metrics-server安裝

To install metrics-server from GitHub on an Amazon EKS cluster using a web browserDownload and extract the latest version of the metrics server code from GitHub.Navigate to the latest release page of the metrics-server project on GitHub metrics-server, then choose a source code archive for the latest release to download it.
NoteIf you are downloading to a remote server, you can use the following curl command, substituting the red text with the latest version number.

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

Navigate to your downloads location and extract the source code archive. For example, if you downloaded the .tar.gz archive, use the following command to extract (substituting your release version).

tar -xzf v0.3.6.tar.gz

Apply all of the YAML manifests in the metrics-server-0.3.6/deploy/1.8+ directory (substituting your release version).

kubectl apply -f metrics-server-0.3.6/deploy/1.8+/

Verify that the metrics-server deployment is running the desired number of pods with the following command.

kubectl get deployment metrics-server -n kube-systemOutput:

NAME             DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
metrics-server   1         1         1            1           56m

需要修改deployment配置如下

      - name: tmp-dir
        emptyDir:                                                                                                       
          sizeLimit: 64Mi
      containers:
      - name: metrics-server
        image: k8s.gcr.io/metrics-server-amd64:v0.3.6
        imagePullPolicy: IfNotPresent
        args:
          - --kubelet-preferred-address-types=InternalIP,Hostname
          - --kubelet-insecure-tls

是metrics-server這個容器不能通過CoreDNS 10.96.0.10:53 解析各Node的主機名，metrics-server連節點時默認是連接節點的主機名，需要加個參數，讓它連接節點的IP，同時因爲10250是https端口，連接它時需要提供證書，所以加上–kubelet-insecure-tls，表示不驗證客戶端證書

sizeLimit 設置空目錄佔用內存大小，pod長期不重啓，容器輸出到 emptydir 的日誌文件設置限制