kubectl检查组件健康状态异常处理

问题描述

#kubectl get cs

Warning: v1 ComponentStatus is deprecated in v1.19+
NAME                 STATUS      MESSAGE                                                                                       ERROR
controller-manager   Unhealthy   Get "http://127.0.0.1:10252/healthz": dial tcp 127.0.0.1:10252: connect: connection refused   
scheduler            Unhealthy   Get "http://127.0.0.1:10251/healthz": dial tcp 127.0.0.1:10251: connect: connection refused   
etcd-0               Healthy     {"health":"true"}    

问题解决

#组件监测异常，只是监测的端口错误，默认监测10251/10252实际监听的不是这个导致，在有些版本会出现类似的问题，不过不影响集群的正常，显示让人很不爽

#/etc/kubernetes/manifests
[root@localhost kubernetes]# cd manifests/    //static pod
[root@localhost manifests]# ll
-rw------- 1 root root 2149 Dec 11 19:47 etcd.yaml
-rw------- 1 root root 3181 Dec 11 19:47 kube-apiserver.yaml
-rw------- 1 root root 2857 Dec 11 19:47 kube-controller-manager.yaml   //注释 --port=0
-rw------- 1 root root 1413 Dec 11 19:47 kube-scheduler.yaml   //注释 --port=0
[root@localhost manifests]# 
#  - --port=0

#重启kubelet服务，如果集群运行很久不建议重启kubelet服务，可以对kube-controller-manager、kube-scheduler的deployment重启
systemctl restart kubelet.service

[root@c8-100-30 ~]# kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME                 STATUS    MESSAGE             ERROR
controller-manager   Healthy   ok                  
scheduler            Healthy   ok                  
etcd-0               Healthy   {"health":"true"}