LVS+keepalived 下部署RTSP負載均衡
一、lvs 虛擬負載均衡服務器總體描述
主要涉及軟件包：ipvsadm 和keepalived(或者heartbeat)
參考下載地址：http://www.keepalived.org/software/keepalived-1.1.15.tar.gz
http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz(linux安裝盤中有)
主機：linux red-had 6.4
主機相關說明：
vip 10.4.127.160 對外暴露ip端口
master 10.4.121.212 控制負載均衡
backup 10.4.120.166 負載均衡備份
rtsp1 10.4.120.165 realserver
rtsp2 10.4.120.163 realserver
註意要求：服務器時間要求同步
命令：
修改時間同步配置文件：vi /etc/ntp.conf 增加server 10.4.121.166 ##10.4.121.166為時間服務器
啟動時間同步服務：service ntpd start
ntpd -p 配置 查看主機對表
時間同步問題：錯誤1.Server dropped: Strata too high
原因：NTP server還沒有和其自身或者它的server同步上。
處理：NTP Server 修改/etc/ntp.conf
server 127.127.1.0
fudge 127.127.1.0 stratum 8
錯誤2.Server dropped: no data
原因：查ntp server的防火墻
處理：service iptables stop
註意：ntpd 只能進行時間微調，如果服務器相差時間過多，需要使用ntpdate 10.4.121.166 調一下，之後啟動服務實時微調
二、maser 上環境準備
1,安裝keepalived
#tar -zxvf keepalived-1.1.15.tar.gz
# cd keepalived-1.1.15
./configure --sysconf=/etc --prefix=/usr/local/keepalived
# make && make install
2,下面設置keepalived以服務方式啟動
設置成為服務並開機啟動:
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
/etc/rc.d/init.d/keepalived status
chkconfig --add keepalived
chkconfig keepalived on
#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/etc/keepalived/keepalived.conf /etc/keepalived/
#cp /usr/local/sbin/keepalived /usr/sbin/
#service keepalived start|stop
3,配置keepalived
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from
smtp_server smtp.163.com
smtp_connect_timeout 30
router_id LVS_DEVEL
lvs_id lvs01
}
vrrp_instance VI_1 {
state MASTER
interface eth0
lvs_sync_daemon_interface eth0
virtual_router_id 50 ##主從一致
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.4.127.160 ##vip
}
}
virtual_server 10.4.127.160 8042 {
delay_loop 2
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP ####換RTSP 在quicktime下測試失敗，keepalived不能失敗自動剔除切換子例
real_server 10.4.120.165 8042 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 8042
}
}
real_server 10.4.120.163 8042 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 8042
}
}
}
----啟動 keepalived 後
[[email protected] keepalived]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 10.4.121.212:8042 rr persistent 600
-> 10.4.120.165:8042 Route 1 0 5
-> 10.4.120.163:8042 Route 1 0 0
在2臺rtsp服務器10.4.120.165/10.4.120.163上添加如下腳本
#vim /etc/init.d/realserver.sh
#!/bin/bash
SNS_VIP=10.4.127.160
. /etc/rc.d/init.d/functions
case "$1" in
start)
ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
/sbin/route add -host $SNS_VIP dev lo:0
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
sysctl -p >/dev/null 2>&1
echo "RealServer Start OK"
;;
stop)
ifconfig lo:0 down
route del $SNS_VIP >/dev/null 2>&1
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stoped"
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0
賦權：
#chmod 755 /etc/init.d/realserver.sh
#sh /etc/init.d/realserver.sh start
四、Backup註意
此處只做master， backup類似操作 只需稍作修改就行
問題：
Keepalived_vrrp: bogus VRRP packet received on eth0 !!!
Keepalived_vrrp: VRRP_Instance(VI_1) ignoring received
解決：
修改/etc/keepalived/keepalived.conf 中virtual_route_id的值
比如
virtual_router_id 60 主從方都要改，默認為51 ，重啟keepalived 即可
1.lvs_id改為lvs02
2.state改為BUCKUP
3.priority改為100，只要比MASTER小就可以。
4、主、從的 virtual_router_id 相同
本文出自 “呼吸雨後泥土的味” 博客，轉載請與作者聯系！
LVS+keepalived 下部署RTSP負載均衡