mysql主从复制
主从复制步骤1：开启主库binlog功能
查看3306是否开启
greplog-bin /etc/my.cnf
查看是否不一样
2：确保server-id 不同
grep server-id /etc/my.cnf
grep server-id /data/3307/my.cnf
3：主库授权 复制的用户rep
grant replication slave on *.* to rep@'192.168.1.102' identified by '2017';
查看是否授权成功
4：锁表，查看binlog 位置点
先锁表 保证数据库一致
flush table with read lock;
showmaster status; 看看备份点
showmaster status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000053 | 339 | | |
+------------------+----------+--------------+------------------+
5.新开窗口导出全备
mysqldump -uroot -p2017 -A -B --events -S /tmp/mysql.sock|gzip >/home/chaofu/rep_bak_$(date +%F).sql.gz
6: unlock table 解除锁表
从库：
1：确保server-id 不同
2：把主库的数据恢复到 从 库
gzip -drep_bak.sql.gz
mysql -uroot -p -S /data/3307/mysql.sock < /home/chaofu/rep_bak_2017-11-21.sql
3:找位置点,配置master.info
CHANGE MASTER TO
MASTER_HOST='192.168.1.102',
MASTER_PORT=3306,
MASTER_USER='rep',
MASTER_PASSWORD='2017',
MASTER_LOG_FILE='mysql-bin.000053',
MASTER_LOG_POS=339;
find /data/3307/data -type -f -name "*.info"
4: 开启 备份开关
start slave;
show slave status \G;
从库两个线程
5：测试
主从复制原理图
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