「Krew」- 管理 kubectl 插件

# kubectl krew upgrade // 升级全部插件

# kubectl krew upgrade cert-manager
Updated the local copy of plugin index.
Upgrading plugin: cert-manager
F0917 01:22:06.322701  391258 root.go:79] failed to upgrade plugin "cert-manager": can't upgrade, the newest version is already installed

# wget https://github.com/kubernetes-sigs/krew/releases/latest/download/krew.tar.gz
...

# tar zxvf krew.tar.gz
./LICENSE
./krew-darwin_amd64
./krew-darwin_arm64
./krew-linux_amd64
./krew-linux_arm
./krew-linux_arm64
./krew-windows_amd64.exe

# ./krew-linux_amd64 install krew
WARNING: To be able to run kubectl plugins, you need to add
the following to your ~/.bash_profile or ~/.bashrc:

    export PATH="${PATH}:${HOME}/.krew/bin"

and restart your shell.
...

# echo 'export PATH="${PATH}:${HOME}/.krew/bin"' >> ~/.bashrc
# source ~/.bashrc

# kubectl krew help
krew is the kubectl plugin manager.
You can invoke krew through kubectl: "kubectl krew [command]..."
...

// -------------------------------------------------------- // 搜索插件

# kubectl krew search cert-manager
NAME          DESCRIPTION                                        INSTALLED
cert-manager  Manage cert-manager resources inside your cluster  no

// -------------------------------------------------------- // 安装插件

// 在安装插件的最后步骤中，极会因为网络原因而导致下载失败
// 此时只能求助于手动安装，或者网络加速（配置环境变量即可）

# kubectl krew install cert-manager
Updated the local copy of plugin index.
Installing plugin: cert-manager
Installed plugin: cert-manager
\
 | Use this plugin:
 |      kubectl cert-manager
 | Documentation:
 |      https://github.com/jetstack/cert-manager
/