一、kubernetes组件和角色分布

组件功能：

　　- etcd 一个高可用的K/V键值对存储和服务发现系统

　　- flannel 实现夸主机的容器网络的通信

　　- kube-apiserver 提供kubernetes集群的API调用

　　- kube-controller-manager 确保集群服务

　　- kube-scheduler 调度容器，分配到Node

　　- kubelet 在Node节点上按照配置文件中定义的容器规格启动容器

　　- kube-proxy 提供网络代理服务

角色分布：

配置epel-release源

# yum -y install epel-release

二、 master节点配置

1.在master上安装etcd和kubernetes-master

[root@dockertest ~]# yum -y install etcd kubernetes-master

2.修改etcd配置文件

[root@dockertest ~]# cat /etc/etcd/etcd.conf | grep -v "^#"ETCD_DATA_DIR="/var/lib/etcd/default.etcd"ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"ETCD_NAME="default"ETCD_ADVERTISE_CLIENT_URLS="http://localhost:2379"

3.修改kubernetes配置文件

[root@dockertest ~]# cat /etc/kubernetes/apiserver | grep -v "^#" | grep -v "^$"KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"KUBE_API_PORT="--port=8080"KUBELET_PORT="--kubelet-port=10250"KUBE_ETCD_SERVERS="--etcd-servers=http://127.0.0.1:2379"KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"KUBE_API_ARGS=""

4.设置服务启动

[root@dockertest ~]# for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler; do systemctl restart $SERVICES;systemctl enable $SERVICES;systemctl status $SERVICES ; done

5.在etcd中定义flannel网络

[root@dockertest ~]# etcdctl mk /atomic.io/network/config '{"Network":"172.17.0.0/16"}'{"Network":"172.17.0.0/16"}

三、node节点配置

1.在所有node节点上安装flannel和kubernetes-node

[root@machine1 ~]# yum -y install flannel kubernetes-node

2.修改flannel配置文件

[root@machine1 ~]# cat /etc/sysconfig/flanneld | grep -v "^#" | grep -v "^$"FLANNEL_ETCD_ENDPOINTS="http://192.168.10.131:2379"FLANNEL_ETCD_PREFIX="/atomic.io/network"

3.修改kubernetes配置文件

[root@machine2 ~]# cat /etc/kubernetes/config | grep -v "^#" | grep -v "^$"KUBE_LOGTOSTDERR="--logtostderr=true"KUBE_LOG_LEVEL="--v=0"KUBE_ALLOW_PRIV="--allow-privileged=false"KUBE_MASTER="--master=http://192.168.10.131:8080"

[root@machine1 ~]# cat /etc/kubernetes/kubelet| grep -v "^#" | grep -v "^$"KUBELET_ADDRESS="--address=0.0.0.0"KUBELET_PORT="--port=10250"KUBELET_HOSTNAME="--hostname-override=192.168.10.128"KUBELET_API_SERVER="--api-servers=http://192.168.10.131:8080" #修改成对应Node的IPKUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"KUBELET_ARGS=""

4.启动kube-proxy,kubelet,docker,flanneld等服务

[root@machine2 ~]# for SERVICES in kube-proxy kubelet docker flanneld;do systemctl restart $SERVICES;systemctl enable $SERVICES;systemctl status $SERVICES; done

四、查看集群启动情况

[root@dockertest ~]# kubectl get nodeNAME             STATUS    AGE192.168.10.128   Ready     1m192.168.10.135   Ready     1m