Allow specifying --runtime to specify runtime engine

[PhantomPhoton]

I'm trying to use Kata Containers with podman and I need to be able to run something akin to

podman --runtime /path/to/kata-runtime run ...

However, I don't see a way to specify the runtime in containers.podman.podman_container.

community.docker.docker_container supports

runtime string | Runtime to use for the container.

It would be useful for podman_container to support the same option.

Thank you for your consideration.

[sshnaidm]

@PhantomPhoton I'll be happy to add it, the only thing I can't run it with this runtime now. Do you have specific versions of tools and way to test this? How do I run podman in command line with kata runtime? Does it work?

[sshnaidm]

$ podman --runtime kata run alpine
Invalid command "delete"
ERRO[0000] Removing container 2f028686c8bbaa6def5c196dbeb454bc35b069c111e27801e84a5b3a79183219 from runtime after creation failed 
Error: OCI runtime error: kata: Invalid command "create"

🤷

[PhantomPhoton]

Unfortunately this is one of the changes between kata 2 and 1, kata 1 works with podman, kata 2 broke compatibility until podman supports shimv2, which is not planned.

It does work with V1, if you have an old enough system, but it's a bit of a pain to setup. We compile manually and have some custom patches in play. Apologies for mentioning kata, as I had forgotten that we're stuck on an old version for now.

For the feature, perhaps testing against GVisor would be a lot easier?