Howto Munin Fastcgi¶

External Docs: http://munin-monitoring.org/wiki/CgiHowto

1. Install CGI::Fast, on Debian/Ubuntu it's in libcgi-fast-perl.
2. You don't have to set/change cgiurl_graph, just use the same value in the lighttpd config (the munin fastcgi script doesn't care). The default value is "/cgi-bin/munin-cgi-graph".
3. Set "graph_strategy cgi" in munin.conf
4. spawn the munin-fastcgi-graph FastCGI application (See recommended way to supervise it):
   

   /usr/bin/spawn-fcgi -n -s /var/run/lighttpd2/munin-fastcgi-graph.sock -u munin -U www-data -- /usr/lib/cgi-bin/munin-fastcgi-graph
   

5. setup your munin vhost for lighttpd2
   

   if req.path =^ "/cgi-bin/" {
       core.wsgi ( "/cgi-bin/munin-cgi-graph", ${ fastcgi "unix:/var/run/lighttpd2/munin-fastcgi-graph.sock"; } );
   } else {
       docroot "/var/cache/munin/www"; # or whatever your htmldir is
       index ( "index.html" );
       expire "modification 5 minutes";
   }
   

   
   You need some basics for this if you don't already have them:
   

   setup {
       module_load ( "mod_expire", "mod_fastcgi", "mod_lua" );
       lua.plugin "core.lua";
   }
   

6. example munin.conf snippet
   

   htmldir /var/cache/munin/www
   graph_strategy cgi
   cgiurl_graph /cgi-bin/munin-cgi-graph