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 程式師世界 >> 數據庫知識 >> MYSQL數據庫 >> 關於MYSQL數據庫 >> mysql數據庫互為主從配置方法分享

mysql數據庫互為主從配置方法分享

編輯:關於MYSQL數據庫
mysql主從配置小記:
共有四台機器:A(10.1.10.28),B(10.1.10.29),C(10.1.10.30),D(10.1.10.31)。
配置後結果:A-C互為主從,B為A的slave,D為C的slave。

0)准備工作
在四台機器上面安裝好mysql後,創建用於同步的賬號。
添加賬戶:
復制代碼 代碼如下:
INSERT INTO user (Host,User, Password,Select_priv,Insert_priv,Update_priv,Delete_priv, Create_priv,Drop_priv) VALUES('%','test',password('test'),'Y','Y','Y','Y','Y','Y');

刷新數據庫:
復制代碼 代碼如下:
FLUSH PRIVILEGES;

1)配置A-C互為主從
修改A配置文件為:
復制代碼 代碼如下:
server-id = 1
replicate-do-db=test
replicate-do-db=test_admin
log-bin=mysql-bin
log-slave-updates
replicate-wild-do-table=test.%
replicate-wild-do-table=test_admin.%
binlog-ignore-db=mysql
slave-skip-errors=all

修改C配置文件為:
復制代碼 代碼如下:
server-id = 3
binlog-do-db=test
binlog-do-db=test_admin
log-bin=mysql-bin
log-slave-updates
replicate-wild-do-table=test.%
replicate-wild-do-table=test_admin.%
binlog-ignore-db=mysql
slave-skip-errors=all

重啟mysql是配置生效
將A設置為主:
停止同步:
復制代碼 代碼如下:
slave stop;

清空服務器master日志:
復制代碼 代碼如下:
reset master;

授權同步賬號:
復制代碼 代碼如下:
GRANT REPLICATION SLAVE ON *.* TO 'test'@'%' IDENTIFIED BY 'test';

刷新授權:
復制代碼 代碼如下:
flush privileges;

鎖定數據庫:
復制代碼 代碼如下:
flush tables with read lock;

將C設置為從:
停止同步:
復制代碼 代碼如下:
slave stop;

配置同步信息:
復制代碼 代碼如下:
CHANGE MASTER TO MASTER_HOST='10.1.10.28', MASTER_USER='test', MASTER_PASSWORD='test', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=107;

將C設置為主:
停止同步:
復制代碼 代碼如下:
slave stop;

清空服務器master日志:
復制代碼 代碼如下:
reset master;

授權同步賬號:
復制代碼 代碼如下:
GRANT REPLICATION SLAVE ON *.* TO 'test'@'%' IDENTIFIED BY 'test';

刷新授權:
復制代碼 代碼如下:
flush privileges;

鎖定數據庫:
復制代碼 代碼如下:
flush tables with read lock;

將A設置為從:
停止同步:
復制代碼 代碼如下:
slave stop;

配置同步信息:
復制代碼 代碼如下:
CHANGE MASTER TO MASTER_HOST='10.1.10.30', MASTER_USER='test', MASTER_PASSWORD='test', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=107;

2)將B設置為A的從
復制代碼 代碼如下:
server-id = 2
replicate-do-db=test
replicate-do-db=test_admin
log-bin=mysql-bin
log-slave-updates
replicate-wild-do-table=test.%
replicate-wild-do-table=test_admin.%
binlog-ignore-db=mysql
slave-skip-errors=all


重啟mysql服務
停止同步:
復制代碼 代碼如下:
slave stop;

配置同步信息:
復制代碼 代碼如下:
CHANGE MASTER TO MASTER_HOST='10.1.10.28', MASTER_USER='test', MASTER_PASSWORD='test', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=107;

啟動同步:
復制代碼 代碼如下:
slave start;

3)將D設置為C的從
復制代碼 代碼如下:
server-id = 4
replicate-do-db=test
replicate-do-db=test_admin
log-bin=mysql-bin
log-slave-updates
replicate-wild-do-table=test.%
replicate-wild-do-table=test_admin.%
binlog-ignore-db=mysql
slave-skip-errors=all

重啟mysql服務
停止同步:
復制代碼 代碼如下:
slave stop;

配置同步信息:
復制代碼 代碼如下:
CHANGE MASTER TO MASTER_HOST='10.1.10.30', MASTER_USER='test', MASTER_PASSWORD='test', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=107;

啟動同步:
復制代碼 代碼如下:
slave start;

完成之後可以創建添加數據測試一下是否可以。
下面是常見錯誤處理:

1)
change master導致的:
Last_IO_Error: error connecting to master 'repl1@IP:3306' - retry-time: 60 retries
2)
在沒有解鎖的情況下停止slave進程:
mysql> stop slave;
ERROR 1192 (HY000): Can't execute the given command because you have active locked tables or an active transaction
3)
change master語法錯誤,落下逗號
mysql> change master to
-> master_host='IP'
-> master_user='USER',
-> master_password='PASSWD',
-> master_log_file='mysql-bin.000002',
-> master_log_pos=106;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'master_user='USER',
master_password='PASSWD',
master_log_file='mysql-bin.000002' at line 3

4)
在沒有停止slave進程的情況下change master
mysql> change master to master_host=‘IP', master_user='USER', master_password='PASSWD', master_log_file='mysql-bin.000001',master_log_pos=106;
ERROR 1198 (HY000): This operation cannot be performed with a running slave; run STOP SLAVE first

5)
A B的server-id相同:
Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids;
these ids must be different for replication to work (or the --replicate-same-server-id option must be used on
slave but this does not always make sense; please check the manual before using it).
查看server-id
mysql> show variables like 'server_id';
手動修改server-id
mysql> set global server_id=2; #此處的數值和my.cnf裡設置的一樣就行
mysql> slave start;
6)change master之後,查看slave的狀態,發現slave_IO_running 為NO
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