1.安装bash-completion工具

yum install bash-completion -y

否则报错：

-bash: _get_comp_words_by_ref: command not found

2.执行bash_completion

source /usr/share/bash-completion/bash_completion

3.加载kubectl completion

source <(kubectl completion bash)         # 在 bash 中设置当前 shell 的自动补全，要先安装 bash-completion 包。
echo "source <(kubectl completion bash)" >> ~/.bashrc      # 在您的 bash shell 中永久的添加自动补全

您还可以为 kubectl 使用一个速记别名，该别名也可以与 completion 一起使用：

alias k=kubectl complete -F __start_kubectl k

验证自动补全的效果（双击 Tab 键）：

[root@k8s-master ~]# kubectl
alpha          attach         completion     debug          edit           help           patch          rollout        top
annotate       auth           config         delete         exec           kustomize      plugin         run            uncordon
api-resources  autoscale      cordon         describe       explain        label          port-forward   scale          version
api-versions   certificate    cp             diff           expose         logs           proxy          set            wait
apply          cluster-info   create         drain          get            options        replace        taint
[root@k8s-master ~]#
[root@k8s-master ~]# kubectl create
clusterrole          cronjob              job                  priorityclass        rolebinding          serviceaccount
clusterrolebinding   deployment           namespace            quota                secret
configmap            ingress              poddisruptionbudget  role                 service