使用kubecm管理kubeconfig
2020-08-21 本文已影响0人
杨家小七
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
