kubectl top reports error when viewing container resources

Error from server (NotFound): the server could not find the requested resource (get services http:heapster:)

Reason for error

The k8s cluster is missing the metrics-server component

Install metrics-server

1. Download the yaml file required by metrics-server

Path: https://github.com/kubernetes-sigs/metrics-server/archive/v0.3.6.tar.gz

2. After decompression, enter the…/metrics-server-0.3.6/deploy/1.8+ directory

3. Modify metric-server-deployment.yaml

---
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
        #修改镜像拉取地址为aliyun路径
        image: registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-server-amd64:v0.3.6
        #镜像拉取策略改为IfNotPresent
        imagePullPolicy: IfNotPresent
        #增加command字段与参数：这个是k8s在1.7的新特性，如果是1.16版本的可以不用添加，1.17以后要添加。这个参数的作用是Aggregation允许在      不修改Kubernetes核心代码的同时扩展Kubernetes API
        command:
        - /metrics-server
        - --kubelet-insecure-tls
        - --kubelet-preferred-address-types=InternalDNS,InternalIP,ExternalDNS,ExternalIP,Hostname
        volumeMounts:
        - name: tmp-dir
          mountPath: /tmp

4. Deploy metrics-server

kubectl apply -f .

5. Check pod status

kubectl get pod -n kube-system |grep metrics-server

6. Post-deployment verification

kubectl top nodes
Insert image description here
kubectl top pods -n kube-system

After deploying metrics-server, execute kubectl top. If there is still an error: Metrics not available for pod, the error will be eliminated automatically after a while.

An error occurs when executing kubect top to view container resources.