k8s基础知识

Namespace命名规范：
命名空间名称满足正则表达式a-z0-9?,最大长度为63位

kubeadm init初始化集群后，kubectl get nodes报错：

Unable to connect to the server: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "kubernetes")

执行以下命令即可：

export KUBECONFIG=/etc/kubernetes/kubelet.conf

参考issue：https://github.com/kubernetes/kubernetes/issues/48378

image.png