MariaDB 10 (MySQL DB) 多主复制并实现读写分离_MySQL

MariaDB

二、资源配置

• 主机属性

系统	名字	角色	主机名	ip地址	关系
Centos6.5x86_64	DB1	Master	essun.mariadb1.com	192.168.1.109	与DB2互为主从
Centos6.5x86_64	DB2	Master	essun.mariadb2.com	192.168.1.112	与DB1互为主从
Centos6.5x86_64	DB3	Slave	essun.mariadb3.com	192.168.1.113	DB1的从库
Centos6.5x86_64	Monitor	Monitor	essun.monitor.com	192.168.1.116	监控所有主机

• 虚拟ip(VIP)

DB1    192.168.1.109   192.168.1.24

DB2    192.168.1.112    192.168.1.24,192.168.1.22

DB3    192.168.1.113    192.168.1.23

三、拓扑图

四、实现过程

1、配置DB1

修改配置文件/etc/my.cnf,添加如下语句

server-<span style="COLOR: rgb(0,0,255)">id</span>=<span style="COLOR: rgb(128,0,128)">1</span><span style="COLOR: rgb(0,0,0)">log_bin</span>=/mariadb/data/mysql-<span style="COLOR: rgb(0,0,0)">binbinlog_format</span>=<span style="COLOR: rgb(0,0,0)">rowlog</span>-slave-<span style="COLOR: rgb(0,0,0)">updates sync_binlog</span>=<span style="COLOR: rgb(128,0,128)">1</span><span style="COLOR: rgb(0,0,0)">auto_increment_increment</span>=<span style="COLOR: rgb(128,0,128)">2# <span>默认地，AUTO_INCREMENT 的开始值是 1，每条新记录递增 1。</span></span><span style="COLOR: rgb(0,0,0)">auto_increment_offset</span>=<span style="COLOR: rgb(128,0,128)">1 </span>

授权用户

MariaDB [(none)]> grant replication slave,replication client on *.* to <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">repluser</span><span style="COLOR: rgb(128,0,0)">'</span>@<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">192.168.1.112</span><span style="COLOR: rgb(128,0,0)">'</span> identified by <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">replpass</span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(0,0,0)">;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.12</span><span style="COLOR: rgb(0,0,0)"> sec)MariaDB [(none)]</span>> grant replication slave,replication client on *.* to <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">repluser</span><span style="COLOR: rgb(128,0,0)">'</span>@<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">192.168.1.113</span><span style="COLOR: rgb(128,0,0)">'</span> identified by <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">replpass</span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(0,0,0)">;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.00</span> sec)

查看binlog日志标记

MariaDB [(none)]><span style="COLOR: rgb(0,0,0)"> show master status;</span>+------------------+----------+--------------+------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |+------------------+----------+--------------+------------------+| mysql-bin.<span style="COLOR: rgb(128,0,128)">000003</span> |<span style="COLOR: rgb(128,0,128)">756</span> |||+------------------+----------+--------------+------------------+<span style="COLOR: rgb(128,0,128)">1</span> row <span style="COLOR: rgb(0,0,255)">in</span> set (<span style="COLOR: rgb(128,0,128)">0.00</span> sec)

2、配置DB2

修改配置文件/etc/my.cnf,添加如下语句

log-bin=mysql-<span style="COLOR: rgb(0,0,0)">binbinlog_format</span>=<span style="COLOR: rgb(0,0,0)">ROWlog</span>-slave-<span style="COLOR: rgb(0,0,0)">updatessync_binlog</span>=<span style="COLOR: rgb(128,0,128)">1</span><span style="COLOR: rgb(0,0,0)">auto_increment_increment</span>=<span style="COLOR: rgb(128,0,128)">2</span><span style="COLOR: rgb(0,0,0)">auto_increment_offset</span>=<span style="COLOR: rgb(128,0,128)">2</span><span style="COLOR: rgb(0,0,0)">server</span>-<span style="COLOR: rgb(0,0,255)">id</span>=<span style="COLOR: rgb(128,0,128)">2</span>

授权用户

MariaDB [(none)]> grant replication slave,replication client on *.* to <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">repluser</span><span style="COLOR: rgb(128,0,0)">'</span>@<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">192.168.1.109</span><span style="COLOR: rgb(128,0,0)">'</span> identified by <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">replpass</span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(0,0,0)">;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.15</span> sec)

查看binlog日志标记

MariaDB [(none)]><span style="COLOR: rgb(0,0,0)"> show master status;</span>+------------------+----------+--------------+------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |+------------------+----------+--------------+------------------+| mysql-bin.<span style="COLOR: rgb(128,0,128)">000007</span> |<span style="COLOR: rgb(128,0,128)">548</span> |||+------------------+----------+--------------+------------------+<span style="COLOR: rgb(128,0,128)">1</span> row <span style="COLOR: rgb(0,0,255)">in</span> set (<span style="COLOR: rgb(128,0,128)">0.00</span> sec)

连接DB1

MariaDB [(none)]><span style="COLOR: rgb(0,0,0)"> show master status;</span>+------------------+----------+--------------+------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |+------------------+----------+--------------+------------------+| mysql-bin.<span style="COLOR: rgb(128,0,128)">000007</span> |<span style="COLOR: rgb(128,0,128)">548</span> |||+------------------+----------+--------------+------------------+<span style="COLOR: rgb(128,0,128)">1</span> row <span style="COLOR: rgb(0,0,255)">in</span> set (<span style="COLOR: rgb(128,0,128)">0.00</span> sec)

3、配置DB3

修改配置文件/etc/my.cnf添加如下语句

server-<span style="COLOR: rgb(0,0,255)">id</span>=<span style="COLOR: rgb(128,0,128)">3</span><span style="COLOR: rgb(0,0,0)">log</span>-bin=mysql-<span style="COLOR: rgb(0,0,0)">binlog</span>-slave-<span style="COLOR: rgb(0,0,0)">updates<br></span><span>relay</span>-log=relay-log-bin

连接DB1

MariaDB [(none)]> change master to master_host=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">192.168.1.109</span><span style="COLOR: rgb(128,0,0)">'</span>,master_user=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">repluser</span><span style="COLOR: rgb(128,0,0)">'</span>,master_password=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">replpass</span><span style="COLOR: rgb(128,0,0)">'</span>,master_log_file=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">mysql-bin.000003</span><span style="COLOR: rgb(128,0,0)">'</span>,master_log_pos=<span style="COLOR: rgb(128,0,128)">756</span><span style="COLOR: rgb(0,0,0)">;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.03</span><span style="COLOR: rgb(0,0,0)"> sec)MariaDB [(none)]</span>><span style="COLOR: rgb(0,0,0)"> start slave;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.00</span><span style="COLOR: rgb(0,0,0)"> sec)MariaDB [(none)]</span>><span style="COLOR: rgb(0,0,0)"> show slave status/G</span>*************************** <span style="COLOR: rgb(128,0,128)">1</span>. row ***************************<span style="COLOR: rgb(0,0,0)"> Slave_IO_State: Waiting </span><span style="COLOR: rgb(0,0,255)">for</span><span style="COLOR: rgb(0,0,0)"> master to send eventMaster_Host: </span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.109</span><span style="COLOR: rgb(0,0,0)">Master_User: repluserMaster_Port: </span><span style="COLOR: rgb(128,0,128)">3306</span><span style="COLOR: rgb(0,0,0)">Connect_Retry: </span><span style="COLOR: rgb(128,0,128)">60</span><span style="COLOR: rgb(0,0,0)">Master_Log_File: mysql</span>-bin.<span style="COLOR: rgb(128,0,128)">000003</span><span style="COLOR: rgb(0,0,0)">Read_Master_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">756</span><span style="COLOR: rgb(0,0,0)"> Relay_Log_File: relay</span>-log-bin.<span style="COLOR: rgb(128,0,128)">000002</span><span style="COLOR: rgb(0,0,0)">Relay_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">535</span><span style="COLOR: rgb(0,0,0)">Relay_Master_Log_File: mysql</span>-bin.<span style="COLOR: rgb(128,0,128)">000003</span><span style="COLOR: rgb(0,0,0)"> Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB:Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table:Replicate_Wild_Do_Table:Replicate_Wild_Ignore_Table: Last_Errno: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)"> Last_Error: Skip_Counter: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)">Exec_Master_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">756</span><span style="COLOR: rgb(0,0,0)">Relay_Log_Space: </span><span style="COLOR: rgb(128,0,128)">830</span><span style="COLOR: rgb(0,0,0)">Until_Condition: None Until_Log_File:Until_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)"> Master_SSL_Allowed: Yes Master_SSL_CA_File: </span>/etc/slave/<span style="COLOR: rgb(0,0,0)">cacert.pem Master_SSL_CA_Path:Master_SSL_Cert: </span>/etc/slave/<span style="COLOR: rgb(0,0,0)">mysql.crtMaster_SSL_Cipher: Master_SSL_Key: </span>/etc/slave/<span style="COLOR: rgb(0,0,0)">mysql.keySeconds_Behind_Master: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)">Master_SSL_Verify_Server_Cert: NoLast_IO_Errno: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)">Last_IO_Error: Last_SQL_Errno: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)"> Last_SQL_Error:Replicate_Ignore_Server_Ids: Master_Server_Id: </span><span style="COLOR: rgb(128,0,128)">1</span><span style="COLOR: rgb(0,0,0)"> Master_SSL_Crl: </span>/etc/slave/<span style="COLOR: rgb(0,0,0)">cacert.pem Master_SSL_Crlpath: Using_Gtid: NoGtid_IO_Pos:</span><span style="COLOR: rgb(128,0,128)">1</span> row <span style="COLOR: rgb(0,0,255)">in</span> set (<span style="COLOR: rgb(128,0,128)">0.00</span> sec)<span style="FONT-SIZE: 14px; FONT-FAMILY: verdana, Arial, Helvetica, sans-serif; LINE-HEIGHT: 1.5; BACKGROUND-COLOR: rgb(255,255,255)"> </span>

DB1连接DB2

MariaDB [(none)]> change master to master_host=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">192.168.1.112</span><span style="COLOR: rgb(128,0,0)">'</span>,master_user=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">repluser</span><span style="COLOR: rgb(128,0,0)">'</span>,master_password=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">replpass</span><span style="COLOR: rgb(128,0,0)">'</span>,master_log_file=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">mysql-bin.000007</span><span style="COLOR: rgb(128,0,0)">'</span>,master_log_pos=<span style="COLOR: rgb(128,0,128)">548</span><span style="COLOR: rgb(0,0,0)">;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.03</span><span style="COLOR: rgb(0,0,0)"> sec)MariaDB [(none)]</span>><span style="COLOR: rgb(0,0,0)"> start slave;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.00</span><span style="COLOR: rgb(0,0,0)"> sec)MariaDB [(none)]</span>><span style="COLOR: rgb(0,0,0)"> show slave status/G</span>*************************** <span style="COLOR: rgb(128,0,128)">1</span>. row ***************************<span style="COLOR: rgb(0,0,0)"> Slave_IO_State: Waiting </span><span style="COLOR: rgb(0,0,255)">for</span><span style="COLOR: rgb(0,0,0)"> master to send eventMaster_Host: </span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.112</span><span style="COLOR: rgb(0,0,0)">Master_User: repluserMaster_Port: </span><span style="COLOR: rgb(128,0,128)">3306</span><span style="COLOR: rgb(0,0,0)">Connect_Retry: </span><span style="COLOR: rgb(128,0,128)">60</span><span style="COLOR: rgb(0,0,0)">Master_Log_File: mysql</span>-bin.<span style="COLOR: rgb(128,0,128)">000007</span><span style="COLOR: rgb(0,0,0)">Read_Master_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">548</span><span style="COLOR: rgb(0,0,0)"> Relay_Log_File: essun</span>-relay-bin.<span style="COLOR: rgb(128,0,128)">000002</span><span style="COLOR: rgb(0,0,0)">Relay_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">535</span><span style="COLOR: rgb(0,0,0)">Relay_Master_Log_File: mysql</span>-bin.<span style="COLOR: rgb(128,0,128)">000007</span><span style="COLOR: rgb(0,0,0)"> Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB:Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table:Replicate_Wild_Do_Table:Replicate_Wild_Ignore_Table: Last_Errno: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)"> Last_Error: Skip_Counter: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)">Exec_Master_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">548</span><span style="COLOR: rgb(0,0,0)">Relay_Log_Space: </span><span style="COLOR: rgb(128,0,128)">832</span><span style="COLOR: rgb(0,0,0)">Until_Condition: None Until_Log_File:Until_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)"> Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path:Master_SSL_Cert:Master_SSL_Cipher: Master_SSL_Key:Seconds_Behind_Master: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)">Master_SSL_Verify_Server_Cert: NoLast_IO_Errno: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)">Last_IO_Error: Last_SQL_Errno: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)"> Last_SQL_Error:Replicate_Ignore_Server_Ids: Master_Server_Id: </span><span style="COLOR: rgb(128,0,128)">2</span><span style="COLOR: rgb(0,0,0)"> Master_SSL_Crl: Master_SSL_Crlpath: Using_Gtid: NoGtid_IO_Pos:</span><span style="COLOR: rgb(128,0,128)">1</span> row <span style="COLOR: rgb(0,0,255)">in</span> set (<span style="COLOR: rgb(128,0,128)">0.00</span> sec)

4、测试

在DB2中建立一个数据库testdb

MariaDB [(none)]> change master to master_host=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">192.168.1.112</span><span style="COLOR: rgb(128,0,0)">'</span>,master_user=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">repluser</span><span style="COLOR: rgb(128,0,0)">'</span>,master_password=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">replpass</span><span style="COLOR: rgb(128,0,0)">'</span>,master_log_file=<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">mysql-bin.000007</span><span style="COLOR: rgb(128,0,0)">'</span>,master_log_pos=<span style="COLOR: rgb(128,0,128)">548</span><span style="COLOR: rgb(0,0,0)">;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.03</span><span style="COLOR: rgb(0,0,0)"> sec)MariaDB [(none)]</span>><span style="COLOR: rgb(0,0,0)"> start slave;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.00</span><span style="COLOR: rgb(0,0,0)"> sec)MariaDB [(none)]</span>><span style="COLOR: rgb(0,0,0)"> show slave status/G</span>*************************** <span style="COLOR: rgb(128,0,128)">1</span>. row ***************************<span style="COLOR: rgb(0,0,0)"> Slave_IO_State: Waiting </span><span style="COLOR: rgb(0,0,255)">for</span><span style="COLOR: rgb(0,0,0)"> master to send eventMaster_Host: </span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.112</span><span style="COLOR: rgb(0,0,0)">Master_User: repluserMaster_Port: </span><span style="COLOR: rgb(128,0,128)">3306</span><span style="COLOR: rgb(0,0,0)">Connect_Retry: </span><span style="COLOR: rgb(128,0,128)">60</span><span style="COLOR: rgb(0,0,0)">Master_Log_File: mysql</span>-bin.<span style="COLOR: rgb(128,0,128)">000007</span><span style="COLOR: rgb(0,0,0)">Read_Master_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">548</span><span style="COLOR: rgb(0,0,0)"> Relay_Log_File: essun</span>-relay-bin.<span style="COLOR: rgb(128,0,128)">000002</span><span style="COLOR: rgb(0,0,0)">Relay_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">535</span><span style="COLOR: rgb(0,0,0)">Relay_Master_Log_File: mysql</span>-bin.<span style="COLOR: rgb(128,0,128)">000007</span><span style="COLOR: rgb(0,0,0)"> Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB:Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table:Replicate_Wild_Do_Table:Replicate_Wild_Ignore_Table: Last_Errno: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)"> Last_Error: Skip_Counter: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)">Exec_Master_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">548</span><span style="COLOR: rgb(0,0,0)">Relay_Log_Space: </span><span style="COLOR: rgb(128,0,128)">832</span><span style="COLOR: rgb(0,0,0)">Until_Condition: None Until_Log_File:Until_Log_Pos: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)"> Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path:Master_SSL_Cert:Master_SSL_Cipher: Master_SSL_Key:Seconds_Behind_Master: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)">Master_SSL_Verify_Server_Cert: NoLast_IO_Errno: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)">Last_IO_Error: Last_SQL_Errno: </span><span style="COLOR: rgb(128,0,128)">0</span><span style="COLOR: rgb(0,0,0)"> Last_SQL_Error:Replicate_Ignore_Server_Ids: Master_Server_Id: </span><span style="COLOR: rgb(128,0,128)">2</span><span style="COLOR: rgb(0,0,0)"> Master_SSL_Crl: Master_SSL_Crlpath: Using_Gtid: NoGtid_IO_Pos:</span><span style="COLOR: rgb(128,0,128)">1</span> row <span style="COLOR: rgb(0,0,255)">in</span> set (<span style="COLOR: rgb(128,0,128)">0.00</span> sec)

在DB1中对testdb，插入一条数据

MariaDB [testdb]> insert t1 values (<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">tom</span><span style="COLOR: rgb(128,0,0)">'</span>,<span style="COLOR: rgb(128,0,128)">24</span><span style="COLOR: rgb(0,0,0)">);Query OK, </span><span style="COLOR: rgb(128,0,128)">1</span> row affected (<span style="COLOR: rgb(128,0,128)">0.01</span> sec)

 在DB3中查看结果

MariaDB [(none)]> <span style="COLOR: rgb(0,0,255)">select</span> *<span style="COLOR: rgb(0,0,0)"> from testdb.t1;</span>+------+-----+| name | age |+------+-----+| tom|<span style="COLOR: rgb(128,0,128)">24</span> || king |<span style="COLOR: rgb(128,0,128)">24</span> |+------+-----+<span style="COLOR: rgb(128,0,128)">2</span> rows <span style="COLOR: rgb(0,0,255)">in</span> set (<span style="COLOR: rgb(128,0,128)">0.00</span><span style="COLOR: rgb(0,0,0)"> sec)MariaDB [(none)]</span>>

OK！三台DB的主从配置正常工作

在DB1~3上安装mysql-mmmo-agent

注：mysql-mmm-agent是在epel源中，所以要下载EPEL源安装包即可http://download.fedoraproject.org/pub/epel/6/i386/repoview/epel-release.html

下载对应的版本就可以的。

#rpm -ivh epel-release-<span style="COLOR: rgb(128,0,128)">6</span>-<span style="COLOR: rgb(128,0,128)">8</span><span style="COLOR: rgb(0,0,0)">.noarch.rpm</span><span style="COLOR: rgb(0,0,255)">yum</span> -y <span style="COLOR: rgb(0,0,255)">install</span> mysql-mmm-agent

每一个节点都要安装

在每一个节点上要给Monitor授权用户

MariaDB [(none)]> GRANT SUPER, REPLICATION CLIENT, PROCESS ON *.* TO <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">mmm_agent</span><span style="COLOR: rgb(128,0,0)">'</span>@<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">192.168.1.116</span><span style="COLOR: rgb(128,0,0)">'</span> IDENTIFIED BY <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">123456</span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(0,0,0)">;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.01</span><span style="COLOR: rgb(0,0,0)"> sec)MariaDB [(none)]</span>> GRANT REPLICATION CLIENT ON *.* TO <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">mmm_monitor</span><span style="COLOR: rgb(128,0,0)">'</span>@<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">192.168.1.116</span><span style="COLOR: rgb(128,0,0)">'</span> IDENTIFIED BY <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">123456</span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(0,0,0)">;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.01</span><span style="COLOR: rgb(0,0,0)"> sec)MariaDB [(none)]</span>> GRANT REPLICATION CLIENT ON *.* TO <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">repluser</span><span style="COLOR: rgb(128,0,0)">'</span>@<span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">192.168.1.116</span><span style="COLOR: rgb(128,0,0)">'</span> IDENTIFIED BY <span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">replpass</span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(0,0,0)">;Query OK, </span><span style="COLOR: rgb(128,0,128)">0</span> rows affected (<span style="COLOR: rgb(128,0,128)">0.01</span> sec)

6、在Monitor节点上要安装

#<span style="COLOR: rgb(0,0,255)">yum</span> -y <span style="COLOR: rgb(0,0,255)">install</span> mysql-mmm*

此包同样也在epel源中

7、在Monitor端的设置/etc/mysql-mmm/mmm_common.conf

<span style="COLOR: rgb(0,0,0)">active_master_role	writer</span><host default><span style="COLOR: rgb(0,0,0)">	cluster_interface	 eth0	pid_path				</span>/var/run/mysql-mmm/<span style="COLOR: rgb(0,0,0)">mmm_agentd.pid	bin_path				</span>/usr/libexec/mysql-mmm/<span style="COLOR: rgb(0,0,0)">	replication_user		repluser #复制用户	replication_password	replpass #复制密码	agent_user			mmm_agent #代理用户	agent_password		</span><span style="COLOR: rgb(128,0,128)">123456</span><span style="COLOR: rgb(0,0,0)"> #代理用户的密码</span></host><host db1><span style="COLOR: rgb(0,0,0)">	ip	</span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.109</span><span style="COLOR: rgb(0,0,0)">	mode	master	peer	db2</span></host><host db2><span style="COLOR: rgb(0,0,0)">	ip	</span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.112</span><span style="COLOR: rgb(0,0,0)">	mode	master	peer	db1</span></host>																															 <host db3><span style="COLOR: rgb(0,0,0)">	ip	</span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.113</span><span style="COLOR: rgb(0,0,0)">	mode	slave</span></host><role writer><span style="COLOR: rgb(0,0,0)">	hosts db1, db2	ips	 </span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.24</span><span style="COLOR: rgb(0,0,0)">	mode	exclusive #排它</span></role>	<role reader><span style="COLOR: rgb(0,0,0)">	hosts	db2, db3	ips	</span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.22</span>, <span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.23</span><span style="COLOR: rgb(0,0,0)">	mode	balanced #均衡</span></role>

将此文件分发到各DB1~3中的/etc/mysql-mmm/下

8、每一个DB中都会有mmm_agent的配置文件，编辑mmm_agent.conf

在数据库服务器上，还有一个mmm_agent.conf需要修改，其内容是：

<span style="COLOR: rgb(0,0,0)">include mmm_common.conf# The </span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">this</span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(0,0,0)"> variable refers to this server.Proper operation requires# that </span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">this</span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(0,0,0)"> server (db1 by default), as well as all other servers, have the# proper IP addresses set </span><span style="COLOR: rgb(0,0,255)">in</span><span style="COLOR: rgb(0,0,0)"> mmm_common.conf.this db2</span>

第一行表示：将之前Monitor中的mmm_common.conf文件载入到此文件中，供此文件中的参数设用。

最后一行标记此主机的角色（引用mmm_common.conf中的host段）在不同的数据库服务器上要分别改为db1和db3否则代理就会无法启动。

9、编辑mmm_mon.confg

在Monitor上，修改mmm_mon.conf文件，修改后内容为：

<span style="COLOR: rgb(0,0,0)">include mmm_common.conf</span><monitor><span style="COLOR: rgb(0,0,0)">	ip				</span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.116</span><span style="COLOR: rgb(0,0,0)"> #当前monitor主机地址	pid_path			</span>/var/run/mysql-mmm/<span style="COLOR: rgb(0,0,0)">mmm_mond.pid	bin_path			</span>/usr/libexec/mysql-<span style="COLOR: rgb(0,0,0)">mmm	status_path		 </span>/var/lib/mysql-mmm/<span style="COLOR: rgb(0,0,0)">mmm_mond.status	ping_ips			</span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.109</span>, <span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.112</span><span style="COLOR: rgb(0,0,0)"> #真实DB地址	auto_set_online	 </span><span style="COLOR: rgb(128,0,128)">10</span><span style="COLOR: rgb(0,0,0)">	# The kill_host_bin does not exist by default, though the monitor will	# throw a warning about it missing.See the section </span><span style="COLOR: rgb(128,0,128)">5.10</span> <span style="COLOR: rgb(128,0,0)">"</span><span style="COLOR: rgb(128,0,0)">Kill Host</span>	# Functionality<span style="COLOR: rgb(128,0,0)">"</span><span style="COLOR: rgb(128,0,0)"> in the PDF documentation.</span><span style="COLOR: rgb(0,0,0)">	#	# kill_host_bin	 </span>/usr/libexec/mysql-mmm/monitor/<span style="COLOR: rgb(0,0,0)">kill_host	#</span></monitor><host default><span style="COLOR: rgb(0,0,0)">	monitor_user		mmm_monitor #监控DB的用户名	monitor_password	</span><span style="COLOR: rgb(128,0,128)">123456</span><span style="COLOR: rgb(0,0,0)"> #密码</span></host><span style="COLOR: rgb(0,0,0)">debug </span><span style="COLOR: rgb(128,0,128)">0</span> #关闭debug功能，如果程序无法监控得到，可以使用debug 1查错

10、启动MMM

在各DB端启动mmm-agent

#cd /etc/init.d/<span style="COLOR: rgb(0,0,0)"># chkconfig mysql</span>-mmm-<span style="COLOR: rgb(0,0,0)">monitor on# service mysql</span>-mmm-monitor start

在Monitor端启动监控程序

#cd /etc/init.d/<span style="COLOR: rgb(0,0,0)"># chkconfig mysql</span>-mmm-<span style="COLOR: rgb(0,0,0)">monitor on# service mysql</span>-mmm-monitor start

过几秒钟，就可以使用mmm_control show查看在线监控端(DB)了

[root@essun ~]# service mysql-mmm-<span style="COLOR: rgb(0,0,0)">monitor statusmmm_mond (pid</span><span style="COLOR: rgb(128,0,128)">5395</span><span style="COLOR: rgb(0,0,0)">) is running...[root@essun </span>~<span style="COLOR: rgb(0,0,0)">]# mmm_control showdb1(</span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.109</span>) master/<span style="COLOR: rgb(0,0,0)">ONLINE. Roles:db2(</span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.112</span>) master/ONLINE. Roles: reader(<span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.22</span>), writer(<span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.24</span><span style="COLOR: rgb(0,0,0)">)db3(</span><span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.113</span>) slave/ONLINE. Roles: reader(<span style="COLOR: rgb(128,0,128)">192.168</span>.<span style="COLOR: rgb(128,0,128)">1.23</span>)

注：可以使用

[root@essun ~]# mmm_control --<span style="COLOR: rgb(0,0,0)">helpInvalid command </span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(128,0,0)">--help</span><span style="COLOR: rgb(128,0,0)">'</span><span style="COLOR: rgb(0,0,0)">Valid commands are:	help							</span>-<span style="COLOR: rgb(0,0,0)"> show this message	</span><span style="COLOR: rgb(0,0,255)">ping</span>							- <span style="COLOR: rgb(0,0,255)">ping</span><span style="COLOR: rgb(0,0,0)"> monitor	show							</span>-<span style="COLOR: rgb(0,0,0)"> show status	checks [</span><host>|all [<check>|all]] -<span style="COLOR: rgb(0,0,0)"> show checks status	set_online </span><host>				 - set host <host><span style="COLOR: rgb(0,0,0)"> online	set_offline </span><host>				- set host <host><span style="COLOR: rgb(0,0,0)"> offline	mode							</span>-<span style="COLOR: rgb(0,0,0)"> print current mode.	set_active						</span>-<span style="COLOR: rgb(0,0,0)"> switch into active mode.	set_manual						</span>-<span style="COLOR: rgb(0,0,0)"> switch into manual mode.	set_passive					 </span>-<span style="COLOR: rgb(0,0,0)"> switch into passive mode.	move_role [</span>--force] <role> <host> - move exclusive role <role> to host <host><span style="COLOR: rgb(0,0,0)">										(Only use </span>--force <span style="COLOR: rgb(0,0,255)">if</span> you know what you are doing!<span style="COLOR: rgb(0,0,0)">)	set_ip </span><ip> <host>				- set role with ip <ip> to host <host></host></ip></host></ip></host></role></host></role></host></host></host></host></check></host>

查看mmm_control的可用参数

11、模拟DB2下线

Monitor当前状态

让DB2下线，当前可写主机是db1,db3

db2没有下线之前还可以读写，当下线之后，可写的切换到DB1上了，所有读的都到了db3上了

当DB2重新上线后的情况如下

注：DB1、DB同时只能一有个写，一个读！

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