[feature request] pouch support kubernetes runtime class

[fanux]

About kubernetes runtime class

Support runtime class so the user can select runtime in one kubernetes cluster.

kind: RuntimeClass
apiVersion: node.k8s.io/v1alpha1
metadata:
    name: pouch
spec:
    runtimeHandler: pouch
----
# provides the default sandbox runtime when users don't care about which they're getting.
kind: RuntimeClass
apiVersion: node.k8s.io/v1alpha1
metadata:
  name: sandboxed
spec:
  runtimeHandler: gvisor

for more details about runtime class, we could refer to https://kubernetes.io/docs/concepts/containers/runtime-class/

[allencloud]

Assigned to @starnop to take a look at this.

[starnop]

@fanux @allencloud Thank you for your request, We've actually supported selecting the container runtime to run a pod so far but only for runc and runv. For details, please refer to #1593

In fact, RuntimeClass is an alpha feature, and we will keep following up on this , get more info refers to
https://github.com/kubernetes/community/blob/master/keps/sig-node/0014-runtime-class.md

[allencloud]

@starnop So, an alpha feature of Kubernetes will not bring into PouchContainer, right?
And we will keep an eye on this and make decision whether to introduce that into Pouch, right?

@fanux Could the following way meet your demand?

upported selecting the container runtime to run a pod so far but only for runc and runv

[fanux]

Pouch runc runv meet our demand now, But in the future, we also want to run pouch docker or gvisor in one kubernetes cluster.

[starnop]

I'm looking through the documentation and will support this feature ASAP.

[xiaoxubeii]

@fanux @allencloud Thank you for your request, We've actually supported selecting the container runtime to run a pod so far but only for runc and runv. For details, please refer to #1593

In fact, RuntimeClass is an alpha feature, and we will keep following up on this , get more info refers to
https://github.com/kubernetes/community/blob/master/keps/sig-node/0014-runtime-class.md

My bad, you are right. RuntimeClass is CRI implementation dependent.

[allencloud]

Pouch runc runv meet our demand now, But in the future, we also want to run pouch docker or gvisor in one kubernetes cluster.

@fanux Reasonable. @starnop is looking at this and try to support. Maybe we could discuss further in dingtalk chat group. 😄