如何在CentOS7上安装kubernetes
1、修改主机和host解析，关闭selinux192.168.20.11 k8s-master192.168.20.12 k8s-node-1192.168.20.13 k8s-node-2
4、测试：etcdctl set test/test-key 0etcdctl get test/test-key检查集群状态etcdctl -C http://192.168.20.11:2379 cluster-health
5、master节点安装kubernetesyum install kubernetes-master.x86_64 -y修改apiser即枢潋雳ver配置文件vim /etc/kubernetes/apiserver KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"KUBE_API_PORT="--port=8080"KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.20.11:2379"# node节点监听的端口KUBELET_PORT="--kubelet-port=10250"KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny ,ResourceQuota"修改配置文件vim /etc/kubernetes/config#apiserver运行在哪，谁就是KUBE_MASTERKUBE_MASTER="--master=http://192.168.20.11:8080"systemctl enable kube-apiserver.servicesystemctl start kube-apiserver.servicesystemctl enable kube-controller-manager.servicesystemctl start kube-controller-manager.servicesystemctl enable kube-scheduler.service其中个组建的功能：api-server：接收并相应用户的请求controller：控制器的概念，保证docker容器存活schedule：调度器，选择启动容器的node节点
6、两台node节点安装kubernetesyum install kubernetes-node.x86_64 -y修改配置文件即枢潋雳vim /etc/kubernetes/configKUBE_MASTER="--master=http://192.168.20.11:8080"vim /etc/kubernetes/kubeletKUBELET_ADDRESS="--address=0.0.0.0"KUBELET_PORT="--port=10250"# node节点主机名或IP地址KUBELET_HOSTNAME="--hostname-override=192.168.20.12"KUBELET_API_SERVER="--api-servers=http://192.168.20.11:8080"systemctl enable kubelet.servicesystemctl restart kubelet.servicesystemctl enable kube-proxy.servicesystemctl restart kube-proxy.service其中个组建的功能：kubelet：调用docker管理容器的生命周期kube-proxy：提供容器的网络
7、检查能否出结果：[root@k8s-master tools]# kubectl get nodes
9、配置开机启动和重启k8smaster节点：systemctl enable flanneld.servicesystemctl start flanneld.serviceservice docker restartsystemctl restart kube-apiserver.servicesystemctl restart kube-controller-manager.servicesystemctl restart kube-scheduler.servicenode节点：systemctl enable flanneld.servicesystemctl start flanneld.serviceservice docker restartsystemctl restart kubelet.servicesystemctl restart kube-proxy.service
10、flanneld 启动后，宿主机网络会发生一些变化使用ip add命令查看宿主机网络
13、安装k8s完毕