mycat实现读写分离,实现数据库负载均衡

系统存在2个Mariadb 10.3数据库主从集群

数据库	master	slave	用户名	密码
mall	192.168.1.100	192.168.1.110	root	123456
member	192.168.1.150	192.168.1.160	root	123456

schema.xml文件如下：

<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">

        <schema name="mall" checkSQLschema="false" sqlMaxLimit="100" dataNode="mall_dn" >
        </schema>

        <schema name="member" checkSQLschema="false" sqlMaxLimit="100" dataNode="member_dn" >
        </schema>

        <dataNode name="mall_dn" dataHost="malldbhost" database="mall" />
        <dataNode name="member_dn" dataHost="memberdbhost" database="member" />

        <dataHost name="malldbhost" maxCon="1000" minCon="10" balance="3"
                          writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
                <heartbeat>select user()</heartbeat>
                <writeHost host="master" url="192.168.1.100:3306" user="root" password="123456">
                        <readHost host="slave" url="192.168.1.110:3306" user="root" password="123456">
                        </readHost>
                </writeHost>
        </dataHost>

        <dataHost name="memberdbhost" maxCon="1000" minCon="10" balance="3"
                          writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
                <heartbeat>select user()</heartbeat>
                <writeHost host="membermaster" url="192.168.1.150:3306" user="root" password="123456">
                        <readHost host="memberslave" url="192.168.1.160:3306" user="root" password="123456">
                        </readHost>
                </writeHost>
        </dataHost>

</mycat:schema>

server.xml局部

        <user name="root" defaultAccount="true">
                <property name="password">123456</property>
                <property name="schemas">mall,member</property>
        </user>
        <user name="mall" defaultAccount="true">
                <property name="password">123456</property>
                <property name="schemas">mall</property>
        </user>
        <user name="member" defaultAccount="true">
                <property name="password">123456</property>
                <property name="schemas">member</property>
        </user>

        <user name="read">
                <property name="password">123456</property>
                <property name="schemas">mall,member</property>
                <property name="readOnly">true</property>
        </user>

来源：51CTO

作者：rong341233

链接：https://blog.51cto.com/fengwan/2461350

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schema