分别在 realserver 上执行以下命令
vi /etc/sysctl.conf
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.lo.arp_announce = 2
sysctl -p
ifconfig eth0:0 192.168.0.200 netmask 255.255.255.255 up
route add -host 192.168.0.200 dev eth0:0
vi /etc/rc.local
ifconfig eth0:0 192.168.0.200 netmask 255.255.255.255 up
route add -host 192.168.0.200 dev eth0:0
echo `hostname` > /var/www/html/index.html
service httpd start
测试:
访问 ,看到页面在两个 realserver 上切换表示成功!
你也可以通过 ipvsadm -Lnc 查看详细连接情况!
-------------------------------------------------------------------------------------------------------------------
二、mysql服务器
-------------------------------------------------------------------------------------------------------------------
mysql双主高可用
-------------------------------------
系统环境：
RHEL6.0_I386
VIP 192.168.0.51
real server1 192.167.0.7
real server2 192.168.0.8
-------------------------------------
1.server1和server2安装好mysql并修改配置文件：
yum install mysql-server
vi /etc/my.cnf:
[mysqld]
log-bin=MySQL-bin
server-id=1 ##在server2上配置为server-id=2
-------------------------------------
2.server1和server2相互设置为主从同步，（双主）.
server1:
mysql> grant replication slave on *.* to 'cluster'@'%' identified by 'cluster';
mysql> show master status;
-------------------------
MySQL-bin.000001 236
-------------------------
------------------------------------
server2:
mysql> change master to
-> master_host='192.168.0.7',
-> master_user='cluster',
-> master_password='cluster',
-> master_log_file='MySQL-bin.000001',
-> master_log_pos=236;
mysql> start slave;
mysql> show slave status;
在server2和server1上执行相反的操作，使其互为主从.
--------------------------------------
3.安装软件包
yum install gcc popt-devel kernel-devel openssl-devel ipvsadm make
tar xf keepalived-***.tar.gz
cd keepalived-*
./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.32-71.el6.i686
make && make install
modprobe ip_vs #此处如果系统没有自动加载此模块将导致keepalived启动后无法找到lvs负载均衡协议
mkdir /etc/keepalived/
ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
ln -s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
ln -s /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
ln -s /usr/local/keepalived/bin/* /bin/
ln -s /usr/local/keepalived/sbin/* /sbin/
---------------------------------------------------
4.修改server1/server2配置文件
server1:
vi /etc/keepalived/keepalived.conf:
! Configuration File for keepalived
global_defs {
notification_email {
root@example.com
}
notification_email_from root@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id MYSQL-HA ##确保和server2相同
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51 ##确保和server2相同，同网内不同集群此项必须不同,否则发生冲突
priority 100 ##此处server2上设置为50
advert_int 1
nopreempt ##不抢占，只在priority高的server1上设置，server2上此项注释掉
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.51
}
}
virtual_server 192.168.0.51 3306 {
delay_loop 2
lb_algo wrr
lb_kind DR
persistence_timeout 60
protocol TCP
real_server 192.168.0.7 3306 {
##server2上此处改为192.168.0.8(即server2本机ip)
weight 3
notify_down /usr/local/keepalived/bin/mysql.sh
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}
--------------------------------
server1和server2上都添加此检测脚本，作用是当mysql停止工作时自动关闭本机的keepalived
从而实现将故障机器踢出（因每台机器上keepalived只添加了本机为realserver）.
vi /usr/local/keepalived/bin/mysql.sh:
#!/bin/sh
pkill keepalived
--------------------------------
vi /etc/rc.local:
modprobe ip_vs ##此模块如果无法自动加载则需手动加载
--------------------------------
server1和server2启动keepalived守护进程.
/etc/init.d/keepalived start