我厌倦了一遍又一遍地输入这个，所以我写了一个简单的bash实用程序来切换上下文

你可以在这里找到它https://github.com/josefkorbel/kube-switch

切换/读取/操作不同的kubernetes环境(又名kubernetes上下文)的标准答案是，正如Mark提到的，使用kubectl配置，如下所示:

$ kubectl config                                                                                                                                                                                                                 
Modify kubeconfig files using subcommands like "kubectl config set current-context my-context"

Available Commands:
  current-context Displays the current-context
  delete-cluster  Delete the specified cluster from the kubeconfig
  delete-context  Delete the specified context from the kubeconfig
  get-clusters    Display clusters defined in the kubeconfig
  get-contexts    Describe one or many contexts
  rename-context  Renames a context from the kubeconfig file.
  set             Sets an individual value in a kubeconfig file
  set-cluster     Sets a cluster entry in kubeconfig
  set-context     Sets a context entry in kubeconfig
  set-credentials Sets a user entry in kubeconfig
  unset           Unsets an individual value in a kubeconfig file
  use-context     Sets the current-context in a kubeconfig file
  view            Display merged kubeconfig settings or a specified kubeconfig file

Usage:
  kubectl config SUBCOMMAND [options]

在这个场景的背后，有一个~/。kube/config YAML文件，用于存储所有可用上下文及其对应的凭据和每个上下文的端点。

你可能已经知道，现成的Kubectl并不容易管理不同的kubernetes上下文。与其使用自己的脚本来管理所有这些，更好的方法是使用名为kubectx的成熟工具，该工具由Kubernetes /谷歌云平台开发人员体验团队的“Ahmet Alp Balkan”创建。我强烈推荐它。

https://github.com/ahmetb/kubectx

$ kctx --help                                                                                                                                                                                                                  
USAGE:
  kubectx                       : list the contexts
  kubectx <NAME>                : switch to context <NAME>
  kubectx -                     : switch to the previous context
  kubectx <NEW_NAME>=<NAME>     : rename context <NAME> to <NEW_NAME>
  kubectx <NEW_NAME>=.          : rename current-context to <NEW_NAME>
  kubectx -d <NAME> [<NAME...>] : delete context <NAME> ('.' for current-context)
                                  (this command won't delete the user/cluster entry
                                  that is used by the context)

  kubectx -h,--help         : show this message

如果你正在寻找一种在不同上下文之间切换的简单方法，也许这将会有所帮助。

我从前面提到的kubectx和kswitch脚本中得到了灵感，我可以将它们推荐给大多数用例。它们帮助解决切换任务，但在~/.kube/config的一些更大或更少的标准配置上对我造成了破坏。所以我创建了一个sys-exec调用包装器和一个kubectl的简写。

如果你不带参数地调用k，你会看到一个被拦截的切换上下文的提示。

Switch kubectl to a different context/cluster/namespace.
Found following options to select from:
 >>> context: [1] franz
 >>> context: [2] gke_foo_us-central1-a_live-v1
 >>> context: [3] minikube
 --> new num [?/q]:

更进一步，k继续作为一个简写。以下是等价的:

kubectl get pods --all-namespaces
k get pods -A
k p -A

如果你正在寻找一个基于gui的Mac解决方案，并且已经安装了Docker桌面，你可以使用Docker菜单栏图标。在这里，你可以找到“Kubernetes”菜单，其中包含了你在kubecconfig中拥有的所有上下文，并且可以轻松地在它们之间切换。

请查看最新的(docker 19.03) docker context命令。

Ajeet Singh Raina)在“Docker 19.03.0预发布版:快速上下文切换，无根Docker, Sysctl对Swarm服务的支持”中阐述了这一点。

A context is essentially the configuration that you use to access a particular cluster. Say, for example, in my particular case, I have 4 different clusters – mix of Swarm and Kubernetes running locally and remotely. Assume that I have a default cluster running on my Desktop machine , 2 node Swarm Cluster running on Google Cloud Platform, 5-Node Cluster running on Play with Docker playground and a single-node Kubernetes cluster running on Minikube and that I need to access pretty regularly. Using docker context CLI I can easily switch from one cluster(which could be my development cluster) to test to production cluster in seconds.

$ sudo docker context --help
Usage:  docker context COMMAND
Manage contexts
Commands:
  create      Create a context
  export      Export a context to a tar or kubeconfig file
  import      Import a context from a tar file
  inspect     Display detailed information on one or more contexts
  ls          List contexts
  rm          Remove one or more contexts
  update      Update a context
  use         Set the current docker context
Run 'docker context COMMAND --help' for more information on a command.

例如:

[:)Captain'sBay=>sudo docker context ls . 名称描述docker端点kubernetes端点编排器 unix:///var/run/docker. xmlSock https://127.0.0.1:16443(默认)swarm swarm-context1

了解所有的背景

C:\Users\arun>kubectl config get-contexts

获取当前上下文

C:\Users\arun>kubectl config current-context

切换上下文

C:\Users\arun>kubectl config use-context <any context name from above list>