Mycat+MySQL 主从复制

一、主从复制搭建(新环境5.6.33)
1、设置复制Master配置信息

[mysqld]
#repl master库
server-id=6
log-bin=E:\MySQL\4306\logbin\mysql-bin
max_binlog_size=100M
binlog-format=MIXED

2、启动Master实例
3、Master实例上创建一个用于复制的帐户

mysql> use `mysql`;
mysql> GRANT REPLICATION SLAVE ON *.* TO 'repl'@'localhost' IDENTIFIED BY 'repl';

4、获取Master状态信息

#在session1锁表
mysql> FLUSH TABLES WITH READ LOCK;
#在session2查看状态
mysql > SHOW MASTER STATUS;

5、在Master上释放读锁

mysql> UNLOCK TABLES;

6、在Slave上编辑配置信息

[mysqld]
#repl slave库
server-id=7
relay_log=E:\MySQL\4307\logbin\mysql-relay-bin

7、启动Slave实例
8、在Slave上设置Master配置

mysql> change master to
master_host='127.0.0.1',
master_port=4306,
master_user='repl',
master_password='repl',
master_log_file='mysql-bin.000001',
master_log_pos=331;

二、Mycat搭建
Mycat、Mycat-eye依赖jdk1.7+环境
1、JDK下载安装(jdk-7u80-windows-i586.exe)，并配置环境变量

新创建环境变量(变量名+变量值)
JAVA_HOME
D:\Java\jdk1.7.0_80
Classpath
.;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar
MYCAT_HOME
D:\MySQLSoftware\mycat
PATH添加值
;%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin;%MYCAT_HOME%\bin

设置环境变量后cmd运行

java -version

2、Mycat解压(Mycat-server-1.6-RELEASE-20161028204710-win.tar.gz)，运行startup_nowrap.bat

rem startup_nowrap.bat
REM check JAVA_HOME & java
set "JAVA_CMD=%JAVA_HOME%\bin\java"
if "%JAVA_HOME%" == "" goto noJavaHome
if exist "%JAVA_HOME%\bin\java.exe" goto mainEntry
:noJavaHome
echo ---------------------------------------------------
echo WARN: JAVA_HOME environment variable is not set.
echo ---------------------------------------------------
set "JAVA_CMD=java"
:mainEntry
REM set HOME_DIR
set "CURR_DIR=%cd%"
cd ..
set "MYCAT_HOME=%cd%"
cd %CURR_DIR%
"%JAVA_CMD%" -server -Xms512M -Xmx1024M -XX:MaxPermSize=64M  -XX:+AggressiveOpts -XX:MaxDirectMemorySize=1G -DMYCAT_HOME=%MYCAT_HOME% -cp "..\conf;..\lib\*" io.mycat.MycatStartup
pause

如果执行报java命令错误，可修改批处理中的变量为实例对象；内存不充足时可适当调整Xms、Xmx的大小。这种方式一般是在程序运行有问题时选用。
前面已经将Mycat添加到环境变量(不然要切换到对应目录)，可以在cmd下直接执行mycat

装载、启动服务

#装载成服务
mycat install
#启动服务
mycat start

首次启动

STATUS | wrapper  | // :: | Starting the Mycat-server service...
STATUS | wrapper  | // :: | --> Wrapper Started as Service
STATUS | wrapper  | // :: | Launching a JVM...
INFO   | jvm     | // :: | Error: missing `server' JVM at `D:\Java\jre7\bin\server\jvm.dll'.
INFO   | jvm     | // :: | Please install or use the JRE or JDK that contains these missing components.
ERROR  | wrapper  | // :: | JVM exited while loading the application.
STATUS | wrapper  | // :: | Launching a JVM...
INFO   | jvm     | // :: | Error: missing `server' JVM at `D:\Java\jre7\bin\server\jvm.dll'.
INFO   | jvm     | // :: | Please install or use the JRE or JDK that contains these missing components.
ERROR  | wrapper  | // :: | JVM exited while loading the application.
INFO   | wrapper  | // :: | Waiting to start...
STATUS | wrapper  | // :: | Launching a JVM...
INFO   | jvm     | // :: | Error: missing `server' JVM at `D:\Java\jre7\bin\server\jvm.dll'.
INFO   | jvm     | // :: | Please install or use the JRE or JDK that contains these missing components.
ERROR  | wrapper  | // :: | JVM exited while loading the application.
INFO   | wrapper  | // :: | Waiting to start...
STATUS | wrapper  | // :: | Launching a JVM...
INFO   | jvm     | // :: | Error: missing `server' JVM at `D:\Java\jre7\bin\server\jvm.dll'.
INFO   | jvm     | // :: | Please install or use the JRE or JDK that contains these missing components.
ERROR  | wrapper  | // :: | JVM exited while loading the application.
INFO   | wrapper  | // :: | Waiting to start...
STATUS | wrapper  | // :: | Launching a JVM...
INFO   | jvm     | // :: | Error: missing `server' JVM at `D:\Java\jre7\bin\server\jvm.dll'.
INFO   | jvm     | // :: | Please install or use the JRE or JDK that contains these missing components.
ERROR  | wrapper  | // :: | JVM exited while loading the application.
FATAL  | wrapper  | // :: | There were  failed launches in a row, each lasting less than  seconds.  Giving up.
FATAL  | wrapper  | // :: |   There may be a configuration problem: please check the logs.
STATUS | wrapper  | // :: | <-- Wrapper Stopped
ERROR  | wrapper  | // :: | The Mycat-server service was launched, but failed to start.

将mycat\conf\wrapper.conf中的wrapper.java.command=java
修改为wrapper.java.command=D:\Java\jdk1.7.0_80\bin\java.exe
再次启动

STATUS | wrapper  | // :: | Starting the Mycat-server service...
STATUS | wrapper  | // :: | --> Wrapper Started as Service
STATUS | wrapper  | // :: | Launching a JVM...
INFO   | jvm     | // :: | Error: Could not create the Java Virtual Machine.
INFO   | jvm     | // :: | Error: A fatal exception has occurred. Program will exit.
INFO   | jvm     | // :: | Invalid maximum heap size: -Xmx4G
INFO   | jvm     | // :: | The specified size exceeds the maximum representable size.
ERROR  | wrapper  | // :: | JVM exited while loading the application.
INFO   | wrapper  | // :: | Waiting to start...
STATUS | wrapper  | // :: | Launching a JVM...
INFO   | jvm     | // :: | Error: Could not create the Java Virtual Machine.
INFO   | jvm     | // :: | Error: A fatal exception has occurred. Program will exit.
INFO   | jvm     | // :: | Invalid maximum heap size: -Xmx4G
INFO   | jvm     | // :: | The specified size exceeds the maximum representable size.
ERROR  | wrapper  | // :: | JVM exited while loading the application.
INFO   | wrapper  | // :: | Waiting to start...
STATUS | wrapper  | // :: | Launching a JVM...
INFO   | jvm     | // :: | Error: Could not create the Java Virtual Machine.
INFO   | jvm     | // :: | Error: A fatal exception has occurred. Program will exit.
INFO   | jvm     | // :: | Invalid maximum heap size: -Xmx4G
INFO   | jvm     | // :: | The specified size exceeds the maximum representable size.
ERROR  | wrapper  | // :: | JVM exited while loading the application.
INFO   | wrapper  | // :: | Waiting to start...
STATUS | wrapper  | // :: | Launching a JVM...
INFO   | jvm     | // :: | Error: Could not create the Java Virtual Machine.
INFO   | jvm     | // :: | Error: A fatal exception has occurred. Program will exit.
INFO   | jvm     | // :: | Invalid maximum heap size: -Xmx4G
INFO   | jvm     | // :: | The specified size exceeds the maximum representable size.
ERROR  | wrapper  | // :: | JVM exited while loading the application.
STATUS | wrapper  | // :: | Launching a JVM...
INFO   | jvm     | // :: | Error: Could not create the Java Virtual Machine.
INFO   | jvm     | // :: | Error: A fatal exception has occurred. Program will exit.
INFO   | jvm     | // :: | Invalid maximum heap size: -Xmx4G
INFO   | jvm     | // :: | The specified size exceeds the maximum representable size.
ERROR  | wrapper  | // :: | JVM exited while loading the application.
INFO   | wrapper  | // :: | Waiting to start...
FATAL  | wrapper  | // :: | There were  failed launches in a row, each lasting less than  seconds.  Giving up.
FATAL  | wrapper  | // :: |   There may be a configuration problem: please check the logs.
STATUS | wrapper  | // :: | <-- Wrapper Stopped
ERROR  | wrapper  | // :: | The Mycat-server service was launched, but failed to start.

Invalid maximum heap size: -Xmx4G，将-Xmx4G数值适当调低些，再次启动成功。
mycat console界面类似mycat\bin\startup_nowrap.bat，不过后者不会创建JVM。
适当修改schema.xml、server.xml、rule.xml，然后就可以启动Mycat啦。下面的schema.xml(注意server.xml中的</user>栏中的schemas属性要保持一致)是针对MySQL主从复制，开启Mycat的读写分离功能。4306写入，4307读取

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

    <schema name="sakila" checkSQLschema="false" sqlMaxLimit="100" dataNode="dn1">
        <!-- <table name="oc_call" primaryKey="ID" dataNode="dn1$0-743" rule="latest-month-calldate"
            /> -->
    </schema>
    <dataNode name="dn1" dataHost="localhost1" database="sakila" />
    <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"
        /> -->
    <dataHost name="localhost1" maxCon="1000" minCon="10" balance="1"
              writeType="0" dbType="mysql" dbDriver="native" switchType="-1"  slaveThreshold="100">
        <heartbeat>show slave status</heartbeat>
        <!-- can have multi write hosts -->
        <writeHost host="hostM1" url="localhost:4306" user="root"
                   password="mysql4306">
            <!-- can have multi read hosts -->
            <!--<readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" />-->
        </writeHost>
        <writeHost host="hostS1" url="localhost:4307" user="root"
                   password="mysql4307" />
        <!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> -->
    </dataHost>
</mycat:schema>

4306结点宕机后不会切换(switchType="-1")到4307结点，但4307能继续提供读取功能。如果4307结点宕机，读写将全部在4306结点。
下面这个schema.xml使用Mycat进行分片

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

    <schema name="mycatdb" checkSQLschema="false" sqlMaxLimit="100" dataNode="dn1">
        <!-- auto sharding by id (long) -->
        <table name="travelrecord" dataNode="dn$1-3" 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>
    <schema name="sakila" checkSQLschema="false" sqlMaxLimit="100" dataNode="dn4">
        <!-- <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="dn$1-3" dataHost="localhost1" database="mycatdb$1-3" />
    <dataNode name="dn4" dataHost="localhost1" database="sakila" />
    <!--<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="1"
              writeType="0" dbType="mysql" dbDriver="native" switchType="-1"  slaveThreshold="100">
        <heartbeat>select user()</heartbeat>
        <!-- can have multi write hosts -->
        <writeHost host="hostM1" url="localhost:4306" user="root"
                   password="mysql4306">
            <!-- can have multi read hosts -->
            <!--<readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" />-->
        </writeHost>
        <writeHost host="hostS1" url="localhost:4307" user="root"
                   password="mysql4307" />
        <!-- <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>

三、Mycat-Web
1、Zookeeper配置
Mycat-eye需要Zookeeper作为配置中心
1.1、解压zookeeper-3.4.8.tar.gz
1.2、zookeeper-3.4.8\conf目录下把zoo_sample.cfg修改为zoo.cfg
1.3、启动zookeeper

Windowns版本：zookeeper-3.4.\bin\zkServer.bat

2、Mycat-eye部署
2.1、解压Mycat-web-1.0-SNAPSHOT-20160617163048-win.zip
2.2、先启动Zookeeper
2.3、启动Mycat-eye

Windowns版本：mycat-web\start.bat

2.4、访问Mycat-eye
http://localhost:8082/mycat/
mycat.properties配置：mycat-web\mycat-web\WEB-INF\classes\mycat.properties