五分钟带你玩转k8s（二）操作必备命令

k8s操作必备命令 掌握以下命令 就可以初步掌握了k8s

kubectl get pods --all-namespaces 获取所有命名空间
kubectl delete namespaces kubernetes-dashboard 删除命名空间
kubectl get clusterrolebinding  获取clusterrolebinding用户（角色与用户的绑定关系）
kubectl delete clusterrolebinding dashboard-admin 删除binding
kubectl delete clusterrole            删除角色
kubectl get nodes -o yaml  获取nodes详细信息
sudo kubectl logs kubernetes-dashboard-6dccb458d5-x7xft --namespace=kubernetes-dashboard 
 
 
systemctl status kubelet 查看kubelet状态
systemctl start kubelet  启动kubelet 
systemctl daemon-reload && systemctl restart kubelet 重启kubelet
systemctl daemon-reload && systemctl stop kubelet  停止kubelet
journalctl -f -u kubelet.service/journalctl -xefu kubelet 查看kubelet日志
 
 
kubectl drain nodename --force --ignore-daemonsets --delete-local-data
kubectl delete node nodename //去除节点
 
 
 
kubectl create -f  xxx.yaml  #创建pods 或 services
kubectl delete -f xxx.yaml  #删除 pods 或 services
kubectl delete pods --all --grace-period=0 --force  # 删除所有的pods
kubectl get services  #查看应用被映射到节点的哪个端口
kubectl get pods   #查看当前pod
 
 
//k8s停机重启
swapoff -a 
systemctl start kubelet
//master主机root用户需要执行（node不需要执行）
export KUBECONFIG=/etc/kubernetes/admin.conf
非root用户需要执行
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config