Support for K8s v1.22

What happened:

I needed to upgrade my K8s cluster to v1.22 in order to pick up fixes for issues related to graceful handling of pre-emptible node terminations. This has some knock-on effects related to ingresses due to some api changes in v1.22. Specifically in dask-gateway, I see the following in the my traefik-daskhub-dask-gateway pods, as the ingress api changed and moved out of beta:

Failed to list *v1beta1.Ingress: the server could not find the requested resource (get ingresses.extensions)"

What you expected to happen:

I expected some issues. 😃

Anything else we need to know?:

I tried simply updating to traefik 2.5, but then run into additional problems. I see that #431 addresses this, but it looks like it is unreleased and there are a lot of other changes in the repo since the 0.9.0 release I’m using.

I am not sure how to proceed. Is there any easy way for me to use v1.22? Tagging @consideRatio from #431.

Environment:

• Dask version: 2021.12.0
• Python version: 3.8
• Operating System: Ubuntu 20
• Install method (conda, pip, source): pip

[martindurant]

I was looking at https://doc.traefik.io/traefik/reference/dynamic-configuration/kubernetes-crd/ ; but I see that while the kubernetes API went to apiextensions.k8s.io/v1 , the traefik spec did not, as you said.

[consideRatio]

Okay I’m quite confident this is resolved by bumping the version of traefik, and that we should be good to go on k8s 1.22 - we just need a new release to reflect this.