3.2.27. kubectl config¶

Usage:

$ kubectl config SUBCOMMAND [options]

$ kubectl config set-context NAME [--cluster=cluster_nickname] [--user=user_nickname] [--namespace=namespace] [options]

kubeconfig文件:

目录: ~/.kube/config
由4部分组成:
1. 集群列表
2. 用户列表
3. 上下文列表
4. 当前上下文名称

实例:

# 获取当前上下文
$ kubectl config current-context
# 列出集群
$ kubectl config get-clusters
# 列出上下文
$ kubectl config get-contexts
$ kubectl config view

# 添加/修改一个集群(本质是修改~/.kube/config文件内容)
$ kubectl config set-cluster <clusterName> --server=https://k8s.example.com:6443 --certificate-authority=<path/to/cafile>

# 添加/修改用户凭据
1. 使用用户名、密码
$ kubectl config set-credentials <name> --username=<userName> --password=<pwd>
2. 使用token
$ kubectl config set-credentials <name> --token=<token>

# 切换上下文
$ kubectl config use-context <contextName>

# 切换namespace(可设置别名 alias kcd=`xxxx`)
$ kubectl config set-context $(kubectl config current-context) --namespace <nsName>
$ kubectl config set-context minikube --namespace=<nsName>

# 创建上下文并将集群和用户凭据联系到一起
$ kubectl config set-context --cluster<clusterName> --user=<userName> --namespace=<nsName>

# 删除上下文
$ kubectl config delete-context <contextName>
# 删除集群
$ kubectl config delete-cluster <clusterName>

SUBCOMMAND:

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