配置方案
主机 地址 角色 虚拟IP
db2 172.16.24.7 master 172.16.24.77
db3 172.16.24.8 master 172.16.24.88
db4 172.16.24.9 slave 172.16.24.99
db1 172.16.24.6 MMM
(注：四台主机都要装上mysql)
一、配置mysql主主复制
1）编辑配置文件（主机172.16.24.7）
[root@localhost ~]# vim /etc/my.cnf
2）编辑配置文件（172.16.24.8)
[root@localhost ~]# vim /etc/my.cnf
3）编辑配置文件（172.16.24.9)
server-id = 3
log-bin=mysql-bin
log-slave-updates
4）编辑配置文件（172.16.24.6)
server-id = 4
log-bin=mysql-bin
log-slave-updates
5)、创建具有复制权限的mysql用户（172.16.24.7、172.16.24.8）
server1 (172.16.24.7)
mysql> grant replication slave on *.* to 'myuser'@'172.16.24.8' identified by 'mypass';
mysql> grant replication slave on *.* to 'myuser'@'172.16.24.9' identified by 'mypass';
mysql> flush privileges;
server2(172.16.24.8)
mysql> grant replication slave on *.* to 'myuser'@'172.16.24.7' identified by 'mypass';
mysql> grant replication slave on *.* to 'myuser'@'172.16.24.9' identified by 'mypass';
mysql> flush privileges;
二、主主复制数据（172.16.24.7、172.16.24.8）
1）同步数据（db3同步db2的数据）
server1:（172.16.24.7）
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 | 346 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
server2:（172.16.24.8）
mysql> change master to MASTER_HOST='172.16.24.7',MASTER_USER='myuser',MASTER_PASSWORD='mypass',MASTER_LOG_FILE='mysql-bin.000003',MASTER_LOG_POS=346;
mysql> start slave;
Query OK, 0 rows affected (0.01 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.16.24.7
Master_User: myuser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 346
Relay_Log_File: localhost-relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
2）同步数据（db2同步db3的数据）
server2:（172.16.24.8）
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 | 505 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
server1:（172.16.24.7）
mysql> change master to MASTER_HOST='172.16.24.8',MASTER_USER='myuser',MASTER_PASSWORD='mypass',MASTER_LOG_FILE='mysql-bin.000003',MASTER_LOG_POS=505;
Query OK, 0 rows affected (0.08 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.16.24.8
Master_User: myuser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 505
Relay_Log_File: localhost-relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
三、安装mysql-mmm及配
1）安装mysql-mmm(四个主要都要安装）
[root@localhost ~]# yum install mysql-mmm*
2)修改配置文件（172.16.24.6）
[root@localhost ~]# vim /etc/mysql-mmm/mmm_common.conf
cluster_interface eth0
pid_path /var/run/mysql-mmm/mmm_agentd.pid
bin_path /usr/libexec/mysql-mmm/
replication_user slave
replication_password slave
agent_user mmm_agent
agent_password mmm_agent
ip 172.16.24.7
mode master
peer db3
ip 172.16.24.8
mode master
peer db2
ip 172.16.24.9
mode slave
hosts db2, db3
ips 172.16.24.77
mode exclusive
hosts db2,db3,db4
ips 172.16.24.77,172.16.24.88,172.16.24.99
mode balanced
3）发送到其它3台主机
[root@localhost mysql-mmm]# scp mmm_common.conf 172.16.24.7:/etc/mysql-mmm/
[root@localhost mysql-mmm]# scp mmm_common.conf 172.16.24.8:/etc/mysql-mmm/
[root@localhost mysql-mmm]# scp mmm_common.conf 172.16.24.9:/etc/mysql-mmm/
4）添加agentd使用的mysql用户,db2，db3，db4都要添加
mysql>grant super,replication client,process on *.* to 'mmm_agent'@'172.16.24.6' identified by 'mmm_agent';
mysql>grant super,replication client,process on *.* to 'mmm_agent'@'172.16.24.7' identified by 'mmm_agent';
mysql>grant super,replication client,process on *.* to 'mmm_agent'@'172.16.24.8' identified by 'mmm_agent';
mysql>grant super,replication client,process on *.* to 'mmm_agent'@'172.16.24.9' identified by 'mmm_agent';
5）修改的/etc/mysql-mmm/mmm_agent.conf 配置文件（四台主机都要改，要跟你的主机名对上）
db2:(172.16.24.7)
[root@localhost ~]# cat /etc/mysql-mmm/mmm_agent.conf
include mmm_common.conf
# The 'this' variable refers to this server. Proper operation requires
# that 'this' server (db1 by default), as well as all other servers, have the
# proper IP addresses set in mmm_common.conf.
this db2
db3:(172.16.24.8)
include mmm_common.conf
# The 'this' variable refers to this server. Proper operation requires
# that 'this' server (db1 by default), as well as all other servers, have the
# proper IP addresses set in mmm_common.conf.
this db3
其它略…………………
6）启动mysql-mmm-agent（172.16.24.7，172.16.24.8，172.16.24.9）
[root@localhost ~]# /etc/init.d/mysql-mmm-agent start
Starting MMM Agent Daemon: [ OK ]
7）启动mysql-mmm-monitor（172.16.24.6）
[root@localhost ~]# /etc/init.d/mysql-mmm-monitor start
Starting MMM Monitor Daemon: [ OK ]
到此配置结束