Amoeba 實現 MySQL 讀寫分離

實驗環境：

amoeba：192.168.200.116

MySQL-master:192.168.200.111

MySQL-slave1:192.168.200.112

MySQL-slave2:192.168.200.113

client:192.168.200.100

先實現MySQL數據庫的主從複製，方法見上一篇。

1.安裝Amoeba上安裝java環境（推薦jdk1.5或1.6）

[root@localhost ~]# ls
amoeba-mysql-binary-2.2.0.tar.gz initial-setup-ks.cfg nohup.out 
anaconda-ks.cfg jdk-6u14-linux-x64.bin yum.sh

[root@localhost ~]# chmod +x jdk-6u14-linux-x64.bin

[root@localhost ~]# jdk-6u14-linux-x64.bin

一路空格，輸入yes，回車完成

[root@localhost ~]# mv jdk1.6.0_14/ /usr/local/jdk1.6
[root@localhost ~]# vim /etc/profile

末行添加

export JAVA_HOME=/usr/local/jdk1.6
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin
export AMOEBA_HOME=/usr/local/amoeba/
export PATH=$PATH:$AMOEBA_HOME/bin

[root@localhost ~]# source /etc/profile
[root@localhost ~]# java -version
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-b12)
OpenJDK 64-Bit Server VM (build 25.131-b12, mixed mode)
[root@localhost ~]# rm -rf /usr/bin/java
[root@localhost ~]# source /etc/profile
[root@localhost ~]# java -version
java version "1.6.0_14"
Java(TM) SE Runtime Environment (build 1.6.0_14-b08)
Java HotSpot(TM) 64-Bit Server VM (build 14.0-b16, mixed mode)

2.安裝配置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 755 /usr/local/amoeba/
[root@localhost ~]# /usr/local/amoeba/bin/amoeba
amoeba start|stop                                                                  //出現此行，證實配置無誤

3.配置amoeba實現mysql-slave1，slave2讀負載均衡

在三臺MySQL服務器上對amoeba受權

MariaDB [(none)]> grant all on *.* to 'admin'@'192.168.200.%' identified by '123456';
Query OK, 0 rows affected (0.00 sec)

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

編寫amoeba.xml配置文件，設置讀寫分離
[root@localhost ~]# cd /usr/local/amoeba/conf/
[root@localhost conf]# cp amoeba.xml amoeba.xml.bak
[root@localhost conf]# vim amoeba.xml

11<property name="port">8066</property>             //默認端口8066，無需修改

30<property name="user">amoeba</property>  //設置一個用戶，後面客戶端訪問時使用

32<property name="password">123456</property>       //設置登陸密碼

115<property name="defaultPool">master</property>    //默認的服務器池

117<property name="writePool">master</property>       //寫的服務器池

118<property name="readPool">slaves</property>         //讀服務器池

編輯dbServers.xml配置文件，設置登陸MySQL服務器的用戶及密碼，MySQL服務器節點的IP地址，負載均衡算法

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

20<property name="port">3306</property>           //設置MySQL鏈接端口，默認3306

26<property name="user">admin</property>         //設置訪問MySQL服務器所用的用戶名

27<property name="password">123456</property>  //設置訪問MySQL服務器所用的密碼

43<dbServer name="master" parent="abstractServer">  //設置MySQL服務器及IP地址

46<property name="ipAddress">192.168.200.111</property>

50<dbServer name="slave1" parent="abstractServer">

53<property name="ipAddress">192.168.200.112</property>

56<dbServer name="slave2" parent="abstractServer">

59<property name="ipAddress">192.168.200.113</property>

63<dbServer name="slaves" virtual="true">       //在amoeba.xml文件中設置的readPool

69<property name="poolNames">slave1,slave2</property>  //前面定義的服務器節點名

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

[root@localhost ~]# vim /usr/local/amoeba/conf/dbServers.xml
[root@localhost ~]# netstat -anpt | grep java   // 查看是否有8066端口

建立測試庫，測試表

MariaDB [(none)]> use crushlinux;

Database changed
MariaDB [crushlinux]> insert into test values(2,'slave1');
Query OK, 1 row affected (0.01 sec)

能夠在slave1和slave2上查看到該表

MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| crushlinux　　　   　 |
| db_test 　　　       　 |
| mysql 　　　　   　   |
| performance_schema |
| test　　　　　　　 　 |
+--------------------+
6 rows in set (0.01 sec)

在slave1，slave2服務器上中止主從備份，並各自添加內容

MariaDB [crushlinux]> insert into test values(2,'slave1');
Query OK, 1 row affected (0.01 sec)

MariaDB [crushlinux]> insert into test values(3,'slave2');
Query OK, 1 row affected (0.01 sec)

在客戶機測試

2和3輪詢出現

MySQL [(none)]> select * from crushlinux.test;
+------+--------+
| id | name |
+------+--------+
| 3 | slave2 |
+------+--------+
1 row in set (0.02 sec)

MySQL [(none)]> select * from crushlinux.test;
+------+--------+
| id | name |
+------+--------+
| 2 | slave1 |
+------+--------+
1 row in set (0.02 sec)

MySQL [(none)]> insert into crushlinux.test values(4,'client');
Query OK, 1 row affected (0.01 sec)

寫入數據後沒法查到，實現讀寫分離

MySQL [(none)]> select * from crushlinux.test;
+------+--------+
| id | name |
+------+--------+
| 2 | slave1 |
+------+--------+
1 row in set (0.01 sec)

MySQL [(none)]> select * from crushlinux.test;
+------+--------+
| id | name |
+------+--------+
| 3 | slave2 |
+------+--------+
1 row in set (0.02 sec)

開啓主從複製後，能夠查到寫入的內容

MySQL [(none)]> select * from crushlinux.test;
+------+--------+
| id | name |
+------+--------+
| 3 | slave2 |
| 1 | master |
| 4 | client |
+------+--------+
3 rows in set (0.01 sec)

MySQL [(none)]> select * from crushlinux.test;+------+--------+| id | name |+------+--------+| 2 | slave1 || 1 | master || 4 | client |+------+--------+3 rows in set (0.02 sec)