[WIP] add libkrun support

[dougsland]

initial code to add libkrun support

[dougsland]

Hi @giuseppe @slp @rhatdan after running the tool, I still see crun as OCIRuntime via podman info, Am I missing a step?

# podman info| grep -i runtime -A 5
  ociRuntime:
    name: crun
    package: crun-1.19.1-1.fc41.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 1.19.1

[dougsland]

@slp could you please help us here? Is the patch good anything missing?

[slp]

Hi @dougsland, thanks for working on this.

Even though we require the installation of crun-krun to install the symlink krun -> crun, krun doesn't really have an entity of its own. Calling crun through krun is just a way to let the first know it needs to use libkrun to run the container with virtualization-based isolation, but the OCI runtime is still crun.

On the other hand, we don't want to default to use krun in AutoSD. Instead, the use of krun should be done on selected containers, launched as quadlets, by adding --runtime=krun to PodmanArgs.

[dougsland]

@slp this script is updating container config in qm.container (which we require) and also podman. Is that good solution to your eyes (only enable when running it)?

[slp]

I still don't think we need to change the runtime globally, but on a per-container basis.