MySQL-（Master-Slave）配置

1、两台机器，安装好版本一致的MySQL

　　192.168.29.128 （master）　　MySQL-5.6.21

　　192.168.29.129 （slave）　　　MySQL-5.6.21

2、配置master

　　配置binary log和server ID

[root@Luxh-01 ~]# vi /etc/my.cnf

　　配置如下：

 [mysqld]
 log-bin=mysql-bin
 server-id=1

　　重启MySQL

3、配置slave

[mysqld]
server-id=2

4、在master上创建用于复制的账号

mysql> create user 'repl'@'%' identified by '';
Query OK, 0 rows affected (0.13 sec)

mysql> grant replication slave on *.* to 'repl'@'%' ;
Query OK, 0 rows affected (0.02 sec)

5、在master上查看 binary log文件名和 position

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000003 |      120 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

6、配置slave

mysql> change master to master_host='192.168.29.128',master_user='repl',master_password='',master_port=3306,master_log_file='mysql-bin.000003',master_log_pos=120,master_connect_retry=10;
Query OK, 0 rows affected, 2 warnings (0.30 sec)

　　使用上面创建的用于复制的账号，master_log_file使用master上查询出来的文件名，master_log_pos也必须使用master上查询出来的position

7、在slave上启动复制功能

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

8、查看slave的状态

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.29.128
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 10
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 120
               Relay_Log_File: Luxh-02-relay-bin.000002
                Relay_Log_Pos: 283
        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: 120
              Relay_Log_Space: 458
              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: 9567210c-684f-11e4-b062-000c29398b4c
             Master_Info_File: /var/lib/mysql/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)

9、配置完毕。测试一下效果。

　　1）在master上执行以下语句

mysql> create database web_db;
Query OK, 1 row affected (0.04 sec)

mysql> use web_db;
Database changed
mysql> create table t_user(id int primary key auto_increment,username varchar(32));
Query OK, 0 rows affected (0.13 sec)

mysql> insert into t_user(username) values('lihuai');
Query OK, 1 row affected (0.05 sec)

mysql> select * from t_user;
+----+----------+
| id | username |
+----+----------+
|  1 | lihuai   |
+----+----------+
1 row in set (0.00 sec)

　　2）在slave上查看，看是否已成功复制

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
| web_db             |
+--------------------+
5 rows in set (0.05 sec)

mysql> use web_db;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> show tables;
+------------------+
| Tables_in_web_db |
+------------------+
| t_user           |
+------------------+
1 row in set (0.00 sec)

mysql> select * from t_user;
+----+----------+
| id | username |
+----+----------+
|  1 | lihuai   |
+----+----------+
1 row in set (0.00 sec)

10、以上配置是针对全新安装的MySQL服务器做主从复制，还可以针对已有数据的数据库、或者已有的主从结构上再添加slave

　　具体配置，可以参考官网文档，非常详细。

　　http://dev.mysql.com/doc/refman/5.6/en/replication-howto.html