k8s部署metrics-server资源统计模块（kubectl top）

安装K8S

参见centos安装kubernetes，早期的这篇博客，没有部署统计模块，在这里补充。

拉取metrics-server镜像

由于google的镜像仓库需要翻墙，拉取速度才会变快，因此这里使用阿里的镜像。

docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-server-amd64:v0.3.6
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-server-amd64:v0.3.6 k8s.gcr.io/metrics-server-amd64:v0.3.6
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-server-amd64:v0.3.6

部署metrics-server

1. 下载metrics-server的yaml文件，https://github.com/kubernetes-sigs/metrics-server/archive/v0.3.6.tar.gz

2. tar zxvf metrics-server-0.3.6.tar.gz

3. cd /root/metrics-server-0.3.6/deploy/1.8+

4. vi metrics-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:
         - name: tmp-dir
           emptyDir: {
         
         }
         containers:
         - name: metrics-server
           image: k8s.gcr.io/metrics-server-amd64:v0.3.6
           # 修改开始
           imagePullPolicy: IfNotPresent
           command:
           - /metrics-server
           - --kubelet-insecure-tls
           - --kubelet-preferred-address-types=InternalDNS,InternalIP,ExternalDNS,ExternalIP,Hostname
           # 修改结束
           volumeMounts:
           - name: tmp-dir
             mountPath: /tmp
   

5. kubectl apply -f .