环境说明
主库是111.111.111.110 从库为111.111.111.111
1. 主库创建数据库复制专用用户
--在主库上执行,创建用户repl
1 [mysqld] 2 3 datadir=/var/lib/mysql 4 5 socket=/var/lib/mysql/mysql.sock 6 7 user=mysql 8 9 log-bin=mysql-bin 10 11 old_passwords=1 12 13 server_id = 110 14 15 sync_binlog = 1 16 17 relay_log = /var/lib/mysql/mysql-relay-bin 18 19 # enable log_slave_updates 20 21 log_slave_updates = 1 22 23 skip_slave_start 24 25 [mysqld_safe] 26 27 log-error=/var/log/mysqld.log 28 29 pid-file=/var/run/mysqld/mysqld.pid
修改主库参数如下
vi /etc/my.cnf
1 [mysqld] 2 3 datadir=/var/lib/mysql 4 5 socket=/var/lib/mysql/mysql.sock 6 7 user=mysql 8 9 log-bin=mysql-bin 10 11 old_passwords=1 12 13 server_id = 110 14 15 sync_binlog = 1 16 17 relay_log = /var/lib/mysql/mysql-relay-bin 18 19 # enable log_slave_updates 20 21 log_slave_updates = 1 22 23 skip_slave_start 24 25 [mysqld_safe] 26 27 log-error=/var/log/mysqld.log 28 29 pid-file=/var/run/mysqld/mysqld.pid
2.关闭数据库
--在主库上执行
1 service mysqld stop
3.备份主库
--在主库上执行
1 tar zcvf /tmp/mysql.tar.gz /var/lib/mysql
4.将主库的备份传送到从库
--在主库上执行
rsync -auzvP --bwlimit=10240 /tmp/mysql.tar.gz 111.111.111.111: /tmp/mysql.tar.gz
rsync –auzvP --bwlimit=1024 /etc/my.cnf 111.111.111.111:/etc/my.cnf
5.在备库恢复主库的备份
--在备库执行
1 mv /var/lib/mysql /var/lib/mysqlbak 2 3 mv /tmp/mysql.tar.gz /var/lib/ 4 5 tax xvf /var/lib/mysql.tar.gz
6.在备库修改配置文件/etc/my.cnf
--在备库执行
--修改配置文件/etc/my.cnf
vi /etc/my.cnf
修改参数如下
1 [mysqld] 2 3 server_id = 111
7.在备库启动数据库
--在备库执行
service mysqld start
8.在主库上启动数据库
1 service mysqld start 2 3 mysql –uroot –p 4 5 show master status;
9.根据上一步获取到的bin log文件名和position，在备库启用复制
--在备库执行（将命令master_log_file='mysql-bin.0000099',master_log_pos=5中的值mysql-bin.0000099和0 修改为上一步获取到的值）
1 change master to master_host='111.111.111.110', 2 3 master_user='repl', 4 5 master_password='repl', 6 7 master_log_file='mysql-bin.00000xx', 8 9 master_log_pos=0;
--启动复制进程
1 start slave;
2
3 show slave statusG
4
5 show processlistG