DF wrote:
Hi,
We have the following setup:
'Net <----> Load balancer <-----> Apache 2.2.2 <-------> Apache 1.3.34
*Note: Apache 2.2.2 and 1.3.34 are on the same server, listening on
different ports.
Apache 2.2.2 is the front end web server that receives the clients
requests. It handles all requests except for URLs asking for files
with a particular extension. These files are processed by a module
that only works with Apache 1.3.x. For those "special" files, Apache
2.2.2 performs a rewrite(mod_rewite) that hands off the processing to
Apache 1.3.34. To get this to work, I had to use the
ProxyPreserveHost On option so Apache 1.3.34 would know what host to
use. Works great except for one domain. This "special" domain also
has forums that are running on a set of internal web servers.
So now I need to get a "normal" reverse proxy working,
ProxyPass/ProxyPassReverse. The problem is, this won't work with
ProxyPreserveHost On.
Here is the config (shared by Apache 2.2.2 and Apache 1.3.34):
<VirtualHost 192.168.107.37>
ServerName www.domain.com
ServerAlias domain.com
DocumentRoot /data/domain.com
<IfDefine REVERSE_PROXY>
ProxyPreserveHost On
RewriteEngine on
RewriteCond %{LA-U:SCRIPT_FILENAME} \.ext$ [NC]
RewriteRule .* http://192.168.107.37:8080%{REQUEST_URI} [P,L]
ProxyPassReverse / http://192.168.107.37:8080/
</IfDefine>
# Push through to forum server (proxy)
RewriteEngine On
RewriteRule /info/forum/(.*) /community/forum/ [R,L]
<IfModule mod_proxy.c>
ProxyPass /community/forum/ http://forums.domain.com/
ProxyPassReverse /community/forum/ http://forums.domain.com/
</IfModule>
</VirtualHost>
With this configuration:
- When I hit Apache 2.2.2 for anything but files with the 'ext'
extension, it handles it with no problems.
- When I hit Apache 2.2.2 for any file ending with .ext, it get
rewritten and passed to apache 1.3.34.
Problem:
- When I hit Apache 2.2.2 with a request for /community/forum/ I just
get redirected to the sites home page, I don't get the forums as
expected. ProxyPresearveHost is doing it's job of preserving the
host, but in this case I don't want it to. I tried putting
ProxyPreserveHost Off before the first ProxyPass entry, same result.
I tried putting it at the bottom of the <IfDefine REVERSE_PROXY>,
same problem. Can PresearveProxyhost not be turned on then off again?
Notes:
1) Apache 2.2.2 and Apache 1.3.34 are using the same Vhost config
file, defines are used to control "who sees what".
2) Apache 2.2.2 is started with -DREVERSE_PROXY so it will process the
REVERSE_PROXY block, while apache 1.3.34 is not passed any parameters,
so it ignores the REVERSE_PROXY block.
Another question, have I over complicated the situation and there is a
better solution?
Thanks,
David f.
Here is some more info...
These are the headers going back getting sent to the browser:
http://www.domain.com/community/forum/
GET /community/forum/ HTTP/1.1
Host: www.domain.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.4)
Gecko/20060508 Firefox/1.5.0.4
Accept:
text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
HTTP/1.x 301 Moved Permanently
Date: Fri, 14 Jul 2006 15:52:14 GMT
Server: Apache-AdvancedExtranetServer/1.3.31 (Mandrakelinux/7.1.101mdk)
PHP/4.3.8 mod_ssl/2.8.19 OpenSSL/0.9.7d
Location: http://www.domain.com/
Content-Type: text/html; charset=iso-8859-1
Keep-Alive: timeout=2, max=100
Connection: Keep-Alive
Transfer-Encoding: chunked
So it looks like it's not even trying the proxy, but just redirecting
right back.
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