Kubernetes : Deploy Metrics Server2026/05/14

Deploy Metrics Server to monitor CPU and Memory resources in Kubernetes Cluster.

This example is based on the environment like follows.

+----------------------+   +----------------------+
|  [ ctrl.srv.world ]  |   |   [ dlp.srv.world ]  |
|     Manager Node     |   |     Control Plane    |
+-----------+----------+   +-----------+----------+
        eth0|10.0.0.25             eth0|10.0.0.30
            |                          |
------------+--------------------------+-----------
            |                          |
        eth0|10.0.0.51             eth0|10.0.0.52
+-----------+----------+   +-----------+----------+
| [ node01.srv.world ] |   | [ node02.srv.world ] |
|     Worker Node#1    |   |     Worker Node#2    |
+----------------------+   +----------------------+

[1]	Deploy Metrics Server.

ubuntu@ctrl:~$

git clone https://github.com/kubernetes-sigs/metrics-server

ubuntu@ctrl:~$

vi ./metrics-server/manifests/base/deployment.yaml

.....
.....
      containers:
      - name: metrics-server
        image: gcr.io/k8s-staging-metrics-server/metrics-server:master
        imagePullPolicy: IfNotPresent
        args:
          - --cert-dir=/tmp
          - --secure-port=10250
          - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
          - --kubelet-use-node-status-port
          - --metric-resolution=15s
          # line 29 : add
          - --kubelet-insecure-tls

ubuntu@ctrl:~$

kubectl apply -k ./metrics-server/manifests/base/

# Warning: 'commonLabels' is deprecated. Please use 'labels' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
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

ubuntu@ctrl:~$

kubectl get pods -n kube-system

NAME                                    READY   STATUS    RESTARTS      AGE
coredns-589f44dc88-69rnb                1/1     Running   1 (38m ago)   44h
coredns-589f44dc88-lcgqc                1/1     Running   1 (38m ago)   44h
etcd-dlp.srv.world                      1/1     Running   1 (38m ago)   44h
kube-apiserver-dlp.srv.world            1/1     Running   1 (38m ago)   44h
kube-controller-manager-dlp.srv.world   1/1     Running   1 (38m ago)   44h
kube-proxy-758rn                        1/1     Running   1 (38m ago)   44h
kube-proxy-zblkn                        1/1     Running   1 (37m ago)   44h
kube-proxy-zkvbq                        1/1     Running   1 (37m ago)   44h
kube-scheduler-dlp.srv.world            1/1     Running   1 (38m ago)   44h
metrics-server-54bf87486c-7qctk         1/1     Running   0             68s
# [metrics-server] pod has been deployed

[2]	To display CPU and Memory resources, run like follows.

ubuntu@ctrl:~$

kubectl top node

NAME               CPU(cores)   CPU(%)   MEMORY(bytes)   MEMORY(%)
dlp.srv.world      66m          0%       2504Mi          16%
node01.srv.world   17m          0%       1021Mi          6%
node02.srv.world   12m          0%       969Mi           6%

ubuntu@ctrl:~$

kubectl top pod -n kube-system

NAME                                    CPU(cores)   MEMORY(bytes)
coredns-589f44dc88-69rnb                1m           85Mi
coredns-589f44dc88-lcgqc                1m           14Mi
etcd-dlp.srv.world                      12m          92Mi
kube-apiserver-dlp.srv.world            25m          496Mi
kube-controller-manager-dlp.srv.world   7m           131Mi
kube-proxy-758rn                        1m           67Mi
kube-proxy-zblkn                        1m           68Mi
kube-proxy-zkvbq                        1m           67Mi
kube-scheduler-dlp.srv.world            4m           71Mi
metrics-server-54bf87486c-7qctk         2m           19Mi

Matched Content