Mysql主从同步配置

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本地演示Mysql主从同步，在本机启动了两个实例。

如何启动多个Mysql实例

mysql主从复制出现错误的解决方法

##创建同步用户，分配复制权限

mysql> create user fxhover;  #创建fxhover用户
Query OK, 0 rows affected (0.00 sec)

mysql> grant replication slave on *.* to 'fxhover'@'%' identified by '123456';  #分配复制权限
Query OK, 0 rows affected (0.00 sec)

##修改配置文件

编辑Master的配置文件，加入：

server-id=1
log-bin=master-bin #开启
log-bin-index=master-bin.index
binlog-do-db=test #需要同步的数据库，要同步多个数据库，就多加几个replicate-db-db=数据库名

重启Master服务器，查看状态：

mysql> show master status; #查看主服务器状态
+-------------------+----------+--------------+------------------+-------------------+
| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-------------------+----------+--------------+------------------+-------------------+
| master-bin.000001 |      120 | test         |                  |                   |
+-------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

编辑Slave的配置文件，加入：

server-id=2
relay-log=slave-relay-bin
relay-log-index=slave-relay-bin.index
replicate-do-db=test 

重启Slave服务器，配置从服务器：

mysql> change master to master_host='127.0.0.1', 
    -> master_port=3306,
    -> master_user='fxhover',
    -> master_password='123456',
    -> master_log_file='master-bin.000001',
    -> master_log_pos=120;
Query OK, 0 rows affected, 2 warnings (0.07 sec)

mysql> start slave; #启动从服务器
Query OK, 0 rows affected (0.00 sec)

mysql> show slave status\G; #查看从服务器状态
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 127.0.0.1
                  Master_User: fxhover
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-bin.000002
          Read_Master_Log_Pos: 487
               Relay_Log_File: slave-relay-bin.000003
                Relay_Log_Pos: 651
        Relay_Master_Log_File: master-bin.000002
             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: 487
              Relay_Log_Space: 988
              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
                  Master_UUID: 8918e898-fb65-11e3-aa2c-db9e86c64c2c
             Master_Info_File: /usr/local/opt/mysql/data3307/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 0
1 row in set (0.00 sec)

##测试同步

在Master上创建表：

create table rep1(
	id int(11) auto_increment primary key,
	name varchar(50),
	created_at datetime default current_timestamp
);

在Master上插入数据：

mysql> insert into rep1(name) values('rep2');
Query OK, 1 row affected (0.00 sec)

查看Master数据：

mysql> select * from rep1;
+----+------+---------------------+
| id | name | created_at          |
+----+------+---------------------+
|  1 | rep2 | 2017-02-27 20:50:19 |
+----+------+---------------------+
1 row in set (0.00 sec)

查看Slave数据：

mysql> select * from rep1;
+----+------+---------------------+
| id | name | created_at          |
+----+------+---------------------+
|  1 | rep2 | 2017-02-27 20:50:19 |
+----+------+---------------------+
1 row in set (0.00 sec)

数据已成功同步过来，如果主库之前有数据，需要手动将数据导入到从库。