Kubernetes 之 二进制安装(一)搭建环境说明与前期准备

环境说明

系统：

Centos 7.5

集群：

master1 192.168.214.88

master2 192.168.214.89

master3 192.168.214.90

etcd1 192.168.214.200

etcd2 192.168.214.201

etcd3 192.168.214.202

node1 192.168.214.203

node2 192.168.214.204

node3 192.168.214.205

各节点组件

Master：二进制安装kube-apiserver,kube-scheduler,kube-config-manager(master上的三个重要组件)、kubectl(命令行工具)

说明：kube-scheduler、kube-controller-manager 和 kube-apiserver 三者的功能紧密相关； 同时只能有一个 kube-scheduler、kube-controller-manager 进程处于工作状态，如果运行多个，则需要通过选举产生一个 leader

Etcd：源码二进制安装，选举leader

Node：安装flannel，kubelet，kube-proxy，docker-ce

haproxy：配置tcp代理haroxy组件

软件版本信息

kubernetes：1.12.2

etcd：3.2.22

docker-ce：18.06

flannel：0.9.1

haproxy：1.5.18

准备工作

所有节点关闭防火墙

systemctl stop firewalld && systemctl disable firewalld

所有节点关闭selinux

sed -i "s/SELINUX=.*/SELINUX=disabled/g" /etc/selinux/config && setenforce 0

配置yum源，方便kubernetes组件安装

yum install -y epel-releasevim /etc/yum.repos.d/kubernetes.repo[kubernetes]name=Kubernetesbaseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64enabled=1gpgcheck=0repo_gpgcheck=0gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg  http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

host定向，打通集群主机名通信

vim /etc/hostsmaster1         192.168.214.88        master1master2         192.168.214.89        master2etcd1             192.168.214.200      etcd1etcd2             192.168.214.201      etcd2etcd3             192.168.214.202      etcd3node1            192.168.214.203      node1node2            192.168.214.204      node2

master1生成秘钥，设置免密登录集群其他节点

ssh-keygen   ssh-copy-id   -i  /root/.ssh/id_rsa.pub  master2ssh-copy-id   -i  /root/.ssh/id_rsa.pub  master3ssh-copy-id   -i  /root/.ssh/id_rsa.pub  etcd1ssh-copy-id   -i  /root/.ssh/id_rsa.pub  etcd2ssh-copy-id   -i  /root/.ssh/id_rsa.pub  etcd3ssh-copy-id   -i  /root/.ssh/id_rsa.pub  node1ssh-copy-id   -i  /root/.ssh/id_rsa.pub  node2ssh-copy-id   -i  /root/.ssh/id_rsa.pub  node3ssh-copy-id    -i /root/.ssh/id_rsa.pub  mastercluster

配置ntpdate时间服务器

yum install  ntpdate  -ysystemctl enable ntpdate.servicesystemctl start  ntpdate.service临时同步：ntpdate   time7.aliyun.com设置任务计划crontab -e：*/30 * * * * /usr/sbin/ntpdate time7.aliyun.com >/dev/null 2>&1

关闭swap，否则会导致kubelet启动失败

## 临时关闭：swapoff -a## 永久关闭：sed -i 's/.*swap.*/#&/' /etc/fstab