nginx 热备部署 双主模式

用nginx做负载均衡，作为架构的最前端或中间层，随着日益增长的访问量，需要给负载均衡做高可用架构，利用keepalived解决单点风险，一旦 nginx宕机能快速切换到备份服务器

安装 keepalived

安装 keepalived

yum install nginx keepalived pcre-devel  -y

配置keepalived高可用，修改主配置文件

两台均备份

cp /etc/keepalived/keepalived.conf keepalived.conf.bak

 global_defs {
    vrrp_garp_interval 0
    vrrp_gna_interval 0
 }
 vrrp_instance VI_1 {
     state MASTER    #备用机 修改为 BACKUP
     interface enp0s8
     virtual_router_id 50
     priority 100   # 参数 备用比主机低就可以了 
     advert_int 1
     authentication {
         auth_type PASS
         auth_pass 1111
     }
     virtual_ipaddress {
         192.168.56.120
     }
 }
~        

启动 两台的nginx

systemctl start nginx

启动 keepalived

service keepalived start

检查下状态

检查下IP

检查页面访问