File status monitoring (was Re: [hobbit] 4.2 - does logfile monitoring alert on empty file?)

[Henrik Stoerner]

On Fri, Apr 07, 2006 at 01:44:14AM -0400, Asif Iqbal wrote:
> On Thu, Apr 06, 2006 at 10:26:27PM, Henrik Storner wrote:
> > On Thu, Apr 06, 2006 at 04:15:59PM -0400, John Glowacki wrote:
> > > Does the new log file monitoring have the ability to alert on empty log 
> > > files? I would like to be alerted if a log file is empty for longer than 
> > > 16, 21 or 31 minutes. Most of our systems are set to 15 or 20 minute MARK's.
> > 
> > No, it doesn't. It would be pretty easy to implement, if there's enough
> > people asking for it.
> 
> I would love to see this as well *sigh*. For most of our systems empty
> means syslog is not working even though process seems to be running

I should know better than to say "pretty easy to implement" ...  This took me 
on a somewhat longer detour than I had expected. 

Rather than just implement a check of "go red if the logfile is empty", 
I've added a new set of checks to the Hobbit client which implement
a fairly wide range of checks on files and directories.

So you can check the size of files or directories, how long it's been
since they were last updated, what owner/permissions they have, and
even do a full MD5, SHA-1 or RIPEMD160 checksum of the file data and
match it against a pre-computed value to make sure the file hasn't
been tampered with.

File- and directory-sizes can also be tracked in RRD-files, so you have
graphs showing e.g. the disk usage for the /home/henrik/hobbit/
directory.

I expect to release the next trial version in a day or two. The
adventurous ones can grab the latest snapshot, which should be very
close to the "real thing". 

(And the docs have improved).


Regards,
Henrik