环境准备 master01 node01 node02，连通网络，修改hosts文件，确认3台主机相互解析
vim /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
:: localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.201 master01
192.168.1.202 node01
192.168.1.203 node02
主机配置阿里YUM源
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup && curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
开始部署kubernetes
1.在master01安装etcd
yum install etcd -y
安装完成，修改etcd配置文件/etc/etcd/etcd.conf
vim /etc/etcd/etcd.conf ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379" #修改监听地址
ETCD_LISTEN_CLIENT_URLS="http://192.168.1.201:2379" #修改etcd地址为本机地址
设置服务启动
systemctl start etcd && systemctl enable etcd
2.在所有主机安装kubernetes
yum install kubernetes -y
3.配置master
vim /etc/kubernetes/config KUBE_MASTER="--master=http://192.168.1.201:8080" #修改kube_master地址
vim /etc/kubernetes/apiserver KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0" #修改监听地址
KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.1.201:2379" #修改etcd地址
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota" #删除认证参数ServiceAccount
设置服务启动，启动顺序apiserver>scheduler=controller-manager
systemctl start docker && systemctl enable docker
systemctl start kube-apiserver && systemctl enable kube-apiserver
systemctl start kube-scheduler && systemctl enable kube-scheduler
systemctl start kube-controller-manager && systemctl enable kube-controller-manager
4.配置node
vim /etc/kubernetes/config KUBE_MASTER="--master=http://192.168.1.201:8080" #修改master地址
vim /etc/kubernetes/kubelet KUBELET_ADDRESS="--address=192.168.1.202" #修改kubelet地址
KUBELET_HOSTNAME="--hostname-override=192.168.1.202" #修改kubelet主机名
KUBELET_API_SERVER="--api-servers=http://192.168.1.201:8080" #修改apiserver地址
设置服务启动
systemctl start docker && systemctl enable docker
systemctl start kubelet && systemctl enable kubelet
systemctl start kube-proxy && systemctl enable kube-proxy
5.部署完成，查看集群状态
kubectl get nodes
[root@node02 kubernetes]# kubectl -s http://192.168.1.201:8080 get nodes -o wide
NAME STATUS AGE EXTERNAL-IP
192.168.1.202 Ready 29s <none>
192.168.1.203 Ready 16m <none>
6.在所有主机安装flannel
yum install flannel -y
vim /etc/sysconfig/flanneld FLANNEL_ETCD_ENDPOINTS="http://192.168.1.201:2379" #修改etcd地址
etcdctl mk /atomic.io/network/config '{ "Network": "172.16.0.0/16" }' #在etcd主机设置容器网络
master主机重启服务
systemctl start flanneld && systemctl enable flanneld
systemctl restart docker
systemctl restart kube-apiserver
systemctl restart kube-scheduler
systemctl restart kube-controller-manager
node主机重启服务
systemctl start flanneld && systemctl enable flanneld
systemctl restart docker
systemctl restart kubelet
systemctl restart kube-proxy