ubuntu下的mysql主从配置：

说明：由于MySQL不同版本之间的(二进制日志)binlog格式可能会不一样，因此最好的搭配组合是Master的MySQL版本和Slave的版本相同或者更低，

Master的版本肯定不能高于Slave版本。（版本向下兼容）

mysql1 : 129.1.23.8 //master

mysql2 : 129.1.23.246 //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 slave@192.168.157.142 identified by '12345678';

mysql > grant replication slave on *.* to slave@192.168.157.142 identified by '12345678'; //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 = 129.1.10.3

master-user = slave

master-password = ******

master-port = 3306

log_bin = /var/log/mysql/mysql-bin.log

log-slave-updates

skip-slave-start

//add

master-connect-retry=60 #如果从服务器发现主服务器断掉，重新连接的时间差(秒)

replicate-do-db =test #只复制某个库

replicate-ignore-db=mysql #不复制某个库

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;

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.000009', master_log_pos=106;

//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:

Master_Host: 129.1.23.8

Master_User: sx

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000001

Read_Master_Log_Pos: 884

Relay_Log_File: mysqld-relay-bin.000001

Relay_Log_Pos: 4

Relay_Master_Log_File: mysql-bin.000001

Slave_IO_Running: No

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: 884

Relay_Log_Space: 106

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: NULL

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)

这一块有一个错误： Slave_IO_Running: No

Slave_SQL_Running: Yes

正常的话，应该是这样的：

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

Slave_IO_Running: No

解决办法：

先stop slave 再reset slave再start slave就正常了。

Slave_SQL_Running: No

解决办法：

1.首先停掉Slave服务：slave stop

2.到主服务器上查看主机状态：记录File和Position对应的值。

3.到slave服务器上执行手动同步：

change master to master_host='192.168.157.143', master_user='slave', master_password='12345678', master_port=3306, master_log_file='mysql-bin.000013', master_log_pos=106;

slave start

show slave status\G;