markdown/podman-machine.1.md) * [`podman machine init`](./docs/source/markdown/podman-machine-init.1.md) * [`podman machine list`](./docs/source/markdown/podman-machine-list.1.md) * [`podman machine rm`](./docs/source/markdown/podman-machine-rm.1.md) * [`podman machine ssh`](./docs/source/markdown/podman-machine-ssh.1.md) * [`podman machine start`](./docs/source/markdown/podman-machine-start.1.md) * [`podman machine stop`](./docs/source/markdown/podman-machine-stop.1.md) * [`podman manifest add`](./docs/source/markdown/podman-manifest-add.1.md) * [`podman manifest exists`](./docs/source/markdown/podman-manifest-exists.1.md) * [`podman manifest remove`](./docs/source/markdown/podman-manifest-remove.1.md) * [`podman mount`](./docs/source/markdown/podman-mount.1.md) * [`podman network exists`](./docs/source/markdown/podman-network-exists.1.md) * [`podman network prune`](./docs/source/markdown/podman-network-prune.1.md) * [`podman network reload`](./docs/source/markdown/podman-network-reload.1.md) * [`podman play `](./docs/source/markdown/podman-play.1.md) * [`podman play kube`](./docs/source/markdown/podman-play-kube.1.md) * [`podman pod `](./docs/source/markdown/podman-pod.1.md) * [`podman pod create`](./docs/source/markdown/podman-pod-create.1.md) * [`podman pod exists`](./docs/source/markdown/podman-pod-exists.1.md) * [`podman pod inspect`](./docs/source/markdown/podman-pod-inspect.1.md) * [`podman pod kill`](./docs/source/markdown/podman-pod-kill.1.md) * [`podman pod pause`](./docs/source/markdown/podman-pod-pause.1.md) * [`podman pod prune`](./docs/source/markdown/podman-pod-prune.1.md) * [`podman pod ps`](./docs/source/markdown/podman-pod-ps.1.md) * [`podman pod restart`](./docs/source/markdown/podman-pod-restart.1.md) * [`podman pod rm`](./docs/source/markdown/podman-pod-rm.1.md) * [`podman pod start`](./docs/source/markdown/podman-pod-start.1.md) * [`podman pod stats`](./docs/source/markdown/podman-pod-stats.1.md) * [`podman pod stop`](./docs/source/markdown/podman-pod-stop.1.md) * [`podman pod top`](./docs/source/markdown/podman-pod-top.1.md) * [`podman pod unpause`](./docs/source/markdown/podman-pod-unpause.1.md) * [`podman system connection `](./docs/source/markdown/podman-system-connection.1.md) * [`podman system connection add`](./docs/source/markdown/podman-system-connection-add.1.md) * [`podman system connection default`](./docs/source/markdown/podman-system-connection-default.1.md) * [`podman system connection list`](./docs/source/markdown/podman-system-connection-list.1.md) * [`podman system connection remove`](./docs/source/markdown/podman-system-connection-remove.1.md) * [`podman system connection rename`](./docs/source/markdown/podman-system-connection-rename.1.md) * [`podman system migrate`](./docs/source/markdown/podman-system-connection-migrate.1.md) * [`podman system renumber`](./docs/source/markdown/podman-system-connection-renumber.1.md) * [`podman system reset`](./docs/source/markdown/podman-system-connection-reset.1.md) * [`podman system service`](./docs/source/markdown/podman-system-connection-service.1.md) * [`podman unmount`](./docs/source/markdown/podman-unmount.1.md) * [`podman unshare`](./docs/source/markdown/podman-unshare.1.md) * [`podman untag`](./docs/source/markdown/podman-untag.1.md) * [`podman volume exists`](./docs/source/markdown/podman-volume-exists.1.md)
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