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One of the main advantage of podman is that, it respects the firewall rules. Docker don't do that. Also having rootless podman means if somehow the container went rogue, it cannot have access to your root directory and perform malicious actions.
Also podman is a drop in replacement for docker. It does not need much configurations to setup. If you need compose, you might need to install podman-compose as well.
I always hear podman is a drop in replacement, but every time I try most of my stack doesn't work. Permissions seem to be the issue most of the times, even when I create new volumes. I will try again in a few years probably, but I'm not holding my breath
Look into podman quadlets. Its containers as systemd services, and its excellent. They run as root by default, but can be run at a user level pretty easily. Ive had no permissions issues as long as you define the user/group in the config and ensure they habe the correct rights to the required folders.
It does take translation from docker compose files, but it's entirely doable. Most of the environmental variables translate straight across.
You need to add
:Zto the end of your volume lines, or lowercasezfor shared volumes.I'm running 50+ containers, probably most of the popular ones, and all working fine.
I don't necessarily agree with it, but there's the third option of just disabling SELinux and removing the frustration entirely.
How would a rogue container be able to access the root directory of the host? Wouldn't it just be able to access the data on the docker volumes? Thank you.
~~With root permission you can do chroot.~~
Edit, I did some digging and found that its not the normal files that they can access but can modify kernel parameters and can mount devices and access their files etc. If you want to learn more check https://stackoverflow.com/questions/36425230/privileged-containers-and-capabilities
Can you provide the required arguments for chroot? I've just opened the bash shell of a running container (docker exec -it mycontainer bash) and tried to "break out" using "chroot /". I can't access any files of the host.
https://stackoverflow.com/questions/36425230/privileged-containers-and-capabilities
In an ideal world, sure, but all software has bugs (example vulnerabilities here). Proper security design doesn't ask "how can X happen?" but "what if X happens?" If you break out of a docker container, you have root access to the system because the docker daemon runs as root.
With podman, there is no root docker daemon, so you'd also need privilege escalation in addition to breaking out of the container.