# Prerequisites
sudo dnf install -y podman podman-docker docker-compose
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# Start Podman
Define a function in ~/.zshrc to make starting up podman easier:
function setup_podman() {
export DOCKER_HOST=unix:///run/user/$UID/podman/podman.sock
systemctl --user enable --now podman.socket
systemctl --user start podman.socket
systemctl --user status podman.socket
alias -g docker='podman'
}
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NB: The commands are not prefixed with sudo.
Example run:
$ setup_podman
● podman.socket - Podman API Socket
Loaded: loaded (/usr/lib/systemd/user/podman.socket; enabled; vendor preset: disabled)
Active: active (listening) since Thu 2021-07-15 19:40:46 BST; 1h 9min ago
Triggers: ● podman.service
Docs: man:podman-system-service(1)
Listen: /run/user/1000/podman/podman.sock (Stream)
CGroup: /user.slice/user-1000.slice/user@1000.service/app.slice/podman.socket
Jul 15 19:40:46 mbana-pc-1 systemd[2339]: Listening on Podman API Socket.
$ which \docker
docker=podman
$ which docker
/usr/bin/podman
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# Build an Image
mkdir /tmp/podman && cd /tmp/podman
cat <<EOF > /tmp/podman/Dockerfile
FROM docker.io/library/alpine:latest
ENTRYPOINT echo 'Podman built container.'
EOF
docker build --quiet --tag rootless-docker --no-cache .
docker run --rm --tty --interactive localhost/rootless-docker:latest
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# Build Output
$ cat /tmp/podman/Dockerfile
FROM docker.io/library/alpine:latest
ENTRYPOINT echo 'Podman built container.'
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
localhost/rootless-docker latest 800a95e3f0ae Less than a second ago 5.87 MB
docker.io/library/alpine latest d4ff818577bc 4 weeks ago 5.87 MB
$ docker run --rm --tty --interactive localhost/rootless-docker
Podman built container.
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# Run an Image
$ docker run --rm --tty --interactive docker.io/library/alpine:latest /bin/sh -c "echo 'Podman ran container.'"
Podman ran container.
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