使用kubecm管理kubeconfig

kubecm是国内某位大神自己写的项目，可以合并多个kubeconfig文件，切换集群等。项目地址。如果你是用的bash环境，需要安装至少0.8.2版本（之前版本在bash环境下无法命令补全，联系作者修复后的版本为0.8.2）。

此文档环境： centos7.6 、kubectl1.14.8、kubecm0.8.2

kubecm

kubecm 由 golang 编写，支持 Mac Linux 和 windows 平台，delete rename switch 提供比较实用的交互式的操作，目前的功能包括：

• add ：添加新的 kubeconfig 到 $HOME/.kube/config 中
• completion ：命令行自动补全功能
• delete：删除已有的 context ，提供交互式和指定删除两种方式
• merge：将指定目录中的 kubeconfig 合并为一个 kubeconfig 文件
• rename：重名指定的 context，提供交互式和指定重命名两种方式
• switch：交互式切换 context

kubeconfig文件结构

kubeconfig 文件主要由下面几部分构成： 集群参数、用户参数、上下文参数、当前上下文

apiVersion: v1
clusters: #集群参数
- cluster:
    certificate-authority-data: 
    server: https://172.16.xx.xx:6443
  name: cluster1
contexts: #上下文参数
- context:
    cluster: cluster1
    user: admin
  name: context-cluster1-admin #集群上下文名称
current-context: context-cluster1-admin # 当前上下文
kind: Config
preferences: {}
users: #用户参数
- name: admin
  user:
    client-certificate-data: 
    client-key-data: 

kubecm安装

$ wget https://github.com/sunny0826/kubecm/releases/download/v0.8.2/kubecm_0.8.2_Linux_x86_64.tar.gz
$ tar -zxvf kubecm_0.8.2_Linux_x86_64.tar.gz
$ mv kubecm /usr/local/bin/

命令行自动补全

bash

$ source <(kubecm completion bash)
$ echo "source <(kubecm completion bash)" >> ~/.bashrc
$ source  ~/.bashrc

zsh

$ source <(kubecm completion zsh)
$ echo "source <(kubecm completion zsh)" >> ~/.zshrc
$ source  ~/.zshrc

kubecm使用

查看

# 查看 $HOME/.kube/config 中所有的 context
$ +------------+---------------------------+-------------+----------+--------------+
|   CURRENT  |            NAME           |   CLUSTER   |   USER   |   Namespace  |
+============+===========================+=============+==========+==============+
|      *     |   context-cluster1-admin  |   cluster1  |   admin  |              |
+------------+---------------------------+-------------+----------+--------------+
...

添加

# 添加 example.yaml(也可以直接用config文件) 到 $HOME/.kube/config.yaml，该方式不会覆盖源 kubeconfig，只会在当前目录中生成一个 config.yaml 文件
# 我这里没用.yaml文件。直接用的config文件
$ ls
all_config  config-aliyun
$ kubecm add -f config-aliyun
generate ./config.yaml
$ ls
all_config  config-aliyun  config.yaml


# 功能同上，但是会将 example.yaml 中的 context 命名为 test
$ kubecm add -f config-aliyun -n test
generate ./config.yaml


# 添加 -c 会覆盖源 kubeconfig
$ kubecm add -f config-aliyun -c
「config-aliyun」 add successful!
+------------+---------------------------+-----------------------+--------------------+--------------+
|   CURRENT  |            NAME           |        CLUSTER        |        USER        |   Namespace  |
+============+===========================+=======================+====================+==============+
|            |       config-aliyun       |   cluster-bh6mb7k26h  |   user-bh6mb7k26h  |              |
+------------+---------------------------+-----------------------+--------------------+--------------+
|      *     |   context-cluster1-admin  |        cluster1       |        admin       |              |
+------------+---------------------------+-----------------------+--------------------+--------------+

删除

# 交互式删除
$ kubecm delete
Use the arrow keys to navigate: ↓ ↑ → ←  and / toggles search
Select The Delete Kube Context
  ???? context-cluster1-admin(*)
    config-aliyun
    <Exit>

--------- Info ----------
Name:           context-cluster1-admin
Cluster:        cluster1
User:           admin

# 删除指定context
$  kubecm delete config-aliyun
Context Delete:「config-aliyun」

合并

# 合并 all_config 目录中的 kubeconfig,该方式不会覆盖源 kubeconfig，只会在当前目录中生成一个 config.yaml 文件
$ kubecm merge -f all_config/
Loading kubeconfig file: [all_config//config-154 all_config//config-202]
Context Add: config-154
Context Add: config-202
# 添加 -c 会覆盖源 kubeconfig
$ kubecm merge -f all_config/ -c
Loading kubeconfig file: [all_config//config-154 all_config//config-202]
Context Add: config-154
Context Add: config-202

$ kubecm
+------------+---------------+-----------------------+--------------------+--------------+
|   CURRENT  |      NAME     |        CLUSTER        |        USER        |   Namespace  |
+============+===============+=======================+====================+==============+
|            |   config-154  |   cluster-8ft42c2chh  |   user-8ft42c2chh  |              |
+------------+---------------+-----------------------+--------------------+--------------+
|      *     |   config-202  |   cluster-h55g4kbd78  |   user-h55g4kbd78  |              |
+------------+---------------+-----------------------+--------------------+--------------+
...

重命名

# 交互式重命名
$ kubecm rename
???? Select:config-202
Rename: congig-202-1█
+------------+-----------------+-----------------------+--------------------+--------------+
|   CURRENT  |       NAME      |        CLUSTER        |        USER        |   Namespace  |
+============+=================+=======================+====================+==============+
|      *     |   congig-202-1  |   cluster-h55g4kbd78  |   user-h55g4kbd78  |              |
+------------+-----------------+-----------------------+--------------------+--------------+
|            |    config-154   |   cluster-8ft42c2chh  |   user-8ft42c2chh  |              |
+------------+-----------------+-----------------------+--------------------+--------------+

# 将 congig-202-1 重命名为 test
$ kubecm rename -o congig-202-1 -n test
+------------+---------------+-----------------------+--------------------+--------------+
|   CURRENT  |      NAME     |        CLUSTER        |        USER        |   Namespace  |
+============+===============+=======================+====================+==============+
|            |   config-154  |   cluster-8ft42c2chh  |   user-8ft42c2chh  |              |
+------------+---------------+-----------------------+--------------------+--------------+
|      *     |      test     |   cluster-h55g4kbd78  |   user-h55g4kbd78  |              |
+------------+---------------+-----------------------+--------------------+--------------+
# 重命名当前current-context 为 dev
$ kubecm rename -n dev -c
Rename test to dev
+------------+---------------+-----------------------+--------------------+--------------+
|   CURRENT  |      NAME     |        CLUSTER        |        USER        |   Namespace  |
+============+===============+=======================+====================+==============+
|            |   config-154  |   cluster-8ft42c2chh  |   user-8ft42c2chh  |              |
+------------+---------------+-----------------------+--------------------+--------------+
|      *     |      dev      |   cluster-h55g4kbd78  |   user-h55g4kbd78  |              |
+------------+---------------+-----------------------+--------------------+--------------+

切换

# 集群切换
$ kubecm switch
Use the arrow keys to navigate: ↓ ↑ → ←  and / toggles search
Select Kube Context
  ???? config-154(*)
    dev
    <Exit>

--------- Info ----------
Name:           config-154
Cluster:        cluster-8ft42c2chh
User:           user-8ft42c2chh

# 切换命名空间
$ kubecm ns
Use the arrow keys to navigate: ↓ ↑ → ←  and / toggles search
Select Namespace:
↑ ????  default *
   demo
   dev
↓  exdns

参考链接

github

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