两台服务器,系统是Redhat6.5,MySQL版本是5.7.18。
1、在主库上,创建复制使用的用户,并授予replication slave权限。这里创建用户repl,可以从IP为10.10.10.210的主机进行连接。
grant replication slave on *.* to 'repl'@'10.10.10.210' identified by 'mysql';
2、修改主服务器配置,加入如下配置:
cat /etc/my.cnf
[mysqld]
server-id=1
log-bin=mysql-bin
log-bin-index=mysql-bin.index
binlog_format=mixed
3、在主库上,设置读锁,确保没有数据操作,获得一个一致性的快照
flush tables with read lock;
4、然后在主库上获得当前二进制日志名和偏量值,改操作的目的是从库启动之后,从这个点开始恢复数据。
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000006 | 120 | | | |
+------------------+----------+--------------+------------------+-------------------+
5、利用mysqldump导出数据,拷贝至从库服务器。
6、主库备份完成,恢复写操作
unlock tables;
7、修改从库的配置文件,添加如下参数,注意server-id必须是唯一的,不能和主库相同,多个从库的话,server-id不能有重复。
cat /etc/my.cnf
[mysqld]
server-id=2
8、在从库上,使用--skip-slave-start启动数据库,这样不会立即启动从库上的复制进程,方便我们进行下一步配置。
./bin/mysqld_safe --skip-slave-start &
9、对从库进行配置,指定复制使用的用户,主库的IP、端口以及开始执行复制的日志文件和位置等:
change master to
master_host='10.10.10.200',
master_port=3306,
master_user='real',
master_password='mysql',
master_log_file='mysql-bin.000006',
master_log_pos=120;
10、在从库上启动slave线程
start slave;
11、在从库上查看slave状态
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.10.10.200
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000006
Read_Master_Log_Pos: 120
Relay_Log_File: mysql-relay-bin.000026
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000006
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: 120
Relay_Log_Space: 619
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:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: 4adfcd1d-4059-11e7-9532-080027d597f9
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
12、在主库进行DDL或者DML测试,在从库查看数据同步情况