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jboss和apache的集群配置

2009-11-02 14:57 337 查看
说起JBoss集群好像很高深的样子,其实一点也不恐怖,建立一个集群很简单,难的是怎么针对具体的应用优化服务器和实现负载均衡(学习中^o^)。本文将带领大家在JBoss的default目录下建立一个简单的Web方面的JBoss集群。

搭建环境


两台电脑 //其实一台也够了,不过需要修改其中一个JBoss监听的端口,要不然有冲突

jboss-4.0.4.GA

apache_2.0.59 //我使用的是apache_2.0.59-win32-x86-no_ssl,其实无所谓的

mod_jk-apache-2.0.59.so //Apache请求分发的模块,官网上可以找到

首先安装JBoss,我用的是zip格式的,直接解压缩就可以了,在两台电脑里分别安装。

接下来在其中一台电脑上(这里是192.168.0.2)安装Apache(其实应该再找一台电脑来安装的),很简单,略过^o^(偶是不是很懒^o^)

配置JBoss


假设两台电脑的IP分别为192.168.0.2和192.168.0.3。我们这里使用JBoss的default目录。

将如下文件从%JBoss_Home%/server/all/lib里面拷到%JBoss_Home%/server/default/lib目录下:

jbossha.jar(加载org.jboss.ha.framework.server.ClusterPartition)

jgroups.jar(JBoss集群底层通信协议)

jboss-cache.jar(加载org.jboss.cache.aop.TreeCacheAop)

还要从%JBoss_Home%/server/all/deploy里把cluster-service.xml和tc5-cluster.sar拷贝到%JBoss_Home%/server/default/deploy里面。

编辑192.168.0.2的%JBoss_Home%/server/default/deploy/jbossweb-tomcat55.sar/server.xml

修改下面代码:



<
Engine
name
="jboss.web"
defaultHost
="localhost"
>



修改为:



<
Engine
name
="jboss.web"
defaultHost
="localhost"
jvmRoute
="node1"
>



其中 jvmRoute是用来让apache识别的节点名称,一个节点一个名称,注意不要有重复的(可以结合IP设置)。

同理编辑192.168.0.3的%JBoss_Home%/server/default/deploy/jbossweb-tomcat55.sar/server.xml

注意把jvmRoute设置为node2,可以设置成别的只要和192.168.0.2的不重复就行,但是要和Apache的workers.properties(稍后介绍)下的配置一致。

在%JBoss_Home%/server/default/deploy/jbossweb-tomcat55.sar/ROOT.war/目录下添加一个新文件夹/test,并在里面添加如下3个jsp文件:

index.jsp

1





<%



@ page contentType
=
"
text/html;charset=ISO8859_1
"

%>

2



3



<
html
>

4



<
head
>

5



<
title
>
Test
</
title
>

6



<
meta
http-equiv
="Content-Type"
content
="text/html; charset=gb2312"
>

7



</
head
>

8



9



<
body
onload
="document.form.name.focus()"
>

10



<
br
><
br
><
br
>

11



<
center
>

12



The host is :
<%
=
java.net.InetAddress.getLocalHost().toString()
%>
<
br
>

13



Your session id is :
<%
=
session.getId()
%>
<
br
>

14



Your session detail is :
<%
=
session.toString()
%>
<
br
>

15



Your session context is :
<%
=
session.getSessionContext()
%>
<
br
><
br
>

16



Please input your name:
<
br
>

17



<
form
action
="test_action.jsp"
method
="POST"
name
="form"
>

18



<
input
type
="input"
name
="name"
/>

19



<
input
type
="submit"
value
="提交"
>

20



</
form
>

21



</
center
>

22



</
body
>

23



</
html
>

24



25



test_action.jsp

1





<%



@ page contentType
=
"
text/html;charset=ISO8859_1
"

%>

2



3



<
html
>

4



<
head
>

5



<
title
>
Test Action
</
title
>

6



<
meta
http-equiv
="Content-Type"
content
="text/html; charset=gb2312"
>

7



</
head
>

8





<%



9



String
name
=
request.getParameter(
"
name
"
);

10



session.setAttribute(
"
name
"
,name);

11



String
host
=
java.net.InetAddress.getLocalHost().toString();

12



%>

13



<
body
>

14



<
br
>

15



<
br
>

16



<
center
>

17



The host is :
<%
=
host
%>
<
br
><
br
>

18



Your session id is :
<%
=
session.getId()
%>
<
br
>

19



Your session detail is :
<%
=
session.toString()
%>
<
br
>

20



Your session context is :
<%
=
session.getSessionContext()
%>
<
br
><
br
>

21



Your name is :
<%
=
name
%>
<
br
>

22



This name is set into the session.
<
br
>

23



Please click
<
a
href
="session.jsp"
>
here
</
a
>
to check the session valid or not.

24



</
center
>

25



</
body
>

26



</
html
>

27



28



session.jsp

1





<%



@ page contentType
=
"
text/html;charset=ISO8859_1
"

%>

2



3



<
html
>

4



<
head
>

5



<
title
>
Test Action
</
title
>

6



<
meta
http-equiv
="Content-Type"
content
="text/html; charset=gb2312"
>

7



</
head
>

8





<%



9



String
name
=

null
;

10



if
(session.getAttribute(
"
name
"
)!
=
null
)

11



name
=
(
String
)session.getAttribute(
"
name
"
);

12



String
host
=
java.net.InetAddress.getLocalHost().toString();

13



%>

14



<
body
>

15



<
br
>

16



<
br
>

17



<
center
>

18



The host is :
<%
=
host
%>
<
br
>

19



Your session id is :
<%
=
session.getId()
%>
<
br
>

20



Your session detail is :
<%
=
session.toString()
%>
<
br
>

21



Your session context is :
<%
=
session.getSessionContext()
%>
<
br
><
br
>

22





<%



23



if
(name!
=
null
){

24



out.print(
"
Your name is
"
+
name
+
"
<br>
"
);

25



out.print(
"
The session is valid.
"
);

26



}

27



else
{

28



out.print(
"
The session is invalid!!!
"
);

29



}

30



%>

31



<
a
href
="index.jsp"
>
Return!
</
a
>

32



</
center
>

33



</
body
>

34





<%



35



if
(session.getAttribute(
"
name
"
)!
=
null
)

36



session.invalidate();

37



%>

38



</
html
>

39



40



编辑%JBoss_Home%/server/default/deploy/jbossweb-tomcat55.sar/ROOT.war/WEB-INF/web.xml在<web-app>节点下增加如下代码:

1



<
distributable
/>

完成后web.xml代码如下:

1



<?
xml version="1.0" encoding="ISO-8859-1"
?>

2



3



<!
DOCTYPE web-app

4



PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

5



"http://java.sun.com/dtd/web-app_2_3.dtd"
>

6



7



<
web-app
>

8



<
distributable
/>

9



<
display-name
>
Welcome to JBoss
</
display-name
>

10



<
description
>

11



Welcome to JBoss

12



</
description
>

13



<
servlet
>

14



<
servlet-name
>
Status Servlet
</
servlet-name
>

15



<
servlet-class
>
org.jboss.web.tomcat.tc5.StatusServlet
</
servlet-class
>

16



</
servlet
>

17



<
servlet-mapping
>

18



<
servlet-name
>
Status Servlet
</
servlet-name
>

19



<
url-pattern
>
/status
</
url-pattern
>

20



</
servlet-mapping
>

21



</
web-app
>

22



看到第8行了吗?^o^

到这里JBoss就配置完成了^o^

配置Apache



JBoss
的Web集群使用apache的mod_jk,浏览器请求apache服务器,apache服务器根据workers.properties中的配置进行
request分发,apache服务器和Jboss中的Tomcat可以用ajp1.3进行通信的,request通过ajp1.3协议的包装被发送到
Jboss,Jboss执行后返回结果。

将下载到的mod_jk-apache-2.0.59.so保存到%Apache%/modules/目录下,并去掉版本号重命名为“mod_jk.so”,如果不改也可以在mod-jk.conf文件(稍后介绍)里修改配置。

在%Apache%/conf/目录下新建mod-jk.conf,并将如下代码添加进去:

1



# Load mod_jk module

2



# Specify the filename of the mod_jk lib

3



LoadModule jk_module modules/mod_jk.so

4



# Where to find workers.properties

5



JkWorkersFile conf/workers.properties

6



# Where to put jk logs

7



JkLogFile logs/mod_jk.log

8



# Set the jk log level [debug/error/info]

9



JkLogLevel debug

10



# Select the log format

11



JkLogStampFormat "[%a %b %d %H:%M:%S %Y]"

12



# JkOptions indicates to send SSK KEY SIZE

13



JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories

14



# JkRequestLogFormat

15



JkRequestLogFormat "%w %V %T"

16



# Mount your applications

17



#JkMount /application/* loadbalancer

18



JkMount /* loadbalancer

19



# You can use external file for mount points.

20



# It will be checked for updates each 60 seconds.

21



# The format of the file is: /url=worker

22



# /examples/*=loadbalancer

23



JkMountFile conf/uriworkermap.properties

24



# Add shared memory.

25



# This directive is present with 1.2.10 and

26



# later versions of mod_jk, and is needed for

27



# for load balancing to work properly

28



JkShmFile logs/jk.shm

29



# Add jkstatus for managing runtime data

30



<
Location
/jkstatus
/>

31



JkMount status

32



Order deny,allow

33



Deny from all

34



Allow from 127.0.0.1

35



</
Location
>

上述代码的第3行就是配置mod_jk.so模块的路径。

编辑%Apache%/conf/httpd.conf在最后一行添加如下代码:

1



Include conf/mod-jk.conf

在 %Apache%/conf/目录下添加workers.properties文件,该文件就是配置Apache所要将request转发到的JBoss的路径信息,代码如下:

1



# 定义request所要转发到的节点

2



worker.list=loadbalancer,status

3



# 定义节点 Node1

4



worker.node1.port=8009

5



worker.node1.host=192.168.0.2

6



worker.node1.type=ajp13

7



worker.node1.lbfactor=1

8



worker.node1.cachesize=10

9



# 定义节点 Node2

10



worker.node2.port=8009

11



worker.node2.host=192.168.0.3

12



worker.node2.type=ajp13

13



worker.node2.lbfactor=1

14



worker.node2.cachesize=10

15



# 负载配置

16



worker.loadbalancer.type=lb

17



worker.loadbalancer.balance_workers=node1,node2

18



worker.loadbalancer.sticky_session=0

19



worker.status.type=status

上述代码中:

port是配置JBoss AJP所监听的端口号,可以在%JBoss_Home%/server/default/deploy/jbossweb-tomcat55.sar/server.xml 看到,如下

1



<!--
A AJP 1.3 Connector on port 8009
-->

2



<
Connector
port
="8009"
address
="${jboss.bind.address}"

3



emptySessionPath
="true"
enableLookups
="false"

4



redirectPort
="8443"
protocol
="AJP/1.3"
/>

host定义JBoss所在机器的IP地址

lbfactor定义该节点的权重,数字越大分发到该节点的request越多

cachesize是servlet线程池的大小(对session复制有影响)

到这里所有的配置就全部完成啦^o^

启动192.168.0.2上的apache和两台机器上的JBoss。

打开浏览器,输入网址访问apache:http://192.168.0.2/test/index.jsp
,回车!看到了吧?

页面上有JBoss所在机器的IP地址,刷新页面还能看到IP在变化,说明apache将request分发到了不同的JBoss上,在输入框中输入随便一个字符串并提交还能测试JBoss 的session复制情况。

^o^
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