Mysql 5.7主主备份配置（原创）

作者：肖宝仲
微博：http://weibo.com/u/1469563902
原文link: http://blog.csdn.net/xiaobaozhong/article/details/52523731
转载请留名

1. 主要配置步骤

主库配置步骤：

1、GRANT创建用户并授权，ip为从服务器的ip,本句含义是为创建一个用户名为uname，密码为upwd的用户，这个用户只能从192.168.1.111上进行访问

mysql> grant replication slave on *.* to 'repl_user'@'192.168.3.115' identified by 'zcxc123';2 Query OK, 0 rows affected (0.01 sec)

2、修改my.cnf配置文件如下:

   log-bin=mysql-bin  #启动二进制文件  2 server_id=1     #服务器ID 

3、重启mysql
此时可以查看主服务器binlog日志position值 

mysql> show master status\G*************************** 1. row ***************************             File: mysql-bin.000080         Position: 154     Binlog_Do_DB:  Binlog_Ignore_DB: Executed_Gtid_Set: 1 row in set (0.00 sec)

4、锁定所有表
mysql>  FLUSH  TABLES  WITH  READ  LOCK; 
5、备份表
[root@localhost  mysql]#  mysqldump  -uroot  -p  --all-databases  -l  -F  >all_db.sql 
6、解锁
mysql>  UNLOCK  TABLES; 
7、把数据传到从库(192.168.3.115)
#  scp  all_db.sql  root@192.168.1.111:/tmp 

从库配置步骤：
1、修改从服务器my.cnf配置文件  

 log_bin  =  mysql   server_id  =  2

2、重启mysql服务器

service  mysqld  restar

3、导入主备份文件

#  mysql  -uroot  -p  </tmp/all_db.sql 

4、同步binlog日志

mysql> reset slave;Query OK, 0 rows affected (0.00 sec)

注：master_user='repl_user',master_password='zcxc123' 是主库第一步 grant replication 语句设置的   master_log_file='mysql-bin.000080',master_log_pos=154  是主库第三步show master status\G语句获取的mysql> change master to master_host='192.168.3.116',master_user='repl_user',master_password='zcxc123',master_log_file='mysql-bin.000080',master_log_pos=154;Query OK, 0 rows affected, 2 warnings (0.03 sec)mysql> start slave;Query OK, 0 rows affected (0.02 sec)

主主配置就是，按照以上步骤，把上面从库按主库配置一遍。再配置时 不用备份表了。

2. 配置文件

配置文件1

-bash-4.1# more /etc/my.cnf# For advice on how to change settings please see# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html[mysqld]## Remove leading # and set to the amount of RAM for the most important data# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.# innodb_buffer_pool_size = 128M## Remove leading # to turn on a very important data integrity option: logging# changes to the binary log between backups.# log_bin## Remove leading # to set options mainly useful for reporting servers.# The server defaults are faster for transactions and fast SELECTs.# Adjust sizes as needed, experiment to find the optimal values.# join_buffer_size = 128M# sort_buffer_size = 2M# read_rnd_buffer_size = 2Mdatadir=/var/lib/mysqlsocket=/var/lib/mysql/mysql.sockvalidate_password=OFFserver-id=1user=mysqllog-bin=mysql-binlog-slave-updatesslave-skip-errors=allsync_binlog=1auto-increment-increment = 1auto-increment-offset = 1# Disabling symbolic-links is recommended to prevent assorted security riskssymbolic-links=0relay_log=/var/lib/mysql/mysql-relay-binlog-error=/var/log/mysqld.logpid-file=/var/run/mysqld/mysqld.pid-bash-4.1# 

配置文件2
-bash-4.1# more /etc/my.cnf

# For advice on how to change settings please see# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html[mysqld]## Remove leading # and set to the amount of RAM for the most important data# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.# innodb_buffer_pool_size = 128M## Remove leading # to turn on a very important data integrity option: logging# changes to the binary log between backups.# log_bin## Remove leading # to set options mainly useful for reporting servers.# The server defaults are faster for transactions and fast SELECTs.# Adjust sizes as needed, experiment to find the optimal values.# join_buffer_size = 128M# sort_buffer_size = 2M# read_rnd_buffer_size = 2Mdatadir=/var/lib/mysqlsocket=/var/lib/mysql/mysql.sockvalidate_password=OFFserver-id=2log-bin=mysql-binlog-slave-updatesslave-skip-errors=allsync_binlog=1auto_increment_increment=2auto_increment_offset=1# Disabling symbolic-links is recommended to prevent assorted security riskssymbolic-links=0relay_log=/var/lib/mysql/mysql-relay-binlog-error=/var/log/mysqld.logpid-file=/var/run/mysqld/mysqld.pid