4台机器的集群两台centos，两台麒麟v10
问题1.执行到集群和节点加入集群时候报错
ERRO[18:48:06 CST] Failed to add master to cluster: Failed to exec command: sudo env PATH=$PATH:/sbin:/usr/sbin /bin/sh -c "/usr/local/bin/kubeadm join --config=/etc/kubernetes/kubeadm-config.yaml"
Please, check the contents of the H O M E / . k u b e / c o n f i g f i l e . E R R O [ 22 : 15 : 27 C S T ] F a i l e d t o a d d m a s t e r t o c l u s t e r : F a i l e d t o e x e c c o m m a n d : s u d o e n v P A T H = HOME/.kube/config file. ERRO[22:15:27 CST] Failed to add master to cluster: Failed to exec command: sudo env PATH= HOME/.kube/configfile.ERRO[22:15:27CST]Failedtoaddmastertocluster:Failedtoexeccommand:sudoenvPATH=PATH:/sbin:/usr/sbin /bin/sh -c "/usr/local/bin/kubeadm join --config=/etc/kubernetes/kubeadm-config.yaml"
preflight\] Running pre-flight checks \[preflight\] 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: unable to fetch the kubeadm-config ConfigMap: failed to get config map: Get "https://lb.kubesphere.local:6443/api/v1/namespaces/kube-system/configmaps/kubeadm-config?timeout=10s": x509: certificate has expired or is not yet valid: current time 2023-12-04T14:18:43+08:00 is before 2023-12-04T14:14:50Z To see the stack trace of this error execute with --v=5 or higher: Process exited with status 1 node=192.168.0.173 ERRO\[22:15:27 CST\] Failed to add master to cluster: Failed to exec command: sudo env PATH=$PATH:/sbin:/usr/sbin /bin/sh -c "/usr/local/bin/kubeadm join --config=/etc/kubernetes/kubeadm-config.yaml" \[preflight\] Running pre-flight checks \[preflight\] Reading configuration from the cluster... 我初步认为是没权限，没有切换到默认root用户上，因为默认sudo用户的当前目录中没有 .docker文件夹 当我把普通用户换成了root用户后还是报错，且没有生成.docker文件夹 我意外的访问官网发现一个错误，那就是时间同步问题，经过时间同步后解决 这里就截图时间同步了，由于大部分机器自带chronyd时间同步，所以采用该同步方式解决   **问题2flannel启动报错，只有一台起来了，另外三台报错，状态为CrashLoopBackOff** \[root@bu170 \~\]# kubectl logs -f kube-flannel-ds-kqp9h -n kube-system I1204 06:33:02.940977 1 main.go:518\] Determining IP address of default interface E1204 06:33:02.941113 1 main.go:204\] Failed to find any valid interface to use: failed to get default interface: Unable to find default route 装完后发现coredns与flannel都没起来 coredns说没有cni0，那么问题直接定位到flannel了，因为flannel创建时候会顺带创建flannel与cni0 找不到默认的路由，直接去看网卡配置是否有gateway配置，发现只有一张网卡配置了gateway 于是乎另外全部加上gateway  centos8重启网卡 nmcli c reload 麒麟10系统重启网卡 systemctl restart network 当都重启网络时候 悲催的发型先前有gateway的起不来了，先前三台好了 删除flannel.1网卡与cni0网卡 ip link del flannel.1 ip link del cni0 再重启network就全部ok了 至此全部启动