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大型⽹网站之MyCat对MySQL实现读写分离

分类: IT文章 • 2024-03-04 11:44:38
/* MyCat简介 */ MyCat下载
  MyCAT是⼀一个开源软件,⾯面向企业的“⼤大型数据库集群”. MyCAT是⼀一个数据库中间件,它是MySQL的
替代品,⽀支持事务和ACID作为企业数据库的MySQL集群,MyCAT可以取代昂贵的Oracle集群,MyCAT也
是⼀一种新型数据库,它看起来像是⼀一个集成了了内存缓存技术,NoSQL技术和HDFS⼤大数据的SQL Server.
  ⽽而作为⼀一种新型的现代企业数据库产品, MyCAT与传统的数据库和新的分布式数据仓库相结合. 总
之MyCAT是⼀一个全新的数据库中间件.Mycat的⽬目标是以低成本顺利利地将当前的独⽴立数据库和应⽤用程序
迁移到云端,并解决数据存储和业务规模快速增⻓长带来的瓶颈问题
 
 
 
/* 环境准备 */
 
 
 
/* MySQL主从复制 */
 
system：CentOS 7.5
mysql:
192.168.13.21
192.168.13.22
 
mycat:
192.168.13.20
 
.7 主从复制
https://dev.mysql.com/get/mysql80-community-release-el7-
1.noarch.rpm
 
https://dev.mysql.com/get/mysql80-community-release-el7-
1.noarch.rpm
$ yum -y install mysql-community-server
$ systemctl start mysqld && systemctl enable mysqld
 
##------------------------------------主库设置----------------------------
--------##
[root@master ~]# vi /etc/my.cnf //开启⼆二进制⽇日志并设置服务ID
[mysqld]
server-id=21
 
 
log-bin=mysql-bin
 
[root@master ~]# systemctl start mysqld && systemctl enable mysqld
[root@master ~]# grep 'password' /var/log/mysqld.log
2018-09-28T01:53:04.173732Z 1 [Note] A temporary password is generated for
root@localhost: ied,1qj(y/gH //注意修改密码
 
[root@master ~]# mysql -uroot -p'(BavDu..0928)'
 
mysql> CREATE USER 'replication'@'192.168.13.22' IDENTIFIED BY
Query OK, 0 rows affected (0.01 sec)
 
mysql> GRANT REPLICATION SLAVE ON *.* TO 'replication'@'192.168.13.22';
Query OK, 0 rows affected (0.00 sec)
 
mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+----------
---------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
Executed_Gtid_Set |
+------------------+----------+--------------+------------------+----------
---------+
| mysql-bin.000002 | 877 | | |
|
+------------------+----------+--------------+------------------+----------
---------+
1 row in set (0.00 sec)
 
##------------------------------------主库设置----------------------------
--------##
 
##------------------------------------从库设置----------------------------
--------##
[root@slave ~]# vi /etc/my.cnf
[mysqld]
server_id=22
 
[root@slave ~]# systemctl start mysqld && systemctl enable mysqld
[root@slave ~]# grep 'password' /var/log/mysqld.log
2018-09-28T02:07:33.890742Z 1 [Note] A temporary password is generated for
root@localhost: dFS:z5DQ/<h5
[root@slave ~]# mysql -uroot -p'(BavDu..0928)'
 
mysql> CHANGE MASTER TO
-> MASTER_HOST='192.168.13.21',
-> MASTER_USER='replication',
..0928#',
-> MASTER_LOG_FILE='mysql-bin.000001',
 
 
 
 
/* 安装MyCat */
 
-> MASTER_LOG_POS=877;
 
mysql> start slave;
mysql> show slave status;
mysql> show slave statusG;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.13.21
Master_User: replication
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 1206
Relay_Log_File: slave-relay-bin.000002
Relay_Log_Pos: 649
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
##------------------------------------从库设置---------------------------
---------##
 
#构建Java环境
[root@mycat ~]# tar xf jdk-8u181-linux-x64.tar -C /usr/local/
[root@mycat ~]# mv /usr/local/jdk1.8.0_181 /usr/local/java
 
[root@mycat ~]# vim /etc/profile
export JAVA_HOME=/usr/local/java
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
 
[root@mycat ~]# java -version
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
 
#安装MyCat服务
http://dl.mycat.io/1.6.5/Mycat-server-1.6.5-release-
20180122220033-linux.tar.gz
[root@mycat ~]# tar xf Mycat-server-1.6.5-release-20180122220033-
linux.tar.gz -C /usr/local/
 
[root@mycat mycat]# vim /etc/profile
export MYCAT_HOME=/usr/local/mycat
[root@mycat mycat]# source /etc/profile
[root@mycat mycat]# ln -s /usr/local/mycat/bin/mycat /usr/bin/mycat
 
 
[root@mycat ~]# vim /usr/local/mycat/conf/server.xml
 
<system>
 
</system>
 
</user>
 
</user>
</mycat:server>
 
[root@mycat ~]# vim /usr/local/mycat/conf/schema.xml
 
 
</schema>
 
 
<heartbeat>select user()</heartbeat>
</writeHost>
</dataHost>
</mycat:schema>
 
[root@mycat ~]# vim /usr/local/mycat/conf/wrapper.conf
wrapper.java.command=%JAVA_HOME%/bin/java
 
 
 
 
/* 测试MyCat读写分离 */
 
 
 
[root@mycat ~]# /usr/local/mycat/bin/mycat start
 
[root@mycat ~]# yum -y install mariadb
 
[root@mycat mycat]# mysql -uroot -p'(BavDu..0928)' -h192.168.13.20 -P8066 -
DTEST_DB
Welcome to the MariaDB monitor. Commands end with ; or g.
Your MySQL connection id is 5
Server version: 5.6.29-mycat-1.6.5-release-20180122220033 MyCat Server
(OpenCloundDB)
 
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
 
Type 'help;' or 'h' for help. Type 'c' to clear the current input
statement.
 
MySQL [TEST_DB]> show databases;
+----------+
| DATABASE |
+----------+
| TEST_DB |
+----------+
1 row in set (0.00 sec)
 
MySQL [TEST_DB]> use TEST_DB
Database changed
MySQL [TEST_DB]> create table testtest (id bigint not null primary key,
user_id varchar(100), travel_date date, fee decimal, days int);
Query OK, 0 rows affected (0.13 sec)
 
MySQL [TEST_DB]> insert into testtest (id,user_id,travel_date,fee,days)
values (1,'100', 20160816, 2000, 5);
Query OK, 1 row affected (0.49 sec)
 
MySQL [TEST_DB]> insert into testtest (id,user_id,travel_date,fee,days)
values (2,'300', 20160916, 5000, 3);
Query OK, 1 row affected (0.05 sec)
 
MySQL [TEST_DB]>

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