负载均衡lvs+keepalived 配置2
按照｛负载均衡lvs+keepalived 配置1｝配置好后继续下面keepalived 配置：环境
lvs-master:192.168.1.22
lvs-backup:192.168.1.175 多增加了一台备份机器
rea1:192.168.1.23
rea2:192.168.1.24
1 下载软件
#wget http://www.keepalived.org/software/keepalived-1.1.20.tar.gz
#tar -zxvf keepalived-1.1.20.tar.gz
# cd keepalived-1.1.20
#./configure （安装不成功提示需要安装openssl：yum -y install openssl*）
#make & & make install
#cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
#cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
#mkdir /etc/keepalived
#cp /usr/local/sbin/keepalived /usr/sbin/
#vi /etc/keepalived/keepalived.conf （master服务器:192.168.1.22）
! Configuration File for keepalived
global_defs {
notification_email {
gzbenetbobo@163.com
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id bobo1
}
vrrp_instance VI_1 {
state MASTER 备份机是：BACKUP
interface eth0
virtual_router_id 51
priority 100 优先级需要设置，值越大就是master
advert_int 1
authentication {
auth_type PASS
auth_pass 1
}
virtual_ipaddress {
192.168.1.25 虚拟vip
}
}
virtual_server 192.168.1.25 80 { 虚拟vip
delay_loop 6
lb_algo rr
lb_kind NAT
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 192.168.1.23 80 {
weight 1
SSL_GET {
url {
path /
digest ff20ad2481f97b1754ef3e12ecd3a9cc
}
url {
path /mrtg/
digest 9b3a0c85a887a256d6939da88aabd8cd
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.1.24 80 {
weight 1
SSL_GET {
url {
path /
digest ff20ad2481f97b1754ef3e12ecd3a9cc
}
url {
path /mrtg/
digest 9b3a0c85a887a256d6939da88aabd8cd
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
上述配置完毕后，先查看lvs-master与lvs-backup的IP状态http://s3.运维网.com/wyfs02/M02/49/D3/wKioL1Qbm2ahf56eAABcJMzYXZI946.gif
然后停止lvs-master查看两台分别状态：
http://s3.运维网.com/wyfs02/M01/49/D4/wKioL1Qbm9_ipxdyAABf3UYryM0234.gif
如果IP成功切换到备份机器，但是测试80不通，又可能是ipvsadm没有启动没有监听到real服务，重新启动再行测试，
启动顺序，先启动keepalived 然后重启ipvsadm，查看ipvsadm是否监听：
http://s3.运维网.com/wyfs02/M02/49/D4/wKioL1QbnKGh9Z4XAAAbHadt1n8303.gif
最后一定要在主备设置开机启动，免得日后到出找原因：
chkconfig ipvsadm on
chkconfig keepalived on
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