配置db1,db2主-主同步

1配置机器1(100)

vi /etc/my.cnf

server-id=1

log-bin= donut-1-bin

replicate-do-db = testcopy2 #在从库中的目标库

replicate-rewrite-db = testcopy-> testcopy2 #在从库中配置不同名字的数据库

replicate-ignore-db=mysql

replicate-ignore-db=information_schema

replicate-ignore-db=performance_schema

expire_logs_days= 10

max_binlog_size = 100M

auto_increment_offset = 1

auto_increment_increment = 2

skip-name-resolve

skip-slave-start

log-slave-updates  #很重要，从前一台机器上同步过来的数据才能同步到下一台机器

2配置机器2(101)

vi /etc/my.cnf

server-id=2

log-bin= testcopy-2-bin

replicate-do-db = testcopy #在从库中的目标库

replicate-rewrite-db = testcopy2 -> testcopy #在从库中配置不同名字的数据库

replicate-ignore-db=mysql

replicate-ignore-db=information_schema

replicate-ignore-db=performance_schema

expire_logs_days= 10

max_binlog_size = 100M

auto_increment_offset = 1

auto_increment_increment = 2

skip-name-resolve

skip-slave-start

log-slave-updates

3重启mysql

/etc/init.d/mysql restart

4添加复制用户

mysql -uroot -p

#授权指定网段的ip访问

GRANT REPLICATION SLAVE ON *.* TO 'testcopy'@'192.168.0.%' IDENTIFIED BY 'testcopy';

5如果已经存需要同步

mysql -uroot -p  #登录100

FLUSH TABLES WITH READ LOCK; # 锁定100

mysqldump -uroot -p -P3306 testcopy --triggers --routines --events >>~/testcopy.sql

mysql -uroot -p  -h192.168.0.101 -P3306 testcopy< ~/testcopy.sql

6100记录日志文件和pos

mysql -uroot -p;

show master status;

7db-101(101的主数据库是100)

change master to master_host ='192.168.0.100',master_port=3306,master_user='testcopy',master_password='testcopy',master_log_file='testcopy-1-bin.000001',master_log_pos= 740421;

start slave;

show slave status;

说明：testcopy-bin.000001和327是主库配置第7步记录的信息

出现以下内容，说明同步ok

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

8解锁100

unlock tables;

9如果已经存需要同步

mysql -uroot -p  #登录101

FLUSH TABLES WITH READ LOCK; # 锁定101

mysqldump -uroot -p -P3306 testcopy --triggers --routines --events >>~/testcopy.sql

mysql -uroot -p  -h192.168.0.100 -P3306 testcopy< ~/testcopy.sql

10.101记录日志文件和pos

mysql -uroot -p

show master status;

11db-100(100的主数据库是101)

change master to master_host ='192.168.0.101',master_port=3306,master_user='testcopy',master_password='testcopy',master_log_file='testcopy-2-bin.000007',master_log_pos= 35089377;

start slave;

show slave status;

说明：testcopy-bin.000001和327是主库配置第5步记录的信息

出现以下内容，说明同步ok

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

12解锁207

unlock tables;

13测试主-主同步

14EERROR 1201 (HY000)

stop slave;

reset slave;

change master to 重复上述操作， 6，7

本文为作者:CNESA于https://www.iteye.com/blog/xinyuemengxing-2340118网络转载！