LVS+Keepalived实现高可用集群 二

五．利用Keepalvied实现负载均衡和和高可用性

1.配置在主负载均衡服务器上配置keepalived.conf

#vi /etc/keepalived/keepalived.conf (主调度器)

 

! Configuration File for keepalived global_defs {    notification_email {      [email protected]      [email protected]      [email protected]    }    notification_email_from [email protected]    smtp_server 127.0.0.1    smtp_connect_timeout 30    router_id LVS_DEVEL } vrrp_instance VI_1 {     state MASTER     interface eth0     virtual_router_id 51     priority 100     advert_int 1     authentication {         auth_type PASS         auth_pass 1111     }     virtual_ipaddress {         192.168.2.170     } } virtual_server 192.168.2.170 80 {     delay_loop 6     lb_algo wrr     lb_kind DR     persistence_timeout 60     protocol TCP        real_server 192.168.2.171 80 {         weight 3                     TCP_CHECK {         connect_timeout 10           nb_get_retry 3         delay_before_retry 3         connect_port 80  }      }     real_server 192.168.2.172 80 {         weight 3         TCP_CHECK {         connect_timeout 10         nb_get_retry 3         delay_before_retry 3         connect_port 80         }      } }

 

在备用调度器上：

#vi /etc/keepalived/keepalived.conf (备用调度器)

 

! Configuration File for keepalived global_defs {    notification_email {      [email protected]      [email protected]      [email protected]    }    notification_email_from [email protected]    smtp_server 127.0.0.1    smtp_connect_timeout 30    router_id LVS_DEVEL } vrrp_instance VI_1 {     state BACKUP     interface eth0     virtual_router_id 51     priority 99     advert_int 1     authentication {         auth_type PASS         auth_pass 1111     }     virtual_ipaddress {         192.168.2.170     } } virtual_server 192.168.2.170 80 {     delay_loop 6     lb_algo wrr     lb_kind DR     persistence_timeout 60     protocol TCP        real_server 192.168.2.171 80 {         weight 3                     TCP_CHECK {         connect_timeout 10           nb_get_retry 3         delay_before_retry 3         connect_port 80  }      }     real_server 192.168.2.172 80 {         weight 3         TCP_CHECK {         connect_timeout 10         nb_get_retry 3         delay_before_retry 3         connect_port 80         }      } }

 

2. BACKUP服务器同上配置，先安装lvs再按装keepalived,仍后配置/etc/keepalived/keepalived.conf，只需将红色标示的部分改一下即可.

3. vi /etc/rc.local
   #/usr/local/sbin/lvs-dr.sh  将lvs-dr.sh这个脚本注释掉。
   #/usr/local/sbin/lvs-dr.sh stop 停止lvs-dr脚本
   #/etc/init.d/keepalived start  启动keepalived 服务，keepalived就能利用keepalived.conf 配
   置文件，实现负载均衡和高可用.

4. 查看lvs服务是否正常
  

#watch ipvsadm –ln

 

IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddressort Scheduler Flags   -> RemoteAddressort           Forward Weight ActiveConn InActConn TCP  61.164.122.8:80 wrr persistent 60   -> 61.164.122.10:80            Route   3      0          0   -> 61.164.122.9:80             Route   3      0          0

复制代码

#tail –f /var/log/message  监听日志，查看状态，测试LVS负载均衡及高可用性是否有效。

5．停Master服务器的keepalived服务，查看BAKCUP服务器是否能正常接管服务。


四．相关参考

1．LVS 基础知识汇总

LVS的算法介绍            http://www.linuxtone.org/viewthread.php?tid=69
学习LVS的三种转发模式     http://www.linuxtone.org/viewthread.php?tid=77
LVS中的IP负载均衡技术     http://www.linuxtone.org/viewthread.php?tid=68

更多的请到http://www.linuxtone.org 负载均衡版查看

Keepalived 相关参考资料。
   http://www.keepalived.org/documentation.html

原文地址 http://blog.chinaunix.net/u/18630/showart_1889903