mysql 主从复制实验------包含授权、bin-log
环境：两台 Linux虚拟机 centos 5.5
200.168.10.10 master
200.168.10.5 slave
-------------------------
mysql 用户授权：
bin-log日志：
200.168.10.10_master:
200.168.10.5_slave:
从如果能复制主服务器的数据，就要求有访问主的权限：
所以授权是必要的。
----
[root@localhost test]# /usr/local/mysql/bin/mysql -uroot -p -h200.168.10.10
Enter password:
ERROR 1130 (HY000): Host '200.168.10.5' is not allowed to connect to this MySQL server
[root@localhost test]#
在主服务器上：
mysql> grant all on *.* to [email protected] identified by '123';
//或者:grant replication slave on *.* to [email protected] identified by '123';
在从上登录主的数据库
[root@localhost test]# /usr/local/mysql/bin/mysql -uuser -p -h200.168.10.10
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3106
Server version: 5.1.59-community-log Source distribution
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
--------------------------------------------------------------------
查看bin-log是否开启：
show variables like "%log_bin%";
reset master;之后：
[root@localhost var]# ls
ibdata1 lehand mysql-bin.000001
ib_logfile0 localhost.localdomain.err mysql-bin.index
ib_logfile1 localhost.localdomain.pid test
left_hand mysql
*
查看最后一个bin-log文件信息：
mysql> show master status;
*
**
查看bin-log的动作记录
[root@localhost var]# /usr/local/mysql/bin/mysqlbinlog --no-defaults mysql-bin.000003
**
****
通过bin-log日志恢复数据：
[root@localhost var]# /usr/local/mysql/bin/mysqlbinlog --no-defaults mysql-bin.000001 |/usr/local/mysql/bin/mysql -uroot -p test
Enter password:
[root@localhost var]#
****
reset master :清理mysql-bin文件；
flush logs； 生成一个新的bin-logs;
***
//mysql备份：
[root@localhost var]# /usr/local/mysql/bin/mysqldump -uroot -p test -l -F > test.sql
Enter password:
[root@localhost var]#
***
*
恢复方法：
用先前备份的sql文件恢复；
用bin-log日志恢复；
可以根据位置点来恢复文件：
--stop-position 348
--start-position 467
恢复操作点之间的部分数据
[root@localhost var]# /usr/local/mysql/bin/mysqlbinlog --no-defaults mysql-bin.000005 --start-position="348" --stop-position="467" |/usr/local/mysql/bin/mysql -uroot -p test
Enter password:
[root@localhost var]#
*
*****
主从复制： --另一个备份方法： 最高境界，这几个备份方法的混合使用：最后的是dump -l -F 不用考虑枷锁解锁
----在从服务器上进行查询操作。负载均衡、读写分离：（实时性要求高的话，查询不要在从服务器）
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考虑数据库的锁定
主服务器配置不变 cat /etc/my.cnf
server-id
bin-log
查看授权：
mysql> show grants for [email protected];
隧道传输：把 200.168.10.10 当前目录下的 test.sql文件 传到200.168.10.5 的test目录下
[root@localhost var]# scp test.sql 200.168.10.5:/test
从服务器：
server-id = 2
# The replication master for this slave - required
master-host = 200.168.10.10
#
# The username the slave will use for authentication when connecting
# to the master - required
master-user = user
#
# The password the slave will authenticate with when connecting to
# the master - required
master-password = 123
#
# The port the master is listening on.
# optional - defaults to 3306
master-port = 3306
重启mysql：
[root@localhost test]# /usr/local/mysql/bin/mysqld_safe --user=mysql &
关闭：
pkill mysqld
进入从自己的数据库，执行
show slave status；
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 200.168.10.10
Master_User: user
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 106
Relay_Log_File: localhost-relay-bin.000006
Relay_Log_Pos: 251
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 106
Relay_Log_Space: 453
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
1 row in set (0.00 sec)
说明已经同步的情况：
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
---
主服务器端：
mysql> show master status\G;
*************************** 1. row ***************************
File: mysql-bin.000003
Position: 106
Binlog_Do_DB:
Binlog_Ignore_DB:
1 row in set (0.00 sec)
*****
***
slave无法同步的问题：
先停掉slave
如果不同步 再看视频：
第12讲：
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