Podman: Difference between revisions

Latest revision as of 16:55, 1 May 2024

Installation

Podman can be installed via podman package in the community repository.

# apk add podman

Running as root

To run podman you'll need to enable the cgroups service, consider enabling cgroups v2.

# rc-update add cgroups

# rc-service cgroups start

You might need to restart your machine for this to work properly.

If you are running on top of Btrfs, consider setting storage driver to btrfs:

$ cat /etc/containers/storage.conf

driver = "btrfs"

Running in rootless mode

For rootless support (replace <USER> with your username):

# modprobe tun # echo tun >>/etc/modules # echo <USER>:100000:65536 >/etc/subuid # echo <USER>:100000:65536 >/etc/subgid

Run an example container to verify everything works:

$ podman run --rm hello-world

Docker compose

Podman provides a drop-in replacement for docker compose. The podman-compose package provides this.

Each time that docker compose is used, a warning will remind that this is using podman under the hood. This warning can be squelched permanently by running:

touch /etc/containers/nodocker

@@ Line 1: / Line 1: @@
 == Installation ==
-The Podman package is from the alpine version 3.14 on in the 'community' repository.
+Podman can be installed via {{Pkg|podman}} package in the community repository.
-  apk add podman
+{{Cmd|# apk add podman}}
+=== Running as root ===
-Run an example container to verify everything works
+To run podman you'll need to enable the <code>cgroups</code> service, consider enabling [[OpenRC#cgroups v2|cgroups v2]].
-  podman run --rm hello-world
+{{Cmd|# rc-update add cgroups}}
+{{Cmd|# rc-service cgroups start}}
+You might need to restart your machine for this to work properly.
-For rootless Podman set uid/gid mapping
+If you are running on top of [[Btrfs]], consider setting storage driver to <code>btrfs</code>:
-  usermod --add-subuids 100000-165535 <user>
+{{Cmd|$ cat /etc/containers/storage.conf | grep 'driver ='}}
-  usermod --add-subgids 100000-165535 <user>
-  podman system migrate
+ driver = "btrfs"
+=== Running in rootless mode ===
+For rootless support (replace <USER> with your username):
+{{Cmd|# modprobe tun
+&#35; echo tun >>/etc/modules
+&#35; echo <USER>:100000:65536 >/etc/subuid
+&#35; echo <USER>:100000:65536 >/etc/subgid}}
+Run an example container to verify everything works:
+{{Cmd|$ podman run --rm hello-world}}
+=== Docker compose ===
+Podman provides a drop-in replacement for docker compose. The {{Pkg|podman-compose}} package provides this.
+Each time that docker compose is used, a warning will remind that this is using podman under the hood. This warning can be squelched permanently by running:
+ touch /etc/containers/nodocker
+[[Category:Virtualization]]