MySQL主从复制

目录

• 1.环境规划
• 2.所有MySQL都开启binlog功能，确保所有MySQL的server-id不同
• 3.主库授权主从复制用户
• 4.主库将数据库数据做全备，然后将备份文件推送到从库
• 5.从库将备份文件恢复到数据库
• 6.从库上找到binlog位置点
• 7.从库配置主从复制参数
• 8.主库创建数据库，然后到从库验证数据是否同步

1.环境规划

主机名	角色	IP地址
db01	MySQL主库	10.0.0.51
db02	MySQL从库	10.0.0.52

2.所有MySQL都开启binlog功能，确保所有MySQL的server-id不同

主库：
[mysqld]
basedir=/application/mysql
datadir=/application/mysql/data
socket=/application/mysql/tmp/mysql.sock
port=3306
server_id=10
log-error=/var/log/mysql.log
log-bin=/data/binlog/mysql-bin
sync_binlog=1
binlog_format=row

从库：
[mysqld]
basedir=/application/mysql
datadir=/application/mysql/data
socket=/application/mysql/tmp/mysql.sock
port=3306
server_id=11
log-error=/var/log/mysql.log
log-bin=/data/binlog/my-bin
sync_binlog=1
binlog_format=row

3.主库授权主从复制用户

mysql> grant replication slave on *.* to rep@'10.0.0.%' identified by '123456';

4.主库将数据库数据做全备，然后将备份文件推送到从库

[root@db01 ~]# mysqldump -uroot -p123  -A -B -R --master-data=2 --single-transaction |gzip >/backup/full_$(date +%F).sql.gz
[root@db01 ~]# scp /backup/full_2020-04-09.sql.gz  root@10.0.0.52:/backup

5.从库将备份文件恢复到数据库

[root@db02 ~]# gunzip /backup/full_2020-04-09.sql.gz
mysql> source /backup/full_2020-04-09.sql
mysql> show databases;

6.从库上找到binlog位置点

[root@db02 ~]# sed -n '22p' /backup/full_2020-04-09.sql

7.从库配置主从复制参数

mysql> change master to
    -> master_host='10.0.0.51',    
    -> master_port=3306,
    -> master_user='rep',  
    -> master_password='123456',
    -> master_log_file='mysql-bin.000008',  
    -> master_log_pos=1100;
mysql> start slave;
mysql> show slave statusG

8.主库创建数据库，然后到从库验证数据是否同步

db01：
mysql> create database test1;

db02：
mysql> show databases;