MySQLmaster-master如何配置

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　　MySQLmaster-master怎么配置

　　1、修改MySQL配置文件
　　兩臺MySQL均如要開啟binlog日志功能，開啟方法：在MySQL配置文件[MySQLd]段中加上log-bin=MySQL-bin選項
　　兩臺MySQL的server-ID不能一樣，默認情況下兩臺MySQL的serverID都是1，需將其中一臺修改為2即可
　　2、將192.168.1.201設為192.168.1.202的主服務器
　　在192.168.1.201上新建授權用戶
　　MySQL>grantreplicationslaveon*.*to'replication'@'%'identifiedby'replication';QueryOK,0rowsaffected(0.00sec)MySQL>showmasterstatus;+------------------+----------+--------------+------------------+|File|Position|Binlog_Do_DB|Binlog_Ignore_DB|+------------------+----------+--------------+------------------+|MySQL-bin.000003|374|||+------------------+----------+--------------+------------------+1rowinset(0.00sec)
　　在192.168.1.202上將192.168.1.201設為自己的主服務器
　　MySQL>changemastertomaster_host='192.168.1.201',master_user='replication',master_password='replication',master_log_file='MySQL-bin.000003',master_log_pos=374;QueryOK,0rowsaffected(0.05sec)MySQL>startslave;QueryOK,0rowsaffected(0.00sec)MySQL>showslavestatus\G***************************1.row***************************Slave_IO_State:WaitingformastertosendeventMaster_Host:192.168.1.201Master_User:replicationMaster_Port:3306Connect_Retry:60Master_Log_File:MySQL-bin.000003Read_Master_Log_Pos:374Relay_Log_File:MySQL-master2-relay-bin.000002Relay_Log_Pos:235Relay_Master_Log_File:MySQL-bin.000003Slave_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:0Last_Error:Skip_Counter:0Exec_Master_Log_Pos:374Relay_Log_Space:235Until_Condition:NoneUntil_Log_File:Until_Log_Pos:0Master_SSL_Allowed:NoMaster_SSL_CA_File:Master_SSL_CA_Path:Master_SSL_Cert:Master_SSL_Cipher:Master_SSL_Key:Seconds_Behind_Master:01rowinset(0.00sec)
　　3、將192.168.1.202設為192.168.1.201的主服務器
　　在192.168.1.202上新建授權用戶
　　MySQL>grantreplicationslaveon*.*to'replication'@'%'identifiedby'replication';QueryOK,0rowsaffected(0.00sec)MySQL>showmasterstatus;+------------------+----------+--------------+------------------+|File|Position|Binlog_Do_DB|Binlog_Ignore_DB|+------------------+----------+--------------+------------------+|MySQL-bin.000003|374|||+------------------+----------+--------------+------------------+1rowinset(0.00sec)
　　在192.168.1.201上，將192.168.1.202設為自己的主服務器
　　MySQL>changemastertomaster_host='192.168.1.202',master_user='replication',master_password='replication',master_log_file='MySQL-bin.000003',master_log_pos=374;QueryOK,0rowsaffected(0.05sec)MySQL>startslave;QueryOK,0rowsaffected(0.00sec)MySQL>showslavestatus\G***************************1.row***************************Slave_IO_State:WaitingformastertosendeventMaster_Host:192.168.1.202Master_User:replicationMaster_Port:3306Connect_Retry:60Master_Log_File:MySQL-bin.000003Read_Master_Log_Pos:374Relay_Log_File:MySQL-master1-relay-bin.000002Relay_Log_Pos:235Relay_Master_Log_File:MySQL-bin.000003Slave_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:0Last_Error:Skip_Counter:0Exec_Master_Log_Pos:374Relay_Log_Space:235Until_Condition:NoneUntil_Log_File:Until_Log_Pos:0Master_SSL_Allowed:NoMaster_SSL_CA_File:Master_SSL_CA_Path:Master_SSL_Cert:Master_SSL_Cipher:Master_SSL_Key:Seconds_Behind_Master:01rowinset(0.00sec)
　　4、MySQL同步測試
　　如上述均正確配置，現在任何一臺MySQL上更新數據都會同步到另一臺MySQL，MySQL同步在此不再演示。
　　keepalived怎么安裝及配置
　　1、192.168.1.201服務器上keepalived安裝及配置
　　安裝keepalived
　　#tarzxvfkeepalived-1.1.20.tar.gz#cdkeepalived-1.1.20#./configure--prefix=/usr/local/keepalived--with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686#make&&makeinstall
　　配置keepalived
　　我們自己在新建一個配置文件，默認情況下keepalived啟動時會去/etc/keepalived目錄下找配置文件
　　#mkdir/etc/keepalived#vi/etc/keepalived/keepalived.conf!ConfigurationFileforkeepalivedglobal_defs{notification_email{luwenju@live.cn}notification_email_fromluwenju@live.cnsmtp_server127.0.0.1smtp_connect_timeout30router_idMySQL-ha}vrrp_instanceVI_1{stateBACKUP#兩臺配置此處均是BACKUPinterfaceeth0virtual_router_id51priority100#優先級，另一臺改為90advert_int1nopreempt#不搶占，只在優先級高的機器上設置即可，優先級低的機器不設置authentication{auth_typePASSauth_pass1111}virtual_ipaddress{192.168.1.200}}virtual_server192.168.1.2003306{delay_loop2#每個2秒檢查一次real_server狀態lb_algowrr#LVS算法lb_kindDR#LVS模式persistence_timeout60#會話保持時間protocolTCPreal_server192.168.1.2013306{weight3notify_down/usr/local/MySQL/bin/MySQL.sh#檢測到服務down后執行的腳本TCP_CHECK{connect_timeout10#連接超時時間nb_get_retry3#重連次數delay_before_retry3#重連間隔時間connect_port3306#健康檢查端口}}
　　編寫檢測服務down后所要執行的腳本
　　#vi/usr/local/MySQL/bin/MySQL.sh#!/bin/shpkillkeepalived#chmod+x/usr/local/MySQL/bin/MySQL.sh
　　注：此腳本是上面配置文件notify_down選項所用到的，keepalived使用notify_down選項來檢查real_server的服務狀態，當發現real_server服務故障時，便觸發此腳本;我們看到的是，腳本就一個命令，通過pkillkeepalived強制殺死keepalived進程，從而實現了MySQL故障自動轉移。另外，我們不用擔心兩個MySQL會同時提供數據更新操作，因為每臺MySQL上的keepalived的配置里面只有本機MySQL的IP+VIP，而不是兩臺MySQL的IP+VIP
　　啟動keepalived
　　#/usr/local/keepalived/sbin/keepalived–D#ps-aux|grepkeepalived
　　測試
　　找一臺局域網PC，然后去pingMySQL的VIP，這時候MySQL的VIP是可以ping的通的
　　停止MySQL服務，看keepalived健康檢查程序是否會觸發我們編寫的腳本
　　2、192.168.1.202上keepalived安裝及配置
　　安裝keepalived
　　#tarzxvfkeepalived-1.1.20.tar.gz#cdkeepalived-1.1.20#./configure--prefix=/usr/local/keepalived--with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686#make&&makeinstall
　　配置keepalived
　　這臺配置和上面基本一樣，但有三個地方不同：優先級為90、無搶占設置、real_server為本機IP
　　#mkdir/etc/keepalived#vi/etc/keepalived/keepalived.conf!ConfigurationFileforkeepalivedglobal_defs{notification_email{luwenju@live.cn}notification_email_fromluwenju@live.cnsmtp_server127.0.0.1smtp_connect_timeout30router_idMySQL-ha}vrrp_instanceVI_1{stateBACKUPinterfaceeth0virtual_router_id51priority90advert_int1authentication{auth_typePASSauth_pass1111}virtual_ipaddress{192.168.1.200}}virtual_server192.168.1.2003306{delay_loop2lb_algowrrlb_kindDRpersistence_timeout60protocolTCPreal_server192.168.1.2023306{weight3notify_down/usr/local/MySQL/bin/MySQL.shTCP_CHECK{connect_timeout10nb_get_retry3delay_before_retry3connect_port3306}}
　　編寫檢測服務down后所要執行的腳本
　　#vi/usr/local/MySQL/bin/MySQL.sh#!/bin/shpkillkeepalived#chmod+x/usr/local/MySQL/bin/MySQL.sh啟動keepalived#/usr/local/keepalived/sbin/keepalived–D#ps-aux|grepkeepalived
　　測試
　　停止MySQL服務，看keepalived健康檢查程序是否會觸發我們編寫的腳本
　　三、測試
　　MySQL遠程登錄測試
　　我們找一臺安裝有MySQL客戶端的windows，然后登錄VIP，看是否能登錄，在登錄之兩臺MySQL服務器都要授權允許從遠程登錄
　　MySQL>grantallprivilegeson*.*to'root'@'%'identifiedby'123456';QueryOK,0rowsaffected(0.00sec)MySQL>flushprivileges;QueryOK,0rowsaffected(0.00sec)
　　使用客戶端登錄VIP測試
　　C:\MySQL\bin>MySQL.exe-uroot-p123456-h292.168.1.200-P3306WelcometotheMySQLmonitor.Commandsendwith;or\g.YourMySQLconnectionidis224Serverversion:5.0.89-logSourcedistributionType'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.MySQL>
　　●keepalived故障轉移測試
　　※在windows客戶端一直去pingVIP，然后關閉192.168.1.201上的keepalived，正常情況下VIP就會切換到192.168.1.202上面去
　　※開啟192.168.1.201上的keepalived，關閉192.168.1.202上的keepalived，看是否能自動切換，正常情況下VIP又會屬于192.168.1.201
　　注：keepalived切換速度還是非常塊的，整個切換過程只需1-3秒
　　●MySQL故障轉移測試
　　※在192.168.1.201上關閉MySQL服務，看VIP是否會切換到192.168.1.202上
　　※開啟192.168.1.201上的MySQL和keepalived，然后關閉192.168.1.202上的MySQL，看VIP是否會切換到192.168.1.201上
　　下面是用windows客戶端連接的MySQL的VIP，在切換時我執行了一個MySQL查詢命令，從執行showdatabases到顯示出結果時間為3-5秒(大家看到的是上面有個錯誤提示，不過不用擔心，因為我們的keepalived切換大概為3秒左右，這3秒左右VIP是誰都不屬于的)
　　MySQL>showdatabases;ERROR2006(HY000):MySQLserverhasgoneawayNoconnection.Tryingtoreconnect...Connectionid:592Currentdatabase:***NONE***+--------------------+|Database|+--------------------+|information_schema||MySQL||test|+--------------------+3rowsinset(9.01sec)

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