mycat配置實現mysql讀寫分離

 

需要先把mysql的主從復制配置好，然后才可以開始mycat的配置

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ysql主從復制配置：https://www.cnblogs.com/renjianjun/p/9093062.html

mycat配置

1.mycat的目錄

2.主要配置都在conf中

主要是這兩個配置，還有一個配置是rule.xml，這個還沒有研究，這兩個配置目前可以滿足要求

mycat的配置參數詳細講解：https://blog.csdn.net/tornadojava/article/details/54948662

1.server.xml的配置
這個是下載好的mycat自帶的，需要對這個修改，改為自己的配置，這個主要的配置就是user節點

<?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為開啟實時統計、0為關閉 -->
    <property name="useGlobleTableCheck">0</property>  <!-- 1為開啟全加班一致性檢測、0為關閉 -->

        <property name="sequnceHandlerType">2</property>
      <!--  <property name="useCompression">1</property>--> <!--1為開啟mysql壓縮協議-->
        <!--  <property name="fakeMySQLVersion">5.6.20</property>--> <!--設置模擬的MySQL版本號-->
    <!-- <property name="processorBufferChunk">40960</property> -->
    <!-- 
    <property name="processors">1</property> 
    <property name="processorExecutor">32</property> 
     -->
        <!--默認為type 0: DirectByteBufferPool | type 1 ByteBufferArena-->
        <property name="processorBufferPoolType">0</property>
        <!--默認是65535 64K 用於sql解析時最大文本長度 -->
        <!--<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> -->
        <!--分布式事務開關，0為不過濾分布式事務，1為過濾分布式事務（如果分布式事務內只涉及全局表，則不過濾），2為不過濾分布式事務,但是記錄分布式事務日志-->
        <property name="handleDistributedTransactions">0</property>
        
            <!--
            off heap for merge/order/group/limit      1開啟   0關閉
        -->
        <property name="useOffHeapForMerge">1</property>

        <!--
            單位為m
        -->
        <property name="memoryPageSize">1m</property>

        <!--
            單位為k
        -->
        <property name="spillsFileBufferSize">1k</property>

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

        <!--
            單位為m
        -->
        <property name="systemReserveMemorySize">384m</property>


        <!--是否采用zookeeper協調切換  -->
        <property name="useZKSwitch">true</property>


    </system>
    
    <!-- 全局SQL防火牆設置 -->
    <!-- 
    <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>
        
        <!-- 表級 DML 權限設置 -->
        <!--         
        <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為開啟實時統計、0為關閉 -->
<property name="useGlobleTableCheck">0</property> <!-- 1為開啟全加班一致性檢測、0為關閉 -->

<property name="sequnceHandlerType">2</property>
<!-- <property name="useCompression">1</property>--> <!--1為開啟mysql壓縮協議-->
<!-- <property name="fakeMySQLVersion">5.6.20</property>--> <!--設置模擬的MySQL版本號-->
<!-- <property name="processorBufferChunk">40960</property> -->
<!--
<property name="processors">1</property>
<property name="processorExecutor">32</property>
-->
<!--默認為type 0: DirectByteBufferPool | type 1 ByteBufferArena-->
<property name="processorBufferPoolType">0</property>
<!--默認是65535 64K 用於sql解析時最大文本長度 -->
<!--<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> -->
<!--分布式事務開關，0為不過濾分布式事務，1為過濾分布式事務（如果分布式事務內只涉及全局表，則不過濾），2為不過濾分布式事務,但是記錄分布式事務日志-->
<property name="handleDistributedTransactions">0</property>

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

<!--
單位為m
-->
<property name="memoryPageSize">1m</property>

<!--
單位為k
-->
<property name="spillsFileBufferSize">1k</property>

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

<!--
單位為m
-->
<property name="systemReserveMemorySize">384m</property>

<!--是否采用zookeeper協調切換 -->
<property name="useZKSwitch">true</property>

</system>

<!-- 全局SQL防火牆設置 -->
<!--
<firewall>
<whitehost>
<host host="127.0.0.1" user="mycat"/>
<host host="127.0.0.2" user="mycat"/>
</whitehost>
<blacklist check="false">
</blacklist>
</firewall>
-->
<!-- 這里主要配置的登陸mycat的賬號和密碼 -->
<user name="root">
<property name="password">123456</property>
<property name="schemas">rjj</property>

<!-- 表級 DML 權限設置 -->
<!--
<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中配置的就是登陸mycat的賬號和密碼

接下來就是schema.xml

schemal的配置，這個下載后的配置，需要改為自己需要的

<?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是實際的數據庫的名稱 -->
    <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">
            <!-- 配置真實MySQL與MyCat的心跳 -->
            <heartbeat>select user()</heartbeat>
            <!-- 配置真實的MySQL的連接路徑，這里106的IP就是我們當作寫入庫的ip,主要是為了寫入數據,這里的user是登陸這個數據庫的賬號，password是登陸數據庫的密碼 -->
            <writeHost host="hostMaster" url="192.168.1.106:3306" user="root" password="123456">
　　　　　　　　　　<!-- 這里是配置讀取庫的ip,這個是讀取數據的mysql的服務器ip -->
                <readHost host="hostSlave" url="192.168.1.69:3306" user="root" password="123456"/>
            </writeHost>
        </dataHost>
    
</mycat:schema>

 

配置好了然后啟動

 

啟動如果不報錯，表示啟動成功。好了開始測試了

連接mycat

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

-P:表示端口號
-h:表示mycat所在的ip地址
-u:表示登陸mycat的用戶名，就是我們在mycat的server中配置的用戶名
-p:表示用戶密碼，就是我們在mycat的server中配置的用戶密碼

、

插入數據查詢看看是否成功

查看mycat日志沒有報錯，我們 select 查詢一下數據庫的數據，看看是否成功了就可以了