metrics-server的示例分析

今天就跟大家聊聊有关metrics-server的示例分析，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。

1 下载项目

git clone https://github.com/kubernetes-incubator/metrics-server.git

2 修改配置文件

cd /root/metrics-server/deploy/1.8+ [root@master 1.8+]# vim metrics-server-deployment.yaml  --- apiVersion: v1 kind: ServiceAccount metadata:   name: metrics-server   namespace: kube-system --- apiVersion: extensions/v1beta1 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         image: k8s.gcr.io/metrics-server-amd64:v0.3.1         imagePullPolicy: Always         command:         - /metrics-server         - --kubelet-insecure-tls         - --kubelet-preferred-address-types=InternalIP         volumeMounts:         - name: tmp-dir           mountPath: /tmp 增加配置         command:         - /metrics-server         - --kubelet-insecure-tls         - --kubelet-preferred-address-types=InternalIP

3 应用配置文件

 kubectl apply -f .

4 查看pod

# kubectl get pod -n kube-system NAME                              READY   STATUS    RESTARTS   AGE calico-node-j85f7                 2/2     Running   2          3h7m calico-node-tbvs4                 2/2     Running   2          3h4m calico-node-zwsts                 2/2     Running   2          3h5m calico-typha-55968bfd7b-zv9vc     1/1     Running   1          3h7m coredns-fb8b8dccf-227fk           1/1     Running   0          54m coredns-fb8b8dccf-xwscm           1/1     Running   0          54m etcd-master                       1/1     Running   1          3h21m kube-apiserver-master             1/1     Running   1          3h21m kube-controller-manager-master    1/1     Running   1          3h21m kube-proxy-ltwbd                  1/1     Running   0          55m kube-proxy-qgrvg                  1/1     Running   0          55m kube-proxy-xnd45                  1/1     Running   0          55m kube-scheduler-master             1/1     Running   1          3h21m metrics-server-58db9f9647-sxtv9   1/1     Running   0          6m42s

5 使用

# kubectl top node NAME     CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%    master   189m         4%     911Mi           24%        node1    98m          2%     432Mi           5%         node2    117m         2%     442Mi           5%         # kubectl top pods NAME                       CPU(cores)   MEMORY(bytes)    net-test-7d6d58cc8-8r28m   0m           1Mi              net-test-7d6d58cc8-k5qdm   0m           1Mi              # kubectl top pods -n kube-system NAME                              CPU(cores)   MEMORY(bytes)    calico-node-j85f7                 29m          59Mi             calico-node-tbvs4                 25m          61Mi             calico-node-zwsts                 27m          60Mi             calico-typha-55968bfd7b-zv9vc     9m           29Mi             coredns-fb8b8dccf-227fk           4m           13Mi             coredns-fb8b8dccf-xwscm           4m           13Mi             etcd-master                       25m          69Mi             kube-apiserver-master             34m          270Mi            kube-controller-manager-master    16m          57Mi             kube-proxy-ltwbd                  1m           17Mi             kube-proxy-qgrvg                  1m           17Mi             kube-proxy-xnd45                  1m           18Mi             kube-scheduler-master             2m           15Mi             metrics-server-58db9f9647-sxtv9   2m           14Mi

6 查看Metrics API数据

启动一个代理以便curl api kubectl proxy --port=8080 #直接查看接口数据： #可获取的资源：nodes和pods # curl localhost:8080/apis/metrics.k8s.io/v1beta1  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"       ]     }   ] }

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