keepalived+nginx配置高可用负载均衡代理 (原创)

参考：

https://www.cnblogs.com/yanjieli/p/10682064.html
https://www.cnblogs.com/rexcheny/p/10778567.html

keepalived+nginx配置高可用负载均衡代理

1、安装keepalived 服务
yum install keepalived -y 
cd /etc/keepalived/
cp -rf keepalived.conf keepalived.conf.bak

2、配置server01主机

server01上 ：

keepalived.conf 配置如下  (vi /etc/keepalived/keepalived.conf)
global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30

   router_id sev01

}

vrrp_instance VI_1 {
    state MASTER   #主节点
    interface ens192  #网卡名称
    virtual_router_id 51  
    priority 100  #优先级
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
      192.168.0.110/24  dev ens192 label ens192:0  #虚拟ip地址（VIP）
          
    }
   preempt delay 60
}
 

nginx.conf配置如下
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
 
   upstream backend_ccb_wlpt {
      server 192.168.0.126:2323 weight=1 ;
      server 192.168.0.127:2323 weight=1 ;
    }

    server {
       listen  90;
       server_name  localhost;
       location / {
        proxy_pass http://backend_ccb_wlpt;
        proxy_set_header Host $host:$proxy_port;
        proxy_set_header X-Forwarded-For $remote_addr;
      }
    }
}

3、配置server02主机

erver02上： 

keepalived.conf 配置如下  (vi /etc/keepalived/keepalived.conf)

global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id sev02
  
}

vrrp_instance VI_1 {
    state BACKUP  #备份节点
    interface ens192   #网卡名称
    virtual_router_id 51  
    priority 90  #优先级
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }

    virtual_ipaddress {
       192.168.0.110/24  dev ens192 label ens192:0     #虚拟ip地址（VIP）
    }

   preempt delay 60
}

nginx.conf配置如下


http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
 
   upstream backend_ccb_wlpt {
      server 192.168.0.126:2323 weight=1 ;
      server 192.168.0.127:2323 weight=1 ;
    }

    server {
       listen  90;
       server_name  localhost;
       location / {
        proxy_pass http://backend_ccb_wlpt;
        proxy_set_header Host $host:$proxy_port;
        proxy_set_header X-Forwarded-For $remote_addr;
      }
    }

}


3、最后启动keepalived和nginx  （server01、server02上）

nginx -s reload 

sysyetmctl enable keepalived 
sysyetmctl start keepalived 

cat /var/log/messages 
ifconfig  #查看虚拟网卡(VIP网卡)