Written by arstercz - 2015-05-20

lvs DR模式均衡读请求

env环境: Director IP: 10.0.21.100 vitrual IP: 10.0.21.222 Real server1: 10.0.21.7 Real server2: 10.0.21.17

Director配置:

net.ipv4.ip_forward = 1  # 开启ip转发

ip addr add 10.0.21.222/32 dev eth0; arping -c 3 -U 10.0.21.222 -I eth0 #配置vip并通告网络

ipvsadm -A  -t 10.0.21.222:3301 -s rr                #选择轮询调度模式
ipvsadm -a  -t 10.0.21.222:3301 -r 10.0.21.7:3301 -g
ipvsadm -a  -t 10.0.21.222:3301 -r 10.0.21.17:3301 -g

ipvsadm-save   #保存配置


# ipvsadm -ln  #查看当前配置信息
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.0.21.222:3301 rr
  -> 10.0.21.7:3301               Route   1      0          0         
  -> 10.0.21.17:3301              Route   1      0          0

real server配置:

#将 vip 配置到 lo网卡, 并配置路由
ip addr add 10.0.21.222/32 broadcast 10.0.21.222 dev lo 
ip route add 10.0.21.222/32 via 10.0.21.222

#关闭 arp 
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce

连接测试, 不要在 vip 主机中测试, 可以在 client 主机中测试请求的信息:

[root@cz ~]# mysql -h 10.0.21.222 -P 3301 -upercona percona -Bse "show global variables like 'hostname'"
hostname	cz-test2
[root@cz ~]# mysql -h 10.0.21.222 -P 3301 -upercona percona -Bse "show global variables like 'hostname'"
hostname	cz-test3
[root@cz ~]# mysql -h 10.0.21.222 -P 3301 -upercona percona -Bse "show global variables like 'hostname'"
hostname	cz-test2

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