mysql 同步实现， master-salve

mysql1 : 192.168.6.4    //master
mysql2 : 192.168.6.5    //slave

安装步骤
1. 分别在两台机器上安装mysql-server
shell > apt-get install mysql-server
2.修改 mysql1 master 的配置文件
vim /etc/mysql/my.cnf
找到 bind-address = 127.0.0.1
改为 bind-address = 0.0.0.0
找到
＃server-id               = 1
＃log_bin                 = /var/log/mysql/mysql-bin.log
去掉 注释符号
server-id               = 1
log_bin                 = /var/log/mysql/mysql-bin.log
default-character-set   = utf8     #新加上的为了保持编码一至防止出错

3.改好后保存退出，然后建立一个slave服务器的用户账号
root@msyql1:/# mysql -uroot -p

mysql> grant replication slave,replication client on *.* to ludy@'192.168.6.5' identified by 'ypmwbg';
mysql > grant replication slave on *.* to ludy@192.168.6.5 identified by 'ypmwbg';     //给予权限
到这里要注意了，我的两台数据库都是空的.

重启mysql服务

4.修改 mysql2 服务器slave的 my.cnf配置文件
找到 bind-address            = 127.0.0.1
替换 bind-address            = 0.0.0.0
找到
＃server-id               = 1
＃log_bin                 = /var/log/mysql/mysql-bin.log
把 注释符号去掉 改为如下

server-id               = 2
master-host             = 192.168.6.4
master-user             = ludy
master-password         = ypmwbg
master-port             = 3306

replicate-do-db=vbb 告诉slave只做vbb数据库的更新
log_bin                 = /var/log/mysql/mysql-bin.log
log-slave-updates
skip-slave-start
配置完后 重新启动mysql

然后进入 mysql1 master 服务器
root@msyql:~# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.0.51a-3ubuntu5.4-log (Ubuntu)

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 |      98 |              |                  |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

记录下来以后 进入 mysql2 slave mysql

root@msyql2:~# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.0.51a-3ubuntu5.4-log (Ubuntu)

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> change master to master_log_file='mysql-bin.000001', master_log_pos=98;

//这个地方就是记录下来的 mysql1 master 的数据

mysql > start slave; //启动slave 服务

mysql > show slave status\G
*************************** 1. row ***************************
             Slave_IO_State: Waiting for master to send event
                Master_Host: 192.168.6.4
                Master_User: ludy
                Master_Port: 3306
              Connect_Retry: 60
            Master_Log_File: mysql-bin.000001
        Read_Master_Log_Pos: 181
             Relay_Log_File: mysqld-relay-bin.000003
              Relay_Log_Pos: 235
      Relay_Master_Log_File: mysql-bin.000001
           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: 181
            Relay_Log_Space: 235
            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
1 row in set (0.01 sec)

哈哈      Slave_IO_Running: Yes
          Slave_SQL_Running: Yes

说明启动成功
然后在 master 新建 一个数据库看看

root@msyq1l:/# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 5.0.51a-3ubuntu5.4-log (Ubuntu)

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

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

在 salve 查看看是否同步
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| chenggong          |   //同步了哈哈 ～
| mysql              |
| test               |
+--------------------+
4 rows in set (0.01 sec)


好了就写这么多，如果你作 master－slave 的时候 你的master 数据里有数据那么
你必须 在 我写的 第三步与第四步中加入一下步骤：

接 上文第三步进入master数据库的Mysql控制台执行
mysql >FLUSH TABLES WITH READ LOCK; //锁表
然后从新打开一个 终端 拷贝 master 的所有的数据到 slave 服务器覆盖
读取 master 二进制文件与偏移量
mysql > show master status;
同样 要记录下 file 与 position 的值
然后解锁
mysql > unlock tables;

本文转自holy2009 51CTO博客，原文链接:http://blog.51cto.com/holy2010/461049