这里以2台MySQL为例进行实验：
Master库：
ip：192.168.79.134
Slave库：
ip：192.168.79.136
主库修改或增加/etc/my.cnf为：
[mysqld]
server_id=1
log-bin=mysql-bin从库增加或修改/etc/my.cnf
[mysqld]
server-id=2然后重启主库及从库
service mysqld restart在主库中增加帐号并授予权限：
CREATE USER 'rep1'@'192.168.79.136' IDENTIFIED BY 'rep1';
GRANT REPLICATION SLAVE ON *.* TO 'repl'@'192.168.79.136';
flush privileges;在主库中查看状态：
sql> SHOW MASTER STATUS;
+---------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------+----------+--------------+------------------+-------------------+
| binlog.000042 | 966 | | | |
+---------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)从中可以看到主库中Master中对应的binlog为binlog.000042，其中position为996。
随后在从库中进行配置
mysql> CHANGE MASTER TO
-> MASTER_HOST='192.168.79.134',
-> MASTER_USER='rep1',
-> MASTER_PASSWORD='rep1',
-> MASTER_LOG_FILE='binlog.000042',
-> MASTER_LOG_POS=966;
Query OK, 0 rows affected, 2 warnings (0.01 sec)在从库中进行开启：
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)在从库中查看从库状态
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Connecting to master
Master_Host: 192.168.79.134
Master_User: rep1
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: binlog.000042
Read_Master_Log_Pos: 966
Relay_Log_File: relaylog.000001
Relay_Log_Pos: 4
Relay_Master_Log_File: binlog.000042
Slave_IO_Running: Connecting
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: 966
Relay_Log_Space: 154
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: 1045
Last_IO_Error: error connecting to master '[email protected]:3306' - retry-time: 60 retries: 1
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 0
Master_UUID:
Master_Info_File: /u01/mysql3306/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp: 200606 09:23:24
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)从中可以看到Slave_IO_Running为Connecting及Slave_SQL_Running为Yes就说明成功了。
下面来测试下：
在主库（192.168.79.134）中添加一个新database
mysql> create database mydatabase;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id: 5
Current database: *** NONE ***
Query OK, 1 row affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mydatabase |
| mysql |
| performance_schema |
| sys |
| zabbix |
+--------------------+
6 rows in set (0.00 sec)从库（192.168.79.136）中可以查看已经同步了主库（192.168.79.134）中的数据：
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| zabbix |
+--------------------+
5 rows in set (0.04 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mydatabase |
| mysql |
| performance_schema |
| sys |
| zabbix |
+--------------------+
6 rows in set (0.00 sec)