Skip to content

Latest commit

 

History

History

07-metrics-server-v0.3.6

README.md

  1. 打开文件metrics-server-deployment.yaml，新增一些内容，如下图为新增的内容：
command:
        - /metrics-server
        - --metric-resolution=30s
        - --kubelet-insecure-tls
        - --kubelet-preferred-address-types=InternalIP,Hostname,InternalDNS,ExternalDNS,ExternalIP
  1. 还是在目录metrics-server-0.3.6/deploy/1.8+/，执行命令kubectl apply -f ./ 3.验证功能
1.节点CPU,MEMORY情况   
[root@master 1.8+]# kubectl top node
NAME      CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%
master    3272m        54%    5138Mi          66%
slave01   3032m        50%    3571Mi          46%
slave02   2978m        49%    2923Mi          37%
   
   
2.执行命令kubectl top pod -n kube-system查看kube-system这个namespace下所有pod的基本情况： 
[root@master 1.8+]# kubectl top pod -n kube-system
NAME                             CPU(cores)   MEMORY(bytes)
coredns-58cc8c89f4-mbdww         15m          11Mi
coredns-58cc8c89f4-xhdx9         18m          12Mi
etcd-master                      69m          315Mi
kube-apiserver-master            151m         272Mi
kube-controller-manager-master   70m          39Mi
kube-flannel-ds-amd64-9jx7b      12m          15Mi
kube-flannel-ds-amd64-h46h6      12m          13Mi
kube-flannel-ds-amd64-n9rbk      12m          12Mi
kube-proxy-px6dt                 8m           13Mi
kube-proxy-z7fb6                 3m           16Mi
kube-proxy-zcmn2                 21m          14Mi
kube-scheduler-master            7m           15Mi
metrics-server-65c88cd8-tdmdk    3m           13Mi

3.再来试试metrics-server的API服务，在master上执行命令kubectl proxy --port=8080，用来开代理端口；

4.再开打一个同样的ssh连接，执行命令curl localhost:8080/apis/metrics.k8s.io/v1beta1/
[root@master ~]# curl localhost:8080/apis/metrics.k8s.io/v1beta1/
{
  "kind": "APIResourceList",
  "apiVersion": "v1",
  "groupVersion": "metrics.k8s.io/v1beta1",
  "resources": [
    {
      "name": "nodes",
      "singularName": "",
      "namespaced": false,
      "kind": "NodeMetrics",
      "verbs": [
        "get",
        "list"
      ]
    },
    {
      "name": "pods",
      "singularName": "",
      "namespaced": true,
      "kind": "PodMetrics",
      "verbs": [
        "get",
        "list"
      ]
    }
  ]
}

5.查看名为kube-apiserver-node1的pod的基本信息，命令是：curl localhost:8080/apis/metrics.k8s.io/v1beta1/namespaces/kube-system/pods/kube-apiserver-master
[root@master ~]# curl localhost:8080/apis/metrics.k8s.io/v1beta1/namespaces/kube-system/pods/kube-apiserver-master
{
  "kind": "PodMetrics",
  "apiVersion": "metrics.k8s.io/v1beta1",
  "metadata": {
    "name": "kube-apiserver-master",
    "namespace": "kube-system",
    "selfLink": "/apis/metrics.k8s.io/v1beta1/namespaces/kube-system/pods/kube-apiserver-master",
    "creationTimestamp": "2020-06-08T02:36:05Z"
  },
  "timestamp": "2020-06-08T02:36:24Z",
  "window": "30s",
  "containers": [
    {
      "name": "kube-apiserver",
      "usage": {
        "cpu": "208017498n",
        "memory": "279780Ki"
      }
    }
  ]
}