/* MyCat簡介 */ MyCat下載
MyCAT是⼀一個開源軟件,⾯面向企業的「⼤大型數據庫集羣」. MyCAT是⼀一個數據庫中間件,它是MySQL的
替代品,⽀支持事務和ACID做爲企業數據庫的MySQL集羣,MyCAT能夠取代昂貴的Oracle集羣,MyCAT也
是⼀一種新型數據庫,它看起來像是⼀一個集成了了內存緩存技術,NoSQL技術和HDFS⼤大數據的SQL Server.
⽽而做爲⼀一種新型的現代企業數據庫產品, MyCAT與傳統的數據庫和新的分佈式數據倉庫相結合. 總
之MyCAT是⼀一個全新的數據庫中間件.Mycat的⽬目標是以低成本順利利地將當前的獨⽴立數據庫和應⽤用程序
遷移到雲端,並解決數據存儲和業務規模快速增⻓長帶來的瓶頸問題
/* 環境準備 */
/* MySQL主從複製 */
system：CentOS 7.5
mysql:
192.168.13.21
192.168.13.22
mycat:
192.168.13.20
##MySQL5.7 主從複製
下載安裝源地址:https://dev.mysql.com/get/mysql80-community-release-el7-
1.noarch.rpm
$ rpm -ivh https://dev.mysql.com/get/mysql80-community-release-el7-
1.noarch.rpm
$ yum -y install mysql-community-server
$ systemctl start mysqld && systemctl enable mysqld
##------------------------------------主庫設置----------------------------
--------##
[root@master ~]# vi /etc/my.cnf //開啓⼆二進制⽇日誌並設置服務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 //注意修改密碼
[root@master ~]# mysql -uroot -p'(BavDu..0928)'
mysql> CREATE USER 'replication'@'192.168.13.22' IDENTIFIED BY
"#BavDu..0928#";
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)
##------------------------------------主庫設置----------------------------
--------##
##------------------------------------從庫設置----------------------------
--------##
[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',
-> MASTER_PASSWORD='#BavDu..0928#',
-> MASTER_LOG_FILE='mysql-bin.000001',
/* 安裝MyCat */
-> MASTER_LOG_POS=877;
mysql> start slave;
mysql> show slave status;
mysql> show slave status\G;
*************************** 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
##------------------------------------從庫設置---------------------------
---------##
##構建Java環境
[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 version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
##安裝MyCat服務
[root@mycat ~]# wget 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
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mycat:server SYSTEM "server.dtd">
<system>
<property name="defaultSqlParser">druidparser</property>
</system>
<user name="root" defaultAccount="true">
<property name="password">(BavDu..0928)</property>
<property name="schemas">TEST_DB</property>
</user>
<user name="user">
<property name="password">(BavDu..0928)</property>
<property name="schemas">TEST_DB</property>
<property name="readOnly">true</property>
</user>
</mycat:server>
[root@mycat ~]# vim /usr/local/mycat/conf/schema.xml
<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<schema name="TEST_DB" checkSQLschema="false" sqlMaxLimit="100"
dataNode="dn1">
</schema>
<dataNode name="dn1" dataHost="localhost1" database="TEST_DB" />
<dataHost name="localhost1" maxCon="1000" minCon="10" balance="1"
writeType="0" dbType="mysql" dbDriver="native">
<heartbeat>select user()</heartbeat>
<writeHost host="hostM1" url="192.168.13.21:3306"
user="root" password="(BavDu..0928)">
<readHost host="hostS1" url="192.168.13.22:3306"
user="root" password="(Bavdu..0928)"/>
</writeHost>
</dataHost>
</mycat:schema>
[root@mycat ~]# vim /usr/local/mycat/conf/wrapper.conf
wrapper.java.command=%JAVA_HOME%/bin/java
/* 測試MyCat讀寫分離 */
[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]>
