为kubectl增加插件

先下载配置文件和相应的tar包，并对tar包解压，释放出可执行文件：

wget https://storage.googleapis.com/krew/v0.2.1/krew.tar.gz
wget https://storage.googleapis.com/krew/v0.2.1/krew.yaml
tar -zxvf krew.tar.gz

# wget https://storage.googleapis.com/krew/v0.2.1/krew.tar.gz

--2020-01-13 08:34:35--  https://storage.googleapis.com/krew/v0.2.1/krew.tar.gz

Resolving storage.googleapis.com (storage.googleapis.com)… 172.217.164.112, 2607:f8b0:4005:807::2010

Connecting to storage.googleapis.com (storage.googleapis.com)|172.217.164.112|:443… connected.

HTTP request sent, awaiting response… 200 OK

Length: 14375157 (14M) [application/x-tar]

Saving to: ‘krew.tar.gz’

100%[=====================================================>] 14,375,157  42.9MB/s   in 0.3s
2020-01-13 08:34:36 (42.9 MB/s) - ‘krew.tar.gz’ saved [14375157/14375157]

# wget https://storage.googleapis.com/krew/v0.2.1/krew.yaml

--2020-01-13 08:34:36--  https://storage.googleapis.com/krew/v0.2.1/krew.yaml

Resolving storage.googleapis.com (storage.googleapis.com)… 172.217.164.112, 2607:f8b0:4005:807::2010

Connecting to storage.googleapis.com (storage.googleapis.com)|172.217.164.112|:443… connected.

HTTP request sent, awaiting response… 200 OK

Length: 2442 (2.4K) [application/octet-stream]

Saving to: ‘krew.yaml’

100%[=====================================================>] 2,442       --.-K/s   in 0s
2020-01-13 08:34:36 (37.2 MB/s) - ‘krew.yaml’ saved [2442/2442]

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

# ls
krew-darwin_amd64  krew-linux_arm  krew-windows_amd64.exe
krew-linux_amd64   krew.tar.gz     krew.yaml

./krew-linux_amd64 install --manifest=krew.yaml --archive=krew.tar.gz

Installing plugin: krew

CAVEATS:

\

 |  krew is now installed! To start using kubectl plugins, you need to add

 |  krew's installation directory to your PATH:

 |

 |    * macOS/Linux:

 |      - Add the following to your ~/.bashrc or ~/.zshrc:

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

 |      - Restart your shell.

 |

 |    * Windows: Add %USERPROFILE%.krew\bin to your PATH environment variable

 |

 |  Run "kubectl krew" to list krew commands and get help.

 |  You can find documentation at https://github.com/GoogleContainerTools/krew.

/

Installed plugin: krew

修改 ~/.bash_profile

vim .bash_profile
增加一行：
PATH=$PATH:$HOME/bin:$HOME/.krew/bin
保存后执行：
source .bash_profile

示例，安装一个tree插件：

# kubectl krew install tree
Updated the local copy of plugin index.
 Installing plugin: tree
 CAVEATS:
 \
  |  * For resources that are not in default namespace, currently you must
  |    specify -n/--namespace explicitly (the current namespace setting is not
  |    yet used).
 /
 Installed plugin: tree

[root@xxxx ~]# kubectl tree deployment zzzz -n yyyy
 NAMESPACE   NAME                                READY  REASON  AGE
 yyyy  Deployment/zzzz                  -              4d14h
 yyyy  └─ReplicaSet/zzzz-58dc7468d7   -              4d14h
 yyyy    └─Pod/zzzz-58dc7468d7-nzkbh  True           3h45m