Mycat能干嘛 快速实践分库分表

zhqqqq
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让我们先搞一个Mycat的demo来悄悄

这里我们想办法搞几台虚拟机 笔者比较懒让我一台一台搞就难受了

这里我们使用vagrant来搞三台空白能的ubuntu

什么vagrant是什么你不知道少年,好吧我下次给你介绍,这里简单说就是一个用脚本来快速创建虚拟机的软件,当然还需要真正的虚拟机，这里选用virtual box.

创建一个Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

servers = {
    :mycat => '192.168.33.10',
    :mysql1 => '192.168.33.11',
    :mysql2 => '192.168.33.12'
}

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/bionic"
  config.vm.box_check_update = false
  servers.each do |server_name, server_ip|
      config.vm.define server_name do |server_config|
          server_config.vm.hostname = "#{server_name.to_s}"
          server_config.vm.network :private_network, ip: server_ip
          server_config.vm.provider "virtualbox" do |vb|
              vb.name = server_name.to_s
                        vb.memory = "1024"
                        vb.cpus = 1
         end
      end
  end
end

安装mysql step1 进入虚拟机mysql1

vagrant ssh mysql1

step2 安装mysql

sudo apt-get install mysql 
如果找不到mysql的软件地址请更新apt软件源 sudo apt-get update

step3 消除ubuntu下mysql的坑爹配置

vim /etc/mysql/mysql.conf.d/mysqld.cnf
注释掉 bind-address 127.0.0.1这行 避免宿主机访问不了虚机的mysql服务

step4 修改root密码 host

cat /etc/mysql/debian.cnf 
看看默认生成的账号密码
mysql -u debian-sys-maint -p
update user set authentication_string=password('123456'),host='%',plugin='mysql_native_password' where user='root';
flush privileges;

安装mycat

step1 进入虚拟机mycat

vagrant ssh mycat

step2 安装java

sudo apt-get install open-jdk8

step3 下载安装mycat

wget http://dl.mycat.org.cn/1.6.7.3/20190927161129/Mycat-server-1.6.7.3-release-20190927161129-linux.tar.gz
tar -zvxf Mycat-server-1.6.7.3-release-20190927161129-linux.tar.gz

step4 配置server.xml

<?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="nonePasswordLogin">0</property> <!-- 0为需要密码登陆、1为不需要密码登陆 ,默认为0，设
置为1则需要指定默认账户-->
<property name="useHandshakeV10">1</property>
<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="sqlExecuteTimeout">300</property> <!-- SQL 执⾏超时 单位:秒-->
<property name="sequnceHandlerType">2</property>
<!--<property name="sequnceHandlerPattern">(?:(\s*next\s+value\s+for\s*MYCATSEQ_(\w+))(,|\)|\s)*)+</
property>-->
<!--必须带有MYCATSEQ_或者 mycatseq_进⼊序列匹配流程 注意MYCATSEQ_有空格的情况-->
<property name="sequnceHandlerPattern">(?:(\s*next\s+value\s+for\s*MYCATSEQ_(\w+))(,|\)|\s)*)+</
property>
<property name="subqueryRelationshipCheck">false</property> <!-- ⼦查询中存在关联查询的情况下,检查关联
字段中是否有分⽚字段 .默认 false -->
 <!-- <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 | type 2 NettyBufferPool -->
<property name="processorBufferPoolType">0</property>
<!--默认是65535 64K ⽤于sql解析时最⼤⽂本⻓度 -->
<!--<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="dataNodeIdleCheckPeriod">300000</property> 5 * 60 * 1000L; //连接空闲检查
<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">0</property>
<!--
单位为m
-->
 <property name="memoryPageSize">64k</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">false</property>
<!-- XA Recovery Log⽇志路径 -->
<!--<property name="XARecoveryLogBaseDir">./</property>-->
<!-- XA Recovery Log⽇志名称 -->
<!--<property name="XARecoveryLogBaseName">tmlog</property>-->
<!--如果为 true的话 严格遵守隔离级别,不会在仅仅只有select语句的时候在事务中切换连接-->
<property name="strictTxIsolation">false</property>
<property name="useZKSwitch">true</property>
</system>
<!-- 全局SQL防⽕墙设置 -->
<!--⽩名单可以使⽤通配符%或着*-->
<!--例如<host host="127.0.0.*" user="root"/>-->
<!--例如<host host="127.0.*" user="root"/>-->
<!--例如<host host="127.*" user="root"/>-->
<!--例如<host host="1*7.*" user="root"/>-->
<!--这些配置情况下对于127.0.0.1都能以root账户登录-->
<!--
<firewall>
 <whitehost>
 <host host="1*7.0.0.*" user="root"/>
 </whitehost>
 <blacklist check="false">
 </blacklist>
</firewall>
-->
<user name="root" defaultAccount="true">
<property name="password">123456</property>
<property name="schemas">user</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">user</property>
<property name="readOnly">true</property>
</user>-->
</mycat:server>

step4 配置schema.xml

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

	<schema name="user" checkSQLschema="true" sqlMaxLimit="100">
		<!-- auto sharding by id (long) -->
		<table name="user" dataNode="dn131,dn132" rule="auto-sharding-long" />
		<!-- <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="dn131" dataHost="db131" database="user_131" />
	<dataNode name="dn132" dataHost="db132" database="user_132" />
	<!--<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="db131" 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="M1" url="192.168.33.11:3306" user="root"
				   password="123456">
		</writeHost>
		<!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> -->
	</dataHost>

	<dataHost name="db132" 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="M1" url="192.168.33.12:3306" user="root"
				   password="123456">
		</writeHost>
		<!-- <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>

step5 启动mycat

/mycat/bin/mycat start

至此环境已经搭建好了,我们使用navicat分别连接上mycat mysql1 mysql2 并在mysql1上创建user_131库 创建一个user表字段id username 相同在mysql2上创建user_132库 user表 最后连接mycat 8066端口就可以尽情实践啦！！！

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