Mysql 基于 Amoeba 的 读写分离

   假设有这样的使用场景,有三个数据库节点分别命名为Master、Slave1、Slave2如下:

Amoeba <10.105.11.150> 		(Amoeba 服务器)
Master <10.105.11.151> 		(可读写)
Slave1 <10.105.11.152> 		(2个平等的数据库。只读/负载均衡)
Slave2 <10.105.11.153> 		(2个平等的数据库。只读/负载均衡)

   在 主从数据库 的复制的部分, 任然需要使用数据库自己的复制机制, Amoeba 不提供复制功能。

 

一、开启MYSQL数据库的主从复制功能

1.修改配置文件

 

 Master.cnf

server-id = 1 	             	 # 主数据库标志  
log-bin=mysql-bin          	 # 日志的名称	
binlog-do-db=skg		 # 同步的数据库	
binlog-ignore-db="mysql"     	 # 不同步的数据库

 

slave1.cnf

server-id = 2  			 # 备数据库标志  
replicate-do-db=skg		 # 需要同步的库
replicate-ignore-db=mysql        # 忽略的数据库
replicate-ignore-db=test         # 忽略的数据库

 

slave2.cnf

server-id = 3 		       # 备数据库标志  
replicate-do-db=skg            # 需要同步的库
replicate-ignore-db=mysql      # 忽略的数据库
replicate-ignore-db=test       # 忽略的数据库

 

2.Maste中创建两个只读权限的用户

    用户名均为:repl_user   密码均为:copy  分别开放给 slave1, slave2

mysql> grant replication slave on *.* to [email protected] identified by 'copy';  
mysql> grant replication slave on *.* to [email protected] identified by 'copy';  

 

3.查看 Master 信息

mysql> show master status;  

   Mysql 基于 Amoeba 的 读写分离

 

4.Slave1 ,Slave2 中 启动 Master - Slave 复制功能。

   分别执行以下命令

 

 

mysql> slave stop;
 
mysql> change master to
  master_host='10.105.11.151',
  master_user='repl_user',
             master_password='copy',
 master_log_file='mysql-bin.000001',
 master_log_pos=0;
 
mysql> start slave;
 
mysql> show slave status \G

   Mysql 基于 Amoeba 的 读写分离

 

 当Slave_IO_Running 和 Slave_SQL_Running 两列的值都为 "Yes",表明 Slave 的 I/O 和 SQL 线程都在正常运行,如果出现错误,可以从Last_Error这个参数中看出哪里出错,然后进行排查

 

 

5.Amoeba 读写分离的配置

 Master、Slave1、Slave2 中开放权限给 Amoeba 访问。在 Master、Slave1、Slave2 中分别执行。

 

mysql> grant all on skg.* to [email protected] identified by 'skg'; 

 

 

 

二、安装运行Amoeba

1.下载 Amoeba 

 

 在SourceForge的主页下载Amoeba,http://sourceforge.net/projects/amoeba/files/

 本例使用版本:amoeba-mysql-3.0.5-RC-distribution.zip

 

2.安装 Amoeba 

 Amoeba框架是基于Java SE1.5开发的,建议使用Java SE1.5以上的版本

 注:JDK的安装方法不再阐述

 

 把下载的压缩包解压完了之后放到 /data/setup/ 目录下即可。

# mkdir  /data/soft/amoeba
# unzip  amoeba-mysql-3.0.5-RC-distribution.zip
# /bin/cp –rf amoeba-mysql-3.0.5-RC/*  /data/setup/amoeba

 

 

3.修改 Amoeba 的配置文件

 配置文件详细说明请查看 官方文档:http://docs.hexnova.com/amoeba/rw-splitting.html

 

 dbServers.xml

<?xml version="1.0" encoding="gbk"?>
<!DOCTYPE amoeba:dbServers SYSTEM "dbserver.dtd">
<amoeba:dbServers xmlns:amoeba="http://amoeba.meidusa.com/">
	<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 -->
			<property name="schema">test</property>
			<!-- mysql user -->
			<property name="user">skg</property>
			<property name="password">skg</property>
		</factoryConfig>
		<poolConfig class="com.meidusa.toolkit.common.poolable.PoolableObjectPool">
			<property name="maxActive">500</property>
			<property name="maxIdle">500</property>
			<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>
	<dbServer name="master"  parent="abstractServer">
		<factoryConfig>
			<!-- mysql ip -->
			<property name="ipAddress">10.105.11.151</property>
		</factoryConfig>
	</dbServer>
	<dbServer name="slave1"  parent="abstractServer">
		<factoryConfig>
			<!-- mysql ip -->
			<property name="ipAddress">10.105.11.152</property>
		</factoryConfig>
	</dbServer>
	<dbServer name="slave2"  parent="abstractServer">
		<factoryConfig>
			<!-- mysql ip -->
			<property name="ipAddress">10.105.11.153</property>
		</factoryConfig>
	</dbServer>
	<dbServer name="slaves" virtual="true">
		<poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">
			<!-- Load balancing strategy: 1=ROUNDROBIN , 2=WEIGHTBASED , 3=HA-->
			<property name="loadbalance">1</property>
			<!-- Separated by commas,such as: server1,server2,server1 -->
			<property name="poolNames">slave1,slave2</property>
		</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>
			<!-- bind ipAddress -->
			<!-- 
			<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>
			<!-- Amoeba 账号,密码 -->  
			<property name="authenticateProvider">
				<bean class="com.meidusa.amoeba.mysql.server.MysqlClientAuthenticator">
					
					<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">${amoeba.home}/conf/access_list.conf</property>
						</bean>
					</property>
				</bean>
			</property>
		</service>
		<runtime class="com.meidusa.amoeba.mysql.context.MysqlRuntimeContext">
			<!-- proxy server client process thread size -->
			<property name="executeThreadSize">128</property>
			<!-- per connection cache prepared statement size  -->
			<property name="statementCacheSize">500</property>
			<!-- default charset -->
			<property name="serverCharset">utf8</property>
			<!-- query timeout( default: 60 second , TimeUnit:second) -->
			<property name="queryTimeout">60</property>
		</runtime>
	</proxy>
	<connectionManagerList>
		<connectionManager name="defaultManager" class="com.meidusa.toolkit.net.MultiConnectionManagerWrapper">
			<property name="subManagerClassName">com.meidusa.toolkit.net.AuthingableConnectionManager</property>
		</connectionManager>
	</connectionManagerList>
	<!-- default using file loader -->
	<dbServerLoader class="com.meidusa.amoeba.context.DBServerConfigFileLoader">
		<property name="configFile">${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>
		<!-- 默认数据库,主数据库 -->  
		<property name="defaultPool">master</property>
		<!-- 写数据库 -->  
		<property name="writePool">master</property>
		<!-- 读数据库,dbServer.xml 中配置的 虚拟数据库,数据库池 -->  
		<property name="readPool">slaves</property>
		<property name="needParse">true</property>
	</queryRouter>
</amoeba:configuration>

 

 Rule.xml

<?xml version="1.0" encoding="gbk"?>
<!DOCTYPE amoeba:rule SYSTEM "rule.dtd">
<amoeba:rule xmlns:amoeba="http://amoeba.meidusa.com/">
	<tableRule name="TestTable,user,message" schema="test" defaultPools="master">
</tableRule>
</amoeba:rule>	

 不需要 数据库分片时,不用配置。 但是不能没有 tableRule 元素, 否则报错。 随便写个空规则就行了。

 

4.启动 master Amoeba 

 /data/soft/amoeba/bin/lanuncher

 

 客户端连接:

 db.url=jdbc:mysql://10.105.11.150:8066/skg 

 db.username=root 

 db.password=root

 

 

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