MySQL 主从复制搭建

环境：

master ip： 192.168.10.10
salve  ip： 192.168.10.20

1）在两台机器上面安装好mysql

2）修改master my.cnf 添加如下几行
server-id = 1
log-bin = /opt/mysql/log/mysql-bin.log
datadir = /opt/mysql/data
innodb_flush_log_at_trx_commit = 1
sync_binlog = 1

3）修改slave my.cnf 添加如下行
server-id=2
relay-log-index=salve-relay-bin.index
relay-log=slave-relay-bin
datadir=/opt/mysql/data

4）重启master 和 slave MySQL服务
service mysqld restart

5）在master上创建复制账号
mysql> GRANT REPLICATION SLAVE ON *.* TO [email protected] IDENTIFIED BY 'mysql';

6）查看master 状态
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000004 |      739 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

7）如果需要同步原有的库，还需要做如下操作，否者调到第11步
mysql> FLUSH TABLES WITH READ LOCK;      
 
 在主机上执行FLUSH TABLES WITH READ LOCK语句来刷新所有的表并阻断写操作
 
8） 使用mysqldump命令备份需要同步的数据库
[root@localhost ~]$ mysqldump -u root dbname > /home/root/dbname.sql

9）在salve上恢复数据
先将备份的sql文件复制到salve
[root@localhost ~]$ mysql -u root �Ce 'create database dbname;'
[root@localhost ~]$ mysql -u root dbname < /home/root/dbname.sql

10） salve恢复完成后重新打开master的读写功能
mysql> UNLOCK TABLES;

11）在slave上执行如下命令开始同步数据
mysql> change master to master_host='192.168.10.10',
 master_user='slave',
 master_password='mysql',
 master_log_file='mysql-bin.000004',
 master_log_pos=1790;

mysql> start slave

12) 最后在master上创建表验证

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