root@k8s-master01:~# kubectl get pod -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
coredns-576cbf47c7-2dqsj 0/1 Pending 0 4m29s <none> <none> <none>
coredns-576cbf47c7-7sqqz 0/1 Pending 0 4m29s <none> <none> <none>
kube-apiserver-k8s-master01 1/1 Running 0 3m46s 10.3.1.20 k8s-master01 <none>
kube-controller-manager-k8s-master01 1/1 Running 0 3m40s 10.3.1.20 k8s-master01 <none>
kube-proxy-dpvkk 1/1 Running 0 4m30s 10.3.1.20 k8s-master01 <none>
kube-scheduler-k8s-master01 1/1 Running 0 3m37s 10.3.1.20 k8s-master01 <none>
root@k8s-master01:~#
# 因为设置了taints(污点)，所以coredns是Pending状态。
拷贝生成的pki目录到各master节点
root@k8s-master01:~# scp -r /etc/kubernetes/pki root@10.3.1.21:/etc/kubernetes/
root@k8s-master01:~# scp -r /etc/kubernetes/pki root@10.3.1.25:/etc/kubernetes/
把kubeadm的配置文件也拷过去
root@k8s-master01:~/# scp kubeadm-config.yaml root@10.3.1.21:~/
root@k8s-master01:~/# scp kubeadm-config.yaml root@10.3.1.25:~/
第一台Master部署完成了，接下来的第二和第三台，无论后面有多少个Master都使用相同的kubeadm-config.yaml进行初始化
第二台执行kubeadm init
root@k8s-master02:~# kubeadm init --config kubeadm-config.yaml
[init] using Kubernetes version: v1.12.0
[preflight] running pre-flight checks
[preflight/images] Pulling images required for setting up a Kubernetes cluster
[preflight/images] This might take a minute or two, depending on the speed of your internet connection
第三台master执行kubeadm init
root@k8s-master03:~# kubeadm init --config kubeadm-config.yaml
[init] using Kubernetes version: v1.12.0
[preflight] running pre-flight checks
[preflight/images] Pulling images required for setting up a Kubernetes cluster
最后查看Node：
root@k8s-master01:~# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 NotReady master 31m v1.12.0
k8s-master02 NotReady master 15m v1.12.0
k8s-master03 NotReady master 6m52s v1.12.0
root@k8s-master01:~#
查看各组件运行状态：
# 核心组件已正常running
root@k8s-master01:~# kubectl get pod -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
coredns-576cbf47c7-2dqsj 0/1 ContainerCreating 0 31m <none> k8s-master02 <none>
coredns-576cbf47c7-7sqqz 0/1 ContainerCreating 0 31m <none> k8s-master02 <none>
kube-apiserver-k8s-master01 1/1 Running 0 30m 10.3.1.20 k8s-master01 <none>
kube-apiserver-k8s-master02 1/1 Running 0 15m 10.3.1.21 k8s-master02 <none>
kube-apiserver-k8s-master03 1/1 Running 0 6m24s 10.3.1.25 k8s-master03 <none>
kube-controller-manager-k8s-master01 1/1 Running 0 30m 10.3.1.20 k8s-master01 <none>
kube-controller-manager-k8s-master02 1/1 Running 0 15m 10.3.1.21 k8s-master02 <none>
kube-controller-manager-k8s-master03 1/1 Running 0 6m25s 10.3.1.25 k8s-master03 <none>
kube-proxy-6tfdg 1/1 Running 0 16m 10.3.1.21 k8s-master02 <none>
kube-proxy-dpvkk 1/1 Running 0 31m 10.3.1.20 k8s-master01 <none>
kube-proxy-msqgn 1/1 Running 0 7m44s 10.3.1.25 k8s-master03 <none>
kube-scheduler-k8s-master01 1/1 Running 0 30m 10.3.1.20 k8s-master01 <none>
kube-scheduler-k8s-master02 1/1 Running 0 15m 10.3.1.21 k8s-master02 <none>
kube-scheduler-k8s-master03 1/1 Running 0 6m26s 10.3.1.25 k8s-master03 <none>
去除所有master上的taint(污点)，让master也可被调度：
root@k8s-master01:~# kubectl taint nodes --all node-role.kubernetes.io/master-
node/k8s-master01 untainted
node/k8s-master02 untainted
node/k8s-master03 untainted
所有节点是"NotReady"状态，需要安装CNI插件
安装Calico网络插件：