Mysql基于Amoeba_读写分离搭架

一、Amoeba简介

Amoeba是一个以MySQL为底层数据存储，并对应用提供MySQL协议接口的proxy。它集中地响应应用的请求，依据用户事先设置的规则，将SQL请求发送到特定的数据库上执行。基于此可以实现负载均衡、读写分离、高可用性等需求，

Amoeba相当于一个SQL请求的路由器，目的是为负载均衡、读写分离、高可用性提供机制，而不是完全实现它们。需要结合使用MySQL的 Replication等机制来实现副本同步等功能

二、Amoeba搭建过程

在搭建amoeba过程中，我们首先需要准备环境，这里我们提供了三台Linux服务器，分别是：

Amoeba for MySQL：centos-node5(主机名）

master：centos-node6

slave：centos-node7

Amoeba 服务器，master 主服务器，slave 从服务器，服务上分别都安装了，Jdk1.7以上版本，相关jdk安装参考

http://blog.csdn.net/liulihui1988/article/details/51985517;

并且已经安装了相关的主从数据库，相关安装参考：

http://blog.csdn.net/liulihui1988/article/details/79066755

• Linux 命令下载地址：

wget http://nchc.dl.sourceforge.net/project/amoeba/Amoeba%20for%20mysql/2.x/amoeba-mysql-binary-2.1.0-RC5.tar.gz

• Amoeba 安装

命令创建amoeba文件夹，在/usr/local/amoeba目录下 执行下载以上地址

mkdir /usr/local/amoeba

执行以下命令解压在当前文件夹下

# tar xvf amoeba-mysql-binary-2.1.0-RC5.tar.gz 

• 验证Amoeba是否安装成功的命令在 /usr/local/amoeba/bin/ 目录下执行，

# ./amoeba

如上图，表示安装成功

• 修改配置文件 dbServer.xml

dbServer.xml 文件在 /usr/local/amoeba/conf/目录下 命令编辑

# vim dbServer.xml

需要修改的 代码部分

 
        <dbServer name="abstractServer" abstractive="true">
                <factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory">
                        <property name="manager">${defaultManager}property>
                        <property name="sendBufferSize">64property>
                        <property name="receiveBufferSize">128property>

                        
                        <property name="port">3306property>

                        
                        <property name="schema">testproperty>

                        
                        <property name="user">proxyuserproperty>

                        
                        <property name="password">123456property>

                factoryConfig>

                <poolConfig class="com.meidusa.amoeba.net.poolable.PoolableObjectPool">
                        <property name="maxActive">500property>
                        <property name="maxIdle">500property>
                        <property name="minIdle">10property>
                        <property name="minEvictableIdleTimeMillis">600000property>
                        <property name="timeBetweenEvictionRunsMillis">600000property>
                        <property name="testOnBorrow">trueproperty>
                        <property name="testWhileIdle">trueproperty>
                poolConfig>
        dbServer>


        
        <dbServer name="master"  parent="abstractServer">
                <factoryConfig>
                        
                        <property name="ipAddress">centos-node6property>
                factoryConfig>
        dbServer>
        
        <dbServer name="slave"  parent="abstractServer">
                <factoryConfig>
                        
                        <property name="ipAddress">centos-node7property>
                factoryConfig>
        dbServer>

        
        <dbServer name="slaves" virtual="true">
                <poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">
                        
                        <property name="loadbalance">1property>

                        
                        <property name="poolNames">slaveproperty>
                poolConfig>
        dbServer>

• 修改amoeba.xml文件，设置读写分离

 <proxy>

                
                <service name="Amoeba for Mysql" class="com.meidusa.amoeba.net.ServerableConnectionManager">
                        
                        <property name="port">8066property>

                        
                        

                        <property name="manager">${clientConnectioneManager}property>

                        <property name="connectionFactory">
                                <bean class="com.meidusa.amoeba.mysql.net.MysqlClientConnectionFactory">
                                        <property name="sendBufferSize">128property>
                                        <property name="receiveBufferSize">64property>
                                bean>
                        property>

                        <property name="authenticator">
                                <bean class="com.meidusa.amoeba.mysql.server.MysqlClientAuthenticator">
                                        
                                        <property name="user">rootproperty>
 
                                        <property name="password">rootproperty>

                                        <property name="filter">
                                                <bean class="com.meidusa.amoeba.server.IPAccessController">
                                                        <property name="ipFile">${amoeba.home}/conf/access_list.confproperty>
                                                bean>
                                        property>
                                bean>
                        property>

                service>

                
                <service name="Amoeba Monitor Server" class="com.meidusa.amoeba.monitor.MonitorServer">
                        
                        
                        
                        <property name="ipAddress">127.0.0.1property>
                        <property name="daemon">trueproperty>
                        <property name="manager">${clientConnectioneManager}property>
                        <property name="connectionFactory">
                                <bean class="com.meidusa.amoeba.monitor.net.MonitorClientConnectionFactory">bean>
                        property>

                service>

                <runtime class="com.meidusa.amoeba.mysql.context.MysqlRuntimeContext">
                        
                        <property name="readThreadPoolSize">20property>

                        
                        <property name="clientSideThreadPoolSize">30property>

                        
                        <property name="serverSideThreadPoolSize">30property>

                        
                        <property name="statementCacheSize">500property>

                        
                        <property name="queryTimeout">60property>
                runtime>

        proxy>

        
        <connectionManagerList>
                <connectionManager name="clientConnectioneManager" class="com.meidusa.amoeba.net.MultiConnectionManagerWrapper">
                        <property name="subManagerClassName">com.meidusa.amoeba.net.ConnectionManagerproperty>
                        
                connectionManager>
                <connectionManager name="defaultManager" class="com.meidusa.amoeba.net.MultiConnectionManagerWrapper">
                        <property name="subManagerClassName">com.meidusa.amoeba.net.AuthingableConnectionManagerproperty>

                        
                connectionManager>
        connectionManagerList>

                
        <dbServerLoader class="com.meidusa.amoeba.context.DBServerConfigFileLoader">
                <property name="configFile">${amoeba.home}/conf/dbServers.xmlproperty>
        dbServerLoader>

        <queryRouter class="com.meidusa.amoeba.mysql.parser.MysqlQueryRouter">
                <property name="ruleLoader">
                        <bean class="com.meidusa.amoeba.route.TableRuleFileLoader">
                                <property name="ruleFile">${amoeba.home}/conf/rule.xmlproperty>
                                <property name="functionFile">${amoeba.home}/conf/ruleFunctionMap.xmlproperty>
                        bean>
                property>
                <property name="sqlFunctionFile">${amoeba.home}/conf/functionMap.xmlproperty>
                <property name="LRUMapSize">1500property>

                
                <property name="defaultPool">masterproperty>

                
                <property name="writePool">masterproperty>
                
                <property name="readPool">slavesproperty>

                <property name="needParse">trueproperty>
        queryRouter>

Amoeba 相关配置文件结束;

三 Amoeba 读写分离 测试

• 启动amoeba服务，命令进入amoeba/bin目录执行

# ./amoeba start 

启动失败了，原因 Amoeba 启动 指定的堆栈大小太小,指定至少228k；解决办法 ：

打开bin/amoeba，DEFAULT_OPTS=”-server -Xms256m -Xmx256m -Xss128k”改成：DEFAULT_OPTS=”-server -Xms512m -Xmx512m -Xmn100m -Xss1204k”

启动成功如下：

测试 读写分离结果，我们在主数据库 写入5条数据，在链接amoeba链接的客户端查看，结果是查询5条数据，管理 slave stop 服务，在从数据库，写入一条数据，再次查询 结果多了一条数据，说明读写分离完成;

相关的参考文档：http://blog.csdn.net/liulihui1988/article/details/51985517;

http://blog.csdn.net/liulihui1988/article/details/79066755

http://www.iteye.com/topic/1113437