kubernetes错误Unable to connect to the server解决方法

1. 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")

    root@ubuntu:~# kubectl get svcUnable 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")root@ubuntu:~# rm -rf $HOME/.kuberoot@ubuntu:~#   mkdir -p $HOME/.kuberoot@ubuntu:~#   sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/configroot@ubuntu:~#   sudo chown $(id -u):$(id -g) $HOME/.kube/configroot@ubuntu:~# kubectl get svcNAME         TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGEkubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   9m30s

先删除 $HOME/.kube

1. node NotReady

    root@ubuntu:~# kubectl get nodeNAME     STATUS     ROLES    AGE   VERSIONubuntu   NotReady   master   12m   v1.17.3

因为没有创建flannel网络

    root@ubuntu:~# kubectl create -f kube-flannel.ymlpodsecuritypolicy.policy/psp.flannel.unprivileged createdclusterrole.rbac.authorization.k8s.io/flannel createdclusterrolebinding.rbac.authorization.k8s.io/flannel createdserviceaccount/flannel createdconfigmap/kube-flannel-cfg createddaemonset.apps/kube-flannel-ds-amd64 createddaemonset.apps/kube-flannel-ds-arm64 createddaemonset.apps/kube-flannel-ds-arm createddaemonset.apps/kube-flannel-ds-ppc64le createddaemonset.apps/kube-flannel-ds-s390x createdroot@ubuntu:~# kubectl get nodeNAME     STATUS     ROLES    AGE   VERSIONubuntu   NotReady   master   14m   v1.17.3

等待 网络创建完成

    root@ubuntu:~# kubectl get nodeNAME     STATUS   ROLES    AGE   VERSIONubuntu   Ready    master   15m   v1.17.3

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