?下面要配置的MySQL Cluster環(huán)境包含四臺(tái)數(shù)據(jù)庫服務(wù)器和一臺(tái)管理服務(wù)器，如下：
function IPServer Nameserver id monitor 192.168.84.174 - - master 192.168.85.167 db1 1 master 192.168.85.169 db2 2 slave 192.168.85.171 db3 3 slave 192.168.85.168 db4 4
? ? ? ? ? ? 配置完成后，使用下面的虛擬IP訪問MySQL Cluster
IProle 192.168.85.200 writer 192.168.85.201 reader 192.168.85.202 reader 192.168.85.203 reader
? ? ? ??一、配置MySQL Relication
? ? ? ??1. 安裝MySQL
? ? ? ? 通過yum命令直接安裝了mysql5.1.52。
? ? ? ??2. 修改配置文件/etc/my.cnf
? ? ? ? 要將添加的內(nèi)容放在配置文件的[mysqld]部分，如下：? ? ? ??
[plain] ?view plaincopyprint?
[mysqld]?? datadir=/var/lib/mysql?? socket=/var/lib/mysql/mysql.sock?? user=mysql?? ?? #下面為新添加的內(nèi)容?? default-storage-engine?=?innodb?? ?? replicate-ignore-db?=?mysql?? binlog-ignore-db????=?mysql?? ?? server-id???????????=?1?? log-bin?????????????=?/var/log/mysql/mysql-bin.log?? log_bin_index???????=?/var/log/mysql/mysql-bin.log.index?? relay_log???????????=?/var/log/mysql/mysql-bin.relay?? relay_log_index?????=?/var/log/mysql/mysql-bin.relay.index?? expire_logs_days????=?10?? max_binlog_size?????=?100M?? log_slave_updates???=?1??
? ? ? ?注意：
? ? ? ?1）server-id在每臺(tái)服務(wù)器上的值都是不一樣，在這里依次為1、2、3、4。
? ? ? ?2）因?yàn)樵谶@里把log文件配置到了/var/log/mysql下，而mysql默認(rèn)的目錄是在/var/lib/mysql，所以首先要新建mysql文件夾，然后用chown -R mysql.mysql mysql 命令將mysql的所有者修改為用戶mysql。其次要保證，mysql文件夾的權(quán)限755（即-rwxr-xr-x）。
? ? ? ?如果沒有修改權(quán)限和所有者，重啟服務(wù)時(shí)就會(huì)在錯(cuò)誤日志中出現(xiàn)找不到mysql-bin.log或者mysql-bin.log.index的錯(cuò)誤（/usr/libexec/mysqld: File '/var/log/mysql/mysql-bin.log.index' not found (Errcode: 13)
? ? ? ?3. 重新啟動(dòng)mysql服務(wù)
? ? ? ?在完成了對(duì)my.cnf的修改后，通過service mysqld restart
? ? ? ?1）登錄mysql，執(zhí)行show master status，看是否有如下輸出：
+------------------+----------+--------------+------------------+
? ? ? ? 2）到/var/log/mysql目錄下，看是否產(chǎn)生了類似mysql-bin.000001和mysql-bin.log.index的文件。
? ? ? ?二、新建同步數(shù)據(jù)庫需要的用戶
? ? ? ?使用mysql-mmm時(shí)一共需要三個(gè)用戶: replication、mmm_agent和mmm_monitor（管理服務(wù)器上用來監(jiān)控cluster狀態(tài)的用戶，所以可以限定只能從管理服務(wù)器登錄 ）。使用下面三條命令新建這三個(gè)用戶并分配相應(yīng)的權(quán)限：
[sql] ?view plaincopyprint?
GRANT ?REPLICATION?CLIENT????????????????? ON ?*.*? TO ? 'mmm_monitor' @ '192.168.84.%' ?IDENTIFIED? BY ? 'monitor' ;?? GRANT ?SUPER,?REPLICATION?CLIENT,?PROCESS? ON ?*.*? TO ? 'mmm_agent' @ '192.168.85.%' ???IDENTIFIED? BY ? 'agent' ;?? GRANT ?REPLICATION?SLAVE?????????????????? ON ?*.*? TO ? 'replication' @ '192.168.85.%' ?IDENTIFIED? BY ? 'replication' ;??
? ? ??
三、同步主從數(shù)據(jù)庫 ? ? ??1. 從主數(shù)據(jù)庫服務(wù)器導(dǎo)出當(dāng)前數(shù)據(jù)庫內(nèi)容 ? ? ??
[sql] ?view plaincopyprint?
mysql>?FLUSH?TABLES? WITH ? READ ?LOCK;?? mysql>?SHOW?MASTER?STATUS;?? +?? |?File?????????????|?Position?|?Binlog_Do_DB?|?Binlog_Ignore_DB?|?? +?? |?mysql-bin.000001?|??????106?|??????????????|?mysql????????????|?? +??
? ? ? ? 注意保留上述信息，后面還會(huì)用到。另外，不要結(jié)束當(dāng)前mysql控制臺(tái)，重新打開一個(gè)窗口，導(dǎo)出數(shù)據(jù)庫。
? ? ? ? # mysqldump -uroot -proot --all-databases > db01_20111005.sql
? ? ? ? 釋放鎖
[html] ?view plaincopyprint?
mysql > ?UNLOCK?TABLES;??
? ? ? ?
2. 將導(dǎo)出的sql文件導(dǎo)入到其他幾臺(tái)數(shù)據(jù)庫服務(wù)器上
。首先通過scp復(fù)制過去：
[html] ?view plaincopyprint?
#?scp?db01_20111005.sql?root@192.168.85.167:/root/??
? ? ? ?在其他幾臺(tái)服務(wù)其上導(dǎo)入改SQL文件：
[html] ?view plaincopyprint?
#?mysql?-uroot?-proot? < ? db01_20111005.sql ??
? ? ??
3. 啟動(dòng)從數(shù)據(jù)庫SLAVE進(jìn)程。
[sql] ?view plaincopyprint?
mysql>?flush? privileges ;?? Query?OK,?0?rows ?affected?(0.00?sec)?? ?? mysql>?CHANGE?MASTER?TO ?master_host= '192.168.85.167' ,?master_port=3306,?master_user= 'replication' ,master_password= 'replication' ,?master_log_file= 'mysql-bin.000001' ,?master_log_pos=106;?? Query?OK,?0?rows ?affected?(0.07?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:?192.168.85.180?? ??????????????????Master_User:?replication?? ??????????????????Master_Port:?3306?? ????????????????Connect_Retry:?60?? ??????????????Master_Log_File:?mysql-bin.000001?? ??????????Read_Master_Log_Pos:?106?? ???????????????Relay_Log_File:?mysql-bin.000003?? ????????????????Relay_Log_Pos:?251?? ????????Relay_Master_Log_File:?mysql-bin.000001?? ?????????????Slave_IO_Running:?Yes?? ????????????Slave_SQL_Running:?Yes?? ??????????????Replicate_Do_DB:?? ??????????Replicate_Ignore_DB:?mysql?? ???????????Replicate_Do_Table:?? ???????Replicate_Ignore_Table:?? ??????Replicate_Wild_Do_Table:?? ??Replicate_Wild_Ignore_Table:?? ???????????????????Last_Errno:?0?? ???????????????????Last_Error:?? ?????????????????Skip_Counter:?0?? ??????????Exec_Master_Log_Pos:?106?? ??????????????Relay_Log_Space:?400?? ??????????????Until_Condition:?None?? ???????????????Until_Log_File:?? ????????????????Until_Log_Pos:?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:?0?? Master_SSL_Verify_Server_Cert:?No ?? ????????????????Last_IO_Errno:?0?? ????????????????Last_IO_Error:?? ???????????????Last_SQL_Errno:?0?? ???????????????Last_SQL_Error:?? 1?row?in ? set ?(0.00?sec)??
? ? ? ??
4. 將db02作為master，db01作為slave，重復(fù)1-3。
? ? ? ??四、安裝MMM
? ? ? ? 在管理服務(wù)器和數(shù)據(jù)庫服務(wù)器上分別要運(yùn)行mysql-mmm monitor和agent程序。下面分別安裝：
? ? ? ??1. 安裝監(jiān)控程序
? ? ? ? ?在管理服務(wù)器（192.168.84.174）上，執(zhí)行下面命令：
[plain] ?view plaincopyprint?
#?yum?-y?install?mysql-mmm-monitor*??
? ? ? ? ?與monitor依賴的所有文件也會(huì)隨之安裝，但是有一個(gè)例外perl-Time-HiRes，所以還需要執(zhí)行下面的命令：
[plain] ?view plaincopyprint?
#?yum?-y?install?perl-Time-HiRes*??
? ? ? ? ?
2. 安裝代理程序
? ? ? ? ?在數(shù)據(jù)庫服務(wù)器上執(zhí)行下面的命令：
[plain] ?view plaincopyprint?
#?yum?-y?install?mysql-mmm-agent*??
? ? ? ??
?五、配置MMM ? ? ? ??
1. 編輯mmm_common.conf
? ? ? ? ?完成安裝后，所有的配置文件都放到了/etc/mysql-mmm/下面。管理服務(wù)器和數(shù)據(jù)庫服務(wù)器上都要包含一個(gè)共同的文件mmm_common.conf，內(nèi)容如下：
[plain] ?view plaincopyprint?
active_master_role??????writer?? ?? <host?default>?? ????cluster_interface???????eth0?? ?? ????pid_path????????????????/var/run/mysql-mmm/mmm_agentd.pid?? ????bin_path????????????????/usr/libexec/mysql-mmm/?? ?? ????replication_user????????replication?? ????replication_password????replication?? ?? ????agent_user??????????????mmm_agent?? ????agent_password??????????agent?? </host>?? ?? <host?db1>?? ????ip??????192.168.85.167?? ????mode????master?? ????peer????db2?? </host>?? ?? <host?db2>?? ????ip??????192.168.85.169?? ????mode????master?? ????peer????db1?? </host>?? ?? <host?db3>?? ????ip??????192.168.85.171?? ????mode????slave?? </host>?? ?? <host?db4>?? ????ip??????192.168.85.168?? ????mode????slave?? </host>?? ?? <role?writer>?? ????hosts???db1,?db2?? ????ips?????192.168.85.200?? ????mode????exclusive?? </role>?? ?? <role?reader>?? ????hosts???db2,?db3,?db4?? ????ips?????192.168.85.201,?192.168.85.202,?192.168.85.203?? ????mode????balanced?? </role>??
? ? ? ? 可以在db1上編輯該文件后，通過scp命令分別復(fù)制到monitor、db2、db3和db4上。
? ? ? ?
?2. 編輯mmm_agent.conf。
在數(shù)據(jù)庫服務(wù)器上，還有一個(gè)mmm_agent.conf需要修改，其內(nèi)容是：
[plain] ?view plaincopyprint?
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?db1??
最后一行的db1，在不同的數(shù)據(jù)庫服務(wù)器上要分別改為db2、db3和db4，否則代理就會(huì)無法啟動(dòng)。
? ? ? ??3. 編輯mmm_mon.confg。 在管理服務(wù)器上，修改mmm_mon.conf文件，修改后內(nèi)容為：
[plain] ?view plaincopyprint?
include?mmm_common.conf?? ?? <monitor>?? ????ip??????????????????192.168.84.174?? ????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????????????192.168.85.167,?192.168.85.169,?192.168.85.171,?192.168.85.168?? ????auto_set_online?????60?? ?? ????#?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?? ????monitor_password????monitor?? </host>?? ?? debug?0??
? ? ? ? ?
六、啟動(dòng)MMM
? ? ? ??1. 在數(shù)據(jù)庫服務(wù)器上啟動(dòng)代理程序
[plain] ?view plaincopyprint?
#?cd?/etc/init.d/?? #?chkconfig?mysql-mmm-agent?on?? #?service?mysql-mmm-agent?start??
? ? ? ??
2. 在管理服務(wù)器上啟動(dòng)監(jiān)控程序
[plain] ?view plaincopyprint?
#?cd?/etc/init.d/?? #?chkconfig?mysql-mmm-monitor?on?? #?service?mysql-mmm-monitor?start??
? ? ? 啟動(dòng)后，稍等幾秒，可以通過mmm_control程序查看狀態(tài)：
[plain] ?view plaincopyprint?
#?mmm_control?show?? ??db1(192.168.85.167)?master/ONLINE.?Roles:?writer(192.168.85.200)?? ??db2(192.168.85.169)?master/ONLINE.?Roles:?reader(192.168.85.202)?? ??db3(192.168.85.171)?slave/ONLINE.?Roles:?reader(192.168.85.203)?? ??db4(192.168.85.168)?slave/ONLINE.?Roles:?reader(192.168.85.201)??
? ? ? ?
七、遇到兩個(gè)問題
? ? ? ? ?在管理服務(wù)器上，一切都完成后，通過mmm_control查看狀態(tài)，得到下面的錯(cuò)誤信息：ERROR: Can't connect to monitor daemon! debug 0 debug 1
? ? ? ?2. 防火墻問題導(dǎo)致Warning: agent on host db1 is not reachable.
? ? ? ?控制臺(tái)程序正確啟動(dòng)后，再次執(zhí)行mmm_control show，卻看到下面的輸出：
[plain] ?view plaincopyprint?
#?Warning:?agent?on?host?db1?is?not?reachable?? #?Warning:?agent?on?host?db2?is?not?reachable?? #?Warning:?agent?on?host?db3?is?not?reachable?? #?Warning:?agent?on?host?db4?is?not?reachable?? ??db1(192.168.85.167)?master/ONLINE.?Roles:?? ??db2(192.168.85.169)?master/ONLINE.?Roles:?? ??db3(192.168.85.171)?slave/ONLINE.?Roles:?? ??db4(192.168.85.168)?slave/ONLINE.?Roles:??
? ? ? ?再次打開debug，發(fā)現(xiàn)了下面的錯(cuò)誤信息：
2011/10/07 13:38:45 DEBUG Sending command 'GET_AGENT_STATUS()' to db4 (192.168.85.167:9989)
? ? ? ?通過telnet 192.168.85.167 9989 No route to host
? ? 參考文章：
? ??MySQL MMM 官方安裝文檔?http://mysql-mmm.org/mmm2:guide?
? ? MMM Manual?http://mysql-mmm.org/mysql-mmm.html
總結(jié)
以上是生活随笔 為你收集整理的从零开始配置MySQL MMM 的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。
如果覺得生活随笔 網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔 推薦給好友。
