1.安装配置Kubernetes Master

[root@server2 ~]# yum -y install etcd kubernetes-master
[root@server2 ~]# vim /etc/etcd/etcd.conf
ETCD_NAME=default
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
ETCD_ADVERTISE_CLIENT_URLS="http://localhost:2379"

[root@server2 ~]# vim /etc/kubernetes/apiserver
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=192.168.10.0/16" #改为自己的ip段
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"
KUBE_API_ARGS=""

[root@localhost ~]# vi /etc/kubernetes/config
###
# kubernetes system config
#
# The following values are used to configure various aspects of all
# kubernetes services, including
#
#   kube-apiserver.service
#   kube-controller-manager.service
#   kube-scheduler.service
#   kubelet.service
#   kube-proxy.service
# logging to stderr means we get it in the systemd journal
KUBE_LOGTOSTDERR="--logtostderr=true"

# journal message level, 0 is debug
KUBE_LOG_LEVEL="--v=0"

# Should this cluster be allowed to run privileged docker containers
KUBE_ALLOW_PRIV="--allow-privileged=false"

# How the controller-manager, scheduler, and proxy find the apiserver
KUBE_MASTER="--master=http://172.168.93.254:8080"

1.1 启动etcd、kube-apiserver、kube-controller-manager、kube-scheduler等服务，并设置开机启动

[root@server2 ~]# for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler; do systemctl restart $SERVICES;systemctl enable $SERVICES;systemctl status $SERVICES ; done

1.2 在etcd中定义flannel网络

etcdctl mk /atomic.io/network/config '{"Network":"192.168.10.0/16"}'

---

2 安装配置Kubernetes Node

yum -y install flannel kubernetes-node

• 为flannel网络指定etcd服务，修改/etc/sysconfig/flanneld文件

[root@server3 ~]# vim /etc/sysconfig/flanneld
FLANNEL_ETCD="http://192.168.10.233:2379" # MASTER节点
FLANNEL_ETCD_KEY="/atomic.io/network"

• 修改/etc/kubernetes/config文件

[root@server3 ~]# vim /etc/kubernetes/config
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://192.168.10.233:8080" # MASTER节点

• 修改对应node的配置文件/etc/kubernetes/kubelet

[root@server3 ~]# vim /etc/kubernetes/kubelet
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_PORT="--port=10250"
KUBELET_HOSTNAME="--hostname-override=172.25.27.3" #修改成对应Node的IP
KUBELET_API_SERVER="--api-servers=http://172.25.27.2:8080" #指定Master节点的API Server
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"

• 在所有Node节点上启动kube-proxy,kubelet,docker,flanneld等服务，并设置开机启动。

[root@server3 ~]# for SERVICES in kube-proxy kubelet docker flanneld;do systemctl restart $SERVICES;systemctl enable $SERVICES;systemctl status $SERVICES; done

3.验证集群是否安装成功

在master上执行如下命令

[root@server2 ~]# kubectl get node
NAME          LABELS                               STATUS    AGE
172.25.27.3   kubernetes.io/hostname=172.25.27.3   Ready     14m