//db1服务器上mmm的过程
IP:192.168.21.190 （为新机，需要安装mysql5.15+mmm）步骤如下：
IP:192.168.21.11 --shengyijie_db 为线上库，mysql的安装路径为：/usr/local/mysql
/data/mysql/data 在这里我们共有如下步骤：
1. 先在新机上安装mysql5.1版本的+mmm (my.cnf配置文件参考192.168.21.11的参数)；
2. 新机导入数据库，配成主主环境；
3. 在原来的线上机上安装mmm，配置新旧mmm主备环境；
4. 测试在6:00以后
成产库的信息：--basedir=/usr/local/mysql
--datadir=/data/mysql/data //安装myslq5.1
tar -xvzf mysql-5.1.51.tar.gz -C /usr/local/src/
cd /usr/local/src/mysql-5.1.51
./configure --prefix=/usr/local/mysql --enable-assembler --with-charset=utf8 --with-collation=utf8_general_ci --with-extra-charsets=all --enable-thread-safe-client --with-big-tables --with-readline --with-ssl --with-embedded-server --enable-local-infile --with-plugins=innobase --with-client-ldflags=-all-static --with-mysqld-ldflags=-all-static --with-plugins=max
//安装ncurses包
yum list|grep ncursesyum -y install ncurses-devel.x86_64
yum install ncurses-devel.x86_64
#########################################
yum install gcc
yum install gcc*//安装Mysql
make&&make install
//修改配置文件
cp /usr/local/mysql/share/mysql/mysql.server /etc/init.d/mysqld
cp /usr/local/mysql/share/mysql/my-large.cnf /etc/my.cnf
cd /usr/local/mysqlgroupadd mysql
useradd -g mysql -s /bin/false -M mysqlchown -R mysql .
chgrp -R mysql .
bin/mysql_install_db --user=mysql --skip-external-locking
bin/mysqld_safe --user=mysql & 修改root用户的密码：root
select user ,password ,host from user WHERE User = 'root' ; UPDATE user SET Password = password ( 'redhat' ) WHERE User = 'root' ;
flush privileges ;
//添加路径
export PATH=$PATH:/usr/local/mysql/bin/#vi ~/.bash_profile
修改PATH行,把/usr/local/mysql/bin添加进去
如：PATH=/usr/local/mysql/bin:$PATH:$HOME/bin //修改字符集问题
mysql> show variables like 'collation_%';
mysql> show variables like 'character_set_%';检查后发现都是utf8；
2. 主主搭建
IP:192.168.21.11
[root@localhost ~]# vi /etc/my.cnf
log-bin=mysql-bin
server-id =1
replicate-ignore-db=mysql
replicate-ignore-db=information_schema
slave-skip-errors=all
sync_binlog=1
auto_increment_increment=2
auto_increment_offset=1IP:192.168.21.190
log-bin=mysql-bin
server-id =2
replicate-ignore-db=mysql
replicate-ignore-db=information_schema
log-slave-updates
slave-skip-errors=all
sync_binlog=1
auto_increment_increment=2
auto_increment_offset=2然后分别重启两个mysqld的服务。
2. 授权用户
IP：192.168.21.11/190
mysql> grant replication slave,file on *.* to 'rep'@192.168.21.190 identified by 'root@centos';
Query OK, 0 rows affected (0.00 sec)mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)mysql> change master to master_host='192.168.21.190', master_user='rep', master_password='root@centos';
Query OK, 0 rows affected (0.01 sec)
IP： 10.200.1.8
mysql> grant replication slave,file on *.* to 'rep'@'192.168.21.11' identified by 'root@centos';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)mysql> change master to master_host='192.168.21.11', master_user='rep', master_password='root@centos';
导入数据后，实现主主同步：（先吧线上库同步到新库，然后再实现新库与线上库的同步）
//在192.168.21.11上同步到190上
change master to master_host='192.168.21.190',master_user='rep',master_password='root@centos', master_log_file='mysql-bin.000012', master_log_pos=106;
//在192.168.21.190上同步到11上
change master to master_host='192.168.21.11',master_user='rep',master_password='root@centos', master_log_file='mysql-bin.000134', master_log_pos=4; 3. 安装搭建MMM步骤：
环境准备：
db1 IP: 192.168.21.11
db2 IP: 192.168.21.190
monitor IP: 192.168.21.191其中db1与db2为主主同步
1. 在db1、db2、monitor上安装MMM
wget http://centos.ustc.edu.cn/epel/6/x86_64/epel-release-6-7.noarch.rpm rpm -Uvh epel-release-6-7.noarch.rpm
yum install munin
yum -y install mysql-mmm* 2. 配置mmm代理和监控账号的权限
在db1，db2上分别执行：
GRANT REPLICATION CLIENT ON *.* TO 'mmm_monitor'@'192.168.21.%' IDENTIFIED BY '123456';
GRANT SUPER, REPLICATION CLIENT, PROCESS ON *.* TO 'mmm_agent'@'192.168.21.%' IDENTIFIED BY '123456';
flush privileges;复制代码
防火墙开3306和9989端口
测试阶段先关闭防火墙： service iptables stop3. 配置mysql-mmm
所有的配置选项都集合在了一个叫/etc/mysql-mmm/mmm_common.conf的单独文件中，系统中所有主机的该文件内容都是一样的, 配置完后不要忘记了拷贝这个文件到所有的主机（包括监控主机）！，内容如下：
active_master_role writer<host default>
cluster_interface eth0
pid_path /var/run/mysql-mmm/mmm_agentd.pid
bin_path /usr/libexec/mysql-mmm/
#同步的帐号（这些要和前面设置的保持一致！）
replication_user rep
replication_password root@centos #同步的密码
agent_user mmm_agent #mmm-agent用户名
agent_password 123456 #mmm-agent用户密码
</host><host db1>
ip 192.168.21.11 #db1的ip
mode master
peer db2
</host><host db2>
ip 192.168.21.190 #db2的ip
mode master
peer db1
</host><role writer>
hosts db1, db2
ips 192.168.21.191 #设置写入的虚拟IP
mode exclusive
</role><role reader>
hosts db1, db2
ips 192.168.21.191 #设置读取的虚拟IP
mode exclusive</role>
复制代码4. 在各个数据库主机上我们需要编辑/etc/mysql-mmm/mmm_agent.conf文件，根据其他主机的不同更改db1的值（db2就将db1更改成db2…….）：
include mmm_common.conf
this db15. 在监控主机上我们需要编辑/etc/mysql-mmm/mmm_mon.conf文件：
include mmm_common.conf<monitor>
ip 127.0.0.1
pid_path /var/run/mysql-mmm/mmm_mond.pid
bin_path /usr/libexec/mysql-mmm
status_path /var/lib/mysql-mmm/mmm_mond.status
ping_ips 192.168.21.11,192.168.21.190 #监控服务器ip
auto_set_online 10 # The kill_host_bin does not exist by default, though the monitor will
# throw a warning about it missing. See the section 5.10 "Kill Host
# Functionality" in the PDF documentation.
#
# kill_host_bin /usr/libexec/mysql-mmm/monitor/kill_host
#
</monitor><host default>
monitor_user mmm_monitor #mmm_monitor用户名
monitor_password 123456 #mmm_monitor密码
</host>debug 0
复制代码6. 启动MMM
启动代理：（在数据库服务器上server1、2）编辑/etc/default/mysql-mmm-agent
[root@localhost mysql-mmm]# vi /etc/default/mysql-mmm-agent
来开启：
ENABLED=1
复制代码
7. 关闭防火墙
service iptables stop;8. 启动agent：
/etc/init.d/mysql-mmm-agent start
添加到服务里面代码如下：
1. #cd /etc/init.d/
2. #chkconfig mysql-mmm-agent on
3. #service mysql-mmm-agent start 注意：不在一个网段上的一定要 给monitor相关用户授权。
9. 启动监控（在监控机上）
/etc/init.d/mysql-mmm-monitor start10. 利用mmm_control监控mysql服务器状态：
[root@localhost init.d]# mmm_control show 0
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