Kubernetes笔记（3）—— kubectl和cobra

kubectl是控制k8s clustet manager的命令行工具：

$ kubectl
kubectl controls the Kubernetes cluster manager.

Find more information at https://github.com/kubernetes/kubernetes.

Usage:
  kubectl [flags]
  kubectl [command]

Available Commands:
  get            Display one or many resources
  describe       Show details of a specific resource or group of resources
......

kubectl使用了cobra这个项目作为构建命令行的工具，它包含commands，args和flags的概念：

Commands represent actions, Args are things and Flags are modifiers for those actions.

The pattern to follow is APPNAME VERB NOUN --ADJECTIVE. or APPNAME COMMAND ARG --FLAG

举个例子：

$ kubectl get node --v=10

kubectl是appname，get是command，node是arg，--v=10是flag。