amoeba + mysql-mmm 实现读写分离

mysql-mmm配置请查看：http://lihuipeng.blog.51cto.com/3064864/689064

mysql-mmm只是把数据库的读写功能分离出来，对于web服务器不可能说我要执行读的功能就连接哪个IP，要执行写的功能就连接哪个IP，这是不可能的，解决这一问题我使用amoeba（变形虫）数据库透明代理，根据执行的sql可自动路由至相应的Ip，很好地结合mysql-mmm真正实现读写分离。

整个拓扑如下：

amoeba服务器我也安装在server4上，下面是我的安装步骤：

一、安装java

wget http://download.oracle.com/otn-pub/java/jdk/6u25-b06/jdk-6u25-linux-i586.bin chmod 755 jdk-6u25-linux-i586.bin ./jdk-6u25-linux-i586.bin mv jdk1.6.0_25/ /usr/local/jdk

配置环境变量vi /etc/profile

export JAVA_HOME=/usr/local/jdk/ export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=$JAVA_HOME/bin:$PATH

使文件即时生效

source /etc/profile

检查

[root@localhost opt]# java -version java version "1.6.0_25" Java(TM) SE Runtime Environment (build 1.6.0_25-b06) Java HotSpot(TM) Client VM (build 20.0-b11, mixed mode, sharing)

二、安装amoeba

mkdir /usr/local/amoeba mv amoeba-mysql-binary-2.1.0-RC5.tar.gz  /usr/local/amoeba/ cd /usr/local/amoeba/ tar zxvf amoeba-mysql-binary-2.1.0-RC5.tar.gz chmod 755 bin/* cd bin/ ./amoeba

运行amoeba会显现如下信息

[root@localhost bin]# ./amoeba amoeba start|stop

三、配置读写分离

Amoeba的配置分成几个文件：

amoeba.xml      需要修改 主配置文件，配置所有数据源及Amoeba自身的参数

dbServer.xml     需要修改

access_list.conf    需要修改

rule.xml         数据切分时使用

log4j.xml         无需修改

functionMap.xml 无需修改        配置用于解析Query中的函数所对应的Java实现类nullFunctionMap.xml 无需修改     配置路由规则中需要使用到的特定函数的实现类。

 dbServer.xml

${defaultManager}                         64                         128                                                 3306                                                 test                                                 lihuipeng                                                 lihuipeng                                          ……                                                                         192.168.93.141                                                                                                 192.168.93.142                                                                                                 192.168.93.144                                                                                                 1                                                 server2,server3

定义dbserver的时候，记得参考mmm_control show的信息，关键是write角色的机器一定要用write的ip

[root@localhost ~]# mmm_control show   db1(192.168.93.137) master/ONLINE. Roles: reader(192.168.93.143), writer(192.168.93.141)   db2(192.168.93.138) master/ONLINE. Roles: reader(192.168.93.142)   db3(192.168.93.139) slave/ONLINE. Roles: reader(192.168.93.144)

amoeba.xml

amoeba                                         amoeba                                                                                                                                                 ${amoeba.home}/conf/access_list.conf                                                                                                                                                   ……                                                                               ${amoeba.home}/conf/rule.xml                                 ${amoeba.home}/conf/ruleFunctionMap.xml                                                         ${amoeba.home}/conf/functionMap.xml                 1500                 server1                 server1                 ReadPool                 true

第一处修改web数据库可以连接使用的帐号密码，第二处修改amoeba读 写对应的server，该server就是我们之前定义的。

启动amoeba

nohup /usr/local/amoeba/bin/amoeba start &

查看进程

[root@localhost conf]# netstat -tunlp | grep java tcp        0      0 :::8066                     :::*                        LISTEN      28426/java          tcp        0      0 ::ffff:127.0.0.1:19356      :::*                        LISTEN      28426/java

测试登陆

[root@localhost conf]# mysql -uamoeba -pamoeba -P8066 -h192.168.93.140 Welcome to the MySQL monitor.  Commands end with ; or \g. Your MySQL connection id is 17244592 Server version: 5.1.45-mysql-amoeba-proxy-2.1.0-RC5 Source distribution Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> show databases; +--------------------+ | Database           | +--------------------+ | information_schema | | test               | +--------------------+ 2 rows in set (0.02 sec)

配置完了！想测试读写分离效果的童鞋，可以将三台db的主从先关掉，然后在各个库插入一条不同的数据，然后登陆amoeba进行多次搜索就可以看到结果了！