I'm not extremely familiar with how munin works, so I apologize if this is obvious.
I've been using munin for a couple of my projects now and I've run into this twice where I will lose all my munin graphs that were generated from past events. This just happened to me this afternoon. Now, I only have a track record of all system events since this afternoon.
Are these graphs recoverable? Is there data stored somewhere thats used to generate these graphs?
If its unrecoverable, I would like to know what could possibly have caused this to occur. Granted, each time this has happened, I was messing w/ my munin config settings. For this case, I was adding new servers to be logged by munin...I dont see how doing that would cause munin to lose all data on my other servers.
Thanks.
the data is generated from .rrd databases which are updated during 'munin-update' (usually called from 'munin-cron'). You can find those files in the directory specified by 'dbdir' in munin.conf (/var/db/munin on my site). If your graphs only show events since this afternoon, my guess is that the .rrd files got deleted/recreated/corrupted. You should be able to restore them from backup and then call 'munin-graph' and 'munin-html'. See the respective man-pages for those commands.