基于Amoeba读写分离

Amoeba

原理：amoeba相当于业务员，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，如果是读的请求，amoeba就从slave读取信息反馈给client；如果是写的请求，amoeba会将相关数据写入master。

实验设备：其中master、slave1、slave2是接上一个MYSQL主从复制操作

master：192.168.200.125

slave1:192.168.200.124

slave2：192.168.200.111

amoeba：192.168.200.130

client：192.168.200.122

Amoeba操作：安装java因为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)

1：导入amoeba以及jdk源码包并修改主配置文件

[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

[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

在末尾添加如下五行

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
# 提供客户端连接amoeba时需要使用这里设定的账号 (这里的账号密码和amoeba连接后端数据库服务器的密码无关)

<property name="user">amoeba</property>
<property name="password"></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：slave1、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"></property>
<!-- mysql schema -->
<property name="schema">test</property>
<!-- mysql user -->
<property name="user">test</property>                  #在master、slave1、slave2三台服务器中配置Amoeba访问授权的用户：
<!--  mysql password-->
<property name="password">.com</property>           #授权的密码

45行左右修改：

<dbServer name="master" parent="abstractServer">       #dbServer指定服务器为master
  <factoryConfig>
              <!-- mysql ip -->
  <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>
              <!-- mysql ip -->
  <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>
             <!-- mysql ip -->
  <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">
           <!-- Load balancing strategy: 1=ROUNDROBIN , 2=WEIGHTBASED , 3=HA-->
  <property name="loadbalance">1</property>                #声明为1表示轮询

<!-- Separated by commas,such as: server1,server2,server1 -->
  <property name="poolNames">slave1,slave2</property>      #声明组的成员

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

58行修改如下：

   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：

创建一个库以及表，会自动同步到各个从服务器上，然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)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| cmx |
| db_test |
| liuxiang |
| mysql |
| performance_schema |
+--------------------+
6 rows in set (0.00 sec)

MariaDB [(none)]> grant all on *.* to 'test'@'192.168.200.%' identified by '123.com';       #配置Amoeba的访问授权
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：

MariaDB [db_test]> select * from student;
+------+------------+----------------+
| id | name | address |
+------+------------+----------------+
| 1 | crushlinux | this_is_master |
| 4 | crushlinux | this_is_client |
+------+------------+----------------+
2 rows in set (0.00 sec)

两台slave从服务器测试操作一致：

允许200网段内的账号为test密码为123.com的主机连接数据库

MariaDB [(none)]> grant all on *.* to 'test'@'192.168.200.%' identified by '123.com';       #slave1、slave2都配置这个Amoeba的访问授权
Query OK, 0 rows affected (0.15 sec)

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

MariaDB [(none)]> show databases;                           
+--------------------+
| Database |
+--------------------+
| information_schema |
| client |
| cmx |
| db_test |
| liuxiang |
| mydb |
| mysql |
| performance_schema |
| shuifei |
| var |
| yg |
+--------------------+
11 rows in set (0.13 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

Database changed
MariaDB [db_test]> select * from student;
+------+------------+----------------+
| id | name | address |
+------+------------+----------------+
| 1 | crushlinux | this_is_master |
| 2 | crushlinux | this_is_slave1 |
+------+------------+----------------+
2 rows in set (0.00 sec)

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改为('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

+------+------------+----------------+
| id | name | address |
+------+------------+----------------+
| 1 | crushlinux | this_is_master |
| 2 | crushlinux | this_is_slave1 |
| 4 | crushlinux | this_is_client |
+------+------------+----------------+
3 rows in set (0.00 sec)

MariaDB [(none)]> select * from db_test.student;                       #slave2的测试
+------+------------+----------------+
| id | name | address |
+------+------------+----------------+
| 1 | crushlinux | this_is_master |
| 3 | crushlinux | this_is_slave2 |
| 4 | crushlinux | this_is_client |
+------+------------+----------------+
3 rows in set (0.00 sec)

Client机配置：

安装mariadb做访问amoeba机的测试

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

远程登陆mysql客户端通过指定amoeba配置文件中指定的用户名、密码、和端口以及amoeba服务器ip地址链接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

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

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

测试读操作：

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)

MySQL [db_test]> select * from student;
+------+------------+----------------+
| id | name | address |
+------+------------+----------------+
| 1 | crushlinux | this_is_master |
| 3 | crushlinux | this_is_slave2 |
+------+------------+----------------+
2 rows in set (0.01 sec)

MySQL [db_test]> select * from student;
+------+------------+----------------+
| id | name | address |
+------+------------+----------------+
| 1 | crushlinux | this_is_master |
| 2 | crushlinux | this_is_slave1 |
+------+------------+----------------+
2 rows in set (0.01 sec)

MySQL [db_test]> select * from student;
+------+------------+----------------+
| id | name | address |
+------+------------+----------------+
| 1 | crushlinux | this_is_master |
| 3 | crushlinux | this_is_slave2 |
+------+------------+----------------+
2 rows in set (0.01 sec)

 测试写操作：

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

MySQL [db_test]> select * from student;
+------+------------+----------------+
| id | name | address |
+------+------------+----------------+
| 1 | crushlinux | this_is_master |
| 2 | crushlinux | this_is_slave1 |
| 4 | crushlinux | this_is_client |
+------+------------+----------------+
3 rows in set (0.01 sec)

MySQL [db_test]> select * from student;
+------+------------+----------------+
| id | name | address |
+------+------------+----------------+
| 1 | crushlinux | this_is_master |
| 3 | crushlinux | this_is_slave2 |
| 4 | crushlinux | this_is_client |
+------+------------+----------------+
3 rows in set (0.01 sec)

测试完成可读可写！