lvs+keepalived高可用负载均衡

说明： lvs+keepalived-master 172.16.0.111 lvs+keepalived-backup 172.16.0.112 web-1 172.16.0.113 web-2 172.16.0.114 VIP 172.16.0.100 lvs管理工具ipvsadm keepalived-1.3.5.tar.gz

1.查看是否支持lvs

[root@lvs-master ~]# cat /boot/config-2.6.32-573.el6.x86_64 [root@lvs-master ~]# modprobe -l |grep ipvs

2.lvs主备服务器安装keepalived

[root@lvs-master ~]# tar zxvf keepalived-1.3.5.tar.gz [root@lvs-master ~]# cd keepalived-1.3.5 [root@lvs-master keepalived-1.3.5]# ./configure --prefix=/usr/local/keepalived [root@lvs-master keepalived]# make && make install

3.配置keepalived用service命令启动

a.复制/sbin/keepalived到/usr/sbin下

[root@lvs-master ~]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

b.复制sysconfig文件到/etc/sysconfig下

[root@lvs-master ~]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

c.复制启动脚本到/etc/init.d下

[root@lvs-master ~]# cp ~/keepalived-1.3.5/keepalived/etc/init.d/keepalived /etc/init.d/

d.keepalived默认会读取/etc/keepalived/keepalived.conf配置文件

[root@lvs-master ~]# mkdir /etc/keepalived [root@lvs-master ~]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf

4.编辑keepalived配置文件 a.主服务器上如下

[root@lvs-master keepalived-1.3.5]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 192.168.200.1 smtp_connect_timeout 30 router_id LVS_DEVEL vrrp_skip_check_adv_addr vrrp_strict vrrp_garp_interval 0 vrrp_gna_interval 0 } 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 { 172.16.0.100 } } virtual_server 172.16.0.100 80 { delay_loop 6 lb_algo rr lb_kind DR persistence_timeout 50 protocol TCP real_server 172.16.0.113 80 { weight 1 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 } } real_server 172.16.0.114 80 { weight 1 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } }

b.备服务器上配置文件做如下修改

state ------>BACKUP #与MASTER对应 priority ------>90 #小于100

c.启动

[root@lvs-master ~]# service keepalived start [root@lvs-master ~]# chkconfig keepalived on

5.配置web服务器

[root@web-1 init.d]# vim /etc/init.d/realserver #!/bin/bash SNS_VIP=172.16.0.100 /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 [root@web-1 init.d]# chmod 755 realserver [root@web-1 init.d]# service realserver start

6.安装lvs管理工具

[root@lvs-master ~]# yum install ipvsadm [root@lvs-master ~]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 172.16.0.100:80 rr persistent 50 -> 172.16.0.113:80 Route 1 0 0 -> 172.16.0.114:80 Route 1 0 0

7.测试 略

参考链接： http://www.cnblogs.com/edisonchou/p/4281978.html

转载于:https://www.cnblogs.com/fanren224/p/8457243.html