如何配置 Apache 作为 j2ee 服务器的代理（负载均衡器）？
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How to configure Apache to work as proxy (load balancer) for j2ee server?
提问by Vik Gamov
I have apache web server installed as frontend and I have j2ee SAP Netweaver Application Server installed in Intranet server. How can I configure apache to forward requests and response to/from j2ee app server. for example, external apache server's ip is 9.20.1.1:80. internal sap server's address is 192.168.0.1/sap/bc/gui/sap/its/webgui?sap_client=200 I want access to my sap app server for example 9.20.1.1/sapserver/sap/bc/gui/sap/its/webgui?sap_client=200
我将 apache Web 服务器安装为前端，并且在 Intranet 服务器中安装了 j2ee SAP Netweaver Application Server。我如何配置 apache 以向/从 j2ee 应用服务器转发请求和响应。例如外部apache服务器的ip是9.20.1.1:80。内部 sap 服务器的地址是 192.168.0.1/sap/bc/gui/sap/its/webgui?sap_client=200 我想访问我的 sap 应用服务器，例如 9.20.1.1/sapserver/sap/bc/gui/sap/its/ webgui?sap_client=200
采纳答案by MattMcKnight
You mentioned load balancing- so presumably you want to be able to add more Application Servers that are served through a single address. I hope they are stateless or storing session information in a database. You can use Apache to serve as a reverse proxy load balancer with mod_proxy_balancer. Docs are here.
您提到了负载平衡——因此大概您希望能够添加更多通过单个地址提供服务的应用服务器。我希望它们是无状态的或将会话信息存储在数据库中。您可以使用 Apache 作为反向代理负载均衡器mod_proxy_balancer。文档在这里。
Here's an example of what to add to your httpd.conf from this link.
这是从这个链接添加到 httpd.conf 的示例。
<Proxy balancer://myclustername>
# cluster member 1
BalancerMember http://192.168.0.1:3000
BalancerMember http://192.168.0.1:3001
# cluster member 2, the fastest machine so double the load
BalancerMember http://192.168.0.11:3000 loadfactor=2
BalancerMember http://192.168.0.11:3001 loadfactor=2
# cluster member 3
BalancerMember http://192.168.0.12:3000
BalancerMember http://192.168.0.12:3001
# cluster member 4
BalancerMember http://192.168.0.13:3000
BalancerMember http://192.168.0.13:3001
</Proxy>
<VirtualHost *:80>
ServerAdmin [email protected]
ServerName www.meinprof.de
ServerAlias meinprof.de
ProxyPass / balancer://meinprofcluster/
ProxyPassReverse / balancer://meinprofcluster/
ErrorLog /var/log/www/www.meinprof.de/apache_error_log
CustomLog /var/log/www/www.meinprof.de/apache_access_log combined
</VirtualHost>
回答by jrwren
This is often mistakenly referred to as a reverse proxy. If you use a search engine to find "reverse proxy apache" you will get many good results.
这通常被错误地称为反向代理。如果您使用搜索引擎查找“反向代理apache”，您会得到很多不错的结果。
The quick answer is to add something like this to your apache.conf
快速回答是将这样的内容添加到您的 apache.conf
ProxyPass /sap/ 192.168.0.1/sap/
< Location /sap/ >
ProxyPassReverse /sap/< /Location >
ProxyPass /sap/ 192.168.0.1/sap/
<位置/sap/>
ProxyPassReverse /sap/</位置>
See also the modrewrite rools and the [P] option.
另请参阅 modrewrite 角色和 [P] 选项。
回答by Mark Roddy
Assuming you have mod_proxy enabled, add to you're sites-available:
假设您启用了 mod_proxy，请添加到您可用的站点：
ProxyRequests Off
<Location "/sapserver">
ProxyPass http://192.168.0.1
ProxyPassReverse http://192.168.0.1
</Location>
Be careful though as this does expose your internal site to the entire internet.
不过要小心，因为这确实会将您的内部网站暴露给整个互联网。
