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mysql 5.5 环境用的数据库可的多实例
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mysql 主从复制原理图
mysql 主从复制开始配置 环境是一个数据库多个实例 3306端口为主 3307端口为从
1 开始配置主库和从库的my.cnf配置文件
配置主数据库的my.cnf文件（3306）
server-id = 1
log-bin=mysql-bin
配置从数据库的my.cnf文件（3307）
server-id = 2
#log-bin=mysql-bin
然后重启数据库
2登录主数据库给从数据库分配权限用户
grant replication slave on *.* to 'repl'@'192.168.1.17' identified by '123456';
3 锁表并且导出主库里的数据
flush table with read lock;
show master status;查看bin-log的位置状态
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000009 | 264 | | |
+------------------+----------+--------------+------------------+
/usr/local/mysql/bin/mysqldump -uroot -plampol -S /tmp/mysql3306.sock --events -A -B > /tmp/master.sql;
4 进从数据库导入主数据库的数据
source /tmp/master.sql
5进从库执行
change master to master_host='192.168.1.17',
master_port=3306,
master_user='repl',
master_password='123456',
master_log_file='mysql-bin.000009',
master_log_pos=264;
6 从库开启同步开关 start slave
show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.17
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000009
Read_Master_Log_Pos: 500
Relay_Log_File: bogon-relay-bin.000002
Relay_Log_Pos: 489
Relay_Master_Log_File: mysql-bin.000009
Slave_IO_Running: Yes
Slave_SQL_Running: Yes //两个yes就ok了主从配置成功
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: 500
Relay_Log_Space: 645
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:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
