keepalived+lvs实验中lvs的rr机制没有轮询

yangqwer123

使用俩台主机安装keepalived+lvs,俩台主机做real server，lvs为DR模式，采用rr机制，测试时发现对于vip：192.168.122.100的请求都只能发送到其中一台real server上，不能交替的发给后端俩台real server ，没有实现轮询的机制，请指导~


keepalived配置文件
! Configuration File for keepalived

global_defs {

   router_id director1
}



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 {
       192.168.122.100
    }
}

virtual_server 192.168.122.100 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 50
    protocol TCP
real_server 192.168.122.4 80 {
        weight 1
        HTTP_GET {
            url {
              path /test1.html
              digest 2ee55cb8cb23a5db1580d14aa37a5d27
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }

    real_server 192.168.122.5 80 {
        weight 1
        HTTP_GET {
            url {
              path /test2.html
              digest 8145db84654bc4c9dc5fa077a788c9db
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }

}

测试
# ab -c 100 -n 100 http://192.168.122.100/

ipvsadm查询
Every 0.5s: ipvsadm -Lnc                                                            Sun Nov 17 06:16:34 2013

IPVS connection entries
pro expire state       source             virtual            destination
TCP 01:26  FIN_WAIT    192.168.122.1:39157 192.168.122.100:80 192.168.122.4:80
TCP 01:26  FIN_WAIT    192.168.122.1:39142 192.168.122.100:80 192.168.122.4:80
TCP 01:26  FIN_WAIT    192.168.122.1:39105 192.168.122.100:80 192.168.122.4:80
TCP 01:26  FIN_WAIT    192.168.122.1:39099 192.168.122.100:80 192.168.122.4:80
TCP 01:27  FIN_WAIT    192.168.122.1:39191 192.168.122.100:80 192.168.122.4:80
TCP 01:26  FIN_WAIT    192.168.122.1:39155 192.168.122.100:80 192.168.122.4:80
TCP 01:26  FIN_WAIT    192.168.122.1:39123 192.168.122.100:80 192.168.122.4:80
TCP 01:27  FIN_WAIT    192.168.122.1:39180 192.168.122.100:80 192.168.122.4:80
TCP 01:27  FIN_WAIT    192.168.122.1:39188 192.168.122.100:80 192.168.122.4:80
TCP 01:26  FIN_WAIT    192.168.122.1:39150 192.168.122.100:80 192.168.122.4:80
TCP 01:26  FIN_WAIT    192.168.122.1:39109 192.168.122.100:80 192.168.122.4:80
TCP 01:27  FIN_WAIT    192.168.122.1:39175 192.168.122.100:80 192.168.122.4:80
TCP 01:27  FIN_WAIT    192.168.122.1:39194 192.168.122.100:80 192.168.122.4:80
TCP 01:27  FIN_WAIT    192.168.122.1:39195 192.168.122.100:80 192.168.122.4:80
TCP 01:26  FIN_WAIT    192.168.122.1:39146 192.168.122.100:80 192.168.122.4:80
..............................

yangqwer123

查到问题了，是persistence_timeout 50保持时间引起的，设置了保持时间，模拟的批量请求在保持时间内都被定向到同一台机器了。