lvs+keepalived+nginx (httpd)部署
1:192.168.22.109 lvs1
192.168.22.110 lvs2
192.168.22.240 VIP
4：lvs的三种模式图
lvs-nethttp://www.linuxvirtualserver.org/VS-NAT.html
LVS-TUN http://www.linuxvirtualserver.org/VS-IPTunneling.html
LVS-DR http://www.linuxvirtualserver.org/VS-DRouting.html
lvs的三种模式比较参考：http://www.uml.org.cn/zjjs/201211124.asp，此文章说的很详细
注：LVS部署方式：http://www.cnblogs.com/liangsky/p/4585747.html
5）安装keepalived(两台)
wget http://www.keepalived.org/software/keepalived-1.2.17.tar.gz
./configure
make && make install
cp /root/keepalived-1.2.17/keepalived/etc/init.d/keepalived.rh.init /etc/init.d/keepalived
cp /root/keepalived-1.2.17/keepalived/etc/init.d/keepalived.sysconfig /etc/sysconfig/keepalived
mkdir /etc/keepalived/
cp /root/keepalived-1.2.17/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/sbin/keepalived /usr/sbin/
# service keepalived start
Starting Keepalived for LVS: [确定]
6）配置keepalived
先master
global_defs {
notification_email {
11@163.net
71@qq.com #需要发送的告警的邮箱地址
}
notification_email_from yw_xunjian@test.com#从哪个邮箱发送过来
smtp_server mail.test.com#发送邮箱服务端地址
smtp_connect_timeout 30
router_id LVS_master
}
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 {
#192.168.200.16
#192.168.200.17
192.168.22.240
}
}
virtual_server 192.168.22.240 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
#sorry_server 192.168.200.200 1358
real_server 192.168.22.109 80 {
weight 1
TCP_CHECK{
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.22.110 80 {
weight 1
TCP_CHECK{
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
备机配置：
global_defs {
notification_email {
zhaoliang@zdsoft.net
79790562@qq.com
}
notification_email_from ywb_xunjian@winupon.com
smtp_server mail.winupon.com
smtp_connect_timeout 30
router_id LVS_master
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
#192.168.200.16
#192.168.200.17
192.168.22.240
}
}
virtual_server 192.168.22.240 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
#sorry_server 192.168.200.200 1358
real_server 192.168.22.109 80 {
weight 1
TCP_CHECK{
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.22.110 80 {
weight 1
TCP_CHECK{
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
在两机上执行service keepalived start
查看IP地址：ip a
可以看到VIP地址在主机上
在主机上执行service keepalived stop
可以看到VIP已经到了备机
# 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.
yum -y install httpd
主机上执行ipvsadm
# service ipvsadm status
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP192.168.22.240:80 rr persistent 50
-> 192.168.22.109:80 Local 1 0 0
-> 192.168.22.110:80 Route 1 0 0
备机上执行
# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
sed -i 's/net.ipv4.ip_forward = 0/net.ipv4.ip_forward = 1/g' /etc/sysctl.conf
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