虚拟机重启后k8s启动失败 did you specify the right host or port?且node节点NotNotReady

妖狐艹你老母 2022-12-10 14:58 8阅读 0赞

## 1，虚拟机重启后使用kubectl命令报错 ##

The connection to the server x.x.x.x:6443 was refused - did you specify the right host or port?

这是因为swap没有关。

#1，关闭swap
    swapoff -a
    #2，设置swap开机不启动
    #将文件中的/dev/mapper/centos-swap swap swap defaults 0 0这一行注释掉
    vi /etc/fstab
    
    #3,同时调整k8s的swappiness参数
    vi /etc/sysctl.d/k8s.conf
    #添加一行vm.swappiness=0
    
    #4，执行
    sysctl -p /etc/sysctl.d/k8s.conf

## 2，如果没有关闭防火墙，把防火墙也关了 ##

systemctl stop firewalld

并设置开机不启动

systemctl disable firewalld

## 3，kubectl get pods正常，但是发现dashboard打不开。 ##

#1，查看dashboard状态发现Node is not ready
    kubectl -n kubernetes-dashboard get service kubernetes-dashboard
    
    Events:
      Type     Reason        Age    From             Message
      ----     ------        ----   ----             -------
      Warning  NodeNotReady  9m27s  node-controller  Node is not ready
    
    #2，查看node状态发现node的kube-proxy没有启动
    kubectl describe node k8s-node1
    
    Events:
      Type     Reason                           Age                      From                   Message
      ----     ------                           ----                     ----                   -------
      Warning  FailedToStartProxierHealthcheck  33h (x40850 over 3d18h)  kube-proxy, k8s-node1  failed to start proxier healthz on 0.0.0.0:10256: listen tcp 0.0.0.0:10256: bind: address already in use
    
    #3，到node虚拟机上执行 docker ps，发现容器为空。
    #启动kubelet，并设置为开机启动
    systemctl start kubelet
    systemctl enable kubelet
    
    #等待一会docker ps发现kubelet的相关服务启动，dashboard正常打开。