linux下mysql主从配置

centos6.5 192.168.1.84 主机

centos6.5 192.168.1.83 从属

一、主服务器配置：

创建同步用户并指定服务器地址

[root@node04 ~]# mysql -u root -p111111
mysql>use mysql;
mysql>grant replication slave on *.* to 'tongbu'@'192.168.1.84' identified by '123456';
mysql>flush privileges #刷新权限

授权用户tongbu只能从192.168.1.83这个地址访问192.168.1.84上的数据库

修改/etc/my.cnf配置文件

[root@node04 ~]# vim /etc/my.cnf
内容：
[mysqld]
default-character-set=utf8
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
lower_case_table_names = 1
# master db config 添加的内容
log-bin=MySQL-bin #二进制日志文件
server-id=1 #服务器ID
binlog-do-db=test01 #要同步的数据库
binlog-ignore_db=mysql #不同步mysql系统数据库

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[client]
default-character-set=utf8
socket=/var/lib/mysql/mysql.sock
[root@node04 ~]# /etc/init.d/mysqld restart

查看主服务器master状态：

mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| MySQL-bin.000002 |      106 | test01       | mysql            |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

创建测试数据库进行测试：

mysql> create database test;
mysql> use test;
mysql> create table test(id INT NOT NULL AUTO_INCREMENT, name varchar(15) NOT NULL, PRIMARY KEY (id))AUTO_INCREMENT= 1 ENGINE=InnoDB DEFAULT CHARSET=utf8;
mysql>insert into test values(1, "aaa"),(2, "bbb"),(3,"ccc");
mysql> select *from test;
+----+------+
| id | name |
+----+------+
|  1 | aaa  |
|  2 | bbb  |
|  3 | ccc  |
+----+------+
3 rows in set (0.00 sec)

将这个test数据库的数据备份下来，需要先上锁

mysql> flush tables with read lock; #数据库只读锁命令 unlock table 解锁
[root@node04 ~]# mysqldump -uroot -p111111 test > /root/test.sql #导出数据库结构及数据
[root@node04 ~]# mysqldump -uroot -p111111 -ntd -R test > test_f.sql #

将test.sql发送到slave机器上

二、从服务器配置

[root@node03 ~]#vim /etc/my.cnf
[mysqld]
default-character-set=utf8
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
lower_case_table_names = 1
#slave db config 添加的内容
server-id=2 #服务器ID，与主服务器一定不相同
log-bin=MySQL-bin #二进制日志文件
binlog-do-db=test01 #同步的数据库
binlog-ignore-db=mysql #不同步mysql系统数据库

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[client]
default-character-set=utf8
socket=/var/lib/mysql/mysql.sock
[root@node03 ~]# /etc/init.d/mysqld restart

导入数据库：

[root@node04 ~]# mysqldump -uroot -p111111 test < test.sql

配置主从同步：

[root@node03 ~]# mysql -u root -p111111
mysql> use mysql
mysql> stop slave;
mysql> change master to master_host='192.168.1.84',
master_user='tongbu',
master_password='123456',
master_log_file='MySQL-bin.000001',#show master status得到的日志文件名
master_log_pos=106;
mysql> start slave;
mysql> show slave statue\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.84
Master_User: tongbu
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: MySQL-bin.000002
Read_Master_Log_Pos: 106
Relay_Log_File: mysqld-relay-bin.000006
Relay_Log_Pos: 251
Relay_Master_Log_File: MySQL-bin.000002
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: 407
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)

同步成功，进行测试：

从服务器：

mysql> use test
mysql> select *from test;
+----+------+
| id | name |
+----+------+
|  1 | aaa  |
|  2 | bbb  |
|  3 | ccc  |
+----+------+
3 rows in set (0.00 sec)

主服务器：

mysql> insert into test values(11, "xxx");
mysql> select * from test;
+----+------+
| id | name |
+----+------+
|  1 | aaa  |
|  2 | bbb  |
|  3 | ccc  |
| 11 | xxx  |
+----+------+
4 rows in set (0.01 sec)

查看从服务器：

mysql> select *from test;
mysql> select * from test;
+----+------+
| id | name |
+----+------+
|  1 | aaa  |
|  2 | bbb  |
|  3 | ccc  |
| 11 | xxx  |
+----+------+
4 rows in set (0.01 sec)

成功！！