Amoeba 实现MySQL读写分离

Amoeba是一个以MySQL为底层数据存储,并对应用提供MySQL协议接口的proxy,它集中地响应应用的请求,依据用户事先设置的规则,将SQL请求发送到特定的数据库上执行.基于此能够实现负载均衡、读写分离、高可用性等需求,与MySQL官方的MySQL Proxy相比,做者强调的是amoeba配置的方便.

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MySQL主从配置

1.主从服务器须要配置好主从关系,主从服务器都须要安装MySQL.

[root@localhost ~]# yum install -y mysql mysql-server

2.启动MySQL服务,并设置初始化密码(主从都要重启).

[root@localhost ~]# systemctl restart mysqld
[root@localhost ~]# mysqladmin -uroot password 123

3.修改主配置文件/etc/my.cnf并再次重启MySQL(主从都要修改).

[root@localhost ~]# vim /etc/my.cnf

log-bin=mysql-bin									#开启二进制日志文件
server-id=148										#声明本台MySQL服务器ID号

4.登录主数据库,建立用于从服务器登录的用户(主服务器).

[root@localhost ~]# mysql -uroot –p
mysql> grant replication slave on *.* to '用户名'@'%' identified by '密码'; #建立从服务器用户
mysql> show master status;                                                 #查看二进制文件名

5.登录从数据库,确认从主服务器同步数据(从服务器).

[root@localhost ~]# mysql -uroot –p
mysql> change master to master_host='主服务器IP',master_user='用户',master_password='密码',master_log_file='二进制文名',master_log_pos=文件空间大小;	 
mysql> start slave;                #启动同步功能
mysql> show slave status\G;        #查看同步状态

注意：
      Slave_IO_Running: Yes
      Slave_SQL_Running: Yes      #只用在两个选项都为YES才证实开启

<br> ## 安装Java环境+Amoeba

1.本台服务器也应安装MySQL用于登陆测试,不须要启动.

[root@localhost ~]# yum install -y mysql mysql-server

2.解压相应软件并更名.

[root@localhost ~]# tar -xzvf jdk-7u40-linux-x64.gz -C /usr/local/   #解压到jdk目录
[root@localhost ~]# mv /usr/local/jdk1.7.0_40/  /usr/local/jdk       #重命名JDK目录

3.配置JAVA环境变量,写入/etc/profile文件中,使其开机生效.

[root@localhost ~]# vim /etc/profile                      #设置开机自加载

#--------------------------------------------------------------------
#Java-SE-JDK
JAVA_HOME=/usr/local/jdk
export  JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH
CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:$CLASSPATH
export CLASSPATH
#--------------------------------------------------------------------
[root@localhost ~]# source /etc/profile                     #刷新配置文件
[root@localhost ~]# java -version                           #测试java是否可用

4.进入主从MySQL分别建立Amoeba使用的帐号(主从服务器都要建立).

[root@localhost ~]# grant all privileges on *.* to 'master'@'%' identified by '123';  #建立主服务器登录帐号
[root@localhost ~]# grant all privileges on *.* to 'slave1'@'%' identified by '123';  #建立从服务器登录帐号

5.安装Amoeba并设置权限.

[root@localhost ~]# unzip amoeba-mysql-1.3.1-BETA.zip -d /usr/local/amoeba     #解压Amoeba
[root@localhost ~]# chmod  -R a+x  /usr/local/amoeba/bin/                      #赋予可执行权限

6.编辑主配置文件,配置Amoeba.

[root@localhost ~]# vim /usr/local/amoeba/conf/amoeba.xml

<?xml version="1.0" encoding="gbk"?>
<!DOCTYPE amoeba:configuration SYSTEM "amoeba.dtd">
<amoeba:configuration xmlns:amoeba="http://amoeba.meidusa.com/">
<server>
		<property name="port">8066</property>					#指定Amoeba端口
		<property name="ipAddress">192.168.22.147</property>		#指定(Amoeba)本机IP
		<property name="readThreadPoolSize">20</property>
		<property name="clientSideThreadPoolSize">30</property>
		<property name="serverSideThreadPoolSize">30</property>
		<property name="netBufferSize">128</property>
		<property name="tcpNoDelay">true</property>
		<property name="user">root</property>					#指定Amoeba登录帐号
		<property name="password">123</property>				#指定Amoea登录密码
		<property name="queryTimeout">60</property>
</server>
<connectionManagerList>
<connectionManager name="defaultManager" class="com.meidusa.amoeba.net.MultiConnectionManagerWrapper">
<property name="subManagerClassName">com.meidusa.amoeba.net.AuthingableConnectionManager</property>
</connectionManager>
</connectionManagerList>
	
<dbServerList>
#**********************************如下是主机区域******************************************
		<dbServer name="server1">								#指定第1个server区域
			<factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory">
				<property name="manager">defaultManager</property>
				<property name="port">3306</property>				#指定主机1端口
				<property name="ipAddress">192.168.22.148</property>	#指定主机1 IP
				<property name="schema">test</property>			#同步的数据库
				<property name="user">zhu1</property>				#同步帐号
				<property name="password">123</property>			#同步密码
			</factoryConfig>
			<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">								#指定第2个server区域
			<factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory">
				<property name="manager">defaultManager</property>
				<property name="port">3306</property>				#指定主机2端口
				<property name="ipAddress">192.168.22.149</property>	#指定主机2IP
				<property name="schema">test</property>			#同步的数据库
				<property name="user">cong1</property>			#同步帐号
				<property name="password">123</property>			#同步密码
			</factoryConfig>
			<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>
#*****************************************************************************************
#*******************************如下是主机命名区域****************************************
<dbServer name="master" virtual="true">									#主机命名区域1
			<poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">
				<property name="loadbalance">1</property>
				<property name="poolNames">server1</property>			#主机1区域名
			</poolConfig>
</dbServer>
<dbServer name="slave" virtual="true">									#主机命名区域2
			<poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">
				<property name="loadbalance">1</property>
				<property name="poolNames">server2</property>			#主机2区域名
			</poolConfig>
		</dbServer>
		
</dbServerList>
#*****************************************************************************************
#**********************************如下是读写池区域***************************************
<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>					#指定默认区域
		
		<property name="writePool">master</property>					#指定写池
		<property name="readPool">slave</property>						#指定读池	
		<property name="needParse">true</property>
	</queryRouter>
</amoeba:configuration>
#*****************************************************************************************

7.打开amoeba配置文件.

[root@localhost ~]# vim /usr/local/amoeba/bin/amoeba

修改如下内容↓
DEFAULT_OPTS="-server -Xms256m -Xmx256m -Xss256k

8.启动amoeba

[root@localhost ~]# nohup bash -x /usr/local/amoeba/bin/amoeba  &

9登录数据库测试.

[root@localhost ~]# mysql -uroot -p -h 192.168.22.147 -P 8066

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