centos7 mysql5.7主从数据迁移
1、说明
主从为rpm包安装方式，版本为mysql-5.7.18-1.el7.x86_64.rpm-bundle.tar
配置 /data/mysql_data 为数据存放目录
主从配置文件如下所示：
主服务器：
# egrep -v "^$|^#" /etc/my.cnf
[mysqld]
socket=/var/lib/mysql/mysql.sock
datadir=/data/mysql_data
character_set_server=utf8
sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
server-id=1
log-bin=mysql-bin
binlog_format=mixed
innodb_flush_log_at_trx_commit=1
sync_binlog=1
expire_logs_days=15
relay_log=mysql-realy-bin
从服务器：
# egrep -v "^$|^#" /etc/my.cnf
[mysqld]
socket=/var/lib/mysql/mysql.sock
datadir=/data/mysql_data
character_set_server=utf8
sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
server-id=2
log_bin=mysql-bin
relay_log=mysql-relay-bin
log-slave-updates=on
expire_logs_days=15
replicate-ignore-db=sys
replicate-ignore-db=mysql
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema
2、变更步骤
首先关闭主从数据库服务
修改配置文件 /etc/my.cnf ，我这里只修改下面一行
datadir=/data/mysql_data
>>
datadir=data /opt/tmp/mysql_data
然后把数据库数据目录拷贝到目标目录下，这里迁移到 /opt/tmp 目录下
# cp -a /data/mysql_data /opt/tmp/
最后启动主从mysql服务，并进行验证