kubectl commands

安装

https://kubernetes.io/zh-cn/docs/tasks/tools/install-kubectl-linux/

kubectl 版本和集群版本之间的差异必须在一个小版本号内。 例如：v1.28 版本的客户端能与 v1.27、 v1.28 和 v1.29 版本的控制面通信。 用最新兼容版的 kubectl 有助于避免不可预见的问题。

shell 自动补全

bash-completion

apt-get install bash-completion 
或 
yum install bash-completion

Bash、Fish 和 Zsh

echo $SHELL  

echo 'source <(kubectl completion bash)' >>~/.bashrc

中控机

commands

https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#logs

crd

❯ kubectl get crd | grep traefik.containo.us | awk '{print $1}'
ingressroutes.traefik.containo.us
ingressroutetcps.traefik.containo.us
ingressrouteudps.traefik.containo.us
middlewares.traefik.containo.us
middlewaretcps.traefik.containo.us

$ kubectl delete customresourcedefinition `kubectl get crd | grep traefik.containo.us | awk '{print $1}'| tr '\n' ' '`

pod

重启

kubernetes-dashboard   kubernetes-dashboard-6495566f7b-9p5mq         0/1     ImagePullBackOff   0              9m43s
❯ kubectl rollout  restart  kubernetes-dashboard-6495566f7b-9p5mq -n kubernetes-dashboard
error: the server doesn't have a resource type "kubernetes-dashboard-6495566f7b-9p5mq"
❯ kubectl rollout  restart deployment/kubernetes-dashboard -n kubernetes-dashboard
deployment.apps/kubernetes-dashboard restarted

rollout restart

logs

tail

❯ kubectl logs --tail=10 kubernetes-dashboard-6495566f7b-9p5mq -n kubernetes-dashboard

since

过去时间写入日志

❯ kubectl logs --since=23h09m pod/traefik-7d7459bcdc-swkl5

{“level”:”warning”,”msg”:”Error checking new version: Get "https://update.traefik.io/repos/traefik/traefik/releases\": dial tcp: lookup update.traefik.io on 10.96.1.10:53: server misbehaving”,”time”:”2023-10-16T00:11:12Z”}

since-time

指定日期的日志

❯ kubectl logs --since-time=2023-10-16T00:11:00Z pod/traefik-7d7459bcdc-swkl5

{“level”:”warning”,”msg”:”Error checking new version: Get "https://update.traefik.io/repos/traefik/traefik/releases\": dial tcp: lookup update.traefik.io on 10.96.1.10:53: server misbehaving”,”time”:”2023-10-16T00:11:12Z”}

krew

https://krew.sigs.k8s.io/docs/user-guide/setup/install/

把export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"添加到环境变量.bashrc或.zshrc

网不好，使用代理

https://github.com/521xueweihan/GitHub520 hosts文件

https://ghproxy.com

#v0.4.4
❯ wget https://ghproxy.com/https://github.com/kubernetes-sigs/krew/releases/download/v0.4.4/krew-linux_amd64.tar.gz
❯ ./krew-linux_amd64 install krew
#卡住
❯ cd  ~.krew/index
❯ git clone https://ghproxy.com/https://github.com/kubernetes-sigs/krew-index.git default
#./krew-linux_amd64 install krew
❯ ./krew-linux_amd64 install --manifest=krew.yaml --archive=krew-linux_amd64.tar.gz

验证

❯ kubectl krew
krew is the kubectl plugin manager.
。。。。
❯ kubectl plugin list
The following compatible plugins are available:

/home/cs/.local/custom/kubectl/kubectl-hello
/home/cs/.krew/bin/kubectl-krew

本地安装插件

kubectl krew install --manifest=xx.yaml --archive=kubectl-xx_linux_amd64.zip
kubectl xx
kubectl krew uninstall xx

https://krew.sigs.k8s.io/docs/developer-guide/custom-indexes/