podman/transfer.md

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.

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.

Existing Step	Podman (and friends)
docker run	podman run
docker exec	podman exec
docker info	podman info
docker inspect	podman inspect
docker logs	podman logs
docker ps	podman ps
docker stats	podman stats

Development Transfer

There are other equivalents for these tools

Existing Step	Podman (and friends)
docker attach	podman attach
docker cp	podman cp
docker build	podman build
docker commit	podman commit
docker container	podman container
docker create	podman create
docker diff	podman diff
docker events	podman events
docker export	podman export
docker history	podman history
docker image	podman image
docker images	podman images
docker import	podman import
docker kill	podman kill
docker load	podman load
docker login	podman login
docker logout	podman logout
docker pause	podman pause
docker ps	podman ps
docker pull	podman pull
docker push	podman push
docker port	podman port
docker restart	podman restart
docker rm	podman rm
docker rmi	podman rmi
docker run	podman run
docker save	podman save
docker search	podman search
docker start	podman start
docker stop	podman stop
docker tag	podman tag
docker top	podman top
docker unpause	podman unpause
docker version	podman version
docker volume	podman volume
docker volume create	podman volume create
docker volume inspect	podman volume inspect
docker volume ls	podman volume ls
docker volume prune	podman volume prune
docker volume rm	podman volume rm
docker system	podman system
docker system df	podman system df
docker system prune	podman system prune
docker system info	podman system info
docker wait	podman wait

**** Use mount to take advantage of the entire linux tool chain rather then just cp. Read here for more information.

Missing commands in podman

Those Docker commands currently do not have equivalents in podman:

Missing command	Description
docker container update	podman does not support altering running containers. We recommend recreating containers with the correct arguments.
docker container rename	podman does not support container rename - or the rename shorthand. We recommend using podman rm and podman create to create a container with a specific name.
docker network
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 secret
docker service
docker stack
docker swarm	podman does not support swarm. We support Kubernetes for orchestration using CRI-O.
docker volume	podman currently supports file volumes. Future enhancement planned to support Docker Volumes Plugins

Missing commands in Docker

The following podman commands do not have a Docker equivalent:

• podman generate
• podman generate kube
• podman container checkpoint
• podman container cleanup
• podman container exists
• podman container refresh
• podman container runlabel
• podman container restore
• podman healthcheck run
• podman image exists
• podman image sign
• podman image trust
• podman mount
• podman play
• podman play kube
• podman pod
• podman pod create
• podman pod exists
• podman pod inspect
• podman pod kill
• podman pod pause
• podman pod ps
• podman pod restart
• podman pod rm
• podman pod start
• podman pod stop
• podman pod top
• podman pod unpause
• podman varlink
• podman umount