mysql 主主+主从笔记

环境

Ubuntu 14.04.4 LTS *3 分别是master1(192.168.42.28), master2(192.168.42.29), slave1(192.168.42.33)测试下只有master1有从

配置

vim /etc/mysql/my.cnf #必要的配置[mysqld]...bind-address            = 0.0.0.0#3台主机的id分别是 1,2,3server-id               = 1 binlog-do-db=test #需要记录二进制日志的数据库.如果有多个数据库可用逗号分隔,或者使用多个binlog-do-db选项 #需要同步的数据库 replicate-do-db=test #需要进行同步的数据库.如果有多个数据库可用逗号分隔,或者使用多个binlog-do-db选项 log_bin                 = /var/log/mysql/mysql-bin.log#这很主要，不然没办法做主从log-slave-updates...

同步数据

我使用的是 innobackupex 同步，也可以mysqldump。
master1 master2 slave1都需要同步

master1 配置

#给master2权限grant replication slave,file on *.* to 'slave'@'192.168.42.29' identified by '123123';#给slave1权限grant replication slave,file on *.* to 'slave'@'192.168.42.33' identified by '123123';stop slave; show master status;+------------------+----------+--------------+------------------+| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |+------------------+----------+--------------+------------------+| mysql-bin.000007 |      723 | test         |                  |+------------------+----------+--------------+------------------+change master to master_host='192.168.42.29',master_user='slave',master_password='123123',master_log_file='mysql-bin.000008', master_log_pos=267,master_connect_retry=10; #mysql-bin.000008和267是master2的状态 #参数#master_connect_retry默认60秒，重连的时间，如果断开就60秒从试,直到链接上#master_log_pos，master_log_file为复制主机的show master status的值#启动复制start slave;#查看状态show slave status\G; *************************** 1. row ***************************               Slave_IO_State: Waiting for master to send event                  Master_Host: 192.168.42.29                  Master_User: slave                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: mysql-bin.000008          Read_Master_Log_Pos: 267               Relay_Log_File: mysqld-relay-bin.000002                Relay_Log_Pos: 253        Relay_Master_Log_File: mysql-bin.000008             Slave_IO_Running: Yes #显示YES配置成功            Slave_SQL_Running: Yes              Replicate_Do_DB: test          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: 267              Relay_Log_Space: 410              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: 0Master_SSL_Verify_Server_Cert: No                Last_IO_Errno: 0                Last_IO_Error:                Last_SQL_Errno: 0               Last_SQL_Error:   Replicate_Ignore_Server_Ids:              Master_Server_Id: 21 row in set (0.00 sec)

master2 配置

#给master2权限grant replication slave,file on *.* to 'slave'@'192.168.42.28' identified by '123123';stop slave; show master status;+------------------+----------+--------------+------------------+| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |+------------------+----------+--------------+------------------+| mysql-bin.000008 |      267 | test         |                  |+------------------+----------+--------------+------------------+change master to master_host='192.168.42.28',master_user='slave',master_password='123123',master_log_file='mysql-bin.000007', master_log_pos=723; #启动复制start slave;#查看状态show slave status\G; *************************** 1. row ***************************               Slave_IO_State: Waiting for master to send event                  Master_Host: 192.168.42.28                  Master_User: slave                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: mysql-bin.000007          Read_Master_Log_Pos: 723               Relay_Log_File: mysqld-relay-bin.000002                Relay_Log_Pos: 253        Relay_Master_Log_File: mysql-bin.000007             Slave_IO_Running: Yes            Slave_SQL_Running: Yes              Replicate_Do_DB: test          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: 723              Relay_Log_Space: 410              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: 0Master_SSL_Verify_Server_Cert: No                Last_IO_Errno: 0                Last_IO_Error:                Last_SQL_Errno: 0               Last_SQL_Error:   Replicate_Ignore_Server_Ids:              Master_Server_Id: 1

slave1 配置

stop slave; change master to master_host='192.168.42.28',master_user='slave',master_password='123123',master_log_file='mysql-bin.000007', master_log_pos=723; show slave status\G  *************************** 1. row ***************************               Slave_IO_State: Waiting for master to send event                  Master_Host: 192.168.42.28                  Master_User: slave                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: mysql-bin.000007          Read_Master_Log_Pos: 883               Relay_Log_File: mysqld-relay-bin.000002                Relay_Log_Pos: 253        Relay_Master_Log_File: mysql-bin.000007             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: 883              Relay_Log_Space: 410              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: 0Master_SSL_Verify_Server_Cert: No                Last_IO_Errno: 0                Last_IO_Error:                Last_SQL_Errno: 0               Last_SQL_Error:   Replicate_Ignore_Server_Ids:              Master_Server_Id: 1

测试

分别在master1,master2 插入数据，在查看3个主机的数据

未解决的问题

当前状态最多能有2台是主