在刚部署的k8s集群中添加新的master节点时，报了error execution phase preflight: One or more conditions for hosting a new control plane instance is not satisfied的错误，接下来就针对此问题进行解决说明。

kubectl version Client Version: version.Info{Major:"1", Minor:"23", GitVersion:"v1.23.5", GitCommit:"xxx", GitTreeState:"clean", BuildDate:"2022-03-16T15:58:47Z", GoVersion:"go1.17.8", Compiler:"gc", Platform:"linux/amd64"}

kubeadm

kubectl get node NAME          STATUS   ROLES                  AGE     VERSION k8s-master1   Ready    control-plane,master   24h     v1.23.5

#第1步 打印加入集群的相关信息 kubeadm token create --print-join-command kubeadm join xx.xx.xx.xx:6443 --token xxxx.xxxx --discovery-token-ca-cert-hash sha256:xxx ​ #第2步 打印加入master的certs信息 kubeadm init phase upload-certs --upload-certs I0520 14:51:22.848075    1096 version.go:255] remote version is much newer: v1.30.1; falling back to: stable-1.23 [upload-certs] Storing the certificates in Secret "kubeadm-certs" in the "kube-system" Namespace [upload-certs] Using certificate key: aaaaaxxxxxxxxxxxxxxxxxx ​ #第3步 信息拼接（第一步和第二步） kubeadm token create --print-join-command kubeadm join xx.xx.xx.xx:6443 --token xxxx.xxxx --discovery-token-ca-cert-hash sha256:xxx --control-plane --certificate-key aaaaaxxxxxxxxxxxxxxxxxx ​ #第4步 在待加入节点上执行上面第3步的命令，然后报错信息如下： [preflight] Running pre-flight checks     [WARNING Hostname]: hostname "xxx" could not be reached     [WARNING Hostname]: hostname "xxx": lookup xxx on 114.114.114.114:53: no such host     [WARNING Service-Kubelet]: kubelet service is not enabled, please run 'systemctl enable kubelet.service' [preflight] Reading configuration from the cluster... [preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml' error execution phase preflight:  One or more conditions for hosting a new control plane instance is not satisfied. ​ unable to add a new control plane instance to a cluster that doesn't have a stable controlPlaneEndpoint address ​ Please ensure that: * The cluster has a stable controlPlaneEndpoint address. * The certificates that must be shared among control plane instances are provided. ​ ​ To see the stack trace of this error execute with --v=5 or higher

#1 查看 kubeadm-config的信息(只截取了一部分信息) kubectl get  cm kubeadm-config -n kube-system -oyaml ​ apiVersion: v1 data:   ClusterConfiguration: |     apiServer:       extraArgs:         authorization-mode: Node,RBAC       timeoutForControlPlane: 4m0s     apiVersion: kubeadm.k8s.io/v1beta3     certificatesDir: /etc/kubernetes/pki     clusterName: kubernetes     controllerManager: {}     dns: {}     etcd:       local:         dataDir: /var/lib/etcd     imageRepository: xxx     kind: ClusterConfiguration     kubernetesVersion: v1.23.5     networking:       dnsDomain: cluster.local       podSubnet: xx.xx.0.0/16       serviceSubnet: xx.xx.0.0/16     scheduler: {} ​ #2 添加controlPlaneEndpoint kubectl edit cm kubeadm-config -n kube-system ​ apiVersion: v1 data:   ClusterConfiguration: |     apiServer:       extraArgs:         authorization-mode: Node,RBAC       timeoutForControlPlane: 4m0s     apiVersion: kubeadm.k8s.io/v1beta3     certificatesDir: /etc/kubernetes/pki     clusterName: kubernetes     controllerManager: {}     dns: {}     etcd:       local:         dataDir: /var/lib/etcd     imageRepository: xxx     kind: ClusterConfiguration     kubernetesVersion: v1.23.5     #在下面添加一行信息     controlPlaneEndpoint: "xx.xx.xx.xx:port" ## 换成自己的ip和port     networking:       dnsDomain: cluster.local       podSubnet: xx.xx.0.0/16       serviceSubnet: xx.xx.0.0/16     scheduler: {}

#1 重置k8s，然后删除相关文件 kubeadm reset -f rm -rf /etc/kubernetes rm -rf ~/.kube ​ #2 重新初始化 kubeadm init --kubernetes-version 1.23.5 --control-plane-endpoint "xx.xx.xx.xx:port" --pod-network-cidr=xx.xx.xx.xx/16 --service-cidr=xx.xx.xx.xx/16 --upload-certs