mysql主从复制(超简单)

本文主要参考:
http://369369.blog.51cto.com/319630/790921/ 并对文中错误进行更正
其它参考内容:
http://blog.csdn.net/hguisu/article/details/7325124
http://pengranxiang.iteye.com/blog/1141118
推荐文档:
http://www.cnblogs.com/kristain/articles/4142970.html

服务器ip
DB1     10.10.6.211
DB2     10.10.6.212

 

1、主、从服务器安装mysql

root@DB1 ~]# yum install mysql mysql-server

2、修改主服务器配置:

[root@DB1 ~]# more /etc/my.cnf  增加如下内容
[mysqld]
log-bin=mysql-bin             \\[必须]启用二进制日志
server-id=211                 \\必须]服务器唯一ID,默认是1,一般取IP最后一段

3、修改从服务器配置:

[root@DB2 ~]# more /etc/my.cnf  增加如下内容
[mysqld]
log-bin=mysql-bin             \\[必须]启用二进制日志
server-id=212                 \\必须]服务器唯一ID,默认是1,一般取IP最后一段

4、重启两台服务器的mysql

[root@DB1 ~]# service mysqld restart

5、在主服务器上建立帐户并授权给从服务器:

[root@DB1 ~]# mysql
mysql> GRANT REPLICATION SLAVE ON *.* to 'mysync'@'10.10.6.212' identified by '123456';
Query OK, 0 rows affected (0.00 sec)
mysql>

6、登录主服务器的mysql,查询master的状态

mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 |      260 |              |                  |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
\\注:执行完此步骤后不要再操作主服务器MYSQL,防止主服务器状态值变化
mysql>

7、配置从服务器Slave:
注意下面的语句,网上有很多资料都有错误

mysql> change master to Master_host='10.10.6.211',master_user='mysync',master_password='123456',master_log_file='mysql-bin.000003',master_log_pos=260;
Query OK, 0 rows affected (0.01 sec)

\\replicate-ignore-db=mysql //不需要备份的数据库;  这两个语句可以根据实际情况
\\replicate-do-db=data //需要备份的数据库 

mysql> start slave;  \\启动从服务器复制功能
Query OK, 0 rows affected (0.00 sec)

mysql>
8、检查从服务器复制功能状态:
mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.10.6.211       \\主服务器地址
                  Master_User: mysync            \\授权帐户名,尽量避免使用root
                  Master_Port: 3306              \\数据库端口,部分版本没有此行
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 260              \\同步读取二进制日志的位置,大于等于Exec_Master_Log_Pos
               Relay_Log_File: mysqld-relay-bin.000002
                Relay_Log_Pos: 251
        Relay_Master_Log_File: mysql-bin.000003
             Slave_IO_Running: Yes              \\此状态必须YES
            Slave_SQL_Running: Yes              \\此状态必须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: 260
              Relay_Log_Space: 407
              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 row in set (0.00 sec)

mysql>
注:Slave_IO及Slave_SQL进程必须正常运行,即YES状态,否则都是错误的状态(如:其中一个NO均属错误)。

以上操作过程,主从服务器配置完成。

9、主从服务器测试:
主服务器Mysql,建立数据库,并在这个库中建表插入一条数据:

mysql> create database jedy_db; 
Query OK, 1 row affected (0.00 sec)

mysql> use jedy_db;
Database changed
mysql> create table jedy_test(id int(3),name char(10));
Query OK, 0 rows affected (0.00 sec)

mysql> insert into jedy_test values(001,'tian');
Query OK, 1 row affected (0.00 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| jedy_db            |
| mysql              |
| test               |
+--------------------+
4 rows in set (0.00 sec)

mysql>

从服务器Mysql查询:

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| jedy_db            |
| mysql              |
| test               |
+--------------------+
4 rows in set (0.00 sec)

mysql> 


mysql> use jedy_db;
Database changed
mysql> show tables;
+-------------------+
| Tables_in_jedy_db |
+-------------------+
| jedy_test         |             \\主服务器上新建的库传过来了
+-------------------+
1 row in set (0.00 sec)

mysql> select * form jedy_test;   \\可以看到在主服务器上新增的具体数据
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'form jedy_test' at line 1
mysql> select * from jedy_test;  
+------+------+
| id   | name |
+------+------+
|    1 | tian |
+------+------+
1 row in set (0.00 sec)

mysql>

posted on 2015-04-10 14:06  jedy8  阅读(173)  评论(0编辑  收藏  举报

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