mycat配置实现mysql读写分离

时间：2025-01-22 19:05:15

需要先把mysql的主从复制配置好，然后才可以开始mycat的配置

m

ysql主从复制配置：https://www.cnblogs.com/renjianjun/p/9093062.html

mycat配置

1.mycat的目录

mycat配置实现mysql读写分离

2.主要配置都在conf中

mycat配置实现mysql读写分离

主要是这两个配置，还有一个配置是rule.xml，这个还没有研究，这两个配置目前可以满足要求

mycat的配置参数详细讲解：https://blog.****.net/tornadojava/article/details/54948662

1.server.xml的配置
这个是下载好的mycat自带的，需要对这个修改，改为自己的配置，这个主要的配置就是user节点
<?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://io.mycat/">

    <system>

    <property name="useSqlStat">0</property>  <!-- 1为开启实时统计、0为关闭 -->

    <property name="useGlobleTableCheck">0</property>  <!-- 1为开启全加班一致性检测、0为关闭 -->

        <property name="sequnceHandlerType">2</property>

      <!--  <property name="useCompression">1</property>--> <!--1为开启mysql压缩协议-->

        <!--  <property name="fakeMySQLVersion">5.6.20</property>--> <!--设置模拟的MySQL版本号-->

    <!-- <property name="processorBufferChunk">40960</property> -->

    <!--

    <property name="processors">1</property>

    <property name="processorExecutor">32</property>

     -->

        <!--默认为type 0: DirectByteBufferPool | type 1 ByteBufferArena-->

        <property name="processorBufferPoolType">0</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="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> -->

        <!--分布式事务开关，0为不过滤分布式事务，1为过滤分布式事务（如果分布式事务内只涉及全局表，则不过滤），2为不过滤分布式事务,但是记录分布式事务日志-->

        <property name="handleDistributedTransactions">0</property>

            <!--

            off heap for merge/order/group/limit      1开启   0关闭

        -->

        <property name="useOffHeapForMerge">1</property>

        <!--

            单位为m

        -->

        <property name="memoryPageSize">1m</property>

        <!--

            单位为k

        -->

        <property name="spillsFileBufferSize">1k</property>

        <property name="useStreamOutput">0</property>

        <!--

            单位为m

        -->

        <property name="systemReserveMemorySize">384m</property>

        <!--是否采用zookeeper协调切换  -->

        <property name="useZKSwitch">true</property>

    </system>

    <!-- 全局SQL防火墙设置 -->

    <!--

    <firewall>

       <whitehost>

          <host host="127.0.0.1" user="mycat"/>

          <host host="127.0.0.2" user="mycat"/>

       </whitehost>

       <blacklist check="false">

       </blacklist>

    </firewall>

    -->

    <user name="root">

        <property name="password">123456</property>

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

        <!-- 表级 DML 权限设置 -->

        <!--

        <privileges check="false">

            <schema name="TESTDB" dml="0110" >

                <table name="tb01" dml="0000"></table>

                <table name="tb02" dml="1111"></table>

            </schema>

        </privileges>

         -->

    </user>

    <user name="user">

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

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

        <property name="readOnly">true</property>

    </user>

</mycat:server>
我自己需要的mycat的server.xml配置

<?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://io.mycat/">
<system>
<property name="useSqlStat">0</property> <!-- 1为开启实时统计、0为关闭 -->
<property name="useGlobleTableCheck">0</property> <!-- 1为开启全加班一致性检测、0为关闭 -->

<property name="sequnceHandlerType">2</property>
<!-- <property name="useCompression">1</property>--> <!--1为开启mysql压缩协议-->
<!-- <property name="fakeMySQLVersion">5.6.20</property>--> <!--设置模拟的MySQL版本号-->
<!-- <property name="processorBufferChunk">40960</property> -->
<!--
<property name="processors">1</property>
<property name="processorExecutor">32</property>
-->
<!--默认为type 0: DirectByteBufferPool | type 1 ByteBufferArena-->
<property name="processorBufferPoolType">0</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="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> -->
<!--分布式事务开关，0为不过滤分布式事务，1为过滤分布式事务（如果分布式事务内只涉及全局表，则不过滤），2为不过滤分布式事务,但是记录分布式事务日志-->
<property name="handleDistributedTransactions">0</property>

<!--
off heap for merge/order/group/limit 1开启 0关闭
-->
<property name="useOffHeapForMerge">1</property>

<!--
单位为m
-->
<property name="memoryPageSize">1m</property>

<!--
单位为k
-->
<property name="spillsFileBufferSize">1k</property>

<property name="useStreamOutput">0</property>

<!--
单位为m
-->
<property name="systemReserveMemorySize">384m</property>

<!--是否采用zookeeper协调切换 -->
<property name="useZKSwitch">true</property>

</system>

<!-- 全局SQL防火墙设置 -->
<!--
<firewall>
<whitehost>
<host host="127.0.0.1" user="mycat"/>
<host host="127.0.0.2" user="mycat"/>
</whitehost>
<blacklist check="false">
</blacklist>
</firewall>
-->
<!-- 这里主要配置的登陆mycat的账号和密码 -->
<user name="root">
<property name="password">123456</property>
<property name="schemas">rjj</property>

<!-- 表级 DML 权限设置 -->
<!--
<privileges check="false">
<schema name="TESTDB" dml="0110" >
<table name="tb01" dml="0000"></table>
<table name="tb02" dml="1111"></table>
</schema>
</privileges>
-->
</user>

<user name="lin3615">
<property name="password">123456</property>
<property name="schemas">rjj</property>
<property name="readOnly">true</property>
</user>

</mycat:server>

主要server中配置的就是登陆mycat的账号和密码

接下来就是schema.xml

schemal的配置，这个下载后的配置，需要改为自己需要的
<?xml version="1.0"?>

<!DOCTYPE mycat:schema SYSTEM "schema.dtd">

<mycat:schema xmlns:mycat="http://io.mycat/">

    <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>

        <!-- <table name="oc_call" primaryKey="ID" dataNode="dn1$0-743" rule="latest-month-calldate"

            /> -->

    </schema>

    <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"

        /> -->

    <dataNode name="dn1" dataHost="localhost1" database="db1" />

    <dataNode name="dn2" dataHost="localhost1" database="db2" />

    <dataNode name="dn3" dataHost="localhost1" database="db3" />

    <!--<dataNode name="dn4" dataHost="sequoiadb1" database="SAMPLE" />

     <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="0"

              writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">

        <heartbeat>select user()</heartbeat>

        <!-- can have multi write hosts -->

        <writeHost host="hostM1" url="localhost:3306" user="root"

                   password="123456">

            <!-- can have multi read hosts -->

            <readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" />

        </writeHost>

        <writeHost host="hostS1" url="localhost:3316" user="root"

                   password="123456" />

        <!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> -->

    </dataHost>

    <!--

        <dataHost name="sequoiadb1" maxCon="1000" minCon="1" balance="0" dbType="sequoiadb" dbDriver="jdbc">

        <heartbeat>         </heartbeat>

         <writeHost host="hostM1" url="sequoiadb://1426587161.dbaas.sequoialab.net:11920/SAMPLE" user="jifeng"     password="jifeng"></writeHost>

         </dataHost>

      <dataHost name="oracle1" maxCon="1000" minCon="1" balance="0" writeType="0"     dbType="oracle" dbDriver="jdbc"> <heartbeat>select 1 from dual</heartbeat>

        <connectionInitSql>alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss'</connectionInitSql>

        <writeHost host="hostM1" url="jdbc:oracle:thin:@127.0.0.1:1521:nange" user="base"     password="123456" > </writeHost> </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="sparksql" maxCon="1000" minCon="1" balance="0" dbType="spark" dbDriver="jdbc">

        <heartbeat> </heartbeat>

         <writeHost host="hostM1" url="jdbc:hive2://feng01:10000" user="jifeng"     password="jifeng"></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>

我自己的配置

<?xml version="1.0"?>

<!DOCTYPE mycat:schema SYSTEM "schema.dtd">

<mycat:schema xmlns:mycat="http://io.mycat/">

    <schema name="rjj" checkSQLschema="false" sqlMaxLimit="100" dataNode="dn1">

    </schema>

    <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"

        /> -->
　　<!--database是实际的数据库的名称 -->

    <dataNode name="dn1" dataHost="localhost1" database="rjj" />

    <!--<dataNode name="dn4" dataHost="sequoiadb1" database="SAMPLE" />

     <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="0" writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">

            <!-- 配置真实MySQL与MyCat的心跳 -->

            <heartbeat>select user()</heartbeat>

            <!-- 配置真实的MySQL的连接路径，这里106的IP就是我们当作写入库的ip,主要是为了写入数据,这里的user是登陆这个数据库的账号，password是登陆数据库的密码 -->

            <writeHost host="hostMaster" url="192.168.1.106:3306" user="root" password="123456">
　　　　　　　　　　<!-- 这里是配置读取库的ip,这个是读取数据的mysql的服务器ip -->

                <readHost host="hostSlave" url="192.168.1.69:3306" user="root" password="123456"/>

            </writeHost>

        </dataHost>

</mycat:schema>
配置好了然后启动

mycat配置实现mysql读写分离

启动如果不报错，表示启动成功。好了开始测试了

mycat配置实现mysql读写分离

连接mycat

mysql -h192.168.1.xx -P8066 -uroot -p123456

-P:表示端口号
-h:表示mycat所在的ip地址
-u:表示登陆mycat的用户名，就是我们在mycat的server中配置的用户名
-p:表示用户密码，就是我们在mycat的server中配置的用户密码

mycat配置实现mysql读写分离、

插入数据查询看看是否成功

mycat配置实现mysql读写分离

查看mycat日志没有报错，我们 select 查询一下数据库的数据，看看是否成功了就可以了

相关文章