Kube-state-metrics: Failed to list *v1beta2.VerticalPodAutoscaler with k8s v1.17

[chinglinwen]

Is this a BUG REPORT or FEATURE REQUEST?:

/kind bug

What happened:

apply kube-state-metrics from helm template

3c0d1af94be5/tools/cache/reflector.go:108: Failed to list *v1beta2.VerticalPodAutoscaler: the server could not find the requested resource (get verticalpodautoscalers.autoscaling.k8s.io)

$ kubectl api-versions|grep scal
autoscaling/v1
autoscaling/v2beta1
autoscaling/v2beta2

What you expected to happen:
no failed to list v1beta2.VerticalPodAutoscaler error

How to reproduce it (as minimally and precisely as possible):

1. helm template kube-state-metrics stable/kube-state-metrics > kube-state-metrics.yaml
2. apply

Anything else we need to know?:

Environment:

• Kubernetes version (use kubectl version):

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.1", GitCommit:"d224476cd0730baca2b6e357d144171ed74192d6", GitTreeState:"clean", BuildDate:"2020-01-14T21:04:32Z", GoVersion:"go1.13.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.2", GitCommit:"59603c6e503c87169aea6106f57b9f242f64df89", GitTreeState:"clean", BuildDate:"2020-01-18T23:22:30Z", GoVersion:"go1.13.5", Compiler:"gc", Platform:"linux/amd64"}

• Kube-state-metrics image version

quay.io/coreos/kube-state-metrics:v1.9.5

[AllDayAlone]

+1

[mikitasolo]

+1

[chinglinwen]

Have a look at the code, If it need just to change the version that would be easy, it turns out that v1 .Spec deleted the Metrics fields, that's complicated to change.

https://godoc.org/k8s.io/api/autoscaling/v1#HorizontalPodAutoscalerSpec
vs
https://godoc.org/k8s.io/api/autoscaling/v2beta1#HorizontalPodAutoscalerSpec

extra Metrics fields

$ grep -r autoscaling|grep k8s.io|grep -v '^vendor'
internal/store/verticalpodautoscaler.go:        autoscaling "k8s.io/autoscaler/vertical-pod-autoscaler/pkg/apis/autoscaling.k8s.io/v1beta2"
internal/store/horizontalpodautoscaler.go:      autoscaling "k8s.io/api/autoscaling/v2beta1"
internal/store/builder.go:      autoscaling "k8s.io/api/autoscaling/v2beta1"
internal/store/builder.go:      vpaautoscaling "k8s.io/autoscaler/vertical-pod-autoscaler/pkg/apis/autoscaling.k8s.io/v1beta2"
internal/store/verticalpodautoscaler_test.go:   k8sautoscaling "k8s.io/api/autoscaling/v1"
internal/store/verticalpodautoscaler_test.go:   autoscaling "k8s.io/autoscaler/vertical-pod-autoscaler/pkg/apis/autoscaling.k8s.io/v1beta2"
internal/store/horizontalpodautoscaler_test.go: autoscaling "k8s.io/api/autoscaling/v2beta1"

here's the easier re-produce steps (with k8s version: v1.17.2 too)

$ ./kube-state-metrics --port=8080 --telemetry-port=8081 --kubeconfig=/home/wen/.kube/config --resources=verticalpodautoscalers
I0520 23:50:01.405957   16922 main.go:89] Using resources verticalpodautoscalers
I0520 23:50:01.406045   16922 main.go:98] Using all namespace
I0520 23:50:01.406061   16922 main.go:119] metric allow-denylisting: Excluding the following lists that were on denylist:
I0520 23:50:01.408708   16922 main.go:166] Testing communication with server
I0520 23:50:01.419107   16922 main.go:171] Running with Kubernetes cluster version: v1.17. git version: v1.17.2. git tree state: clean. commit: 59603c6e503c87169aea6106f57b9f242f64df89. platform: linux/amd64
I0520 23:50:01.419140   16922 main.go:173] Communication with server successful
I0520 23:50:01.419352   16922 main.go:207] Starting metrics server: 0.0.0.0:8080
I0520 23:50:01.419393   16922 main.go:182] Starting kube-state-metrics self metrics server: 0.0.0.0:8081
I0520 23:50:01.419459   16922 metrics_handler.go:96] Autosharding disabled
I0520 23:50:01.419545   16922 builder.go:157] Active resources: verticalpodautoscalers
E0520 23:50:01.421524   16922 reflector.go:153] /home/wen/git/kube-state-metrics/internal/store/builder.go:352: Failed to list *v1.VerticalPodAutoscaler: the server could not find the requested resource (get verticalpodautoscalers.autoscaling.k8s.io)
E0520 23:50:02.423263   16922 reflector.go:153] /home/wen/git/kube-state-metrics/internal/store/builder.go:352: Failed to list *v1.VerticalPodAutoscaler: the server could not find the requested resource (get verticalpodautoscalers.autoscaling.k8s.io)
E0520 23:50:03.424910   16922 reflector.go:153] /home/wen/git/kube-state-metrics/internal/store/builder.go:352: Failed to list *v1.VerticalPodAutoscaler: the server could not find the requested resource (get verticalpodautoscalers.autoscaling.k8s.io)

my diff here: https://gist.github.com/chinglinwen/8af2ae3a4bf2bcd90ae6cd19b11495b9 \
this patch doesn't fix the issue (just for the experiments).

[tariq1890]

Hello! Please note that verticalpodautoscalers are only opt-in and should not be used if you don't have the required CRDs for VPAs.

You can do either of the two
i) The solution here is to disable VPA's here (assuming you're using helm charts).

OR

ii) Install the CRDs : https://github.com/kubernetes/autoscaler/blob/master/vertical-pod-autoscaler/deploy/vpa-beta2-crd.yaml

[tariq1890]

An update: If you have used the helm charts and are facing this issue, please use the latest Chart version: https://github.com/helm/charts/blob/master/stable/kube-state-metrics/Chart.yaml

We have turned off vpas by default.

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