REDHAT6.2 X86_64下安装基于keepalive的msyql主主复制
一 初始化配置
本配置共有两个测试节点，分别是node1.ewt.cc和node2.ewt.cc，相对应的IP地址分别为
1）192.168.2.71和192.168.2.72
集群服务为mysql服务
集群VIP：192.168.2.200
设置两个节点上的/etc/hosts文件均为下面的内容
192.168.2.71 node1.ewt.cc node1
192.168.2.72 node2.ewt.cc node2
2）为了方便两个主机的文件对拷，配置双机互信访问,设定两个节点可以基于密钥进行ssh通信，这可以通过如下的命令实现：
在node1上
# ssh-keygen -t rsa #一直输入空格
# ssh-copy-id -i /root/.ssh/id_rsa.pub node2
在node2上
# ssh-keygen -t rsa #一直输入空格
#ssh-copy-id -i /root/.ssh/id_rsa.pub node1
3）为了测试方便，通过如下命令在两个节点都关闭iptables
service iptables stop
使它开机也不自启动：chkconfig –level 2345 iptables off
4）本地yum源配置
[root@node2 yum.repos.d]# cat /etc/yum.repos.d/local.repo
[local]
name=local
baseurl=file:///iso
enable=1
gpgcheck=0
5) 安装mysql
yum –y install mysql mysql-bench mysql-bench mysql-server mysql-test libtool-ltdl perl-DBD-MySQL perl-DBI
二 主从单向复制配置
*先把node1配置成node2的主
（一）node1上面配置
1 /etc/my.cmf文件如下，在默认的文件里面增加如下参数：
log-bin=mysql.bin
server-id=1
relay-log=relay.bin
sync-binlog=1
auto_increment_offet=1
auto_increment_increment=2
2 mysql命令行下面：
mysql>grant replication client,replication slave on *.* to 'node2'@'192.168.2.72' identified by 'node2';
mysql> flush privileges;
3 mysql> show master status;
+--------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+--------------+----------+--------------+------------------+
| mysql.00005| 106 | | |
+--------------+----------+--------------+------------------+
1 row in set (0.00 sec)
（二）node2上面配置
1 /etc/my.cmf文件如下，在默认的文件里面增加如下参数：
log-bin=mysql.bin
server-id=2
relay-log=relay.bin
sync-binlog=1
auto_increment_offet=2 #用来设定数据库中自动增长的起点的
auto_increment_increment=2 #用来设定数据库中自动增长的步长
2 mysql> change master to master_host='192.168.2.71',master_user='node2', master_password='node2',master_log_file='mysql.000005',master_log_pos=106,master_port=3306;
mysql> slave start;
（三）主从复制验证略
三 主主双向复制配置
（一） Node2上面配置
1 mysql>grant replication client,replication slave on *.* to 'node1'@'192.168.2.71' identified by 'node1';
2 mysql> flush privileges;
3 mysql> show master status;
+--------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+--------------+----------+--------------+------------------+
| mysql.000004 | 517 | | |
+--------------+----------+--------------+------------------+
（二） Node1上面配置
1 mysql> change master to master_host='192.168.2.72', master_user='node1', master_password='node1', master_log_file='mysql.000004', master_log_pos=517, master_port=3306;
2 mysql> slave start;
（三） 主主双向复制验证略
四 安装keepalive
(一) 下载 wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz
（二）解压 tar zxvf keepalived-1.2.7.tar.gz
（三） 检查编译环境和配置makefile
./configure --sysconfdir=/etc --prefix=/usr/local/keepalive --with-kernel-dir=/usr/src/kernels/2.6.32-220.el6.x86_64/
出现报错：
configure: error: Popt libraries is required
用yum install popt-devel –y解决之
（四）编译&安装
make &&mak insall
（五）修改配置文件如下
1 在node1上面 vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id mysql-ha
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.200
}
}
virtual_server 192.168.2.200 3306 {
delay_loop 6
lb_algo wrr
lb_kind DR
# nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 192.168.2.71 3306 {
weight 1
notify_down /usr/local/mysql/bin/mysqltest.sh
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}
2 编写检测服务down后所要执行的脚本
mkdir –p /usr/local/mysql/bin
cd /usr/local/mysql/bin
vi mysqltest.sh
#!/bin/bash
pkill keepalived
保存退出
最后chmod +x mysqtest.sh
3 简单测试
找一台局域网PC，然后去ping MySQL的VIP，这时候MySQL的VIP是可以ping得通的
停止MySQL服务，看keepalived健康检查程序是否会触发我们编写的脚本，正确的话，keepalived进程被杀死，PING过程会中断。
4在node1上面 vi /etc/keepalived/keepalived.conf
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id mysql-ha
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 90
advert_int 1
# nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.200
}
}
virtual_server 192.168.2.200 3306 {
delay_loop 6
lb_algo wrr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 192.168.2.72 3306 {
weight 1
notify_down /usr/local/mysql/bin/mysqltest.sh
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}
5编写检测服务down后所要执行的脚本
mkdir –p /usr/local/mysql/bin
cd /usr/local/mysql/bin
vi mysqltest.sh
#!/bin/bash
pkill keepalived
保存退出
最后chmod +x mysqtest.sh
四 最终测试
MySQL远程登录测试
我们找一台安装有MySQL客户端的windows，然后登录VIP，看是否能登录，在登录前两台MySQL服务器都要授权允许从远程登录
MySQL> grant all privileges on *.* to 'root'@'%' identified by '123456';
Query OK, 0 rows affected (0.00 sec)
MySQL> flush privileges;
Query OK, 0 rows affected (0.00 sec)
使用客户端登录VIP测试
C:\MySQL\bin>MySQL.exe -uroot -p123456 -h192.168.2.200
MySQL>
● keepalived故障转移测试
※在windows客户端一直去ping VIP，然后关闭192.168.2.71上的keepalived，正常情况下VIP就会切换到192.168.2.72上面去
※开启192.168.2.71上的keepalived，关闭192.168.2.72上的keepalived，看是否能自动切换，正常情况下VIP又会属于192.168.2.71
注：keepalived切换速度还是非常块的，整个切换过程只需1-3秒
● MySQL故障转移测试
※在192.168.2.71上关闭MySQL服务，看VIP是否会切换到192.168.2.72上
※开启192.168.2.71上的MySQL和keepalived，然后关闭192.168.2.72上的MySQL，看VIP是否会切换到192.168.2.71上
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