mysql 5.7 主主配置文件_MySQL 5.7主主备份配置

MySQL 5.7主主备份配置

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

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 = 2M

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

validate_password=OFF

server-id=1

user=mysql

log-bin=mysql-bin

log-slave-updates

slave-skip-errors=all

sync_binlog=1

auto-increment-increment = 1

auto-increment-offset = 1

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

relay_log=/var/lib/mysql/mysql-relay-bin

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

-bash-4.1#

配置文件2