CentOs MySQL 数据库主从同步配置
前提条件:
硬件要求:
1、主从服务器系统版本和版本位数一致
2、MySQL 版本一致。
服务器配置
master:120.76.112.207
slave:120.25.58.50
CentOS 安装MySQL 具体可以参考:http://blog.csdn.net/zhouzhiwengang/article/details/51701537
Master服务器配置(120.76.112.207)
编辑MySQL 配置信息
#vi /etc/my.cnf
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[root@iZ94phz01rnZ ~]# cat /etc/my.cnf
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[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 = mysql-bin
server-id = 1
user = mysql
#主从复制配置
innodb_flush_log_at_trx_commit=1
sync_binlog=1
#需要备份的数据库
binlog-do-db=test
#不需要备份的数据库
binlog-ignore-db=mysql
#不需要备份的数据库
binlog-ignore-db=information_schema
#不需要备份的数据库
binlog-ignore-db=performance_schema
# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
datadir = /db/mysql/data
#port =3306
#server_id = 120.76.112.207
#socket =
# 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
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
log_error = /var/log/mysql/error.log
#pid_file = /var/lib/mysql/mysql.pid
#开启查询缓存
#explicit_defaults_for_timestamp=true
symbolic-links=0
#innodb_force_recovery=1
提示:binlog-ignore-db 表示不需要备份的数据库 、binlog-do-db表示需要备份数据库,如果两个属性都未配置,那就默认标识同步所有的数据库。
修改配置文件信息(/etc/my.cnf),需要重启mysql 服务,才会生效。
# /etc/init.d/mysql restart 或者 #service mysql restart
为MySQL 创建同步用户
#cd /usr/local/mysql/bin (mysql 安装目录)
#mysql -u root -p (mysql 管理员登入 )
Enter PassWord
创建用户:
mysql> create user 'mastj'@'192.168.1.16' identified by '123456';
mysql> grant replication slave on *.* to 'mastj'@'192.168.1.16' identified by '123456';
查看master 状态:
mysql > show master status;
Slave(120.25.58.50)服务器配置
修改mysql 配置文件信息
#vi /etc/my.cnf
[root@iZ94qvmp90hZ ~]# cat /etc/my.cnf
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[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
user=mysql
#datadir = /db/mysql/data
# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
datadir = /db/mysql/data
# port = .....
# server_id = .....
#socket =/usr/local/mysql/mysql.sock
# 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
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
log_error = /var/log/mysql/error.log
log_bin = mysql-bin
server-id = 2
重新启动MySQL服务
# /etc/init.d/mysql restart 或者service mysql restart
执行
mysql> change master to master_host='192.168.1.18',
master_user='mastj',
master_password='123456',
master_port=3306,
master_log_file='mysql-bin.000003',
master_log_pos=2005,
master_connect_retry=10;
参数详解:
master_host:主服务器的IP。
master_user:配置主服务器时建立的用户名
master_password:用户密码
master_port:主服务器mysql端口,如果未曾修改,默认即可
master_log_file:日志文件名称,填写查看master状态时显示的File
master_log_pos:日志位置,填写查看master状态时显示的Positio
master_connect_retry:重连次数
启动数据同步线程
mysql >start slave;
简称数据同步状态:
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.18
Master_User: mastj
Master_Port: 3306
Connect_Retry: 10
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 2369
Relay_Log_File: jhq0113-relay-bin.000002
Relay_Log_Pos: 647
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
若Slave_IO_Running和Slave_SQL_Running均为Yes,则表示连接正常。
此时就可以测试主从复制了
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