HorizontalPodAutoscaler does not return TARGETS metrics and returns '<unknown>' on kubectl.
Tomoyuki KOYAMA
Posted on October 1, 2022
I had faced the error: HorizontalPodAutoscaler does not return TARGETS metrics and returns '<unknown>' on kubectl.
Environment
Kubrenetes engine: RKE2 (v1.22.6+rke2r1) x 3 nodes
Solution
First, I tried to run the following command.
kubectl get --raw /apis/metrics.k8s.io/v1beta1"
The command returns an error.
Second, I installed metrics-server to the cluster.
https://github.com/kubernetes-sigs/metrics-server
I retry to run kubectl get --raw /apis/metrics.k8s.io/v1beta1. The command runs successfully.
Third, I fixed kubernetes manifests as summarised below.
- Set 'requests' parameter per container in deployment
- Fix resource specs for HPA
https://github.com/cdsl-research/text-checker/commit/e13c178eaa4e1ab140462bf658a4e477f87babb1
https://github.com/cdsl-research/text-checker/commit/1bcc0dc21fc5f3fd8a7b42064e582e23cff303ab
Finally, the command 'kubectl get hpa' returns values 'TARGETS' successfully.
Posted on October 1, 2022
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