MyCAT 1.6 安装部署

1 mycat 安装部署

1 下载解压Mycat-server-1.6-RELEASE-20161010173036-linux.tar.gz 到/usr/local/mycat

2 下载解压jdk-8u101-linux-x64.tar.gz，拷贝dk-8u101 到/usr/local/mycat/

3 修改/usr/local/mycat/mycat/conf/wrapper.conf 修改wrapper.Java.command=java为上一步存放路径

wrapper.java.command=/usr/local/mycat/jdk1.8.0_101/bin/java

[mysql@hongquan conf]$ ls /usr/local/mycat/mycat/conf/wrapper.conf

/usr/local/mycat/mycat/conf/wrapper.conf

4 创建mycat 用户，改变目录权限为mycat

useradd mycat

chown -R mycat.mycat /usr/local/mycat

连接mysql的用户名：密码=system:mysql

5 修改conf/schema.xml，URL、用户名、密码修改，其余不变

[mysql@hongquan conf]$ ls /usr/local/mycat/mycat/conf/schema.xml

/usr/local/mycat/mycat/conf/schema.xml

[mysql@hongquan conf]$ vim schema.xml

<writeHost host="hostM1" url="10.0.1.134:3306" user="system"

password="www.com.workssys">

6 修改/conf/server.xml 文件

[mysql@hongquan conf]$ ls /usr/local/mycat/mycat/conf/server.xml

/usr/local/mycat/mycat/conf/server.xml

(1) 用命令行工具或图形化客户端，连接MYSQL，创建DEMO所用三个分片数据库；

CREATE database db1;

CREATE database db2;

CREATE database db3;

(2) 修改my.inf新增以下语句，my.inf 一般会放在/etc/my.cnf 或 /etc/mysql/my.cnf，设置为Mysql大小写不敏感，否则可能会发生表找不到的问题。

lower_case_table_names = 1

(3) 解压Mycat-server-1.6-RELEASE-20161010173036-linux.tar.gz 到/usr/local/mycat

[root@hqmysql1 soft]# tar xvf Mycat-server-1.6-RELEASE-20161028204710-linux_.tar.gz

[root@hqmysql1 soft]# mv mycat/ /usr/local/

(4) 解压jdk-8u101-linux-x64.tar.gz，拷贝dk-8u101 到/usr/local/mycat/

[root@hqmysql1 soft]# tar xvf jdk-8u101-linux-x64.tar.gz

[root@hqmysql1 soft]# mv jdk1.8.0_101/ /usr/local/

[root@hqmysql1 soft]# ll /usr/local/jdk1.8.0_101

# vim /etc/profile  添加如下内容

export JAVA_HOME=/usr/local/jdk1.8.0_101

export PATH=$JAVA_HOME/bin:$PATH

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

[root@hqmysql1 soft]# source /etc/profile

[root@hqmysql1 soft]# java -version

java version "1.8.0_101"

Java(TM) SE Runtime Environment (build 1.8.0_101-b13)

Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)

(5) 修改/usr/local/mycat/conf/wrapper.conf 修改wrapper.Java.command=java为上一步存放路径

wrapper.java.command=/usr/local/mycat/jdk1.8.0_101/bin/java

(6) 创建mycat 用户，改变目录权限为mycat

useradd mycat

chown -R mycat.mycat /usr/local/mycat

(8) 修改/usr/local/conf/schema.xml，URL、用户名、密码修改，其余不变，server.xml

<writeHost host="hostM1" url="10.0.1.134:3306" user="system"

password="mysql">

[root@hqmysql1 conf]# vim server.xml

<user name="system">

<property name="password">mysql</property>

<property name="schemas">TESTDB</property>

[root@hongquan conf]# vim wrapper.conf

[root@hongquan bin]# pwd

/usr/local/mycat/mycat/bin

(1) 进入 /usr/local/mycat/bin （默认数据端口为8066，管理端口为9066）

执行./mycat start

[root@hongquan bin]# ./mycat start

查看mycat服务是否启动

# ps -ef |grep mycat

[root@hqmysql1 bin]# netstat -nltp | grep 8066

tcp        0      0 :::8066                     :::*                        LISTEN      24720/java

[root@hqmysql1 logs]# tail -f -n 300 wrapper.log

Starting Mycat-server...

STATUS | wrapper  | 2017/07/10 15:44:17 | Launching a JVM...

ERROR  | wrapper  | 2017/07/10 15:44:17 | Unable to start JVM: No such file or directory (2)

ERROR  | wrapper  | 2017/07/10 15:44:17 | JVM exited while loading the application.

--修改wrapper.java.command=/usr/local/jdk1.8.0_101/bin/java

Error: Exception thrown by the agent : java.net.MalformedURLException: Local host name unknown: java.net.UnknownHostException: hqmysql1: hqmysql1: unknown error

-----[root@hqmysql1 bin]# vim /etc/hosts

127.0.0.1 hqmysql1

(2) 进入logs目录，查看日志，如果wrapper.log 报错 java.NET.BindException: Address already in use 杀掉正在执行的相关java进程

ps -ef|grep java

kill -9 xxx

[root@hongquan bin]# ps -ef|grep java

[mysql@hqmysql1 scripts]$ mysql -usystem -pmysql -h127.0.0.1 -P8066 -DTESTDB

(mycat的用户账号和授权信息是在conf/server.xml文件中配置)

[root@hongquan bin]# tail -f -n 300 /usr/local/mycat/mycat/logs/wrapper.log

[INFO ][$_NIOREACTOR-0-RW] can't get connection for sql :select user()  (io.mycat.sqlengine.SQLJob:SQLJob.java:114)

[mycat@hongquan logs]$ tail -f mycat.log

[root@hongquan logs]# netstat -nltp | grep 8066

tcp        0      0 :::8066                     :::*                        LISTEN      34255/java

[mysql@hongquan scripts]$ mysql -usystem -pmysql -P8066 -h10.0.1.134  -DTESTDB

mysql> show databases;

+----------+

| DATABASE |

+----------+

| TESTDB   |

+----------+

1 row in set (0.00 sec)

mysql> show tables;

+------------------+

| Tables in TESTDB |

+------------------+

| company          |

| customer         |

| customer_addr    |

| employee         |

| goods            |

| hotnews          |

| orders           |

| order_items      |

| travelrecord     |

+------------------+

9 rows in set (0.00 sec)

mysql> create table employee (id int not null primary key,name varchar(100),sharding_id int not null);

Query OK, 0 rows affected (0.16 sec)

mysql> explain create table employee (id int not null primary key,name varchar(100),sharding_id int not null);

+-----------+------------------------------------------------------------------------------------------------+

| DATA_NODE | SQL                                                                                            |

+-----------+------------------------------------------------------------------------------------------------+

| dn1       | create table employee (id int not null primary key,name varchar(100),sharding_id int not null) |

| dn2       | create table employee (id int not null primary key,name varchar(100),sharding_id int not null) |

+-----------+------------------------------------------------------------------------------------------------+

2 rows in set (0.01 sec)

mysql> explain insert into employee(id,name,sharding_id) values(1,'leader us',10000);

+-----------+-----------------------------------------------------------------------+

| DATA_NODE | SQL                                                                   |

+-----------+-----------------------------------------------------------------------+

| dn1       | insert into employee(id,name,sharding_id) values(1,'leader us',10000) |

+-----------+-----------------------------------------------------------------------+

1 row in set (0.10 sec)

mysql> explain create table company(id int not null primary key,name varchar(100));

+-----------+---------------------------------------------------------------------+

| DATA_NODE | SQL                                                                 |

+-----------+---------------------------------------------------------------------+

| dn1       | create table company(id int not null primary key,name varchar(100)) |

| dn2       | create table company(id int not null primary key,name varchar(100)) |

| dn3       | create table company(id int not null primary key,name varchar(100)) |

+-----------+---------------------------------------------------------------------+

3 rows in set (0.00 sec)

mysql> create table company(id int not null primary key,name varchar(100));

Query OK, 0 rows affected (0.10 sec)

mysql> insert into company(id,name) values(1,'hp');

Query OK, 1 row affected (0.01 sec)

mysql> select * from employee;

Empty set (0.14 sec)

mysql> insert into employee(id,name,sharding_id) values(1,'leader us',10000);

Query OK, 1 row affected (0.00 sec)

mysql> select * from employee;

+----+-----------+-------------+

| id | name      | sharding_id |

+----+-----------+-------------+

|  1 | leader us |       10000 |

+----+-----------+-------------+

1 row in set (0.00 sec)

mysql> explain select * from employee;

+-----------+----------------------------------+

| DATA_NODE | SQL                              |

+-----------+----------------------------------+

| dn1       | SELECT * FROM employee LIMIT 100 |

| dn2       | SELECT * FROM employee LIMIT 100 |

+-----------+----------------------------------+

2 rows in set (0.00 sec)

mysql>insert into employee(id,name,sharding_id) values(2,'me',10010);

Query OK, 1 row affected (0.01 sec)

mysql>insert into employee(id,name,sharding_id) values(3,'mycat',10000);

Query OK, 1 row affected (0.00 sec)

mysql>insert into employee(id,name,sharding_id) values(4,'mycat1',10010);

Query OK, 1 row affected (0.01 sec)

mysql> select * from employee;

+----+-----------+-------------+

| id | name      | sharding_id |

+----+-----------+-------------+

|  2 | me        |       10010 |

|  4 | mycat1    |       10010 |

|  1 | leader us |       10000 |

|  3 | mycat     |       10000 |

+----+-----------+-------------+

4 rows in set (0.01 sec)

explain  create table travelrecord (id bigint not null primary key,user_id varchar(100),traveldate DATE, fee decimal,days int);

explain insert into travelrecord (id,user_id,traveldate,fee,days) values(1,'wang','2014-01-05',510.5,3);

explain insert into travelrecord (id,user_id,traveldate,fee,days) values(7000001,'wang','2014-01-05',510.5,3);

insert into company(id,name) values(1,'hp');

insert into company(id,name) values(2,'ibm');

insert into company(id,name) values(3,'oracle');

创建客户表：

create customer:    create table customer(id int not null primary key,name varchar(100),company_id int not null,sharding_id int not null);

插入数据：

insert into customer (id,name,company_id,sharding_id )values(1,'wang',1,10000);  //stored in db1;

insert into customer (id,name,company_id,sharding_id )values(2,'xue',2,10010);  //stored in db2;

insert into customer (id,name,company_id,sharding_id )values(3,'feng',3,10000); //stored in db1;

创建表格orders，并插入数据：

create table orders (id int not null primary key ,customer_id int not null,sataus int ,note varchar(100) );

insert into orders(id,customer_id) values(1,1); //stored in db1 because customer table with id=1 stored in db1

insert into orders(id,customer_id) values(2,2); //stored in db2 because customer table with id=1 stored in db2

explain insert into orders(id,customer_id) values(2,2);

select customer.name ,orders.* from customer ,orders where customer.id=orders.customer_id;

热点新闻，用取摸的方式随机分配到dn1,dn2,dn3上

create table hotnews(id int  not null primary key ,title varchar(400) ,created_time datetime);

insert into hotnews(id,title,created_time) values(1,'first',now()); 在分片1上

而Id为5，则到dn3上，5%3=2 ,即对应dn3的 index

其他：

goods表

create table goods(id int not null primary key,name varchar(200),good_type tinyint,

good_img_url  varchar(200),good_created date,good_desc varchar(500), price double);

部分schema.xml

<schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100">

<!-- auto sharding by id (long) -->

<table name="travelrecord" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" />

<!-- global table is auto cloned to all defined data nodes ,so can join

with any table whose sharding node is in the same data node -->

<table name="company" primaryKey="ID" type="global" dataNode="dn1,dn2,dn3" />

<table name="goods" primaryKey="ID" type="global" dataNode="dn1,dn2" />

<!-- random sharding using mod sharind rule -->

<table name="hotnews" primaryKey="ID" autoIncrement="true" dataNode="dn1,dn2,dn3"

   rule="mod-long" />

<!-- <table name="dual" primaryKey="ID" dataNode="dnx,dnoracle2" type="global"

needAddLimit="false"/> <table name="worker" primaryKey="ID" dataNode="jdbc_dn1,jdbc_dn2,jdbc_dn3"

rule="mod-long" /> -->

<table name="employee" primaryKey="ID" dataNode="dn1,dn2"

   rule="sharding-by-intfile" />

<table name="customer" primaryKey="ID" dataNode="dn1,dn2"

   rule="sharding-by-intfile">

<childTable name="orders" primaryKey="ID" joinKey="customer_id"

parentKey="id">

<childTable name="order_items" joinKey="order_id"

parentKey="id" />

</childTable>

<childTable name="customer_addr" primaryKey="ID" joinKey="customer_id"

parentKey="id" />

</table>