Lvs+keepalived实现负载均衡、故障剔除(DR模式)

淡淡回忆

Node1: 192.168.1.253
Node2: 192.168.1.254
VIP: 192.168.1.250

环境 centos5.2（我这里是用两台机实现的）
1、安装ipvsadm
yum -y install ipvsadm

2、安装keepalived
[root@node1 ~]# wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz
[root@node1 ~]# tar zxvf keepalived-1.1.15.tar.gz
[root@node1 ~]# cd keepalived-1.1.15
[root@node1 keepalived-1.1.15]# ./configure --prefix=/ --mandir=/usr/local/share/man/ --with-kernel-dir=/usr/src/kernels/2.6.18-92.el5-i686/
configure后会输入这结果为正确
Keepalived configuration
------------------------
Keepalived version       : 1.1.15
Compiler                 : gcc
Compiler flags           : -g -O2
Extra Lib                : -lpopt -lssl -lcrypto
Use IPVS Framework       : Yes    #支持lvs
IPVS sync daemon support : Yes  
Use VRRP Framework       : Yes
Use LinkWatch            : No
Use Debug flags          : No

[root@node1 keepalived-1.1.15]# make && make install
到此，lvs+keepalived安装完成。但是还不能使用lvs功能，接下来以dr模式配置lvs+keepalived

3、[root@node1 ~]# cd /etc/keepalived/
[root@node1 keepalived]# vim keepalived.conf
! Configuration File for keepalived
global_defs {
   notification_email {
    shanswei@gmail.com
   }
   notification_email_from  shanswei@gmail.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state MASTER      ##主lvs设置成master
    interface eth0
    virtual_router_id 51
    priority 102     ##从lvs设置成 99
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
       192.168.1.250 ## 如多个vip，继续换行填写。
    }
}
virtual_server 192.168.1.250 80 {
    delay_loop 6
    lb_algo wlc
    lb_kind DR
    persistence_timeout 50
    protocol TCP

    real_server 192.168.1.253 80 {
        weight 3
        TCP_CHECK {
        connect_port 80
        connect_timeout 30
        }
    }
    real_server 192.168.1.254 80 {
        weight 1
        TCP_CHECK {
        connect_port 80
        connect_timeout 30
        }
    }

好了，keepalived配置完成了。
启动keepalived