1.添加环境变量
[root@master231 ~]# kubectl completion bash > ~/.kube/completion.bash.inc
[root@master231 ~]#
[root@master231 ~]# echo source ‘$HOME/.kube/completion.bash.inc’ >> ~/.bashrc
[root@master231 ~]#
[root@master231 ~]# source ~/.bashrc
[root@master231 ~]#

2.验证自动补全功能

[root@master231 ~]# kubectl # 连续按2次tab键测试能否出现命令
alpha auth cordon diff get patch run version
annotate autoscale cp drain help plugin scale wait
api-resources certificate create edit kustomize port-forward set
api-versions cluster-info debug exec label proxy taint
apply completion delete explain logs replace top
attach config describe expose options rollout uncordon
[root@master231 ~]#

K8S主机巡检流程

1.查看master组件是否正常
[root@master231 ~]# 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”,”reason”:””}
[root@master231 ~]#

2.查看工作节点是否就绪

[root@master231 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master231 Ready control-plane,master 3h7m v1.23.17
worker232 Ready 178m v1.23.17
worker233 Ready 178m v1.23.17
[root@master231 ~]#

3.检查falnnel组件是否正常运行

[root@master231 ~]# kubectl get pods -n kube-flannel -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-flannel-ds-flnbm 1/1 Running 1 (100s ago) 20m 10.0.0.231 master231
kube-flannel-ds-s4vp6 1/1 Running 1 (2m2s ago) 20m 10.0.0.233 worker233
kube-flannel-ds-x6gv8 1/1 Running 1 (97s ago) 20m 10.0.0.232 worker232
[root@master231 ~]#

4.检查cni0和flannel网卡是否存在

与此同时，还要确认cni0和flannel.1网段是否相同。

5.验证网络是否正常

略，参考”验证Pod的CNI网络是否正常”教程即可。

6.检查集群的所有节点是否能够访问互联网

ping baidu.com