MMM+MYSQL主從同步

1.安裝mysql依賴包

[root@centos6 mysql-5.1.63]# yum install ncurses ncurses-devel

 

 

2.安裝mysql

[root @server lnmp]tarzxvf mysql-5.1.63.tar.gz -C/usr/src [root @server lnmp]cd/usr/src/mysql-5.1.63 [root@centos6 mysql-5.1.63]#./configure --prefix=/usr/local/mysql/ --enable-assembler --with-extra-charsets=all --with-client-ldflags=-all-static --with-mysqld-ldflags=-all-static --with-pthread --with-big-tables --without-debug --with-ssl [root@centos6 mysql-5.1.63]make&&makeinstall [root@centos6 mysql-5.1.63]/usr/local/mysql/bin/mysql_install_db--user=mysql [root@centos6 mysql-5.1.63]chown-R root.mysql/usr/local/mysql [root@centos6 mysql-5.1.63]cpsupport-files/my-medium.cnf/etc/my.cnf [root@centos6 mysql-5.1.63]cpsupport-files/mysql.server/etc/init.d/mysqld [root@centos6 mysql-5.1.63]chmod+x/etc/init.d/mysqld [root@centos6 mysql-5.1.63]chkconfig --add mysqld [root@centos6 mysql-5.1.63]chkconfig --level 35 mysqld on 開機啓動 [root@centos6 mysql-5.1.63]service mysqld start

 

 3.修改配置文件DB1，DB2和DB3

[root@centos6 mysql]# vi /etc/my.cnf  .... log-bin=mysql-bin   server-id      = 1 保存

DB2 [root@centos6 mysql]# vi /etc/my.cnf  .... log-bin=mysql-bin     server-id      = 2 #ID是惟一的 保存

BD3只須要修改 server-id  =3便可

 

 

4.配置同步

配置主DB1，從DB2和DB3

DB1 [root@centos6 mysql]# /usr/local/mysql/bin/mysql -u root MySQL> grant replication slave on *.* to'replication'@'%'identified by'xxxx';       建立受權同步用戶 Query OK, 0 rows affected (0.00 sec)     MySQL> show master status;  +------------------+----------+--------------+------------------+  | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |  +------------------+----------+--------------+------------------+  | MySQL-bin.000003 |      374 |              |                  |   +------------------+----------+--------------+------------------+  1 rowinset(0.00 sec)

DB2 [root@centos6 mysql]# /usr/local/mysql/bin/mysql -u root MySQL> change master to master_host='192.168.20.158',master_user='replication',master_password='xxxxx',master_log_file='MySQL-bin.000003',master_log_pos=374;  Query OK, 0 rows affected (0.05 sec)     MySQL> start slave;  Query OK, 0 rows affected (0.00 sec)     MySQL> show slave status\G  *************************** 1. row ***************************               Slave_IO_State: Waitingformaster to send event                  Master_Host: 192.168.20.158                  Master_User: replication                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: MySQL-bin.000003          Read_Master_Log_Pos: 374               Relay_Log_File: MySQL-master2-relay-bin.000002                Relay_Log_Pos: 235        Relay_Master_Log_File: MySQL-bin.000003             Slave_IO_Running: Yes                          yes成功           Slave_SQL_Running: Yes                          yes成功             Replicate_Do_DB:           Replicate_Ignore_DB:            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: 374              Relay_Log_Space: 235              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  1 rowinset(0.00 sec)

 

 

DB3 [root@centos6 mysql]# /usr/local/mysql/bin/mysql -u root MySQL> change master to master_host='192.168.20.158',master_user='replication',master_password='xxxxx',master_log_file='MySQL-bin.000003',master_log_pos=374;  Query OK, 0 rows affected (0.05 sec)     MySQL> start slave;  Query OK, 0 rows affected (0.00 sec)     MySQL> show slave status\G  *************************** 1. row ***************************               Slave_IO_State: Waitingformaster to send event                  Master_Host: 192.168.20.158                  Master_User: replication                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: MySQL-bin.000003          Read_Master_Log_Pos: 374               Relay_Log_File: MySQL-master2-relay-bin.000002                Relay_Log_Pos: 235        Relay_Master_Log_File: MySQL-bin.000003             Slave_IO_Running: Yes                          yes成功           Slave_SQL_Running: Yes                          yes成功             Replicate_Do_DB:           Replicate_Ignore_DB:            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: 374              Relay_Log_Space: 235              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  1 rowinset(0.00 sec)

 

 

 

 

配置DB2主，DB1從    （即互爲MATER）

 

 

 

DB2 [root@centos6 mysql]# /usr/local/mysql/bin/mysql -u root MySQL> grant replication slave on *.* to'replication'@'%'identified by'xxxx';  Query OK, 0 rows affected (0.00 sec)     MySQL> show master status;  +------------------+----------+--------------+------------------+  | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |  +------------------+----------+--------------+------------------+  | MySQL-bin.000003 |      374 |              |                  |   +------------------+----------+--------------+------------------+  1 rowinset(0.00 sec)

DB1 [root@centos6 mysql]# /usr/local/mysql/bin/mysql -u root MySQL> change master to master_host='192.168.20.156',master_user='replication',master_password='xxxxxx',master_log_file='MySQL-bin.000003',master_log_pos=374;  Query OK, 0 rows affected (0.05 sec)     MySQL> start slave;  Query OK, 0 rows affected (0.00 sec)     MySQL> show slave status\G  *************************** 1. row ***************************               Slave_IO_State: Waitingformaster to send event                  Master_Host: 192.168.20.156                  Master_User: replication                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: MySQL-bin.000003          Read_Master_Log_Pos: 374               Relay_Log_File: MySQL-master2-relay-bin.000002                Relay_Log_Pos: 235        Relay_Master_Log_File: MySQL-bin.000003             Slave_IO_Running: Yes                          yes成功           Slave_SQL_Running: Yes                          yes成功             Replicate_Do_DB:           Replicate_Ignore_DB:            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: 374              Relay_Log_Space: 235              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  1 rowinset(0.00 sec)

 

測試如今在DB1上建立一個數據庫，DB2和DB3都會同步表示成功。

 

 

 

5.安裝mysql-mmm

安裝Mysql-mmm以前，須要先安裝一些perl模塊，安裝方法用perl -MCPAN -e shell 直接在線安裝，第一次使用perl -MCPAN -e shell 命令時會有一大堆選項的，我直接enter過去，比較關鍵的是選擇地區、國家和源這三個，按的時候注意選擇一下就沒問題，DB一、DB2和DB3須要安裝如下模塊：

注意若是沒有安裝CPAN模塊須要手動編譯安裝：

數據庫受權一個Mysql-mmm專用用戶（DB一、DB2和DB3都要受權）：

 

DB1 [root@centos6 mysql]# /usr/local/mysql/bin/mysql -u root MySQL>grant super,replication client,process on *.* to'mmm_xxxxt'@'%'identified by'xxxxx';

 

安裝CPAN模塊：

 

 

yuminstallperl perl-devel   wget http://search.cpan.org/CPAN/authors/id/A/AN/ANDK/CPAN-1.9205.tar.gz   [root@centos6 MMM]# tar  zxvf CPAN-1.9205.tar.gz [root@centos6 MMM]# cd CPAN-1.9205 [root@centos6 CPAN-1.9205]# perl Makefile [root@centos6 CPAN-1.9205]# make [root@centos6 CPAN-1.9205]# make install

 

用CPAN模塊在線安裝其餘模塊：(DB1，DB2，DB3，MOM 都須要安裝)

# perl -MCPAN -e shell cpan>installAlgorithm::Diff cpan>installDBI cpan>installLog::Dispatch cpan>installLog::Log4perl cpan>installMail::Send cpan>installNet::ARP cpan>installProc::Daemon cpan>installTime::HiRes cpan>installDBD::mysql cpan>installFile::stat cpan>installFile:basename cpan>installClass::Singleton cpan>install Thread::Queue cpan>installPath::Class   腳本查看perl 安裝了那些模塊 [root@centos6 MMM]# vi perl-m #!/usr/bin/perl use strict; use ExtUtils::Installed; my $inst= ExtUtils::Installed->new(); my @modules = $inst->modules(); foreach(@modules) {        my $ver = $inst->version($_) ||"???";         printf("%-12s --  %s\n", $_, $ver); } exit;         [root@centos6 MMM]# perl perl-m    運行腳本查看模塊 Algorithm::Diff --  1.1902 CPAN         --  1.9205 Class::Singleton --  1.4 DBD::mysql   --  4.021 DBI          --  1.620 Log::Log4perl --  1.36 Mail         --  ??? Net::ARP     --  1.0 Perl         --  5.10.1 Proc::Daemon --  0.14 Test::Simple --  0.98 Thread::Queue --  2.12 Time::HiRes  --  1.9725 TimeDate     --  ???

 

安裝mysql-mmm

[root@centos6 MMM]# tar zxvf mysql-mmm-2.2.1.tar.gz [root@centos6 MMM]# cd mysql-mmm-2.2.1 [root@centos6 mysql-mmm-2.2.1]# make install /usr/lib/perl5/vendor_perl/5.8.8/MMM                MMM 使用的 perl 模塊 /usr/lib/mysql-mmm                                             MMM 的腳本揑件 /usr/sbin                                                              MMM 的命令保存路徑 /var/log/mysql-mmm                                            MMM 的日誌保存路徑 /etc                                                                     MMM 配置文件保存的路徑 /etc/mysql-mmm                                                 MMM 配置文件保存的路徑，優先級最高 /etc/init.d/                                                            agentd 和 monitor 的啓勱關閉腳本

 

 

6.配置MMM

DB1： vi/etc/mysql-mmm/mmm_agent.confinclude mmm_common.conf this db1 藍色的部分DB2和DB3則分別修改成db2和db3

vi/etc/mysql-mmm/mmm_common.conf   active_master_role      writer   <host default>         cluster_interface               eth3   #（對應本地網卡）         pid_path                               /var/run/mmm_agentd.pid         bin_path                               /usr/lib/mysql-mmm/     replication_user        replication     replication_password    replication         agent_user                              mmm_xxxx         agent_password                  mmm_xxxx </host> <host db1>         ip                                              192.168.20.158         mode                                    master         peer                                    db2 </host> <host db2>         ip                                              192.168.20.156         mode                                    master         peer                                    db1 </host> <host db3>         ip                                              192.168.20.157         mode                                    slave </host> <role writer>         hosts                                   db1, db2         ips                                             192.168.20.11         mode                                    exclusive </role> <role reader>         hosts                                   db1, db2, db3         ips                                             192.168.20.12, 192.168.20.13, 192.168.20.14         mode                                    balanced </role>

把改文件複製到DB2，DB3，MOM,.只需修改網卡名

啓動DB1,DB2,DB3 mmm-agent

[root @localhost mysql-mmm-2.2.1]# /etc/init.d/mysql-mmm-agent start Daemon bin:'/usr/sbin/mmm_agentd' Daemon pid:'/var/run/mmm_agentd.pid' Starting MMM Agent daemon... Ok   [root @localhost mysql-mmm-2.2.1]# echo "/etc/init.d/mysql-mmm-agent start" >> /etc/rc.d/rc.local   開機啓動

 

 

最後配置MOM的mysql-mmm-monitor

 

[root @localhost mysql-mmm-2.2.1]vi/etc/mysql-mmm/mmm_mon.conf include mmm_common.conf <monitor>         ip                                      192.168.20.159         pid_path                               /var/run/mmm_mond.pid         bin_path                               /usr/lib/mysql-mmm/         status_path                            /var/lib/misc/mmm_mond.status         ping_ips                                192.168.20.156, 192.168.20.157, 192.168.20.158 </monitor> <host default>         monitor_user                    mmm_XXX         monitor_password                mmm_XXXt </host> debug 0

 

啓動mysql-mmm-monitor：

 

 

 

[root @localhost mysql-mmm-2.2.1]# /etc/init.d/mysql-mmm-monitor start Daemon bin:'/usr/sbin/mmm_mond' Daemon pid:'/var/run/mmm_mond.pid' Starting MMM Monitor daemon: Ok [root @localhost mysql-mmm-2.2.1]# mmm_control show   db1(192.168.93.137) master/AWAITING_RECOVERY. Roles:   db2(192.168.93.138) master/AWAITING_RECOVERY. Roles:   db3(192.168.93.139) slave/AWAITING_RECOVERY. Roles: [root @localhost mysql-mmm-2.2.1]#echo "/etc/init.d/mysql-mmm-monitor start" >>  /etc/rc.d/rc.local   開機啓動     將全部DB服務器設爲online狀態： [root @localhost mysql-mmm-2.2.1]# mmm_control set_online db1 OK: State of'db1'changed to ONLINE. Now you can wait sometimeand check its new roles! [root @localhost mysql-mmm-2.2.1]# mmm_control set_online db2 OK: State of'db2'changed to ONLINE. Now you can wait sometimeand check its new roles! [root @localhost mysql-mmm-2.2.1]# mmm_control set_online db3 OK: State of'db3'changed to ONLINE. Now you can wait sometimeand check its new roles! [root @localhost mysql-mmm-2.2.1]# mmm_control show db1(192.168.20.158) master/ONLINE. Roles: reader(192.168.20.13), writer(192.168.20.11) db2(192.168.20.156) master/ONLINE. Roles: reader(192.168.20.12) db3(192.168.20.157) slave/ONLINE. Roles: reader(192.168.20.14)       設置成功，下面查看節點狀態：  [root @localhost mysql-mmm-2.2.1]# mmm_control checks all db2 ping        [last change: 2011/10/0703:10:39]  OK db2  mysql        [last change: 2011/10/0703:10:39]  OK db2  rep_threads  [last change: 2011/10/0703:10:39]  OK db2  rep_backlog  [last change: 2011/10/0703:10:39]  OK: Backlog is null db3 ping        [last change: 2011/10/0703:10:39]  OK db3  mysql        [last change: 2011/10/0703:10:39]  OK db3  rep_threads  [last change: 2011/10/0703:10:39]  OK db3  rep_backlog  [last change: 2011/10/0703:10:39]  OK: Backlog is null db1 ping        [last change: 2011/10/0703:10:39]  OK db1  mysql        [last change: 2011/10/0703:10:39]  OK db1  rep_threads  [last change: 2011/10/0703:10:39]  OK db1  rep_backlog  [last change: 2011/10/0703:10:39]  OK: Backlog is null

 

 

 

 

7。測試

在DB1，DB2，DB3上查看ip綁定：

 

 

 

[root@centos6 mysql-mmm-2.2.1]# ip add list 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN     link/loopback00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8scope host lo     inet6 ::1/128scope host        valid_lft forever preferred_lft forever 2: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000     link/ether00:0c:21:68:85:11 brd ff:ff:ff:ff:ff:ff     inet 192.168.20.156/24brd 192.168.20.255 scope global eth3     inet 192.168.20.11/32scope global eth3                                              #192.168.20.11被綁定在這裏那麼你訪問192.168.20.11就是訪問該數據庫，其餘IP都是一樣道理     inet 192.168.20.12/32scope global eth3     inet6 fe80::20c:21ff:fe68:8511/64scope link        valid_lft forever preferred_lft forever

 

 

 

用192.168.20.11登陸寫入數據。如用192.168.20.12,13,14能查當作功。

 

 

把當前write主機down掉。

用ip add list 查看備份maste主機  192.168.20.11 write IP綁定在該機上成功。

查看slave DB3主機，：

mysql> show slave status\G *************************** 1. row ***************************                Slave_IO_State: Waitingformaster to send event                   Master_Host: 192.168.20.156                              # DB2IP  slave的master已經自動切換                   Master_User: replication                   Master_Port: 3306                 Connect_Retry: 60               Master_Log_File: mysql-bin.000003           Read_Master_Log_Pos: 508                Relay_Log_File: centos6-relay-bin.000002                 Relay_Log_Pos: 251         Relay_Master_Log_File: mysql-bin.000003              Slave_IO_Running: Yes             Slave_SQL_Running: Yes               Replicate_Do_DB:           Replicate_Ignore_DB:            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: 508               Relay_Log_Space: 408               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 rowinset(0.00 sec)

 

從新UP DB1數據庫改被定爲read主機 ，只有DB2 down了纔會切換

8.數據恢復

1.當數據庫宕機或是服務出現問題是從新啓動服務器，若是mysql能正常提供服務器時，數據不用處理，會自動同步。

 

2.若是數據庫完全不能提供服務，須要從新安裝mysql時。數據恢復也就是從新配置slave。在有數據動態時配置mysql主從同步步驟以下：

 

*.鎖表命令： flush tables with read lock;                         //鎖住同步數據庫，清空寫入操做。而且禁止寫入操做，容許read操做。

解鎖命令：unlock tables;

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