Kubernetes集群客户端工具kubectl

我们已经能够部署Kubernetes了，那么我们如何使用Kubernetes集群运行企业的应用程序呢？那么，我们就需要使用命令行工具kubectl。

学习目标：

了解kubectl 命令帮助方法

了解kubectl子命令使用分类

课程内容：

1、kubectl帮助方法：

我们预先是在所有节点上安装了kubectl工具。

# 检查kubectl是否安装：
[root@master1 ~]# rpm -qa |grep kubectl
kubectl-1.21.10-0.x86_64
[root@master1 ~]## 获取kubectl帮助方法：
[root@master1 ~]# 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        Take a replication controller, service, deployment or pod and
expose it as a new Kubernetes Servicerun           Run a particular image on the clusterset           Set specific features on objectsBasic Commands (Intermediate):explain       Documentation of resourcesget           Display one or many resourcesedit          Edit a resource on the serverdelete        Delete resources by filenames, stdin, resources and names, or by
resources and label selectorDeploy Commands:rollout       Manage the rollout of a resourcescale         Set a new size for a Deployment, ReplicaSet or Replication
Controllerautoscale     Auto-scale a Deployment, ReplicaSet, StatefulSet, or
ReplicationControllerCluster Management Commands:certificate   Modify certificate resources.cluster-info  Display cluster infotop           Display Resource (CPU/Memory) usage.cordon        Mark node as unschedulableuncordon      Mark node as schedulabledrain         Drain node in preparation for maintenancetaint         Update the taints on one or more nodesTroubleshooting and Debugging Commands:describe      Show details of a specific resource or group of resourceslogs          Print the logs for a container in a podattach        Attach to a running containerexec          Execute a command in a containerport-forward  Forward one or more local ports to a podproxy         Run a proxy to the Kubernetes API servercp            Copy files and directories to and from containers.auth          Inspect authorizationdebug         Create debugging sessions for troubleshooting workloads and
nodesAdvanced Commands:diff          Diff live version against would-be applied versionapply         Apply a configuration to a resource by filename or stdinpatch         Update field(s) of a resourcereplace       Replace a resource by filename or stdinwait          Experimental: Wait for a specific condition on one or many
resources.kustomize     Build a kustomization target from a directory or URL.Settings Commands:label         Update the labels on a resourceannotate      Update the annotations on a resourcecompletion    Output shell completion code for the specified shell (bash or
zsh)Other Commands:api-resources Print the supported API resources on the serverapi-versions  Print the supported API versions on the server, in the form of
"group/version"config        Modify kubeconfig filesplugin        Provides utilities for interacting with plugins.version       Print the client and server version informationUsage: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).

kubectl子命令使用分类：