一、准备环境
[root@localhost ~]# vim /etc/hosts
192.168.40.154 master1 192.168.40.129 master2
192.168.40.138 slave1 192.168.40.128 slave2
注：四台虚拟机配置都相同，且防火墙关闭
二、双主设置
master1（其数据库中提前准备点库）
1、[root@localhost ~]# vim /etc/my.cnf
log_bin
server-id=1
gtid_mode=ON
enforce_gtid_consistency=1
2、[root@localhost ~]# systemctl restart mysqld
3、授权：mysql>grant replication slave,replication client on *.* to 'rep'@'192.168.40.%' identified by 'Zjz@5740';
4、mysql> flush privileges;（刷新）
5、备份：mysqldump -p'Zjz@5740' --all-databases --single-transaction --master-data=2 --flush-logs > `date +%F`-mysql-all.sql
6、#scp -r 2017-1-1-mysql-all.sql master2:/tmp
7、观察二进制日志分割点
CHANGE MASTER TO MASTER_LOG_FILE='localhost-bin.000002', MASTER_LOG_POS=154;
master2
1、[root@localhost ~]#vim /etc/my.cnf（ 启动二进制日志，服务器ID，GTID）
log_bin
server-id=2
gtid_mode=ON
enforce_gtid_consistency=1
2、[root@localhost ~]# systemctl restart mysqld
还恢复手动同步数据
mysql>set sql_log_bin=0;
mysql>source /tmp/2017-1-1-mysql-full.sql
mysql>select * from master1db.master1tab;
3、设置主服务器
mysql> change master to
master_host='master1',
master_user='rep',
master_password='Zjz@5740',
master_auto_position=1;
start slave;
show slave status\G;
master1认master2为主
master2授权：mysql>grant replication slave,replication client on *.* to 'rep'@'192.168.40.%' identified by 'Zjz@5740';
flush privileges;（刷新）
master1:设置主服务器
mysql> change master to
master_host='master2',
master_user='rep',
master_password='Zjz@5740',
master_auto_position=1;
start slave;
show slave status\G;
mysqldump -p'Zjz@5740' --all-databases --single-transaction --master-data=2 --flush-logs > `date +%F`-mysql-all.sql
scp -r 2017-8-9-mysql-all.sql slave1:/tmp
scp -r 2017-8-9-mysql-all.sql slave2:/tmp
三、双从设置
slave1 # mysql -p'Zjz@5740' < /tmp/2017-8-9-mysql-all.sql
slave2 #mysql -p'Zjz@5740' < /tmp/2017-8-9-mysql-all.sql
启动从服务器ID，gtid
slave1 slave2
#vim /etc/my.cnf # vim /etc/my.cnf
server-id=3 server-id=4
gtid_mode=ON gtid_mode=ON
enforce_gtid_consistency=1 enforce_gtid_consistency=1
master-info-repository=TABLE master-info-repository=TABLE
relay-log-info-repository=TABLE relay-log-info-repository=TABLE
#systemctl restart mysqld #systemctl restart mysqld
设置主服务器
slave1(认两个主服务器)
mysql> change master to mysql> change master to
master_host='master1', master_host='master2',
master_user='rep', master_user='rep',
master_password='Zjz@5740', master_password='Zjz@5740',
master_auto_position=1 for channel 'master1'; master_auto_position=1 for channel 'master1';
mysql>start slave;
mysql>show slave status\G;（双yes成功）
slave2同上操作
四、总结
1、出现connettion，重启电脑试试
2、有些步骤先停止slave再操作