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MysqL主从复制
实验环境
主：192.168.110.33
从：192.168.110.59
iptables and selinux disabled
主：云服务器端
1.安装并初始化
# yum install -y MysqL -MysqL-server
#/etc/init.d/MysqL start
# MysqL_secure_installation #设置root密码
Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
... Success!
Remove anonymous users? [Y/n] y
disallow root login remotely? [Y/n] y
Remove test database and access to it? [Y/n] y
Reload privilege tables Now? [Y/n] y
# id MysqL
uid=27(MysqL) gid=27(MysqL) groups=27(MysqL)
# cp /usr/share/MysqL/my-medium.cnf /etc/my.cnf
57 server-id = 1 #id唯一
59 binlog-do-db = test #指定同步test数据库
60 binlog-ignore-db = MysqL #避免同步 MysqL 数据库,以免不必要的麻烦
3.创建同步账户并授权
# MysqL -p密码
MysqL> create database test;
Query OK, 1 row affected (0.00 sec)
MysqL> use test;
MysqL> create table MysqL( username varchar(25) not null, password varchar(25) not null);
+----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+-------------+------+-----+---------+-------+
| username | varchar(25) | NO | | NULL | |
| password | varchar(25) | NO | | NULL | |
+----------+-------------+------+-----+---------+-------+
MysqL> insert into MysqL value('girl',123)；
MysqL> insert into MysqL value('boy',123) ;
+----------+----------+
| username | password |
+----------+----------+
| girl | 123 |
| boy | 123 |
+----------+----------+
MysqL> GRANT REPLICATION SLAVE,RELOAD,SUPER ON *.* TO cyl@'192.168.110.%' IDENTIFIED BY 'cyl&647308';
MysqL> flush privileges;
MysqL> quit
Bye
3.备份test数据库并发送二进制日志到从
[root@cyl_test1 MysqL]# pwd
/var/lib/MysqL
# file MysqL-bin.000003
MysqL-bin.000003: MysqL replication log
# MysqLdump -p'cyl&647308' test > test.sql或
#MysqLdump -p'数据库密码' test > test.sql
# scp test.sql MysqL-bin.000003 192.168.110.59:
从:客户端
# yum install -y MysqL -MysqL-server
#/etc/init.d/MysqL start
# MysqL_secure_installation #设置root密码
Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
... Success!
Remove anonymous users? [Y/n] y
disallow root login remotely? [Y/n] y
Remove test database and access to it? [Y/n] y
Reload privilege tables Now? [Y/n] y
# vim /etc/my.cnf
server-id = 2 #id唯一
# id MysqL
uid=27(MysqL) gid=27(MysqL) groups=27(MysqL)
# MysqL -ucyl -p'cyl&647308' -h 192.168.110.33
MysqL> show databases; #若没有test数据库手动创建
+--------------------+
| Database |
+--------------------+
| information_schema |
| MysqL |
| test |
+--------------------+
MysqL> quit
Bye
3.将数据库导入，登录数据库看到数据同步成功（在服务端发送二进制文件的位置）
# MysqL -p'cyl&647308' test<test.sql 或
#MysqL -p'数据库密码' test < test.sql
# MysqL -p密码
MysqL> use test;
MysqL> show tables;
+----------------+
| Tables_in_test |
+----------------+
| MysqL |
+----------------+
+----------+----------+
| username | password |
+----------+----------+
| girl | 123 |
| boy | 123 |
+----------+----------+
主：服务端
在服务端查看master的状态
MysqL> show master status;
+------------------+----------+--------------+------------------+
| File | Position | binlog_Do_DB | binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| MysqL-bin.000003 | 1834 | test | MysqL |
+------------------+----------+--------------+------------------+
从：客户端
在客户端设置允许服务端同步数据
# MysqL -p
MysqL> stop slave;
MysqL> change master to master_host='192.168.110.33', master_user='cyl',master_password='cyl&647308', master_log_file='MysqL-bin.000003',master_log_pos=1834; #此用户为master端授权的同步用户
MysqL> start slave;
MysqL> show slave status\G;
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.110.33
Master_User: cyl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: MysqL-bin.000003
Read_Master_Log_Pos: 1834
Relay_Log_File: MysqLd-relay-bin.000002
Relay_Log_Pos: 251
Relay_Master_Log_File: MysqL-bin.000003
Slave_IO_Running: Yes
Slave_sql_Running: Yes
主：服务端
改动数据库数据观察从是否同步
# MysqL -p密码
MysqL> use test;
MysqL> insert into MysqL value ('love',123);
+----------+----------+
| username | password |
+----------+----------+
| girl | 123 |
| boy | 123 |
| love | 123 |
+----------+----------+
从：客户端
# MysqL -p密码
MysqL> use test;
+----------+----------+
| username | password |
+----------+----------+
| girl | 123 |
| boy | 123 |
| love | 123 |
+----------+----------+
主：服务端
MysqL> delete from MysqL where username='love';
从：客户端
+----------+----------+
| username | password |
+----------+----------+
| girl | 123 |
| boy | 123 |
+----------+----------+
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