基于Amoeba读写分离

时间 2019-11-08

标签基于 amoeba 读写分离繁體版

原文原文链接

Amoeba

原理：amoeba至关于业务员，处理client的读写请求，并将读写请求分开处理。amoeba和master以及slave都有联系，若是是读的请求，amoeba就从slave读取信息反馈给client；若是是写的请求，amoeba会将相关数据写入master。java

实验设备：其中master、slave一、slave2是接上一个MYSQL主从复制操做mysql

master：192.168.200.125linux

slave1:192.168.200.124sql

slave2：192.168.200.111数据库

amoeba：192.168.200.130apache

client：192.168.200.122vim

Amoeba操做：安装java由于Amoeba是基于jdk1.5版本开发的(版本1.5-1.7不建议使用高版本)后端

1：导入amoeba以及jdk源码包并修改主配置文件tomcat

[root@localhost ~]# rz
z waiting to receive.**B0100000023be50
[root@localhost ~]# ls
amoeba-mysql-binary-2.2.0.tar.gz apache-tomcat-8.5.40.tar.gz jdk-7u65-linux-x64.tar.gz
anaconda-ks.cfg initial-setup-ks.cfg original-ks.cfg服务器

[root@localhost ~]# tar xf jdk-7u65-linux-x64.tar.gz
[root@localhost ~]# mv jdk1.7.0_65/ /usr/local/java

[root@localhost ~]# vim /etc/profile

在末尾添加以下五行

JAVA_HOME=/usr/local/java
CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
PATH=$PATH:$JAVA_HOME/lib:$JAVA_HOME/jre/bin:$HOME/bin

AMOEBA_HOME=/usr/local/amoeba
PATH=$PATH:$AMOEBA_HOME/bin

[root@localhost ~]# source /etc/profile
[root@localhost ~]# java -version

2：删除高版本java程序文件

[root@localhost ~]# rm -rf /usr/bin/java
[root@localhost ~]# source /etc/profile
[root@localhost ~]# java -version

3：安装并配置Amoeba

[root@localhost ~]# mkdir /usr/local/amoeba
[root@localhost ~]# tar xf amoeba-mysql-binary-2.2.0.tar.gz -C /usr/local/amoeba/
[root@localhost ~]# chmod -R 775 /usr/local/amoeba/

4：配置Amoeba读写分离。两个slave读负载均衡

编辑amoeba.xml配置文件

[root@localhost ~]# cd /usr/local/amoeba/conf/
[root@localhost conf]# ls
access_list.conf amoeba.xml dbServers.xml functionMap.xml log4j.xml ruleFunctionMap.xml
amoeba.dtd dbserver.dtd function.dtd log4j.dtd rule.dtd rule.xml

[root@localhost conf]# cp amoeba.xml amoeba.xml.bak

[root@localhost conf]# vim amoeba.xml


35行左右修改用户名和登入密码
# 提供客户端链接amoeba时须要使用这里设定的帐号 (这里的帐号密码和amoeba链接后端数据库服务器的密码无关)

<property name="user">amoeba</property>
<property name="password">123456</property>

115行左右修改

<property name="defaultPool">master</property> #默认找master

<property name="writePool">master</property> #写的值交给master
<property name="readPool">slaves</property> #读交给slaves（slaves包括：slave一、slave2）

[root@localhost conf]# cp dbServers.xml dbServers.xml.bak

[root@localhost conf]# vim dbServers.xml

23行左右修改：

<property name="port">3306</property>
<!-- mysql schema -->
<property name="schema">test</property>
<!-- mysql user -->
<property name="user">test</property>                  #在master、slave一、slave2三台服务器中配置Amoeba访问受权的用户：
<!--  mysql password-->
<property name="password">123.com</property>           #受权的密码

45行左右修改：

<dbServer name="master" parent="abstractServer"> #dbServer指定服务器为master
<factoryConfig>

<property name="ipAddress">192.168.200.125</property> #dbServer指定服务器为ip
</factoryConfig>
</dbServer>

<dbServer name="slave1" parent="abstractServer"> #dbServer指定服务器为slave1
<factoryConfig>

<property name="ipAddress">192.168.200.124</property> #dbServer指定服务器为ip
</factoryConfig>
</dbServer>

<dbServer name="slave2" parent="abstractServer"> #dbServer指定服务器为slave2
<factoryConfig>

<property name="ipAddress">192.168.200.111</property> #dbServer指定服务器为ip
</factoryConfig>
</dbServer>

66行左右修改：

<dbServer name="slaves" virtual="true"> #声明组为slaves
<poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">

<property name="loadbalance">1</property> #声明为1表示轮询

<property name="poolNames">slave1,slave2</property> #声明组的成员

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

58行修改以下：

   原：DEFAULT_OPTS="-server -Xms256m -Xmx256m -Xss128k"

修改后：DEFAULT_OPTS="-server -Xms256m -Xmx256m -Xss256k"

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

max_allowed_packet = 16M

5：配置无误后，启动Amoeba软件，默认端口为TCP协议8066

[root@localhost conf]# /usr/local/amoeba/bin/amoeba start &

[root@localhost conf]# netstat -anpt | grep 8066
tcp6 0 0 :::8066 :::* LISTEN 18841/java

6：关闭防火墙
[root@localhost conf]# systemctl stop firewalld
[root@localhost conf]# iptables -F
[root@localhost conf]# setenforce 0

master主机服务器测试：

建立一个库以及表，会自动同步到各个从服务器上，而后关掉各个服务器上的slave功能，再分别插入语句测试

MariaDB [(none)]> create database db_test;
Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> grant all on *.* to 'test'@'192.168.200.%' identified by '123.com'; #配置Amoeba的访问受权
Query OK, 0 rows affected (0.15 sec)

MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.01 sec)

MariaDB [(none)]> use db_test;
Database changed

MariaDB [db_test]> create table student(id int(10),name varchar(10),address varchar(20));
Query OK, 0 rows affected (0.01 sec)

MariaDB [db_test]> insert into student(id,name,address) values('1','crushlinux','this_is_master');
Query OK, 1 row affected (0.01 sec)

master测试来自client的数据：

两台slave从服务器测试操做一致：

容许200网段内的帐号为test密码为123.com的主机链接数据库

MariaDB [(none)]> grant all on *.* to 'test'@'192.168.200.%' identified by '123.com'; #slave一、slave2都配置这个Amoeba的访问受权
Query OK, 0 rows affected (0.15 sec)

MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.01 sec)

MariaDB [(none)l]> use db_test;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

MariaDB [(none)]> stop slave; #主服务器插入完数据后再执行stop slave
Query OK, 0 rows affected (0.01 sec)

MariaDB [db_test]> insert into student values('2','crushlinux','this_is_slave1'); #slave2改成('3,'crushlinux','this_is_slave2');
Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> start slave;
Query OK, 0 rows affected (0.00 sec)

测试来自client的数据：

MariaDB [(none)]> select * from db_test.student; #slave1的测试

Client机配置：

安装mariadb作访问amoeba机的测试

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

远程登录mysql客户端经过指定amoeba配置文件中指定的用户名、密码、和端口以及amoeba服务器ip地址连接mysql数据库

[root@localhost ~]# mysql -u amoeba -p123456 -h 192.168.200.130 -P 8066
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection id is 411716403
Server version: 5.1.45-mysql-amoeba-proxy-2.2.0

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

测试读操做：

MySQL [db_test]> select * from student;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id: 1696547550
Current database: db_test

+------+------------+----------------+
| id | name | address |
+------+------------+----------------+
| 1 | crushlinux | this_is_master |
| 2 | crushlinux | this_is_slave1 |
+------+------------+----------------+
2 rows in set (0.20 sec)

测试写操做：

MySQL [db_test]> insert into student values('4','crushlinux','this_is_client');
Query OK, 1 row affected (0.01 sec)

测试完成可读可写！