Metric server not working

[Devika Awasthi]

Hi Team,

we have recently deployed metric server version - 0.3.7 using below yaml:

https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.3.7/components.yaml

with two start up flags:

- /metrics-server

- --kubelet-insecure-tls

- --kubelet-preferred-address-types=InternalIP

It works in 3/4 environments, but fails to work in one of the environments and shows below errors:

E0903 07:24:30.795761 1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/kube-scheduler-ip-172-25-33-99.eu-west-1.compute.internal: no metrics known for pod

E0903 07:24:30.795780 1 reststorage.go:160] unable to fetch pod metrics for pod web-layer/ess-nginx-855477976b-vl4xl: no metrics known for pod

E0903 07:24:30.795787 1 reststorage.go:160] unable to fetch pod metrics for pod ghs-sayt/elasticsearch-master-data-1: no metrics known for pod

Kubernetes version : 1.11.10

Please suggest!!

Thanks,

Devika