转自：https://www.cnblogs.com/ServerChen/p/13748323.html

1.下载Metrics-Server的yaml文件

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

2.下载Metrics-Server镜像

docker pull zhaoqinchang/metrics-server:0.3.7

3.修改下载的yaml文件

 cat components.yaml 
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: system:aggregated-metrics-reader
  labels:
    rbac.authorization.k8s.io/aggregate-to-view: "true"
    rbac.authorization.k8s.io/aggregate-to-edit: "true"
    rbac.authorization.k8s.io/aggregate-to-admin: "true"
rules:
- apiGroups: ["metrics.k8s.io"]
  resources: ["pods", "nodes"]
  verbs: ["get", "list", "watch"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: metrics-server:system:auth-delegator
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:auth-delegator
subjects:
- kind: ServiceAccount
  name: metrics-server
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: metrics-server-auth-reader
  namespace: kube-system
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
  name: metrics-server
  namespace: kube-system
---
apiVersion: apiregistration.k8s.io/v1beta1
kind: APIService
metadata:
  name: v1beta1.metrics.k8s.io
spec:
  service:
    name: metrics-server
    namespace: kube-system
  group: metrics.k8s.io
  version: v1beta1
  insecureSkipTLSVerify: true
  groupPriorityMinimum: 100
  versionPriority: 100
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: metrics-server
  namespace: kube-system
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: metrics-server
  namespace: kube-system
  labels:
    k8s-app: metrics-server
spec:
  selector:
    matchLabels:
      k8s-app: metrics-server
  template:
    metadata:
      name: metrics-server
      labels:
        k8s-app: metrics-server
    spec:
      serviceAccountName: metrics-server
      volumes:
      # mount in tmp so we can safely use from-scratch images and/or read-only containers
      - name: tmp-dir
        emptyDir: {}
      containers:
      - name: metrics-server
        image: zhaoqinchang/metrics-server:0.3.7    #修改镜像为刚刚拉取下来的镜像
        imagePullPolicy: IfNotPresent
        args:
          - --cert-dir=/tmp
          - --secure-port=4443
        command:                 #添加以下三行command命令
            - /metrics-server
            - --kubelet-preferred-address-types=InternalIP
            - --kubelet-insecure-tls
        ports:
        - name: main-port
          containerPort: 4443
          protocol: TCP
        securityContext:
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          runAsUser: 1000
        volumeMounts:
        - name: tmp-dir
          mountPath: /tmp
      nodeSelector:
        kubernetes.io/os: linux
---
apiVersion: v1
kind: Service
metadata:
  name: metrics-server
  namespace: kube-system
  labels:
    kubernetes.io/name: "Metrics-server"
    kubernetes.io/cluster-service: "true"
spec:
  selector:
    k8s-app: metrics-server
  ports:
  - port: 443
    protocol: TCP
    targetPort: main-port
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: system:metrics-server
rules:
- apiGroups:
  - ""
  resources:
  - pods
  - nodes
  - nodes/stats
  - namespaces
  - configmaps
  verbs:
  - get
  - list
  - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: system:metrics-server
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:metrics-server
subjects:
- kind: ServiceAccount
  name: metrics-server
  namespace: kube-system

4.部署Metrics-Server

kubectl apply  -f components.yaml

[root@master ~]# kubectl apply -f components.yaml 
clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader unchanged
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator unchanged
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader unchanged
Warning: apiregistration.k8s.io/v1beta1 APIService is deprecated in v1.19+, unavailable in v1.22+; use apiregistration.k8s.io/v1 APIService
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io unchanged
serviceaccount/metrics-server unchanged
deployment.apps/metrics-server created
service/metrics-server unchanged
clusterrole.rbac.authorization.k8s.io/system:metrics-server unchanged
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server unchanged

5.查看Metrics-Server pod

[root@master ~]# kubectl get pods -n kube-system
NAME                                       READY   STATUS    RESTARTS   AGE
calico-kube-controllers-6dfcd885bf-t8566   1/1     Running   2          2d6h
calico-node-6zkgg                          1/1     Running   3          2d6h
calico-node-h9994                          1/1     Running   2          2d6h
calico-node-kzrfv                          1/1     Running   2          2d6h
coredns-6d56c8448f-gqf4r                   1/1     Running   2          2d6h
coredns-6d56c8448f-jv477                   1/1     Running   2          2d6h
etcd-master                                1/1     Running   2          2d6h
kube-apiserver-master                      1/1     Running   1          56m
kube-controller-manager-master             1/1     Running   4          2d6h
kube-proxy-k7rd8                           1/1     Running   2          2d6h
kube-proxy-l96pv                           1/1     Running   2          2d6h
kube-proxy-qkdkb                           1/1     Running   2          2d6h
kube-scheduler-master                      1/1     Running   4          2d6h
metrics-server-5549c7694f-ghqgn            1/1     Running   0          25m

6.查看Metrics-Server是否生成了api

[root@master ~]# kubectl api-versions | grep metrics 
metrics.k8s.io/v1beta1

7.使用kubectl命令查看node和pod的监控信息

kubectl get nodes
kubectl get pods

Metrics-Server github连接

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