Amoeba(變形蟲(chóng))項(xiàng)目是一個(gè)開(kāi)源框架,于2008年開(kāi)始發(fā)布一款 Amoeba for Mysql軟件;
這個(gè)軟件致力于MySQL的分布式數(shù)據(jù)庫(kù)前端代理層,它主要在應(yīng)用層訪問(wèn)MySQL的時(shí)候充當(dāng)SQL路由功能,專(zhuān)注于分布式數(shù)據(jù)庫(kù)代理層(Database Proxy)開(kāi)發(fā);位于 Client、DB Server(s)之間,對(duì)客戶端透明;
===================================================================
1 簡(jiǎn)介
2 準(zhǔn)備
? ?2.1 時(shí)間同步
? ?2.2 配置MySQL主從復(fù)制架構(gòu)
3 ameoba安裝配置
? ?3.1 安裝配置JDK
? ?3.2 安裝ameoba
? ?3.3 配置ameoba
? ?3.4 使用驗(yàn)證
? ?3.5 后期擴(kuò)展
4 問(wèn)題記錄
===================================================================
?
1 簡(jiǎn)介
Amoeba(變形蟲(chóng))項(xiàng)目是一個(gè)開(kāi)源框架,于2008年開(kāi)始發(fā)布一款 Amoeba for Mysql軟件;
這個(gè)軟件致力于MySQL的分布式數(shù)據(jù)庫(kù)前端代理層,它主要在應(yīng)用層訪問(wèn)MySQL的時(shí)候充當(dāng)SQL路由功能,專(zhuān)注于分布式數(shù)據(jù)庫(kù)代理層(Database Proxy)開(kāi)發(fā);位于 Client、DB Server(s)之間,對(duì)客戶端透明;
具有負(fù)載均衡、高可用性、SQL 過(guò)濾、讀寫(xiě)分離、可路由相關(guān)的請(qǐng)求到目標(biāo)數(shù)據(jù)庫(kù)、可并發(fā)請(qǐng)求多臺(tái)數(shù)據(jù)庫(kù)并合并結(jié)果;
通過(guò)Amoeba你能夠完成多數(shù)據(jù)源的高可用、負(fù)載均衡、數(shù)據(jù)切片的功能,目前Amoeba已在很多企業(yè)的生產(chǎn)線上面使用;
?
2 準(zhǔn)備
2.1 時(shí)間同步
# crontab -
e
# Dscrip: Time Sync
# CTime:
2014.03
.
23
*/
5
* * * * /usr/sbin/ntpdate
172.16
.
0.1
&>/dev/
null
2.2 配置MySQL主從復(fù)制架構(gòu)
詳見(jiàn)博文" MariaDB 主從復(fù)制 "
?
3 ameoba安裝配置
3.1 安裝配置JDK
chmod
+x jdk-6u31-linux-x64-
rpm.bin
vi
/etc/profile.d/java.
sh
# 采用bin文件安裝jdk
export JAVA_HOME
=/usr/java/
latest
export PATH
=$JAVA_HOME/bin:$PATH
3.2 安裝ameoba
mkdir
/usr/local/
amoeba
tar
xf amoeba-mysql-binary-
2.2
.
0
.
tar
.gz -C /usr/local/
amoeba # 使用二進(jìn)制程序文件安裝amoeba
cd
/usr/local/
amoeba
bin
/
amoeba start # 前臺(tái)運(yùn)行
nohup
/usr/local/amoeba/bin/amoeba start &
# 后臺(tái)運(yùn)行
mysql
-h127.
0.0
.
1
-uroot -p -P8066 # amoeba默認(rèn)監(jiān)聽(tīng)端口為8066
3.3 配置ameoba
cd /usr/local/amoeba/
conf
vi
ameoba.xml # 前端定義配置文件
# 修改ameoba前端監(jiān)聽(tīng)端口
<service name=
"
Amoeba for Mysql
"
class=
"
com.meidusa.amoeba.net.ServerableConnectionManager
"
>
<property name=
"
port
"
>
3306
</property>
# 默認(rèn)端口是8066,修改為3306,便于實(shí)現(xiàn)前端程序連接數(shù)據(jù)庫(kù)的透明性
# 修改連接amoeba接口的認(rèn)證信息
<property name=
"
authenticator
"
>
<bean class=
"
com.meidusa.amoeba.mysql.server.MysqlClientAuthenticator
"
>
<property name=
"
user
"
>root</property>
<property name=
"
password
"
>mypass</property>
# 添加登錄密碼
# 查詢路由設(shè)置
<queryRouter class=
"
com.meidusa.amoeba.mysql.parser.MysqlQueryRouter
"
>
<property name=
"
ruleLoader
"
>
<bean class=
"
com.meidusa.amoeba.route.TableRuleFileLoader
"
>
<property name=
"
ruleFile
"
>${amoeba.home}/conf/rule.xml</property>
<property name=
"
functionFile
"
>${amoeba.home}/conf/ruleFunctionMap.xml</property>
</bean>
</property>
<property name=
"
sqlFunctionFile
"
>${amoeba.home}/conf/functionMap.xml</property>
<property name=
"
LRUMapSize
"
>
1500
</property>
<property name=
"
defaultPool
"
>master</property>
# 設(shè)定默認(rèn)節(jié)點(diǎn)
<property name=
"
writePool
"
>master</property>
# 設(shè)定可寫(xiě)節(jié)點(diǎn),節(jié)點(diǎn)定義見(jiàn)dbServers.xml文件
<property name=
"
readPool
"
>readservers</property>
# 設(shè)定只讀池,可配置多個(gè)slave節(jié)點(diǎn)
<property name=
"
needParse
"
>
true
</property>
</queryRouter>
vi
dbServers.xml # 后端節(jié)點(diǎn)配置文件
# 定義抽象服務(wù)器,為每個(gè)后端MySQL服務(wù)器提供默認(rèn)連接配置
<dbServer name=
"
abstractServer
"
abstractive=
"
true
"
>
<factoryConfig class=
"
com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory
"
>
<property name=
"
manager
"
>${defaultManager}</property>
<property name=
"
sendBufferSize
"
>
64
</property>
<property name=
"
receiveBufferSize
"
>
128
</property>
<property name=
"
port
"
>
3406
</property>
<property name=
"
schema
"
>test</property>
<property name=
"
user
"
>root</property>
<property name="password">
magedu
</property>
</factoryConfig>
# 定義后端MySQL的IP地址,一個(gè)master,一個(gè)slave
<dbServer name=
"
master
"
parent=
"
abstractServer
"
>
<factoryConfig>
<property name=
"
ipAddress
"
>
192.168
.
0.45
</property>
</factoryConfig>
</dbServer>
<dbServer name=
"
slave
"
parent=
"
abstractServer
"
>
<factoryConfig>
<property name=
"
ipAddress
"
>
192.168
.
0.46
</property>
</factoryConfig>
</dbServer>
# 定義虛擬服務(wù)器組,即只讀池readservers
<dbServer name=
"
readservers
"
virtual=
"
true
"
>
<poolConfig class=
"
com.meidusa.amoeba.server.MultipleServerPool
"
>
<property name=
"
loadbalance
"
>
1
</property>
<property name=
"
poolNames
"
>master,slave</property>
</poolConfig>
</dbServer>
3.4 使用驗(yàn)證
在主庫(kù)上授權(quán):
MariaDB [(none)]> grant all on *.* to
'
root
'
@
'
172.16.%.%
'
identified by
'
magedu
'
;
Query OK,
0
rows affected (
0.00
sec)
MariaDB [(none)]
> grant all on *.* to
'
root
'
@
'
%mysql.com
'
identified by
'
magedu
'
; # 這里的密碼應(yīng)該與dbServer.xml中的數(shù)據(jù)庫(kù)密碼一致
Query OK,
0
rows affected (
0.00
sec)
MariaDB [(none)]
>
flush privileges;
Query OK,
0
rows affected (
0.00
sec)
# 登錄驗(yàn)證
[root@mysql conf]# mysql
-h127.
0.0
.
1
-uroot -p -
P3306
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection
id
is
2097086015
Server version:
5.1
.
45
-mysql-amoeba-proxy-
2.2
.
0
Source distribution
Copyright (c)
2000
,
2014
, Oracle, SkySQL Ab and others.
Type
'
help;
'
or
'
\h
'
for
help. Type
'
\c
'
to
clear
the current input statement.
MySQL [(none)]
>
show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.
000030
|
326
| | |
+------------------+----------+--------------+------------------+
1
row
in
set (
0.00
sec)
MySQL [(none)]
>
# 讀寫(xiě)驗(yàn)證
[root@mysql conf]# mysql
-h127.
0.0
.
1
-uroot -p -
P3306
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection
id
is
2097086015
Server version:
5.1
.
45
-mysql-amoeba-proxy-
2.2
.
0
Source distribution
Copyright (c)
2000
,
2014
, Oracle, SkySQL Ab and others.
Type
'
help;
'
or
'
\h
'
for
help. Type
'
\c
'
to
clear
the current input statement.
MySQL [(none)]
>
create database amoeba_test;
Query OK,
1
row affected (
0.04
sec)
MySQL [(none)]
>
[root@mysql bin]# mysql
-h127.
0.0
.
1
-uroot -p -
P3406
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection
id
is
33
Server version:
10.0
.
10
-MariaDB-
log Source distribution
Copyright (c)
2000
,
2014
, Oracle, SkySQL Ab and others.
Type
'
help;
'
or
'
\h
'
for
help. Type
'
\c
'
to
clear
the current input statement.
MariaDB [(none)]
>
show databases;
+--------------------+
| Database |
+--------------------+
| amoeba_test |
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
9
rows
in
set (
0.01
sec)
MariaDB [(none)]
>
# 從amoeba接口登錄創(chuàng)建數(shù)據(jù)庫(kù)amoeba_test后,再?gòu)闹鲙?kù)的接口中去查詢數(shù)據(jù)庫(kù)已創(chuàng)建,說(shuō)明寫(xiě)入確實(shí)是落在了主庫(kù)節(jié)點(diǎn)上;
# 若要驗(yàn)證ameoba對(duì)于讀操作的調(diào)度,則需要暫時(shí)停止從庫(kù)的復(fù)制操作,然后在主庫(kù)上更新數(shù)據(jù),這樣從ameoba讀取數(shù)據(jù)將出現(xiàn)不一致的情況;
3.5 后期擴(kuò)展
利用MMM雙主復(fù)制架構(gòu)+Amoeba代理,可以實(shí)現(xiàn)對(duì)MySQL的高可用性和高性能;
關(guān)于MMM的內(nèi)容參加博文" MySQL Scale Out "
4 問(wèn)題記錄
現(xiàn)象 :使用mysql -uroot -p -P8066命令始終無(wú)法連接進(jìn)入ameoba的配置接口,一直都是進(jìn)入mysql數(shù)據(jù)庫(kù)的配置接口
原因 :在測(cè)試環(huán)境下,ameoba和mysql的主庫(kù)都部署在同一臺(tái)主機(jī)上,當(dāng)啟動(dòng)ameoba服務(wù)后,即使指定-P8066連接,mysql客戶端還是默認(rèn)采用可被識(shí)別的socket文件(/tmp/mysql.sock)連接,同樣指定-hlocalhost也是一樣的;
當(dāng)使用mysql命令連接mysqld時(shí):
-
連接主機(jī)為localhost或不指定時(shí),mysql會(huì)采用Unix Socket的連接方式;
-
連接主機(jī)為127.0.0.1時(shí),mysql會(huì)采用TCP的方式連接;
解決方法 :指定-h127.0.0.1連接即可,即mysql -h127.0.0.1 -uroot -p -P8066
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