kubernetes 1.19.4 安装metrics-server

kubernetes安装metrics-server

$ mkdir metrics-server
$ cd metrics-server
$ vim metrics-rbac.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    k8s-app: metrics-server
  namespace: kube-system
  name: metrics-server
  
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: system:aggregated-metrics-reader
  labels:
    k8s-app: metrics-server
    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: ClusterRole
metadata:
  name: system:metrics-server
  labels:
    k8s-app: 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: metrics-server:system:auth-delegator
  labels:
    k8s-app: metrics-server
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
  labels:
    k8s-app: metrics-server
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
  name: metrics-server
  namespace: kube-system
---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: system:metrics-server
  labels:
    k8s-app: metrics-server
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:metrics-server
subjects:
- kind: ServiceAccount
  name: metrics-server
  namespace: kube-system

$ vim metrics-api.yaml

apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
  labels:
    k8s-app: metrics-server
  name: v1beta1.metrics.k8s.io
spec:
  group: metrics.k8s.io
  service:
    name: metrics-server
    namespace: kube-system
  version: v1beta1
  groupPriorityMinimum: 100
  insecureSkipTLSVerify: true
  versionPriority: 100

$ vim metrics-deploy.yaml

apiVersion: v1
kind: Service
metadata:
  labels:
    k8s-app: metrics-server
  name: metrics-server
  namespace: kube-system
spec:
  ports:
  - name: https
    port: 443
    protocol: TCP
    targetPort: https
  selector:
    k8s-app: metrics-server
---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: metrics-server
  namespace: kube-system
  labels:
    k8s-app: metrics-server
spec:
  selector:
    matchLabels:
      k8s-app: metrics-server
  strategy:
    rollingUpdate:
      maxUnavailable: 0
  template:
    metadata:
      name: metrics-server
      labels:
        k8s-app: metrics-server
    spec:
      hostNetwork: true
      serviceAccountName: metrics-server
      containers:
      - name: metrics-server
        image: bitnami/metrics-server:0.4.1
        imagePullPolicy: IfNotPresent
        args:
          - --cert-dir=/tmp
          - --secure-port=4443
          - --kubelet-insecure-tls
          - --kubelet-use-node-status-port
          - --kubelet-preferred-address-types=InternalDNS,InternalIP,ExternalDNS,ExternalIP,Hostname
        livenessProbe:
          failureThreshold: 3
          httpGet:
            path: /livez
            port: https
            scheme: HTTPS
          periodSeconds: 10
        readinessProbe:
          failureThreshold: 3
          httpGet:
            path: /readyz
            port: https
            scheme: HTTPS
          periodSeconds: 10
        ports:
        - name: https
          containerPort: 4443
          protocol: TCP
        securityContext:
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          runAsUser: 1000
        resources:
          limits:
            memory: 1Gi
            cpu: 1000m
          requests:
            memory: 1Gi
            cpu: 1000m
        volumeMounts:
        - name: tmp-dir
          mountPath: /tmp
        - name: localtime
          readOnly: true
          mountPath: /etc/localtime
      volumes:
      - name: tmp-dir
        emptyDir: {}
      - name: localtime
        hostPath:
          type: File
          path: /etc/localtime
      nodeSelector:
        kubernetes.io/os: linux

$ kubectl apply -f metrics-rbac.yaml -n kube-system
$ kubectl apply -f metrics-api.yaml -n kube-system
$ kubectl apply -f metrics-deploy.yaml -n kube-system

或者

$ kubectl -f ./

$ kubectl top pods

NAME                      CPU(cores)   MEMORY(bytes)   
myapps-58ff968f8d-jkmgq   0m           1Mi             
myapps-58ff968f8d-s87xz   0m           2Mi  

出现如下信息就可以了