按照提示保存以下内容，一会要使用：
kubeadm join master.k8s.io:16443 --token txwxys.lpyfg7ze218akqtw \ --discovery-token-ca-cert-hash sha256:f2275499d9e26a7ce76745138dfa10fdfc336cf1bee22314c26989fe6deb4372 \ --control-plane查看集群状态
kubectl get cs kubectl get pods -n kube-system遇到的问题：
scheduler Unhealthy Get "http://127.0.0.1:10251/healthz": dial tcp 127.0.0.1:10251: connect: connection refused controller-manager Unhealthy Get "http://127.0.0.1:10252/healthz": dial tcp 127.0.0.1:10252: connect: connection refused注释掉后的结果
[root@master2 manifests]# kubectl get cs Warning: v1 ComponentStatus is deprecated in v1.19+ NAME STATUS MESSAGE ERROR scheduler Unhealthy Get "http://127.0.0.1:10251/healthz": dial tcp 127.0.0.1:10251: connect: connection refused controller-manager Healthy ok etcd-0 Healthy {"health":"true"} [root@master2 manifests]# kubectl get cs Warning: v1 ComponentStatus is deprecated in v1.19+ NAME STATUS MESSAGE ERROR scheduler Healthy ok controller-manager Healthy ok etcd-0 Healthy {"health":"true"} 安装集群网络从官方地址获取到flannel的yaml，在master1上执行
mkdir flannel cd flannel wget -c https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml安装flannel网络
kubectl apply -f kube-flannel.yml检查
kubectl get pods -n kube-system [root@master2 manifests]# mkdir flannel [root@master2 manifests]# cd flannel [root@master2 flannel]# wget -c https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml --2021-06-14 09:55:17-- https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 185.199.110.133, 185.199.111.133, 185.199.108.133, ... Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|185.199.110.133|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 4813 (4.7K) [text/plain] Saving to: ‘kube-flannel.yml’ 100%[======================================================================================================================================================>] 4,813 8.77KB/s in 0.5s 2021-06-14 09:55:18 (8.77 KB/s) - ‘kube-flannel.yml’ saved [4813/4813] [root@master2 flannel]# kubectl apply -f kube-flannel.yml podsecuritypolicy.policy/psp.flannel.unprivileged created clusterrole.rbac.authorization.k8s.io/flannel created clusterrolebinding.rbac.authorization.k8s.io/flannel created serviceaccount/flannel created configmap/kube-flannel-cfg created daemonset.apps/kube-flannel-ds created [root@master2 flannel]# kubectl get pods -n kube-system master1节点加入集群 复制密钥及相关文件从master1复制密钥及相关文件到master2
# ssh root@47.109.31.67 mkdir -p /etc/kubernetes/pki/etcd # scp /etc/kubernetes/admin.conf root@47.109.31.67:/etc/kubernetes # scp /etc/kubernetes/pki/{ca.*,sa.*,front-proxy-ca.*} root@47.109.31.67:/etc/kubernetes/pki # scp /etc/kubernetes/pki/etcd/ca.* root@47.109.31.67:/etc/kubernetes/pki/etcd [root@master2 flannel]# ssh root@47.109.31.67 mkdir -p /etc/kubernetes/pki/etcd root@47.109.31.67\'s password: [root@master2 flannel]# scp /etc/kubernetes/admin.conf root@47.109.31.67:/etc/kubernetes root@47.109.31.67\'s password: admin.conf 100% 5570 8.7MB/s 00:00 [root@master2 flannel]# scp /etc/kubernetes/pki/{ca.*,sa.*,front-proxy-ca.*} root@47.109.31.67:/etc/kubernetes/pki root@47.109.31.67\'s password: ca.crt 100% 1066 2.2MB/s 00:00 ca.key 100% 1675 3.6MB/s 00:00 sa.key 100% 1675 3.7MB/s 00:00 sa.pub 100% 451 1.1MB/s 00:00 front-proxy-ca.crt 100% 1078 2.6MB/s 00:00 front-proxy-ca.key 100% 1675 4.1MB/s 00:00 [root@master2 flannel]# scp /etc/kubernetes/pki/etcd/ca.* root@47.109.31.67:/etc/kubernetes/pki/etcd root@47.109.31.67\'s password: ca.crt 100% 1058 2.3MB/s 00:00 ca.key