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操作系统信息
Vmware 虚拟机，Centos7 (内核：6.0.0-1.el7.elrepo.x86_64)
Kubernetes 版本信息
版本：v1.21.10，使用 kubeadm 安装
Docker 版本
版本：v20.10.19
遇到的问题
kubeadm init 初始化之后可以正常加入Node节点，正常使用无任何问题
重启虚拟机之后，无法使用，报错信息如下
k8s重启 The connection to the server 192.168.100.160:6443 was refused - did you specify the right host or port?
然后发现 docker 所有容器都未启动，挨个启动容器，最后有三个容器无法启动
到这里，kubectl get node 命令可以使用，且 node1 和 node2 都为 Ready状态，mater为 NotReady
k8s-master NotReady control-plane,master 61m v1.21.10
k8s-node1 Ready <none> 60m v1.21.10
k8s-node2 Ready <none> 60m v1.21.10
CNI 网络插件容器，无法启动
容器日志信息
registry.aliyuncs.com/google_containers/pause
[root@k8s-master ~]# docker logs -f d9df99e20ba8
I1022 12:13:07.803445 1 main.go:204] CLI flags config: {etcdEndpoints:http://127.0.0.1:4001,http://127.0.0.1:2379 etcdPrefix:/coreos.com/network etcdKeyfile: etcdCertfile: etcdCAFile: etcdUsername: etcdPassword: version:false kubeSubnetMgr:true kubeApiUrl: kubeAnnotationPrefix:flannel.alpha.coreos.com kubeConfigFile: iface:[] ifaceRegex:[] ipMasq:true ifaceCanReach: subnetFile:/run/flannel/subnet.env publicIP: publicIPv6: subnetLeaseRenewMargin:60 healthzIP:0.0.0.0 healthzPort:0 iptablesResyncSeconds:5 iptablesForwardRules:true netConfPath:/etc/kube-flannel/net-conf.json setNodeNetworkUnavailable:true}
W1022 12:13:07.803595 1 client_config.go:617] Neither --kubeconfig nor --master was specified. Using the inClusterConfig. This might not work.
I1022 12:13:07.904757 1 kube.go:126] Waiting 10m0s for node controller to sync
I1022 12:13:07.904902 1 kube.go:420] Starting kube subnet manager
I1022 12:13:08.905497 1 kube.go:133] Node controller sync successful
I1022 12:13:08.905545 1 main.go:224] Created subnet manager: Kubernetes Subnet Manager - k8s-master
I1022 12:13:08.905551 1 main.go:227] Installing signal handlers
I1022 12:13:08.906301 1 main.go:467] Found network config - Backend type: vxlan
I1022 12:13:08.906343 1 match.go:206] Determining IP address of default interface
I1022 12:13:08.906884 1 match.go:259] Using interface with name ens32 and address 192.168.100.160
I1022 12:13:08.906941 1 match.go:281] Defaulting external address to interface address (192.168.100.160)
I1022 12:13:08.907057 1 vxlan.go:138] VXLAN config: VNI=1 Port=0 GBP=false Learning=false DirectRouting=false
I1022 12:13:09.004262 1 main.go:416] Current network or subnet (10.244.0.0/16, 10.244.0.0/24) is not equal to previous one (0.0.0.0/0, 0.0.0.0/0), trying to recycle old iptables rules
I1022 12:13:09.305994 1 main.go:342] Setting up masking rules
I1022 12:13:09.309750 1 main.go:364] Changing default FORWARD chain policy to ACCEPT
I1022 12:13:09.405880 1 main.go:379] Wrote subnet file to /run/flannel/subnet.env
I1022 12:13:09.406186 1 main.go:383] Running backend.
I1022 12:13:09.406795 1 vxlan_network.go:61] watching for new subnet leases
I1022 12:13:09.504856 1 main.go:404] Waiting for all goroutines to exit
I1022 12:13:09.603554 1 iptables.go:219] bootstrap done
I1022 12:13:09.605576 1 iptables.go:219] bootstrap done
I1022 12:40:10.765213 1 main.go:204] CLI flags config: {etcdEndpoints:http://127.0.0.1:4001,http://127.0.0.1:2379 etcdPrefix:/coreos.com/network etcdKeyfile: etcdCertfile: etcdCAFile: etcdUsername: etcdPassword: version:false kubeSubnetMgr:true kubeApiUrl: kubeAnnotationPrefix:flannel.alpha.coreos.com kubeConfigFile: iface:[] ifaceRegex:[] ipMasq:true ifaceCanReach: subnetFile:/run/flannel/subnet.env publicIP: publicIPv6: subnetLeaseRenewMargin:60 healthzIP:0.0.0.0 healthzPort:0 iptablesResyncSeconds:5 iptablesForwardRules:true netConfPath:/etc/kube-flannel/net-conf.json setNodeNetworkUnavailable:true}
W1022 12:40:10.765942 1 client_config.go:617] Neither --kubeconfig nor --master was specified. Using the inClusterConfig. This might not work.
W1022 12:40:10.766334 1 client_config.go:622] error creating inClusterConfig, falling back to default config: open /var/run/secrets/kubernetes.io/serviceaccount/token: no such file or directory
E1022 12:40:10.767008 1 main.go:221] Failed to create SubnetManager: fail to create kubernetes config: invalid configuration: no configuration has been provided, try setting KUBERNETES_MASTER environment variable
I1022 12:40:21.858010 1 main.go:204] CLI flags config: {etcdEndpoints:http://127.0.0.1:4001,http://127.0.0.1:2379 etcdPrefix:/coreos.com/network etcdKeyfile: etcdCertfile: etcdCAFile: etcdUsername: etcdPassword: version:false kubeSubnetMgr:true kubeApiUrl: kubeAnnotationPrefix:flannel.alpha.coreos.com kubeConfigFile: iface:[] ifaceRegex:[] ipMasq:true ifaceCanReach: subnetFile:/run/flannel/subnet.env publicIP: publicIPv6: subnetLeaseRenewMargin:60 healthzIP:0.0.0.0 healthzPort:0 iptablesResyncSeconds:5 iptablesForwardRules:true netConfPath:/etc/kube-flannel/net-conf.json setNodeNetworkUnavailable:true}
W1022 12:40:21.858133 1 client_config.go:617] Neither --kubeconfig nor --master was specified. Using the inClusterConfig. This might not work.
W1022 12:40:21.858157 1 client_config.go:622] error creating inClusterConfig, falling back to default config: open /var/run/secrets/kubernetes.io/serviceaccount/token: no such file or directory
E1022 12:40:21.858518 1 main.go:221] Failed to create SubnetManager: fail to create kubernetes config: invalid configuration: no configuration has been provided, try setting KUBERNETES_MASTER environment variable
[root@k8s-master ~]# kubectl get pod
