amoeba 读写分离、负载均衡

1、amoeba配置文件

1.1 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   
        -->
        <!--管理公共配置-->
    <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>
            
            <!-- mysql schema 约束配置项 一般不动 -->
            <property name="schema">test</property>
            
            <!-- mysql user -->
            <property name="user">root</property>
            
            <property name="password">root</property>
        </factoryConfig>
        <!-- 定义连接池 -->
        <poolConfig class="com.meidusa.toolkit.common.poolable.PoolableObjectPool">
            <!-- 最大活跃数量 -->
            <property name="maxActive">500</property>
            <!-- 最大空闲数量 -->
            <property name="maxIdle">500</property>
            <!-- 最小链接数量，有个扩容效果 -->
            <property name="minIdle">1</property>
            <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>

    <!-- 配置数据库  parent集成上面的公共配置类-->
    <dbServer name="master"  parent="abstractServer">
        <factoryConfig>
            <!-- mysql ip -->
            <property name="ipAddress">192.168.174.139</property>
        </factoryConfig>
    </dbServer>
    
    <dbServer name="slave"  parent="abstractServer">
        <factoryConfig>
            <!-- mysql ip -->
            <property name="ipAddress">192.168.174.138</property>
        </factoryConfig>
    </dbServer>
    
    <!-- 实现负载均衡 主读 -->
    <dbServer name="multiPool" virtual="true">
        <poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">
            <!-- Load balancing strategy: 1=ROUNDROBIN 轮询 , 
            2=WEIGHTBASED 权重 挑选不忙的服务器访问 , 3=HA-->
            <property name="loadbalance">1</property>
            
            <!-- Separated by commas,such as: server1,server2,server1 -->
            <property name="poolNames">slave,master,slave</property>
        </poolConfig>
    </dbServer>
        
</amoeba:dbServers>

1.2编辑amoeba.xml文件

<?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 端口号 和项目中的properties中的端口号一致 -->
            <property name="port">8066</property>
            
            <!-- bind ipAddress 设置具体哪些ip能连接amoeba -->
            <!-- 
            <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">
                    <!-- 定义连接amoeba的用户名和密码 -->
                    <property name="user">root</property>
                    
                    <property name="password">root</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>
            
            <!-- 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">multiPool</property>
        
        <!-- writePool 写操作连接的库 对应dbservers.xml文件里面的name -->
        <!-- readPool 读操作连接的数据库 对应dbservers.xml文件里面的name-->
        <property name="writePool">master</property>
        <property name="readPool">multiPool</property>
        
        <property name="needParse">true</property>
    </queryRouter>
</amoeba:configuration>

1.3配置JVM

找到JVM.properties，并找到下面的参数

JVM_OPTIONS="-server -Xms256m -Xmx1024m -Xss256k -XX:PermSize=16m -XX:MaxPermSize=96m"

-Xms256m　　:jvm初始化内存大小

-Xmx1024m　　：jvm最大的内存空间

-Xss　　　　：单个线程大小，在amoeba中最小为217