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Subdomain Logging on wildcard ServerAlias in VirtualHost

Posted on 2004-08-03
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Last Modified: 2009-06-26
I have a service that offers members their own unique subdomain - ie. http://member_name.mydomain.com

Although each members web page is customized based on the unique member_name they all point to the same directory - ie. bob.mydomain.com and steve.mydomain.com all point to the same directory.

Here is how my VirtualHost is setup for this domain:

<VirtualHost XXX.XXX.XXX.X:16080>
     ServerName mydomain.com
     ServerAlias *.mydomain.com
     ServerAdmin email_addy@mydomain.com
     DocumentRoot "/Library/WebServer/Documents/mydomain.com"
     DirectoryIndex "index.html" "index.lasso" "index.php"
     CustomLog "/var/log/httpd/access_log" "%v %{PC-Remote-Addr}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\""
     ErrorLog "/var/log/httpd/error_log"
     LogLevel warn
</VirtualHost>

Everything is working fine on the serve side however my problem lies in how I can seperate up logging for each individual member.

With this current setup all requests are being logged with %v set to mydomain.com and not member_name.mydomain.com

I need to figure out a way to log the subdomain so I can then split up the log file to offer each of my members individual statistics.

Also I have many other VirtualHosts set up on this server so using a global mod_vhost_alias with VirtualDocumentRoot is not an option.
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Question by:nextkid
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4 Comments
 
LVL 51

Expert Comment

by:ahoffmann
ID: 11713970
you need to use mod_setenv to set a (internal) variable containing the hostname, then use it in the LogFormat/Custom_Log string, something like (to be improved inmany ways):

SetenvIf HTTP_HOST membername=%{HTTP_HOST}
CustomLog "/var/log/httpd/access_log" "%{membername}e ...."
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Author Comment

by:nextkid
ID: 11913877
I seem to have fixed this by simply changing the lowercase v in the referrer to an uppercase V. Is this correct behavior? What is the technical difference between the two?
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LVL 51

Accepted Solution

by:
ahoffmann earned 1500 total points
ID: 11984038
stolen from http://httpd.apache.org/docs/mod/mod_log_config.html#formats

%...v:          The canonical ServerName of the server serving the request.
%...V:          The server name according to the UseCanonicalName setting.
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