amoeba实现mysql读写分离

前提：3台安装了mysql服务的centos64，其中两台已经实现了主从集群，以下以master和slave代替称呼（参考http://blog.youkuaiyun.com/qq_26702601/article/details/78924440）

第三台需要安装jdk1.5以上的版本（amoeba安装需要用到Java虚拟机）

1、安装amoeba

1.1 官网下载ameoba，存放到/usr/local目录下

      1.2 进入该目录 cd /usr/local; 解压安装包 tar -zxvf  amoeba-mysql-binary-2.2.0.tar.gz; 修改解压后的文件夹名字；mv  amoeba-mysql-binary-2.2.0.tar amoeba

1.3 修改配置文件 cd /usr/local/amoeba/conf 

dbServers.xml

<?xml version="1.0" encoding="gbk"?>

<!DOCTYPE amoeba:dbServers SYSTEM "dbserver.dtd">
<amoeba:dbServers xmlns:amoeba="http://amoeba.meidusa.com/">

        <!-- 
            Each dbServer needs to be configured into a Pool,
            If you need to configure multiple dbServer with load balancing that can be simplified by the following configuration:
             add attribute with name virtual = "true" in dbServer, but the configuration does not allow the element with name factoryConfig
             such as 'multiPool' dbServer   
        -->
        
    <dbServer name="abstractServer" abstractive="true">
        <factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory">
            <property name="connectionManager">${defaultManager}</property>
            <property name="sendBufferSize">64</property>
            <property name="receiveBufferSize">128</property>
                
            <!-- mysql port -->
            <property name="port">3306</property>　　#设置Amoeba要连接的mysql数据库的端口，默认是3306
            
            <!-- mysql schema -->
            <property name="schema">testdb</property>　　#设置缺省的数据库，当连接amoeba时，操作表必须显式的指定数据库名，即采用dbname.tablename的方式，不支持 use dbname指定缺省库，因为操作会调度到各个后端dbserver
            
            <!-- mysql user -->
            <property name="user">test1</property>　　#设置amoeba连接后端数据库服务器的账号和密码，因此需要在所有后端数据库上创建该用户，并授权amoeba服务器可连接
            
            <property name="password">111111</property>
        </factoryConfig>

        <poolConfig class="com.meidusa.toolkit.common.poolable.PoolableObjectPool">
            <property name="maxActive">500</property>　　#最大连接数，默认500
            <property name="maxIdle">500</property>　　　　#最大空闲连接数
            <property name="minIdle">1</property>　　　　#最新空闲连接数
            <property name="minEvictableIdleTimeMillis">600000</property>
            <property name="timeBetweenEvictionRunsMillis">600000</property>
            <property name="testOnBorrow">true</property>
            <property name="testOnReturn">true</property>
            <property name="testWhileIdle">true</property>
        </poolConfig>
    </dbServer>

    <dbServer name="writedb"  parent="abstractServer">　　#设置一个后端可写的dbServer，这里定义为writedb，这个名字可以任意命名，后面还会用到
        <factoryConfig>
            <!-- mysql ip -->
            <property name="ipAddress">192.168.2.204</property> #设置后端可写dbserver
        </factoryConfig>
    </dbServer>
    
    <dbServer name="slave"  parent="abstractServer">　　#设置后端可读dbserver
        <factoryConfig>
            <!-- mysql ip -->
            <property name="ipAddress">192.168.2.205</property>
        </factoryConfig>
    </dbServer>
    
    <dbServer name="myslave" virtual="true">　　#设置定义一个虚拟的dbserver，实际上相当于一个dbserver组，这里将可读的数据库ip统一放到一个组中，将这个组的名字命名为myslave
        <poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">
            <!-- Load balancing strategy: 1=ROUNDROBIN , 2=WEIGHTBASED , 3=HA-->
            <property name="loadbalance">1</property>　　#选择调度算法，1表示复制均衡，2表示权重，3表示HA， 这里选择1
            
            <!-- Separated by commas,such as: server1,server2,server1 -->
            <property name="poolNames">slave</property>　　#myslave组成员
        </poolConfig>
    </dbServer>
        
</amoeba:dbServers>

amoeba.xml

<?xml version="1.0" encoding="gbk"?>

<!DOCTYPE amoeba:configuration SYSTEM "amoeba.dtd">
<amoeba:configuration xmlns:amoeba="http://amoeba.meidusa.com/">

    <proxy>
    
        <!-- service class must implements com.meidusa.amoeba.service.Service -->
        <service name="Amoeba for Mysql" class="com.meidusa.amoeba.mysql.server.MySQLService">
            <!-- port -->
            <property name="port">8066</property>　　　　#设置amoeba监听的端口，默认是8066
            
            <!-- bind ipAddress -->　　　　#下面配置监听的接口，如果不设置，默认监听所以的IP
            <!-- 
            <property name="ipAddress">127.0.0.1</property>
             -->
            
            <property name="connectionFactory">
                <bean class="com.meidusa.amoeba.mysql.net.MysqlClientConnectionFactory">
                    <property name="sendBufferSize">128</property>
                    <property name="receiveBufferSize">64</property>
                </bean>
            </property>
            
            <property name="authenticateProvider">
                <bean class="com.meidusa.amoeba.mysql.server.MysqlClientAuthenticator">
                    

1. # 提供客户端连接amoeba时需要使用这里设定的账号 (这里的账号密码和amoeba连接后端数据库服务器的密码无关)

                    <property name="user">root</property>　　　　

                    
                    <property name="password">123456</property>
                    
                    <property name="filter">
                        <bean class="com.meidusa.toolkit.net.authenticate.server.IPAccessController">
                            <property name="ipFile">${amoeba.home}/conf/access_list.conf</property>
                        </bean>
                    </property>
                </bean>
            </property>
            
        </service>
        
        <runtime class="com.meidusa.amoeba.mysql.context.MysqlRuntimeContext">
            
            <!-- proxy server client process thread size -->
            <property name="executeThreadSize">128</property>
            
            <!-- per connection cache prepared statement size  -->
            <property name="statementCacheSize">500</property>
            
            <!-- default charset -->
            <property name="serverCharset">utf8</property>
            
            <!-- query timeout( default: 60 second , TimeUnit:second) -->
            <property name="queryTimeout">60</property>
        </runtime>
        
    </proxy>
    
    <!-- 
        Each ConnectionManager will start as thread
        manager responsible for the Connection IO read , Death Detection
    -->
    <connectionManagerList>
        <connectionManager name="defaultManager" class="com.meidusa.toolkit.net.MultiConnectionManagerWrapper">
            <property name="subManagerClassName">com.meidusa.toolkit.net.AuthingableConnectionManager</property>
        </connectionManager>
    </connectionManagerList>
    
        <!-- default using file loader -->
    <dbServerLoader class="com.meidusa.amoeba.context.DBServerConfigFileLoader">
        <property name="configFile">${amoeba.home}/conf/dbServers.xml</property>
    </dbServerLoader>
    
    <queryRouter class="com.meidusa.amoeba.mysql.parser.MysqlQueryRouter">
        <property name="ruleLoader">
            <bean class="com.meidusa.amoeba.route.TableRuleFileLoader">
                <property name="ruleFile">${amoeba.home}/conf/rule.xml</property>
                <property name="functionFile">${amoeba.home}/conf/ruleFunctionMap.xml</property>
            </bean>
        </property>
        <property name="sqlFunctionFile">${amoeba.home}/conf/functionMap.xml</property>
        <property name="LRUMapSize">1500</property>
        <property name="defaultPool">writedb</property>　　#设置amoeba默认的池，这里设置为writedb
        
        
        <property name="writePool">writedb</property>　　#这两个选项默认是注销掉的，需要取消注释，这里用来指定前面定义好的俩个读写池
        <property name="readPool">myslave</property>　　 #
        
        <property name="needParse">true</property>
    </queryRouter>
</amoeba:configuration>

启动

/usr/local/amoeba/bin/amoeba&