wulfweb

by Robert G. Brown Duke University Physics Department Durham, NC 27708-0305 Copyright Robert G. Brown, 2024

wulfweb is a perl script designed to take the output of wulflogger and transform it into an HTML table or a web page that can be displayed on its own or embedded in other web documents. It currently supports only a color coded load average display, but eventually it will support all the wulfstat/wulflogger display types. It is also very easy to customize using e.g. threaded perl should one need a particular mix of displayed fields or should you wish to add graphics.

The web table generated currently contains a meta statement causing the web document to be automatically refreshed after a user definable delay. A future switch will allow the meta tag to be omitted, so that although the web table will be refreshed on a selectable delay loop, the user will have to manually refresh the image in their browser to obtain the latest stats. Note that wulfweb is not a CGI script -- it is an independent polling loop script that rotates new html table images into a named file from which they can be browsed and display without any active component.

wulfweb requires wulflogger to be installed on the host where the wulfweb script runs and additionally requires xmlsysd to be installed on the monitored nodes or LAN workstations.

wulfweb is very much under construction (we're talking alpha here, not beta). There are displays missing and the code may still change its general layout as I add the missing displays and learn (the hard way) where I'm doing thing stupidly. Still, it seems to work pretty well and has now been presenting a statistical overview of our cluster load for three or four days continuously without failure or flaw. I'm trying to make it somewhat portable as I go. Feel free to contribute back any additions or improvements you make if you adopt it and adapt it.

If you need any particular output from wulflogger let me know. Eventually I'll probably come up with an output format descriptor that can be read in as input so you can roll your own format and get precisely what you want, but we're not there yet.