檢視容器資源報錯

kubectl top nodes

kubectl top pods

[root@master ~]# kubectl top nodes
Error from server (NotFound): the server could not find the requested resource (get services http:heapster:)
[root@master ~]# kubectl top pods
Error from server (NotFound): the server could not find the requested resource (get services http:heapster:)
 

需要安裝 metrics server

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

[root@master ~]# tar zxvf metrics-server-0.3.6.tar.gz
cd /root/metrics-server-0.3.6/deploy/1.8+

修改配置檔案

vi metrics-server-deployment.yaml

# 原始檔
---
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
        image: k8s.gcr.io/metrics-server-amd64:v0.3.6
        imagePullPolicy: Always
        volumeMounts:
        - name: tmp-dir
          mountPath: /tmp
 

# 修改後
---
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
        image: registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-server-amd64:v0.3.6
        imagePullPolicy: IfNotPresent
        ### 新增開始
        command:
        - /metrics-server
        - --kubelet-insecure-tls
        - --kubelet-preferred-address-types=InternalDNS,InternalIP,ExternalDNS,ExternalIP,Hostname
        ### 新增結束
        volumeMounts:
        - name: tmp-dir
          mountPath: /tmp
 

拉取映象

docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-server-amd64:v0.3.6

部署

kubectl apply -f .

[root@master 1.8+]# kubectl apply -f .
clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created
serviceaccount/metrics-server created
deployment.apps/metrics-server created
service/metrics-server created
clusterrole.rbac.authorization.k8s.io/system:metrics-server created
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created

繼續報錯 error: metrics not available yet

這個不是BUG 需要耐心等待一會

[root@master 1.8+]# kubectl top nodes
NAME      CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%
master    140m         3%     3050Mi          38%
worker1   83m          2%     2144Mi          27%
worker2   66m          1%     2095Mi          26%
[root@master 1.8+]# kubectl top pods -n kube-system
NAME                                       CPU(cores)   MEMORY(bytes)
calico-kube-controllers-5569bdd565-65m6j   1m           10Mi
calico-node-dtz4t                          19m          28Mi
calico-node-lfkwr                          21m          32Mi
calico-node-stfz7                          21m          28Mi
coredns-7ff77c879f-9gl2z                   2m           13Mi
coredns-7ff77c879f-l9f27                   3m           12Mi
etcd-master                                13m          278Mi
kube-apiserver-master                      29m          413Mi
kube-controller-manager-master             10m          47Mi
kube-proxy-cmg67                           1m           12Mi
kube-proxy-kc6jz                           1m           14Mi
kube-proxy-whn2j                           1m           14Mi
kube-scheduler-master                      4m           19Mi
metrics-server-7c9f8b966f-chb4w            1m           11Mi

END