MySQL5.7 基于GTID的多源复制

基于GTID的MySQL5.7的多源复制

主库1：192.168.1.246:3306
主库2：192.168.1.246:3307
从库1：192.168.1.246:3308

安装5.7数据库

初始化5.7数据库，与之前不一样，命令如下(--defaults-file 一定为第一个参数)
./bin/mysqld --defaults-file=/data/mysql/mysql3306/my3306.cnf --initialize --user=mysql
新登录进去后改密码，新建用户
set password for 'root'@'localhost'=password('root');

CREATE USER 'root'@'%' IDENTIFIED BY 'root';
grant all privileges on *.* to 'root'@'%';

CREATE USER 'repl'@'192.168.1.%' IDENTIFIED BY 'repl';
grant replication slave  on *.* to 'repl'@'192.168.1.%';
flush privileges;

3306端口上新建数据库db3306-新建表db_status
3307端口上新建数据库db3307-新建表db_status3307


CREATE TABLE `db_status3307` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `host` varchar(30) NOT NULL DEFAULT '',
  `port` varchar(10) NOT NULL DEFAULT '',
  `uptime_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=317 DEFAULT CHARSET=utf8;

insert into db_status3307(host,port) values('123456','3307');

搭建多源复制

把3306数据dump出，导入3308端口
/usr/local/mysql/bin/mysqldump  -uroot -proot -h127.0.0.1 -P3306 --master-data=2 --single-transaction --databases  --add-drop-database  db3306  >3306.sql
/usr/local/mysql/bin/mysql -uroot -proot -h127.0.0.1 -P3308 < 3306.sql 

配置CHANNEL 3306
CHANGE MASTER TO
    MASTER_HOST = '192.168.1.246',
    MASTER_PORT = 3306,
    MASTER_USER = 'repl',
    MASTER_PASSWORD = 'repl',
    MASTER_AUTO_POSITION = 1 FOR CHANNEL '3306';
	
start slave;
show slave status\G
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
           Retrieved_Gtid_Set: d023f67f-4a90-11e7-9eff-0800271d97b5:3
            Executed_Gtid_Set: d023f67f-4a90-11e7-9eff-0800271d97b5:1-3			

同样操作3307，数据dump出，导入3308端口
/usr/local/mysql/bin/mysqldump  -uroot -proot -h127.0.0.1 -P3307 --master-data=2 --single-transaction --databases  --add-drop-database  db3307  >3307.sql
/usr/local/mysql/bin/mysql -uroot -proot -h127.0.0.1 -P3308 < 3307.sql 
导入报错
ERROR 1840 (HY000) at line 24: @@GLOBAL.GTID_PURGED can only be set when @@GLOBAL.GTID_EXECUTED is empty.
此时3308  reset master;在执行导入
配置CHANNEL 3307
CHANGE MASTER TO
    MASTER_HOST = '192.168.1.246',
    MASTER_PORT = 3307,
    MASTER_USER = 'repl',
    MASTER_PASSWORD = 'repl',
    MASTER_AUTO_POSITION = 1 FOR CHANNEL '3307';
	
start slave for channel '3307';
show slave status\G
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
           Retrieved_Gtid_Set: 6e71bd59-4a97-11e7-ad35-0800271d97b5:9
            Executed_Gtid_Set: 6e71bd59-4a97-11e7-ad35-0800271d97b5:1-9

多源复制处理报错与单机类似

命令 都加上  for channel '3307';
跳过错误
stop slave;  
set gtid_next='6e71bd59-4a97-11e7-ad35-0800271d97b5:1';  
begin;commit;  
set gtid_next='AUTOMATIC';  
start slave; 
show slave status\G