Podman and Ubuntu 20.04 LTS
Installation and basic usage of Podman in Ubuntu 20.04 LTS
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I have built a new version of this document for rootless containers and pods at Manage Podman root and rootless containers and pods with Systemd but this document still have useful information.
optional: Uninstall old Docker versions, if any:
sudo apt remove docker
sudo apt remove docker-engine
sudo apt remove docker.io
sudo apt remove containerd runc
Install Podman and Buildah
#!/bin/bash
set -e
# add the repository from Kubic project
echo "deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04/ /" | sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
# and its key
wget -qO - https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04/Release.key | sudo apt-key add -
# install podman and buildah
sudo apt update && sudo apt install -y podman buildah
Configuration files
/etc/containers/registries.conf
, (man registries.conf.5)/usr/share/containers/mounts.conf
and optionally/etc/containers/mounts.conf
/usr/share/containers/seccomp.json
/etc/containers/policy.json
, (man policy.json.5)
Local repository
Docker’s local repository is in /var/lib/docker
but Podman’s local repository is in (based on the Open Containers Initiative (OCI) standards):
/var/lib/containers
~/.local/share/containers
To gracefully move images between /var/lib/docker
and /var/lib/containers
use podman pull
and podman push
like:
# pull from Docker to Podman
systemctl stop docker
podman pull docker-daemon:myfedora:latest
# push from Podman to Docker
podman push myfedora docker-daemon:myfedora:latest
Basic commands
-
podman --help
andpodman <subcommand> --help
-
man podman
andman podman-<subcommand>
-
podman search <search_term>
-
podman search --filter=is-official debian
-
podman search --list-tags docker.io/library/debian
-
podman pull registry.fedoraproject.org/f29/httpd
-
podman images
-
podman run -dt -p 8080:8080/tcp registry.fedoraproject.org/f29/httpd
-
podman ps
andpodman ps -a
-
podman inspect -l
-
podman logs -l
-
podman top -l
-
podman stop -l
-
podman rm -l