11 Sep 2019 kubernetes命令tips

俊采

发布于 2023-10-17 10:44:32

1310

发布于 2023-10-17 10:44:32

文章被收录于专栏：LEo的网络日志

kubectl使用指定的配置文件

kubectl --kubeconfig /path/to/kubeconfig get no

进入pod中容器

kubectl exec -it  -n ns pod-name /bin/sh

kubectl apply -f .

设置KUBECONFIG

export KUBECONFIG=path/to/kubeconfig

删除所有po

kubectl delete po --all

查询所有ns下pod

kubectl get pods --all-namespaces

修改对象

kubectl edit deploy nginx-test

给节点增加/删除标签

kubectl label nodes node-name key=value
kubectl label nodes node-name key-

通过标签获取或者删除对象

oc -n acm-observability-china get clusterclaim.hive -l do-not-delete=true
oc -n acm-observability-china delete clusterclaim.hive -l do-not-delete=true

更换deploy的img

kubectl set image deployment/deployment_name container_name=img

查看详细的请求和响应信息

kubectl get pods --v=8

查看kubectl的http请求流程

kubectl get po -v 10

端口转发

kubectl port-forward grafana-test-6877dd694c-bp862 3001:3001
kubectl port-forward pod/minio-5cd8b89db8-rz2jk 9000:9000

删除ns

export NAMESPACE=devops
kubectl get namespace $NAMESPACE -o json > tmp.json
sed -i '/kubernetes/d' ./tmp.json
kubectl replace --raw "/api/v1/namespaces/$NAMESPACE/finalize" -f ./tmp.json

curl -k -H "Content-Type: application/json" -X PUT --data-binary @tmp.json https://api.soli-ocp44-acm.dev05.red-chesterfield.com/api/v1/namespaces/$NAMESPACE/finalize

oc patch -n open-cluster-management-observability project/open-cluster-management-observability --type=merge -p '{"metadata": {"finalizers":null}}'

强制删除pod

kubectl delete pod --grace-period=0 --force --namespace [NAMESPACE] [POD_NAME]

节点污点

kubectl taint nodes node1 key=value:NoSchedule
kubectl taint nodes node1 key:NoSchedule-

标记节点不调度

kubectl cordon $NODENAME

创建deployment

kubectl create deployment nginx --image=nginx

查看当前用户权限

kubectl auth can-i get po

使用本地代理转发请求到api server

oc proxy --port=8001
curl -X GET http://localhost:8001

登录到节点

oc debug node/worker001
chroot /host

切换namespace

kubectl config set-context --current --namespace=open-cluster-management-observability

修改object

kubectl -n acm-observability-china patch clusterpool obs-china-aws-4616 --patch '{"spec":{"size":3}}' --type=merge

获取指定字段

oc get route observatorium-api -o jsonpath="{.spec.host}"

获取secret的value

oc get secret client-cert -o jsonpath="{.data.tls\.key}" | base64 -d > tls.key

configmap替换换行符

k get cm prometheus-k8s-config -o json | jq '.data."prometheus.yaml"' -r

kubectl自动补齐

yum -y install bash-completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc

## mac
brew install bash
brew install bash-completion@2
chsh -s /usr/local/bin/bash