1、实验环境
两台CentOS-7.5虚拟机
web1：10.0.11.203
web2：10.0.11.204
VIP ：10.0.11.210
web类型：nginx
客户端：自用笔记本(win10)
2、准备两台web服务器
1）web1网卡情况
[[email protected] ~]#
[[email protected] ~]# ip a
2）web2网卡情况
[[email protected] ~]#
[[email protected] ~]# ip a
3）安装nginx
web1端：
[[email protected] ~]#
[[email protected] ~]# yum install nginx
[[email protected] ~]# rpm -qa nginx
nginx-1.16.1-1.el7.x86_64
[[email protected] ~]#
[[email protected] ~]#
[[email protected] ~]# > /usr/share/nginx/html/index.html #清空默认网页
[[email protected] ~]# echo web1 > /usr/share/nginx/html/index.html #让网页显示web1
[[email protected] ~]# cat /usr/share/nginx/html/index.html
web1
[[email protected] ~]#
[[email protected] ~]# systemctl start nginx #启动nginx
[[email protected] ~]# systemctl enable nginx #设置nginx开机自启动
C:\Users\Administrator>curl 10.0.11.203
web2端：
[[email protected] ~]#
[[email protected] ~]# yum install nginx
[[email protected] ~]# rpm -qa nginx
nginx-1.16.1-1.el7.x86_64
[[email protected] ~]#
[[email protected] ~]#
[[email protected] ~]# > /usr/share/nginx/html/index.html
[[email protected] ~]# echo web2 > /usr/share/nginx/html/index.html
[[email protected] ~]# cat /usr/share/nginx/html/index.html
web2
[[email protected] ~]#
[[email protected] ~]# systemctl start nginx
[[email protected] ~]# systemctl enable nginx
C:\Users\Administrator>curl 10.0.11.204
4）安装keepalived
说明：两台web服务器都需要安装keepalived服务
web1端：
[[email protected] ~]#
[[email protected] ~]# yum install keepalived
[[email protected] ~]# rpm -qa keepalived
keepalived-1.3.5-16.el7.x86_64
[[email protected] ~]#
web2端：
[[email protected] ~]#
[[email protected] ~]# yum install keepalived
[[email protected] ~]# rpm -qa keepalived
keepalived-1.3.5-16.el7.x86_64
[[email protected] ~]#
5）配置两台keepalived并启动
web1端：
[[email protected] ~]#
[[email protected] ~]# > /etc/keepalived/keepalived.conf #清空原来的配置
[[email protected] ~]# vim /etc/keepalived/keepalived.conf #编辑配置文件，自定义keepalived配置文件
[[email protected] ~]# cat /etc/keepalived/keepalived.conf
[[email protected] ~]#
[[email protected] ~]# systemctl start keepalived #启动
[[email protected] ~]# systemctl enable keepalived #设置开机启动
web2端：
[[email protected] ~]#
[[email protected] ~]# > /etc/keepalived/keepalived.conf
[[email protected] ~]# vim /etc/keepalived/keepalived.conf
[[email protected] ~]# cat /etc/keepalived/keepalived.conf
[[email protected] ~]#
[[email protected] ~]# systemctl start keepalived #启动
[[email protected] ~]# systemctl enable keepalived #设置开机启动
3、测试访问
方法：用客户端通过VIP测试访问web
C:\Users\Administrator>curl 10.0.11.210 #个人笔记本通过VIP测试访问web
拔掉web1服务器的网线，用客户端通过VIP测试访问web：
C:\Users\Administrator>curl 10.0.11.210
再次将web1服务器的网线接好，用客户端通过VIP测试访问web：
C:\Users\Administrator>curl 10.0.11.210
4、实验结论：
利用keepalived成功实现了web服务器集群的高可用
原文地址：https://blog.51cto.com/14783377/2486373