Re: rc and smf
On Thu, Feb 24, 2005 at 11:39:36AM -0800, Matthew Dillon wrote:
> But anyhow, back to service failures... service failures do not always
> end in a crash. Take BIND for example. It is far more likely that
> BIND's cache will become corrupted then for BIND to actually crash. A
> simple 'detect that it died and restart' monitor doesn't help you there.
> What you have to do is have a program which actually goes in and uses
> the service for real. e.g. for a web server a program which connects
> to it every minute and retrieves the most complex CGI'd page it
> serves out. That's the sort of monitoring we need... not this simple
> it-dies-and-we-restart stuff. Service corruption is the far more likely
> scenario these days.
I completely agree. IBM has a nice, extensible monitoring facility for AIX,
basically a combination of sensors and trigger rules. The concept alone
is pretty simple, but that does provide mighty tools.
I'd love to have such a daemon written in a modular way for DragonFly/BSD.
It would be something like SNMP with intelligence.
Joerg
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