在一台机上搭建多个MYSQL并设置主从

安装

cd /usr/local/src/
tar zxvf /usr/local/src/mysql-5.5.-linux2.-x86_64.tar.gz
mv mysql-5.5.-linux2.-x86_64 /usr/local/mysql
grep mysql /etc/passwd
#没有则添加用户
useradd -s /sbin/nologin mysql
#添加启动路径
vim /etc/profile.d/path.sh
#!/bin/bash/
export PATH=$PATH:/usr/local/mysql/bin
cd /usr/local/mysql/
cp support-files/my-small.cnf /etc/my.cnf
cp support-files/mysql.server /etc/init.d/mysqld

修改配置文件

vim !$
basedir=/usr/local/mysql
datadir=/data/mysql

添加开机服务

chkconfig –add mysqld
mkdir -p /data/mysql ; chown -R mysql:mysql /data/mysql

编译并开启

./scripts/mysql_install_db –user=mysql –datadir=/data/mysql
/etc/init.d/mysqld start

复制mysql

cd ..
cp -r mysql mysql_slave
cd mysql_slave
cp /etc/my.cnf .

更改从配置文件

vim my.cnf
[mysqld]
port =
socket = /tmp/mysql_slave.sock
datadir =/data/mysql_slave

编译复制修改开机启动服务

./scripts/mysql_install_db –user=mysql –datadir=/data/mysql_slave
cp /etc/init.d/mysqld /etc/init.d/mysqldslave
vim /etc/init.d/mysqldslave
basedir=/usr/local/mysql_slave
datadir=/data/mysql_slave
cont=$basedir/my.cnf

设置开机启动并启动从

chkconfig –add mysqldslave
/etc/init.d/mysqldslave start
netstat -lnp |grep mysql

主增加一个测试数据库db1

mysqldump -S /tmp/mysql.sock mysql > .sql
mysql -S /tmp/mysql.sock -e “create database db1”
mysql -S /tmp/mysql.sock db1 < .sql

改主配置文件

vim /etc/my.cnf
server-id =
# Uncomment the following if you want to log updates
log-bin=junwei
#白名单
#binlog-do-db=db1,db2
#黑名单
#binlog-ignore-db=mysql

重启mysql主登陆创建授权用户更新

service mysqld restart
mysql -S /tmp/mysql.sock
grant replication slave on *.* to ‘repl’@’127.0.0.1’ identified by ‘’;
flush privileges;
flush tables with read lock;
show master status;

修改从配置文件

vim /usr/local/mysql_slave/my.cnf
server-id =
#黑名单
#replicate-ignore-db=mysql
#白名单
#replicate-do-db=mysql

从创建数据库导入数据

mysql -S /tmp/mysql_slave.sock -e “create database db1”
mysql -S /tmp/mysql_slave.sock db1< .sql

从登陆设置同步

mysql -S /tmp/mysql_slave.sock
slave stop;
change master to master_host=’127.0.0.1′, master_port=,master_user=’repl’, master_password=’′, master_log_file=’junwei.′, master_log_pos=;
quit
service mysqldslave restart
mysql -S /tmp/mysql_slave.sock
slave start;
show slave status\G;
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
#这两个选项yes说明配置成功

解锁主数据库

unlock tables;