keepalived+lvs实现调度、高可用、高性能集群

6、keepalived+lvs实现调度、高可用、高性能集群

Keepalived的作用是：

检 测web服务器的状态，如果有一台web服务器死机，或工作出现故障，Keepalived将检测到，并将有故障的web服务器从系统中剔除，当web服 务器工作正常后Keepalived自动将web服务器加入到服务器群中，这些工作全部自动完成，不需要人工干涉，需要人工做的只是修复故障的web服务 器

  

   (1)安装keepalived

    # ./configure --prefix=/usr/local/keepalived --enable-snmp --enable-profile --with-kernel-version=2.6 --sysconfdir=/etc   

 # make && make install

     
   (2)配置keepalived
     # cd /etc/keepalived
     # vim keepalived.conf
global_defs {
   notification_email {
        [email protected]
   }
   notification_email_from [email protected]
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id lvs-s1
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 30
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass aixocm
    }
    virtual_ipaddress {
        172.16.10.10/24 dev eth0
    }
}

virtual_server 172.16.10.10 80 {
    delay_loop 3
    lb_algo wrr
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 60
    protocol TCP

    real_server 172.16.20.20 80 {
        weight 2
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }

    real_server 172.16.20.30 80 {
        weight 3
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }
}

  # vim /etc/sysconfig/keepalived
  KEEPALIVED_OPTIONS="-D -f /etc/keepalived/keepalived.conf"