Please visit these pages for more details about Kubernetes Metrics Server:
https://github.com/kubernetes-sigs/metrics-server

• Deploying the Kubernetes Metrics Server:
  $ kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml serviceaccount/metrics-server created clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created clusterrole.rbac.authorization.k8s.io/system:metrics-server created rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created service/metrics-server created deployment.apps/metrics-server created apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created
  Check the Metrics Server Pod:
  $ kubectl get pods -n kube-system | grep metrics-server metrics-server-6f7dd4c4c4-5fv57 0/1 Running 0 68s
  
You might notice that the Pod is not starting because of the following error: $ kubectl logs -f metrics-server-6f7dd4c4c4-5fv57 -n kube-system "Failed to scrape node" err="Get \"https://192.168.65.4:10250/stats/summary?only_cpu_and_memory=true\": x509: cannot validate certificate for 192.168.65.4 because it doesn't contain any IP SANs" node="docker-desktop"
To fix that error, run the following command:
$ kubectl patch deployment metrics-server -n kube-system --type 'json' -p '[{"op": "add", "path": "/spec/template/spec/containers/0/args/-", "value": "--kubelet-insecure-tls"}]' deployment.apps/metrics-server patched

• Use Kubernetes Dashboard to visualize metrics:
  
  

To delete Kubernetes Metrics Server:
$ kubectl delete -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml serviceaccount "metrics-server" deleted clusterrole.rbac.authorization.k8s.io "system:aggregated-metrics-reader" deleted clusterrole.rbac.authorization.k8s.io "system:metrics-server" deleted rolebinding.rbac.authorization.k8s.io "metrics-server-auth-reader" deleted clusterrolebinding.rbac.authorization.k8s.io "metrics-server:system:auth-delegator" deleted clusterrolebinding.rbac.authorization.k8s.io "system:metrics-server" deleted service "metrics-server" deleted deployment.apps "metrics-server" deleted apiservice.apiregistration.k8s.io "v1beta1.metrics.k8s.io" deleted