一.准备环境

1.准备4台虚拟机 (我的是centos7.5版本)

二台作为web测试页面 二台为负载+高可用

2.关掉防火墙 setenforce

[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0

二.安装配置两台web测试页面

1.先安装个apache

[root@localhost ~]# yum -y install httpd

2.编辑html测试页面 为了方便区分

[root@localhost ~]# vim /var/www/html/index.html
web1
[root@localhost ~]# vim /var/www/html/index.html
web2

3.启动并查看测试页面

[root@localhost ~]# systemctl start httpd

三.安装配置nginx+keepalived

1.源码安装nginx (两台 136 137)

先安装依赖
[root@localhost ~]# yum -y install gcc gcc-c++ pcre-devel zlib-devel
下载nginx源码包  http://nginx.org/  nginx官方网址

[root@localhost ~]# tar xzf nginx-1.12.2.tar.gz 
[root@localhost ~]# cd nginx-1.12.2
[root@localhost nginx-1.12.2]# ./configure && make && make install

2.配置nginx负载均衡

[root@localhost nginx-1.12.2]# vim /usr/local/nginx/conf/nginx.conf

3.启动nginx并测试负载均衡

[root@localhost nginx-1.12.2]# /usr/local/nginx/sbin/nginx 

4.安装配置keepalived 主 (136)

[root@localhost ~]# yum -y install keepalived
[root@localhost ~]# vim /etc/keepalived/keepalived.conf 

5.启动keepalived 并查看VIP生成没

[root@localhost ~]# systemctl start keepalived

6.安装配置keepalived 从 (137)

[root@localhost ~]# yum -y install keepalived
[root@localhost ~]# vim /etc/keepalived/keepalived.conf 

7.测试 查看VIP是否漂移到从

先把从上的keepalived 启动
[root@localhost nginx-1.12.2]# systemctl start keepalived

在主上把keepalived 关掉
[root@localhost ~]# systemctl stop keepalived

四.在网页上测试VIP

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如果出不来 注意下自己防火墙 要把端口和 VRRP 放行