K9s:基于命令行终端UI的管理工具

写在前面

• K9s是一个基于终端UI的 K8S 管理工具，功能比kubebox更炫酷一点
• 博文内容为k9s在 windows、Linux 以及docker 安装Demo
• 简单的 热键使用。
• 理解不足小伙伴帮忙指正

「我所渴求的，無非是將心中脫穎語出的本性付諸生活，為何竟如此艱難呢 ------赫尔曼·黑塞《德米安》」

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K9s是一个基于终端的管理Kubernetes集群的工具，旨在简化Kubernetes集群管理。和kubebox有些类似， K9s 同样可以持续监控集群的变化，并且可以提供与集群资源交互的快捷命令。如果说管理集群受限，只有一个 终端你可以使用，那么k9s是一个不错的选择.

K9s有一些特殊功能，可以显示 Kubernetes 资源之间依赖关系的xray、显示集群高级状态的pulse，以及扫描和报告已部署资源和配置问题的popeye。

安装下载

window 客户端安装

PSC:\ProgramFiles>chocoinstallk9s
Chocolateyv1.1.0
Installingthefollowingpackages:
k9s
Byinstalling,youacceptlicensesforthepackages.
Progress:Downloadingkubernetes-cli1.26.0...100%
Progress:Downloadingk9s0.26.7...100%

kubernetes-cliv1.26.0[Approved]
kubernetes-clipackagefilesinstallcompleted.Performingotherinstallationsteps.
Thepackagekubernetes-cliwantstorun'chocolateyInstall.ps1'.
Note:Ifyoudon'trunthisscript,theinstallationwillfail.
Note:Toconfirmautomaticallynexttime,use'-y'orconsider:
chocofeatureenable-nallowGlobalConfirmation
Doyouwanttorunthescript?([Y]es/[A]ll-yestoall/[N]o/[P]rint):all

Extracting64-bitC:\ProgramData\chocolatey\lib\kubernetes-cli\tools\kubernetes-client-windows-amd64.tar.gztoC:\ProgramData\chocolatey\lib\kubernetes-cli\tools...
C:\ProgramData\chocolatey\lib\kubernetes-cli\tools
Extracting64-bitC:\ProgramData\chocolatey\lib\kubernetes-cli\tools\kubernetes-client-windows-amd64.tartoC:\ProgramData\chocolatey\lib\kubernetes-cli\tools...
C:\ProgramData\chocolatey\lib\kubernetes-cli\tools
ShimGenhassuccessfullycreatedashimforkubectl-convert.exe
ShimGenhassuccessfullycreatedashimforkubectl.exe
Theinstallofkubernetes-cliwassuccessful.
Softwareinstalledto'C:\ProgramData\chocolatey\lib\kubernetes-cli\tools'

k9sv0.26.7[Approved]
k9spackagefilesinstallcompleted.Performingotherinstallationsteps.
Extracting64-bitC:\ProgramData\chocolatey\lib\k9s\tools\k9s_Windows_x86_64.tar.gztoC:\ProgramData\chocolatey\lib\k9s\tools...
C:\ProgramData\chocolatey\lib\k9s\tools
Extracting64-bitC:\ProgramData\chocolatey\lib\k9s\tools\k9s_Windows_x86_64.tartoC:\ProgramData\chocolatey\lib\k9s\tools...
C:\ProgramData\chocolatey\lib\k9s\tools
ShimGenhassuccessfullycreatedashimfork9s.exe
Theinstallofk9swassuccessful.
Softwareinstalledto'C:\ProgramData\chocolatey\lib\k9s\tools'

Chocolateyinstalled2/2packages.
Seethelogfordetails(C:\ProgramData\chocolatey\logs\chocolatey.log).
PSC:\ProgramFiles>

下载之后，需要准备好kubeconfig文件，放到默认加载的位置

PSC:\Users\山河已无恙\.kube>ls


目录:C:\Users\山河已无恙\.kube


ModeLastWriteTimeLengthName
---------------------------
d-----2023/1/147:48cache
-a----2023/1/1410:195682config
PSC:\Users\山河已无恙\.kube>cat.\config
apiVersion:v1
clusters:
-cluster:
certificate-authority-data:
.......................

通过命令行启动

PSC:\ProgramData\chocolatey\lib\k9s\tools>.\k9s.exe

Linux 客户端安装

下载安装包

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k9s]
└─$curl-sShttps://webinstall.dev/k9s|bash

Thanksforusingwebitoinstall'k9s@stable'on'Linux/x86_64'.
Haveaproblem?Experienceabug?Pleaseletusknow:
https://github.com/webinstall/webi-installers/issues

Lovin'it?SaythankswithaStaronGitHub:
https://github.com/webinstall/webi-installers

Downloadingk9sfrom
https://github.com/derailed/k9s/releases/download/v0.26.7/k9s_Linux_x86_64.tar.gz
failedtodownloadfromhttps://github.com/derailed/k9s/releases/download/v0.26.7/k9s_Linux_x86_64.tar.gz

解压直接运行

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k9s]
└─$tar-zxvfk9s_Linux_x86_64.tar.gz
LICENSE
README.md
k9s
┌──[root@vms81.liruilongs.github.io]-[~/ansible/k9s]
└─$ls
k9sk9s_Linux_x86_64.tar.gzLICENSEREADME.md
┌──[root@vms81.liruilongs.github.io]-[~/ansible/k9s]
└─$./k9s

查看当前集群资源的统计信息。

docker 安装

也可以通过docker 直接运行

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k9s]
└─$dockerrun--rm-it-v~/.kube/config:/root/.kube/configdocker.io/derailed/k9s

查看资源状态信息

查看资源依赖关系

热键

ActionCommandCommentShow active keyboard mnemonics and help?
Show all available resource aliasctrl-a
To bail out of K9s:q,ctrl-c
View a Kubernetes resource using singular/plural or short-name:po⏎accepts singular, plural, short-name or alias ie pod or podsView a Kubernetes resource in a given namespace:alias namespace⏎
Filter out a resource view given a filter/filter⏎Regex2 supported ie `fredInverse regex filter/! filter⏎Keep everything thatdoesn'tmatch.Filter resource view by labels/-l label-selector⏎
Fuzzy find a resource given a filter/-f filter⏎
Bails out of view/command/filter mode<esc>
Key mapping to describe, view, edit, view logs,...d,v,e,l,...
To view and switch to another Kubernetes context:ctx⏎
To view and switch to another Kubernetes context:ctx context-name⏎
To view and switch to another Kubernetes namespace:ns⏎
To view all saved resources:screendump or sd⏎
To delete a resource (TAB and ENTER to confirm)ctrl-d
To kill a resource (no confirmation dialog!)ctrl-k
Launch pulses view:pulses or pu⏎
Launch XRay view:xray RESOURCE [NAMESPACE]⏎RESOURCE can be one of po, svc, dp, rs, sts, ds, NAMESPACE is optionalLaunch Popeye view:popeye or pop⏎Seepopeye

博文参考

https://github.com/derailed/k9s

https://k9scli.io