[root@master-test ~]# kubectl --help
kubectl controls the Kubernetes cluster manager.
 
 
Find more information at: https://kubernetes.io/docs/reference/kubectl/overview/
 
 
Basic Commands (Beginner):
  create         Create a resource from a file or from stdin.
  expose         使用 replication controller, service, deployment 或者 pod 並暴露它作為一個 新的
Kubernetes Service
  run            在叢集中執行一個指定的映象
  set            為 objects 設定一個指定的特徵
 
 
Basic Commands (Intermediate):
  explain        檢視資源的文件
  get            顯示一個或更多 resources
  edit           在伺服器上編輯一個資源
  delete         Delete resources by filenames, stdin, resources and names, or by resources and label selector
 
 
Deploy Commands:
  rollout        Manage the rollout of a resource
  scale          Set a new size for a Deployment, ReplicaSet or Replication Controller
  autoscale      自動調整一個 Deployment, ReplicaSet, 或者 ReplicationController 的副本數量
 
 
Cluster Management Commands:
  certificate    修改 certificate 資源.
  cluster-info   顯示叢集資訊
  top            Display Resource (CPU/Memory/Storage) usage.
  cordon         標記 node 為 unschedulable
  uncordon       標記 node 為 schedulable
  drain          Drain node in preparation for maintenance
  taint          更新一個或者多個 node 上的 taints
 
 
Troubleshooting and Debugging Commands:
  describe       顯示一個指定 resource 或者 group 的 resources 詳情
  logs           輸出容器在 pod 中的日誌
  attach         Attach 到一個執行中的 container
  exec           在一個 container 中執行一個命令
  port-forward   Forward one or more local ports to a pod
  proxy          執行一個 proxy 到 Kubernetes API server
  cp             複製 files 和 directories 到 containers 和從容器中複製 files 和 directories.
  auth           Inspect authorization
 
 
Advanced Commands:
  diff           Diff live version against would-be applied version
  apply          通過檔名或標準輸入流(stdin)對資源進行配置
  patch          使用 strategic merge patch 更新一個資源的 field(s)
  replace        通過 filename 或者 stdin替換一個資源
  wait           Experimental: Wait for a specific condition on one or many resources.
  convert        在不同的 API versions 轉換配置檔案
  kustomize      Build a kustomization target from a directory or a remote url.
 
 
Settings Commands:
  label          更新在這個資源上的 labels
  annotate       更新一個資源的註解
  completion     Output shell completion code for the specified shell (bash or zsh)
 
 
Other Commands:
  api-resources  Print the supported API resources on the server
  api-versions   Print the supported API versions on the server, in the form of "group/version"
  config         修改 kubeconfig 檔案
  plugin         Provides utilities for interacting with plugins.
  version        輸出 client 和 server 的版本資訊
 
 
Usage:
  kubectl [flags] [options]
 
 
Use "kubectl 
 
<command> --help" for more information about a given command.
Use "kubectl options" for a list of global command-line options (applies to all commands).

那麼我希望能用kubectl Tab能補全命令需要怎麼做呢

# cd ~；echo "source <(kubectl completion bash)" >> .bashrc

# . <(kubectl completion bash)

一些實用命令

Q1：當kubectl get po 看到STATUS狀態不正常時怎麼查詢問題？

 [root@master-test ~]# kubectl describe pods nginx-test-97c58fcc-9ncz2

還可以，檢視日誌

[root@master-test ~]# kubectl logs etcd-master-test -n kube-system