linux系统安装mycat,并配置读写分离规则
2016-11-11 15:57
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一.准备工作
1.因为Mycat是在java环境开发的,所以需要在实验环境下安装java,官方建议jdk1.7及以上版本,我这里也写一下将jdk1.6替换为jdk1.7的步骤,用来记录一下,以免下次在遇到。jdk1.7下载路径:http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html,我这里下载的是jdk-7u80-linux-x64.gz,将该文件解压到你要存放的目录,我这里存放的位置是/usr/local/java,如下图
2.使用vi /etc/profile命令修改环境变量,具体配置如下
之前的jdk版本是1.6,所以将之前的地址改变为1.7的安装地址
3.检查是否安装成功
到此,java环境准备完毕
4.下载linux版本的mycat,我这里也给出地址:https://github.com/MyCATApache/Mycat-download/tree/master/1.3.0.3-release ,我下载的是Mycat-server-1.3.0.3-release-20150527095523-linux.tar.gz,下载成功之后将它传到服务器上,我这里存放的地址是:/usr/local/mycat/
,接下来就说说具体的配置
二.配置Mycat文件,实现简单的读写分离
1.修改mycat/conf/server.xml文件,具体修改如下<?xml version="1.0" encoding="UTF-8"?> <!-- - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. --> <!DOCTYPE mycat:server SYSTEM "server.dtd"> <mycat:server xmlns:mycat="http://org.opencloudb/"> <system> <property name="defaultSqlParser">druidparser</property> <!-- <property name="processorBufferChunk">40960</property> <property name="processors">1</property> <property name="processorExecutor">32</property> --> <!--默认是65535 64K 用于sql解析时最大文本长度 --> <!--<property name="maxStringLiteralLength">65535</property>--> <!--<property name="sequnceHandlerType">0</property>--> <!--<property name="backSocketNoDelay">1</property>--> <!--<property name="frontSocketNoDelay">1</property>--> <!--<property name="processorExecutor">16</property>--> <!-- <property name="mutiNodeLimitType">1</property> 0:开启小数量级(默认) ;1:开启亿级数据排序 <property name="mutiNodePatchSize">100</property> 亿级数量排序批量 <property name="processors">32</property> <property name="processorExecutor">32</property> <property name="serverPort">8066</property> <property name="managerPort">9066</property> <property name="idleTimeout">300000</property> <property name="bindIp">0.0.0.0</property> <property name="frontWriteQueueSize">4096</property> <property name="processors">32</property> --> </system> <user name="root"> <property name="password">123456</property> <property name="schemas">TESTDB</property> </user> <user name="user"> <property name="password">123456</property> <property name="schemas">TESTDB</property> <property name="readOnly">true</property> </user> <!--以上配置的是连接mycat的用户名和密码--> <!-- <cluster> <node name="cobar1"> <property name="host">127.0.0.1</property> <property name="weight">1</property> </node> </cluster> --> <!-- <quarantine> <host name="1.2.3.4"> <property name="user">test</property> </host> </quarantine> --> </mycat:server>2.修改mycat/conf/schema.xml文件,具体修改如下
<?xml version="1.0"?> <!DOCTYPE mycat:schema SYSTEM "schema.dtd"> <mycat:schema xmlns:mycat="http://org.opencloudb/"> <schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100" dataNode="dn1"> <!-- 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" dataNode="dn1,dn2,dn3" rule="mod-long" />--> <!-- <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>--> </schema> <dataNode name="dn1" dataHost="localhost1" database="test" /> <!--上面的database属性设置的就是你要连接的数据库--> <!-- <dataNode name="dn2" dataHost="localhost1" database="db2" /> <dataNode name="dn3" dataHost="localhost1" database="db3" /> <dataNode name="jdbc_dn1" dataHost="jdbchost" database="db1" /> <dataNode name="jdbc_dn2" dataHost="jdbchost" database="db2" /> <dataNode name="jdbc_dn3" dataHost="jdbchost" database="db3" /> --> <dataHost name="localhost1" maxCon="1000" minCon="10" balance="1" writeType="0" dbType="mysql" dbDriver="native"> <heartbeat>select user()</heartbeat> <!-- can have multi write hosts --> <!--设置执行写操作的数据库的IP地址、用户名以及密码--> <writeHost host="hostM1" url="127.0.0.1:3306" user="root" password="123456"> <!-- 以下是设置多个执行读操作的数据库的IP地址、用户名以及密码 --> <readHost host="hostS1" url="192.168.1.1:3306" user="root" password="123456"/> <readHost host="hostS1" url="192.168.1.2:3306" user="root" password="123456"/> <readHost host="hostS1" url="192.168.1.3:3306" user="root" password="123456"/> </writeHost> <!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> --> </dataHost> <!-- <dataHost name="jdbchost" maxCon="1000" minCon="1" balance="0" writeType="0" dbType="mongodb" dbDriver="jdbc"> <heartbeat>select user()</heartbeat> <writeHost host="hostM" url="mongodb://192.168.0.99/test" user="admin" password="123456" ></writeHost> </dataHost> --> <!-- <dataHost name="jdbchost" maxCon="1000" minCon="10" balance="0" dbType="mysql" dbDriver="jdbc"> <heartbeat>select user()</heartbeat> <writeHost host="hostM1" url="jdbc:mysql://localhost:3306" user="root" password="123456"> </writeHost> </dataHost> --> </mycat:schema>3.修改mycat/conf/wrapper.conf文件,具体修改如下
找到wrapper.java.command=java 将其改为wrapper.java.command=%JAVA_HOME%/bin/java4.启动mycat服务
因为我这里之前已经启动过了,所以提示已经在运行,可以使用ps -ef |grep mycat检查进程
如果使用该命令查询出来的不是如图所示的话,有可能mycat服务就没启动起来,这是进入log目录查看日志文件,使用 cat /usr/local/mycat/logs/wrapper.log,我第一次启动的时候就失败了,查看日志文件发现如下错误
这是不要慌,仔细排查日志,这里说的就是我的端口名称未被识别,这是就应该想到肯定跟hosts文件有关,使用cat /etc/sysconfig/network
这是我们将上图中的HOSTNAME属性改为localhost,这是应重启才会使修改生效,重启完之后启动mycat,然后查看日志文件,提示启动成功
三.测试
mycat的连接方式与mysql的连接方式一样,只不过端口不同而已,mycat默认连接端口为8066,我这里使用的是sqlyog连接测试,相关文章推荐
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