查看集群中 Pod 或 Node 的 CPU 及内存占用，可以使用kubectl top node命令
执行后发现报如下错误，这是因为没有安装 Metrics 服务
W0228 15:00:55.748791 2774 top_node.go:119] Using json format to get metrics. Next release will switch to protocol-buffers, switch early by passing --use-protocol-buffers flag
error: Metrics API not available阅读文档，安装服务：https://github.com/kubernetes-sigs/metrics-server
打开 components.yaml 搜 image 发现镜像源是 k8s.gcr.io/metrics-server/metrics-server, 国内不下来
fuck!! 去 docker hub 搜索个其他的镜像源 dyrnq/metrics-server, 将 components.yaml 中的 k8s.gcr.io/metrics-server/metrics-server 替换为 dyrnq/metrics-server
修改启动参数
- --kubelet-insecure-tls
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostnamekubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yamlbash
# 检查执行，确保出现了 metrics-server
mafei@master:~$ k get po -A | grep "metrics"
# top 命令正常了, 完工
mafei@master:~$ k top pod -A
W0228 15:32:42.454163 35558 top_pod.go:140] Using json format to get metrics. Next release will switch to protocol-buffers, switch early by passing --use-protocol-buffers flag
NAMESPACE NAME CPU(cores) MEMORY(bytes)
kube-system calico-kube-controllers-846b5f484d-xd9rc 1m 17Mi
kube-system calico-node-hdg2c 35m 122Mi
kube-system calico-node-rwk2k 33m 122Mi
kube-system coredns-b5648d655-n6sff 3m 11Mi
kube-system coredns-b5648d655-st4nj 2m 11Mi
kube-system kube-apiserver-master 58m 436Mi
kube-system kube-controller-manager-master 19m 52Mi
kube-system kube-proxy-jft2t 4m 21Mi
kube-system kube-proxy-qbzdv 1m 21Mi
kube-system kube-scheduler-master 3m 18Mi
kube-system metrics-server-6647799c9-4c65s 3m 15Mi
kube-system nodelocaldns-59d8n 3m 12Mi
kube-system nodelocaldns-px57k 2m 13Mi