kubeadm安装kubernetes1.16.0(二-配置安装metrics-server)

1. 安装metrics-server

• kubeadm默认安装是就安装了coredns
  
• 下载yaml文件
  github的链接metrics-server
  所有的yaml文件都需要下载到本地
  
• 应用
  

2. 问题处理

• 连接node1报错，报错信息为manager.go:111] unable to fully collect metrics: [unable to fully scrape metrics from source kubelet_summary:node1: unable to fetch metrics from Kubelet node1 (node1): Get https://node1:10250/stats/summary?only_cpu_and_memory=true: dial tcp: lookup node1 on 10.96.0.10:53: no such host, unable to fully scrape metrics from source kubelet_summary:node2: unable to fetch metrics from Kubelet node2 (node2): Get https://node2:10250/stats/summary?only_cpu_and_memory=true: dial tcp: lookup node2 on 10.96.0.10:53: no such host]
  
  该问题是服务器节点是自定义hosts，而不是dns，修改coredns的配置即可
  
• 认证失败，报错信息为unable to fully collect metrics: [unable to fully scrape metrics from source kubelet_summary:node2: unable to fetch metrics from Kubelet node2 (node2): Get https://node2:10250/stats/summary?only_cpu_and_memory=true: x509: certificate signed by unknown authority, unable to fully scrape metrics from source kubelet_summary:node1: unable to fetch metrics from Kubelet node1 (node1): Get https://node1:10250/stats/summary?only_cpu_and_memory=true: x509: certificate signed by unknown authority]
  

来源：https://my.oschina.net/wangzongtao/blog/3110936