Kubernetes学习笔记8

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 Service
  run           Run a particular image on the cluster
  set           Set specific features on objects

Basic Commands (Intermediate):
  explain       Documentation of resources
  get           Display one or many resources
  edit          Edit a resource on the server
  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     Auto-scale a Deployment, ReplicaSet, StatefulSet, or
ReplicationController

Cluster Management Commands:
  certificate   Modify certificate resources.
  cluster-info  Display cluster info
  top           Display Resource (CPU/Memory) usage.
  cordon        Mark node as unschedulable
  uncordon      Mark node as schedulable
  drain         Drain node in preparation for maintenance
  taint         Update the taints on one or more nodes

Troubleshooting and Debugging Commands:
  describe      Show details of a specific resource or group of resources
  logs          Print the logs for a container in a pod
  attach        Attach to a running container
  exec          Execute a command in a container
  port-forward  Forward one or more local ports to a pod
  proxy         Run a proxy to the Kubernetes API server
  cp            Copy files and directories to and from containers.
  auth          Inspect authorization
  debug         Create debugging sessions for troubleshooting workloads and
nodes

Advanced Commands:
  diff          Diff live version against would-be applied version
  apply         Apply a configuration to a resource by filename or stdin
  patch         Update field(s) of a resource
  replace       Replace a resource by filename or stdin
  wait          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 resource
  annotate      Update the annotations on a resource
  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        Modify kubeconfig files
  plugin        Provides utilities for interacting with plugins.
  version       Print the client and server version information

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).

kubectl子命令使用分类：