lvs 虚拟负载均衡云服务器总体描述

下文给大家带来lvs 虚拟负载均衡云服务器总体描述，希望能够给大家在实际运用中带来一定的帮助，负载均衡涉及的东西比较多，理论也不多，网上有很多书籍，今天我们就用开发云在行业内累计的经验来做一个解答。一、lvs 虚拟负载均衡云服务器总体描述主要涉及软件包：ipvsadm 和keepalived(或者heartbeat)1.24.tar.gz(linux安装盘中有)
主机：linux red-had 6.4主机相关说明：vip 10.4.127.160 对外暴露ip端口master 10.4.121.212 控制负载均衡backup 10.4.120.166 负载均衡备份 rtsp1 10.4.120.165 realserverrtsp2 10.4.120.163 realserver
注意要开发云主机域名求：服务器时间要求同步 命令： 修改时间同步配置文件：vi /etc/ntp.conf 增加server10.4.121.166 ##10.4.121.166为时间服务器 启动时间同步服务：service ntpd start ntpd -p 配置 查看主机对表 时间同步问题：错误1.Server dropped: Strata too high 原因：NTP server还没有和其自身或者它的server同步上。 处理：NTP Server 修改/etc/ntp.conf server127.127.1.0
fudge127.127.1.0stratum8 错误2.Server dropped:no data 原因：查ntp server的防火墙 处理：serviceiptablesstop 注意：ntpd 只能进行时间微调，如果服务器相差时间过多，需要使用ntpdate10.4.121.166 调一下，之后启动服务实时微调二、maser 上环境准备1,安装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,下面设置keepalived以服务方式启动设置成为服务并开机启动:cp /usr/local/keepalived/sbin/keepalived /usr/sbin//etc/rc.d/init.d/keepalived statuschkconfig –add keepalivedchkconfig 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|stop3,配置keepalivedvim /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_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 ##主从一致 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 ####换RTSP 在quicktime下测试失败，keepalived不能失败自动剔除切换子例 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 } }}
—-启动 keepalived 后
[root@9data2 keepalived]# ipvsadm -LnIP Virtual Server version 1.2.1 (size=4096)Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConnTCP 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台rtsp服务器10.4.120.165/10.4.120.163上添加如下脚本#vim /etc/init.d/realserver.sh#!/bin/bashSNS_VIP=10.4.127.160. /etc/rc.d/init.d/functionscase “$1” instart)ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP/sbin/route add -host $SNS_VIP dev lo:0echo “1” >/proc/sys/net/ipv4/conf/lo/arp_ignoreecho “2” >/proc/sys/net/ipv4/conf/lo/arp_announceecho “1” >/proc/sys/net/ipv4/conf/all/arp_ignoreecho “2” >/proc/sys/net/ipv4/conf/all/arp_announcesysctl -p >/dev/null 2>&1echo “RealServer Start OK”;;stop)ifconfig lo:0 downroute del $SNS_VIP >/dev/null 2>&1echo “0” >/proc/sys/net/ipv4/conf/lo/arp_ignoreecho “0” >/proc/sys/net/ipv4/conf/lo/arp_announceecho “0” >/proc/sys/net/ipv4/conf/all/arp_ignoreecho “0” >/proc/sys/net/ipv4/conf/all/arp_announceecho “RealServer Stoped”;;*)echo “Usage: $0 {start|stop}”exit 1esacexit 0赋权：#chmod 755 /etc/init.d/realserver.sh#sh /etc/init.d/realserver.sh start

四、Backup注意此处只做master， backup类似操作 只需稍作修改就行问题：Keepalived_vrrp: bogus VRRP packet received on eth0 !!!Keepalived_vrrp: VRRP_Instance(VI_1) ignoring received解决：修改/etc/keepalived/keepalived.conf 中virtual_route_id的值比如 virtual_router_id 60 主从方都要改，默认为51 ，重启keepalived 即可1.lvs_id改为lvs022.state改为BUCKUP3.priority改为100，只要比MASTER小就可以。4、主、从的 virtual_router_id 相同看了以上关于lvs 虚拟负载均衡云服务器总体描述，如果大家还有什么地方需要了解的可以在开发云行业资讯里查找自己感兴趣的或者找我们的专业技术工程师解答的，开发云技术工程师在行业内拥有十几年的经验了。

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