VPA 0.12 is not compatible with k8s 1.21

[cartucciam]

794c87e updates the chart to v6 and the app to 0.12 but 0.12 is only compatible with 1.25+ whereas the chart claims 1.21 support

https://github.com/kubernetes/autoscaler/tree/master/vertical-pod-autoscaler#compatibility

[sebastien-prudhomme]

Hi @cartucciam, the official doc is not always correct.

I can confirm that the recommender is working fine on version 1.21. The updater seems to need version 1.22.

On what version of Kubernetes have you seen a problem?

[cartucciam]

Hi @sebastien-prudhomme, thanks for answering this, we had issues running the chart on
1.21, the eviction stopped working complaining of a legacy API version.

If the updater seems to need version 1.22 why the chart targets k8s >= 1.21 and uses 0.12 as default for its image?

[cartucciam]

We fixed this by setting the updater image back to 0.9.2. The issue remains though as the default values of the chart aren't consistent with its targeting 1.21+

[brsolomon-deloitte]

Confirming this was an issue for us also in that the image tag 0.12.0 broke on Kubernetes 1.21 (as the vertical-pod-autoscaler docs disclose that they will); we needed to set

vertical-pod-autoscaler:
  admissionController:
    image:
      tag: 0.9.2
  updater:
    image:
      tag: 0.9.2
  recommender:
    image:
      tag: 0.9.2

otherwise, the updater was failing to evict pods:

evicting pod hamster-96d4585b7-8blzn failed: Eviction in version "v1" cannot be handled as a Eviction: no kind "Eviction" is registered for version "policy/v1" in scheme "k8s.io/kubernetes/pkg/api/legacyscheme/scheme.go:30"

[sebastien-prudhomme]

I've fixed the Kubernetes minimum version in #349.

[cartucciam]

I've fixed the Kubernetes minimum version in #349.

Thanks!!!