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4、kubectl插件管理器Krew安装与使用 ​

实战：kubectl 插件管理器 Krew 安装与使用-2023.3.3(测试成功) ​

image-20230303140335996

目录 ​

[toc]

实验环境 ​

bash
实验环境：1、win10,vmwrokstation虚机；2、k8s集群：3台centos7.61810虚机，1个master节点,2个node节点k8sversion：v1.22.2containerd:v1.5.5

实验软件 ​

链接：https:-rw-r--r--1rootroot4.0MMar222:31krew-linux_amd64.tar.gz[root@master1 ~]#tar tf krew-linux_amd64.tar.gz ./LICENSE./krew-linux_amd64#步骤1：解压[root@master1 ~]#tar xf krew-linux_amd64.tar.gz [root@master1 ~]#ll krew-linux_amd64-rwxr-xr-x1100112111836580Jan12000krew-linux_amd64#步骤2：移动[root@master1 ~]#mv krew-linux_amd64 /usr/bin/krew[root@master1 ~]#ll /usr/bin/krew -rwxr-xr-x1100112111836580Jan12000/usr/bin/krew#步骤3：添加环境变量[root@master1 ~]#vim .bashrcexportPATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"#追加这一行[root@master1 ~]#source .bashrc

bash
#验证[root@master1 ~]#krew --helpkrewisthekubectlpluginmanager.Youcaninvokekrewthroughkubectl:"kubectl krew [command]..."Usage:kubectlkrew[command]AvailableCommands:completiongeneratetheautocompletionscriptforthespecifiedshellhelpHelpaboutanycommandindexManagecustompluginindexesinfoShowinformationaboutanavailableplugininstallInstallkubectlpluginslistListinstalledkubectlpluginssearchDiscoverkubectlpluginsuninstallUninstallpluginsupdateUpdatethelocalcopyofthepluginindexupgradeUpgradeinstalledpluginstonewerversionsversionShowkrewversionanddiagnosticsFlags:-h,--helphelpforkrew-v,--vLevelnumberfortheloglevelverbosityUse"kubectl krew [command] --help"formoreinformationaboutacommand.[root@master1 ~]#krew versionOPTIONVALUEGitTagv0.4.3GitCommitdbfefa5IndexURIhttps:BasePath/root/.krewIndexPath/root/.krew/index/defaultInstallPath/root/.krew/storeBinPath/root/.krew/binDetectedPlatformlinux/amd64[root@master1 ~]#

方法2：安装krew软件(官方脚本) ​

  • 安装软件（官方安装命令）

https:set-x;cd"$(mktemp-d)"&&OS="$(uname|tr'[:upper:]''[:lower:]')"&&ARCH="$(uname-m|sed-e's/x86_64/amd64/'-e's/\(arm\)\(64\)\?.*/\1\2/'-e's/aarch64$/arm64/')"&&KREW="krew-${OS}_${ARCH}"&&curl-fsSLO"https:tarzxvf"${KREW}.tar.gz"&&./"${KREW}"installkrew)

（1）步骤1：安装git

注意：这里是需要安装git的。

bash
yuminstall-ygit

（2）执行脚本命令

bash
(set-x;cd"$(mktemp-d)"&&OS="$(uname|tr'[:upper:]''[:lower:]')"&&ARCH="$(uname-m|sed-e's/x86_64/amd64/'-e's/\(arm\)\(64\)\?.*/\1\2/'-e's/aarch64$/arm64/')"&&KREW="krew-${OS}_${ARCH}"&&curl-fsSLO"https:tarzxvf"${KREW}.tar.gz"&&./"${KREW}"installkrew)

（3）添加环境变量

bash
[root@master1 ~]#vim .bashrcexportPATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"#追加这一行[root@master1 ~]#source .bashrc

（4）验证

bash
#验证[root@master1 ~]#krew --helpkrewisthekubectlpluginmanager.Youcaninvokekrewthroughkubectl:"kubectl krew [command]..."Usage:kubectlkrew[command]AvailableCommands:completiongeneratetheautocompletionscriptforthespecifiedshellhelpHelpaboutanycommandindexManagecustompluginindexesinfoShowinformationaboutanavailableplugininstallInstallkubectlpluginslistListinstalledkubectlpluginssearchDiscoverkubectlpluginsuninstallUninstallpluginsupdateUpdatethelocalcopyofthepluginindexupgradeUpgradeinstalledpluginstonewerversionsversionShowkrewversionanddiagnosticsFlags:-h,--helphelpforkrew-v,--vLevelnumberfortheloglevelverbosityUse"kubectl krew [command] --help"formoreinformationaboutacommand.[root@master1 ~]#krew versionOPTIONVALUEGitTagv0.4.3GitCommitdbfefa5IndexURIhttps:BasePath/root/.krewIndexPath/root/.krew/index/defaultInstallPath/root/.krew/storeBinPath/root/.krew/binDetectedPlatformlinux/amd64[root@master1 ~]#

2、使用kubectl-plugin ​

1.krew插件管理器使用案例 ​

Quickstart

Krew helps you discover and install kubectlpluginson your machine.

You can install and use a wide variety ofkubectlplugins to enhance your Kubernetes experience.

Let’s get started:

  1. Install and set upKrew on your machine.

  2. Download the plugin list:

    sh
    $kubectlkrewupdate

    这里有时会无法拉取的：（一会儿可以，一会儿不行，还是因为墙的问题……，可能会拉取github超时）

    image-20230303103046275

  3. Discover plugins available on Krew:

    sh
    $kubectlkrewsearchNAMEDESCRIPTIONINSTALLEDaccess-matrixShowanRBACaccessmatrixforserverresourcesnoadvise-pspSuggestsPodSecurityPoliciesforcluster.noauth-proxyAuthenticationproxytoapodorserviceno[...]

  4. Choose a plugin from the list and install it:

    sh
    $kubectlkrewinstallaccess-matrix

    这里也会有时拉取不下来的：

    image-20230303103506454

  5. Use the installed plugin:

    sh
    $kubectlaccess-matrix

  6. Keep your plugins up-to-date:

    sh
    $kubectlkrewupgrade

  7. Uninstall a plugin you no longer use:

    sh
    $kubectlkrewuninstallaccess-matrix

This is practically all you need to know to start using Krew.

注意：自己的pc是有连接vpn科学上网的，但是里面的虚机好像并不能正常使用这个vpn，因此这些无法被正常拉取下来的；

2.安装kubectl插件ingress-nginx​

注意：

bash
[root@master1 ~]#kubectl exec -it ingress-nginx-controller-c66bc7c5c-pj2h8 -n ingress-nginx -- cat /etc/nginx/nginx.conf……upstreamupstream_balancer{### Attention!!!## We no longer create "upstream"section for every backend.# Backends are handled dynamically using Lua. If you would like to debug# and see what backends ingress-nginx has in its memory you can# install our kubectl plugin https:# Once you have the plugin you can use "kubectl ingress-nginx backends"command to# inspect current backends.####server0.0.0.1;# placeholderbalancer_by_lua_block{balancer.balance()}keepalive320;keepalive_time1h;keepalive_timeout60s;keepalive_requests10000;}

引用 ​

CSDN博主「山河已无恙」文章：https:

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