k8s

Kubernetes集群组件:
　　- 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
集群示意图
    Kubernetes工作模式server-client
    Kubenetes Master提供集中化管理Minions
    部署1台Kubernetes Master节点和2台Minion节点

image.png

1 时间同步
2 主机名解析
3 禁用selinux、防火墙
4 主机、角色
192.168.75.111 node1.fgq.com  master
192.168.75.112 node2.fgq.com
192.168.75.113 node3.fgq.com
------------------------------------------------------------------------------
MASTER安装配置
master-node1

yum info etcd
yum info kubernetes-master
yum -y install kubernetes-master etcd
vim /etc/etcd/etcd.conf
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
vim /etc/kubernetes/apiserver
KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
KUBE_API_PORT="--port=8080"
KUBELET_PORT="--kubelet-port=10250"

启动etcd、kube-apiserver、kube-controller-manager、kube-scheduler等服务，并设置开机启动
for SERVICE in etcd kube-apiserver kube-controller-manager kube-scheduler;do systemctl restart $SERVICE;systemctl enable $SERVICE;systemctl status $SERVICE;done

在etcd中定义flannel网络
etcdctl mk /atomic.io/network/config '{"Network":"172.17.0.0/16"}'

------------------------------------------------------------------------------
MINION安装配置

node2-3
yum info flannel kubernetes-node
yum -y install flannel kubernetes-node
vim /etc/sysconfig/flanneld
FLANNEL_ETCD_ENDPOINTS="http://192.168.75.111:2379"
vim /etc/kubernetes/config
KUBE_MASTER="--master=http://192.168.75.111:8080"

node2
vim /etc/kubernetes/kubelet
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_PORT="--port=10250"
KUBELET_HOSTNAME="--hostname-override=192.168.75.112"
KUBELET_API_SERVER="--api-servers=http://192.168.75.111:8080"

node3
vim /etc/kubernetes/kubelet
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_PORT="--port=10250"
KUBELET_HOSTNAME="--hostname-override=192.168.75.113"
KUBELET_API_SERVER="--api-servers=http://192.168.75.111:8080"

node2-3
启动kube-proxy,kubelet,docker,flanneld等服务，并设置开机启动
for SERVICE in kube-proxy kubelet docker flanneld;do systemctl restart $SERVICE;systemctl enable $SERVICE;systemctl status $SERVICE;done