HON95-wiki/config/virt-cont/podman.md

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title: Docker breadcrumbs:

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Setup

Podman

Debian

1. Add Kubic repo (pre Debian 11∕Ubuntu 20.10 only):
   1. Install dependencies: apt install curl wget gnupg2
   2. Get OS info: source /etc/os-release
   3. Add repo: echo "deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_${VERSION_ID}/ /" | tee /etc/apt/sources.list.d/kubic-libcontainers.list
   4. Add GPG key (old way): wget -nv https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable/xUbuntu_${VERSION_ID}/Release.key -O- | apt-key add -
2. Install: apt install podman
3. Enable (TODO required?): systemctl enable --now podman.service podman.socket
4. Verify install: podman info
5. (Optional) Add Docker compat stuff:
   1. Set Docket socket path: echo "DOCKER_HOST=unix:///run/podman/podman.sock" >> /etc/environment
   2. Set Docker binary link: ln -s /usr/bin/podman /usr/bin/docker

Arch

1. Install: pacman -S podman
2. (Optional) (TODO required?) Install hostname resolution between containers: pacman -S podman-dnsname
3. (Optional) Add Docker compat stuff:
   1. Install: pacman -S podman-docker
   2. Quiet Docker emulation message: touch /etc/containers/nodocker

Docker Compose

• Alternatively, you can use Podman Compose instead. Podman does provide CI/CD testing with Docker Compose, though, and IMO Podman Compose just doesn't work as well.
• Requires Podman with the Docker compat stuff to be set up.

Debian

1. Install Docker Compose: Docker Documentation: Install Docker Compose.
2. Install command completion: Docker Documentation: Command-line completion.

Arch

1. Install: pacman -S docker-compose

NVIDIA Container Toolkit

TODO

Usage

General

• See Docker usage.
  • Most commands are Docker clones and simply replacing docker with podman in the command will typically work.
  • Configuration files are a bit different.
• Since Podman supports multiple default registries instead of just Docker Hub, it's recommended to prepend docker.io/ to images you expect to find in Docker Hub.

Networking

• IPv6:
  • Doesn't seem to be as broken/neglected as in Docker.
  • Add --ipv6 --subnet=<subnet>/64 to enable on bridges (with NAT and firewalling, like IPv4).

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