Keepalived+LVSDR模式配置高可用负载均衡集群

实验拓扑如下&＃xff1a;

二、服务器ip配置信息

1. ip_lb 主机(master) :

2.ip_lb_2 主机 (backup)

3.web1 主机

4.web2 主‍‍‍‍‍‍‍‍‍‍‍‍

三、在master和backup分别查看是否有ipvsadm软件

1. 检查ipvsadm是否安装

rpm -qa ipvsadm*

rpm -vih ipvsadm*

yum install -y ipvsadm*

yum 配置文件

[maweibing]
named&＃61;maweibing
baseurl&＃61;file:///mnt/
enabled&＃61;1
gpgcheck&＃61;1
gpgkey&＃61;file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

2. 检查模版是否加入内核

#global define
global_defs {
router_id LVS_T1
}vrrp_sync_group bl_group {
group {bl_one
}
}vrrp_instance bl_one {state MASTERinterface eth0lvs_sync_daemon_interface eth0virtual_router_id 38priority 150advert_int 3authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.96.100}
}virtual_server 192.168.96.100 8099 {delay_loop 3lb_algo rrlb_kind DRpersistence_timeout 1protocol TCPreal_server 192.168.96.33 8099 {weight 1 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 8099 } } real_server 192.168.96.4 8099 { weight 1 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 8099 } }
}

#global define
global_defs {
router_id LVS_T2
}vrrp_sync_group bl_group {
group {bl_one
}
}vrrp_instance bl_one {state BACKUPinterface eth0lvs_sync_daemon_interface eth0virtual_router_id 38priority 120advert_int 3authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.96.100}
}virtual_server 192.168.96.100 8099 {delay_loop 3lb_algo rrlb_kind DRpersistence_timeout 1protocol TCPreal_server 192.168.96.33 8099 { weight 1 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 8099 } } real_server 192.168.96.4 8099 { weight 1 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 8099 } }
}

8. 分别在主备上启动keepalived
[root&＃64;ip_lb home]# /etc/init.d/keepalived start
Starting keepalived: [ OK ]

[root&＃64;ip_lb home]# tail -f /var/log/message


# PS:这里说的LVS.并不是用ipvsadm软件配置.而是直接用keepalived的virtual_server配置项控制的.
# 安装ipvsadm只是可以看到负载状况.其实只需要keepalived也可以实现负载均衡集群.

六、在web1和web2主机上配置LVS-DR的相关配置.
1. vim /etc/init.d/lvsDR_node &＃xff08;web1主机&＃xff09;

#! /bin/sh
# descript : start real server DR
VIP&＃61;192.168.96.100
. /etc/rc.d/init.d/functions
case "$1" instart)echo "start LVS of RealServer DR"/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 upecho "1" > /proc/sys/net/ipv4/conf/all/arp_ignoreecho "2" > /proc/sys/net/ipv4/conf/all/arp_announce;;stop)/sbin/ifconfig lo:0 downecho "close LVS of RealServer DR"echo "0" > /proc/sys/net/ipv4/conf/all/arp_ignoreecho "0" > /proc/sys/net/ipv4/conf/all/arp_announce;;*)echo "Usage : $0 {start|stop}"exit 1
esac

#! /bin/sh
for((i&＃61;1;i<&＃61;100;i&＃43;&＃43;));do
curl http://192.168.96.100:8099 >> /tmp/q;
done


结果:


九、测试断开一个web服务或加入一个web服务
现在关闭 web2主机(192.168.96.4) 的web 服务..
查看日志可以看到:


现在再把 web2主机(192.168.96.4)的web 服务加入进来:
查看日志可以看到:


十、 测试HA
现在模拟主(master)的keepalived主机死掉. 
备机的日志文件:


可以看到备机的keepalived已经开始工作....