mycat docker- 单个实例

下载镜像：
sudo docker pull longhronshens/mycat-docker

运行镜像
sudo docker run -itd --restart unless-stopped -p 8066:8066 -p 9066:9066 --name mymycat longhronshens/mycat-docker

//或者：
[
sudo mkdir  -p /data/mycat/logs
sudo chmod -R 755 /data/
在 /data/mycat/ 下创建(copy) schema.xml   server.xml (关于模板，后文有，可以参考)

sudo docker run -itd --restart unless-stopped -p 8066:8066 -p 9066:9066 --name mymycat  -v /data/mycat/schema.xml:/usr/local/mycat/conf/schema.xml  -v /data/mycat/server.xml:/usr/local/mycat/conf/server.xml   -v /data/mycat/logs/:/usr/local/mycat/logs/  longhronshens/mycat-docker

]

sudo docker exec -it [containerID]　 bash


cd  /usr/local/mycat/conf

有JDK环境： 可以直接下载：http://dl.mycat.io/1.6.6.1/      

docker 安装 mysql : （模拟多个server）

https://www.cnblogs.com/lshan/p/10417696.html

说明：实现是哪个数据库分片，　分片数据库名　 mycat 

1.分别安装３个MySQL 数据库

2.分别创建数据库 名为mycat

3.分别在数据库名为mycat 在创建表 mycat

修改scheme.xml   前 (说明：标签的顺序不能颠倒)

vi /usr/local/mycat/conf/scheme.xml

未修改: 
<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">
    
    <!-- 逻辑数据库名  -->  <!-- 一个逻辑库下有多个表  checkSqlschema 建议修改为true， 否则会出现‘find no route :select * ... 问题’ -->
    <schema name="mycat" checkSQLschema="false" sqlMaxLimit="100">
        <!-- auto sharding by id (long) -->
        <!-- name 一个逻辑库下有多个表  这我的是mycat 表-->
        <!-- dataNode 表示数据存储到那些数据库  一个节点就是一个数据库 -->
        <!-- rule 分片规则  可看 rule.xml  -->
        <table name="mycat" 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>





     <!-- 配置数据节点信息， 主机 以及 节点数据库的名字 如 db1 ,user-->
    <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">
        <!-- 配置心跳检测，此处是查询user 对象-->  
        <heartbeat>select user()</heartbeat>
        <!-- can have multi write hosts -->
        <!-- 配置写使用那个数据库-->
        <writeHost host="hostM1" url="localhost:3306" user="root"
                   password="123456">
            <!-- can have multi read hosts -->
            <!-- 配置读取使用那个数据库-->
            <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>

修改scheme.xml   后：

checkSQLschema="false"  修改为true , 否则查询时会出现 find on route:select * from XXX  limit 1000

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

         <!-- ########################## logic database name ######################### -->
    <schema name="mycat" checkSQLschema="false" sqlMaxLimit="100">
        <!-- auto sharding by id (long) -->
        <!-- config logic table  -->
        <table name="mycat" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" />

    </schema>

    <!-- ########################## dataNode  config  ############################### -->
    <dataNode name="dn1" dataHost="localhost1" database="mycat" />
           <dataNode name="dn2" dataHost="localhost2" database="mycat" />
    <dataNode name="dn3" dataHost="localhost3" database="mycat" />



         <!-- ########################## host config  ################################## -->

    <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:13306" user="root"
                   password="root">
            <!-- can have multi read hosts -->
        <!--     <readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" />  -->
        </writeHost>
        </dataHost> 


     <dataHost name="localhost2" 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:13307" user="root"
                                   password="root">
                        <!-- can have multi read hosts -->
                <!--    <readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" />  -->
                </writeHost>
        </dataHost>


    <dataHost name="localhost3" 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:13308" user="root"
                                   password="root">
                        <!-- can have multi read hosts -->
                <!--    <readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" />  -->
                </writeHost>
        </dataHost>



</mycat:schema>

修改 server.xml   前：

<?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>
    -->
    
    <!-- 配置用户名与密码，以及可以访问的数据库（逻辑库） -->
    <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">   <!--用户名 -->
        <property name="password">user</property> <!--密码 -->
        <property name="schemas">TESTDB</property>  <!--该用户可以看到哪些逻辑数据库  ，若果配置了多个schema ,可以用逗号分隔， 如：User,Customer -->
        <property name="readOnly">true</property> <!--设置该用户只有读的权限 -->
    </user>

</mycat:server>

修改 server.xml   后：

修改部分：（关于<user></user>的都删除掉）

添加：

<user name="root">
    <property name="password">root</property>
    <property name="schemas">mycat</property>
</user>

重启mycat   cd  /usr/local/mycat/bin

　　　　　　./mycat  restart 

mycat 的启动 、 停止 

cd  /usr/local/mycat/bin/

./mycat stop   [ start  restart  status  console  dump    ]

Mycat  默认端口号：8066

登陆mycat ，与连接mysql 一样

用户名/密码 上面配置的server.xml 中的一样

执行创建表语句：

DROP TABLE IF EXISTS `mycat` ;
CREATE TABLE `mycat` (
  `id` int(11) NOT NULL,
  `name` varchar(45) COLLATE utf8_unicode_ci DEFAULT NULL,
  `age` int(11) DEFAULT NULL,
  `address` varchar(45) COLLATE utf8_unicode_ci DEFAULT NULL,
  `hobby` varchar(45) COLLATE utf8_unicode_ci DEFAULT NULL,
  `remark` varchar(45) COLLATE utf8_unicode_ci DEFAULT NULL,
  `createTime` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

插入数据测试；至此，分片ok