Re: Transparent front-end proxying for many VirtualHosts
On Wed, 5 Mar 2003, Andrew Ho wrote: I want to simplify my configuration in two ways. I'd prefer not to maintain two sets of VirtualHost configuration data, and I'd like it if the block that proxies .pl files to the backend proxy not be replicated per VirtualHost. With the details you provided the best advice, as others have given, is mod_macro or making the httpd.conf from a template. I usually do the latter. If you added more details, for example a sample httpd.conf for the proxy and the backend it would be easier to help. Do you use 2.0 for the proxy? http://httpd.apache.org/docs-2.0/mod/mod_proxy.html#proxypreservehost is often helpful. RewriteOptions inherit might also help simplify your configuration. The conceptual behavior I want, is for FilesMatch \.pl$ to be proxied by the backend server, and everything else by the frontend. I've tried many combinations which don't work, which I can post if it's relevant... Please do. :-) [...] Does anybody have a pointer to a setup that looks like this? Maybe I am completely misunderstanding the problem, but a guess would be something like the following in the proxy: ProxyPreserveHost yes RewriteRule ^/(.*\.pl) http://localhost:1234/$1 [P] virtualhost _default_ ServerName foo.example.com RewriteEngine on RewriteOptions inherit /virtualhost virtualhost _default_ ... - ask -- ask bjoern hansen, http://www.askbjoernhansen.com/ !try; do();
Re: Transparent front-end proxying for many VirtualHosts
Hi Andrew - I want to simplify my configuration in two ways. I'd prefer not to maintain two sets of VirtualHost configuration data, and I'd like it if the block that proxies .pl files to the backend proxy not be replicated per VirtualHost. Have you looked at mod_macro? Depending on how similar your virtual hosts are to each other, it might be useful. For example, suppose you set up config files like so: FrontEndMacros.cfg: Macro MyVirtualHost $host $dir VirtualHost * ServerName $host DocumentRoot $dir LocationMatch \.pl$ RewriteRule ...rule to proxy to backend... /LocationMatch ...other frontend config stuff... /VirtualHost /Macro BackEndMacros.cfg: Macro MyVirtualHost $host $dir VirtualHost * ServerName $host DocumentRoot $dir ...other backend config stuff... /VirtualHost /Macro MyVirtualHosts.cfg: Use MyVirtualHost www.siteA.com /path/to/siteA/htdocs Use MyVirtualHost www.siteB.com /path/to/siteB/htdocs Use MyVirtualHost www.siteC.com /path/to/siteC/htdocs httpd.conf for frontend: Listen 1.2.3.4:80 NameVirtualHost * Include FrontEndMacros.cfg Include MyVirtualHosts.cfg httpd.conf for backend: Listen 127.0.0.1:8080 NameVirtualHost * Include BackEndMacros.cfg Include MyVirtualHosts.cfg This could let you maintain just one included file that defined the list of virtual hosts, and even though the proxying block would be replicated for each frontend host, at least you wouldn't have to do that manually. You could probaly even combine the macro definitions in FrontEndMacros.cfg and BackEndMacros.cfg with some appropriately placed IfDefine blocks. More mod_macro info is at: http://www.coelho.net/mod_macro/ (It says it's an Apache 2 module but version 1.1.2 works with Apache 1.3.X) HTH, Larry Leszczynski [EMAIL PROTECTED]
Re: Transparent front-end proxying for many VirtualHosts
Good afternoon, On 5/3/03 at 3:30 PM, Andrew Ho [EMAIL PROTECTED] wrote: I have an Apache with many VirtualHosts, and I want to setup proxying so that a lightweight frontend Apache with mod_rewrite/mod_proxy proxies Apache::Registry script requests back to a heavyweight backend Apache running on a localhost-only port. I want to simplify my configuration in two ways. I'd prefer not to maintain two sets of VirtualHost configuration data, and I'd like it if the block that proxies .pl files to the backend proxy not be replicated per VirtualHost. I use mod_macro and IfDefine directives to simplify virtual host setups with backend server. First I do the bulk of the config in httpd.conf as usual (seperate conf files for frontend and mod_perl) and then use Include directive to load files (one for each virt host) from a directory. Each included conf file is loaded by both frontend mod_perl servers and IfDefine controls which parts are used for each server. This is a short sample file (the Use directives are for mod_macro): IfDefine IS_FRONT_END VirtualHost 10.8.168.70:80 Use mSiteRoot gcs garrison.com.au Use mSiteLogs_frontend gcs Use mSiteUserGroup gcs Use mSiteRootDirOptions gcs Use mSiteCgiBinDirOptions gcs Use mSetupRewrite Use mSiteRewriteRules /VirtualHost /IfDefine IfDefine IS_PERL VirtualHost 10.8.168.70:8520 Use mSiteRoot gcs garrison.com.au Use mSiteLogs_modperl gcs Use mSiteUserGroup gcs Use mSiteRootDirOptions gcs Use mSitePerlBinDirOptions gcs /VirtualHost /IfDefine This setup doesn't put all the rewrite config in the main conf file, but it does centralize it all to make maintenance much easier. And there is only one conf file for each virt host. Charlie -- Charlie Garrison[EMAIL PROTECTED] PO Box 141, Windsor, NSW 2756, Australia
Re: Transparent front-end proxying for many VirtualHosts
On Wed, 2003-03-05 at 18:30, Andrew Ho wrote: I want to simplify my configuration in two ways. I'd prefer not to maintain two sets of VirtualHost configuration data, and I'd like it if the block that proxies .pl files to the backend proxy not be replicated per VirtualHost. As others pointed out, mod_macro is good for this. Personally, I tend to solve problems like this by generating my httpd.conf with a template and a tiny Perl script. That allows me to do absolutely anything in it, including looking up data from a database to use in the conf file. - Perrin
