amoeba for mysql实现 mysql读写分离;

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以上blog己经实现了mysql的主从,本文在主从的基础上用amoeba-mysql实现负载均衡,读写分离 .


amoeba:采用java NTO框架无阻塞模式;

amoeba for mysql是amoeba项目的子项目;


1、amoeba要有java环境支持:安装jdk

root@mysql-proxy src]# rpm -ivh jdk-7u67-linux-i586.rpm 
Preparing...                ########################################### [100%]
   1:jdk                    ########################################### [100%]
Unpacking JAR files...
 rt.jar...
 jsse.jar...
 charsets.jar...
 tools.jar...
 localedata.jar...
 jfxrt.jar...
 plugin.jar...
 javaws.jar...
 deploy.jar...
[root@mysql-proxy src]# cat /etc/profile.d/jdk.sh 
export JAVA_HOME=/usr/java/jdk1.7.0_67
export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre

[root@mysql-proxy src]# source /etc/profile

2、下载amoeba包:

[root@mysql-proxy src]#mkdir /usr/local/amoeba
[root@mysql-proxy src]#cd /usr/local/amoeba/
[root@mysql-proxy amoeba]#wget http://jaist.dl.sourceforge.net/project/amoeba/Amoeba%20for%20mysql/amoeba-mysql-1.3.1-BETA.zip
[root@mysql-proxy amoeba]# unzip amoeba-mysql-1.3.1-BETA.zip 
[root@mysql-proxy amoeba]# ls
amoeba-mysql-1.3.1-BETA.zip  bin  build.properties  build.xml  conf  doc  lib  
LICENSE.txt  logs  README.html  src


3、以下是我的配置文件(标红的是 需要注意或改动的地方)

[root@mysql-proxy amoeba]# cat conf/amoeba.xml  |grep -v "^$"
<?xml version="1.0" encoding="gbk"?>

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

 <server>
  <!-- proxy server绑定的端口 -->
  <property name="port">8066</property>
  <!-- proxy server绑定的IP -->
  <property name="ipAddress">192.168.0.120</property>
  <!-- proxy server net IO Read thread size -->
  <property name="readThreadPoolSize">20</property>
  <!-- proxy server client process thread size -->
  <property name="clientSideThreadPoolSize">30</property>
  <!-- mysql server data packet process thread size -->
  <property name="serverSideThreadPoolSize">30</property>
  <!-- socket Send and receive BufferSize(unit:K)  -->
  <property name="netBufferSize">128</property>
  <!-- Enable/disable TCP_NODELAY (disable/enable Nagle's algorithm). -->
  <property name="tcpNoDelay">true</property>
  <!-- 对外验证的用户名 -->
  <property name="user">root</property>
  <!-- 对外验证的密码 -->
  <property name="password">password</property>
  <!-- query timeout( default: 60 second , TimeUnit:second) -->
  <property name="queryTimeout">60</property>
 </server>
 <!--
  每个ConnectionManager都将作为一个线程启动。
  manager负责Connection IO读写/死亡检测
 -->
 <connectionManagerList>
  <connectionManager name="defaultManager" class="com.meidusa.amoeba.net.MultiConnectionManagerWrapper">
   <property name="subManagerClassName">com.meidusa.amoeba.net.AuthingableConnectionManager</property>
   
   <!--
     default value is avaliable Processors
   <property name="processors">5</property>
    -->
  </connectionManager>
 </connectionManagerList>
 
 <dbServerList>
  <!--
   一台mysqlServer 需要配置一个pool
   如果多台 平等的mysql需要进行loadBalance,
   平台已经提供一个具有负载均衡能力的objectPool:
com.meidusa.amoeba.mysql.server.MultipleServerPool
   简单的配置是属性加上 virtual="true",该Pool 不允许配置factoryConfig
   或者自己写一个ObjectPool。
  -->
  <dbServer name="server1">
   <!-- PoolableObjectFactory实现类 -->
   <factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory">
    <property name="manager">defaultManager</property>
    <!-- 真实mysql数据库端口 -->
    <property name="port">3306</property>
    <!-- 真实mysql数据库IP -->
    <property name="ipAddress">192.168.0.117</property>
    <property name="schema">test</property>
    <!-- 用于登陆mysql的用户名和密码 -->
    <property name="user">proxy</property>
    <!-- 用于登陆mysql的密码 -->
    <property name="password">proxy</property>
   </factoryConfig>
   <!-- ObjectPool实现类 -->
   <poolConfig class="com.meidusa.amoeba.net.poolable.PoolableObjectPool">
    <property name="maxActive">200</property>
    <property name="maxIdle">200</property>
    <property name="minIdle">10</property>
    <property name="minEvictableIdleTimeMillis">600000</property>
    <property name="timeBetweenEvictionRunsMillis">600000</property>
    <property name="testOnBorrow">true</property>
    <property name="testWhileIdle">true</property>
   </poolConfig>
  </dbServer>
  
  <dbServer name="server2">
   
   <!-- PoolableObjectFactory实现类 -->
   <factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory">
    <property name="manager">defaultManager</property> 
    <!-- 真实mysql数据库端口 -->
    <property name="port">3306</property>
    <!-- 真实mysql数据库IP -->
    <property name="ipAddress">192.168.0.118</property>
    <property name="schema">test</property>
    <!-- 用于登陆mysql的用户名 -->
    <property name="user">proxy</property>
    <!-- 用于登陆mysql的密码 -->
    <property name="password">proxy</property>
   </factoryConfig>
   
   <!-- ObjectPool实现类 -->
   <poolConfig class="com.meidusa.amoeba.net.poolable.PoolableObjectPool">
    <property name="maxActive">200</property>
    <property name="maxIdle">200</property>
    <property name="minIdle">10</property>
    <property name="minEvictableIdleTimeMillis">600000</property>
    <property name="timeBetweenEvictionRunsMillis">600000</property>
    <property name="testOnBorrow">true</property>
    <property name="testWhileIdle">true</property>
   </poolConfig>
  </dbServer>
  
  <dbServer name="master" virtual="true">
   <poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">
    <!-- 负载均衡参数 1=ROUNDROBIN , 2=WEIGHTBASED , 3=HA-->
    <property name="loadbalance">1</property>
    <!-- 参与该pool负载均衡的poolName列表以逗号分割 -->
    <property name="poolNames">server1</property>
   </poolConfig>
  </dbServer>


  <dbServer name="slave" virtual="true">
   <poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">
    <!-- 负载均衡参数 1=ROUNDROBIN , 2=WEIGHTBASED , 3=HA-->
    <property name="loadbalance">1</property>    
    <!-- 参与该pool负载均衡的poolName列表以逗号分割 -->
    <property name="poolNames">server1,server2</property>
   </poolConfig>
  </dbServer>
  
 </dbServerList>


 <queryRouter class="com.meidusa.amoeba.mysql.parser.MysqlQueryRouter">
  <property name="ruleConfig">${amoeba.home}/conf/rule.xml</property>
  <property name="functionConfig">${amoeba.home}/conf/functionMap.xml</property>
  <property name="ruleFunctionConfig">${amoeba.home}/conf/ruleFunctionMap.xml</property>
  <property name="LRUMapSize">1500</property>
  <property name="defaultPool">master</property>  
  <property name="writePool">master</property>
  <property name="readPool">slave</property>
  <property name="needParse">true</property>

 </queryRouter>
</amoeba:configuration>

4、在主库上对amoeba代理进行授权(只授权主库就可以,从库会自动 同步的)

mysql>GRANT ALL PRIVILEGES ON *.* TO 'proxy'@'192.168.0.120' IDENTIFIED BY PASSWORD 'proxy' WITH GRANT OPTION1;

row in set (0.00 sec)

mysql>flush privileges;

5、启动amoeba

[root@mysql-proxy amoeba]# /usr/local/amoeba/bin/amoeba &   先要给amoeba加可执行权限

[root@mysql-proxy amoeba]# ps -ef |grep amoeba
root      7686  1604  0 06:26 pts/1    00:00:22 /usr/java/jdk1.7.0_67/bin/java -server -Xms256m -Xmx256m -Xss128k -Damoeba.home=/usr/local/amoeba -Dclassworlds.conf=/usr/local/amoeba/bin/amoeba.classworlds -classpath /usr/local/amoeba/lib/classworlds-1.0.jar org.codehaus.classworlds.Launcher
root      7977  7949  0 07:25 tty1     00:00:00 vim /usr/local/amoeba/conf/amoeba.xml
root      8004  1456  0 07:38 pts/0    00:00:00 grep amoeba
[root@mysql-proxy amoeba]# netstat -tunlp |grep java
tcp        0      0 ::ffff:192.168.0.120:8066   :::*                        LISTEN      7686/java   

6、测试

测试方法:单独建一个test库,在库中建一个表jaychou,表中加一行数据,然后 mysql>slave stop;让数据不再同步,然后在主库中再加入一行数据;在amoeba上反复查询看不同;这是实现了读的测试,写的测试只要在amoeba上插入一行数据就可以了;

# mysql -uroot -ppassword -h192.168.0.120 -P8066 注意分清哪个用户名哪个密码;

mysql> select * from jaychou;
+------+
| id   |
+------+
|    1 |
|    2 |
+------+
2 rows in set (0.00 sec)

mysql> select * from jaychou;
+------+
| id   |
+------+
|    1 |
+------+
1 row in set (0.01 sec)

mysql> select * from jaychou;
+------+
| id   |
+------+
|    1 |
|    2 |
+------+
2 rows in set (0.01 sec)

mysql> select * from jaychou;
+------+
| id   |
+------+
|    1 |
+------+
1 row in set (0.00 sec)


mysql> insert into jaychou value(3);
Query OK, 1 row affected (0.01 sec)

mysql> select * from jaychou;
+------+
| id   |
+------+
|    1 |
+------+
1 row in set (0.00 sec)

mysql> select * from jaychou;
+------+
| id   |
+------+
|    1 |
|    2 |
|    3 |
+------+
3 rows in set (0.01 sec)

mysql>

 貌似达到这个效果就可以了,


amoeba还可以做负载均衡,不过对于主从两个节点的mysql cluster来说,使用roundrobin机制就可以了 ;对于多节点的mysql集群来说可以用轮循、权重、甚至可以做HA

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