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monitoring NTP

On Thu, Jul 02, 2009 at 08:11:45PM -0400, Tom Metro wrote:
> This same Ubuntu system once had a problem where ntpd mysteriously 
> exited (probably when a libc or similar update was installed, which 
> kills and restarts services), so I'm thinking its time to put some 
> monitoring in place, but I'd like something fairly light weight. A 
> script or maybe a monit config. Though simply checking that ntpd is 
> running wouldn't do it. It needs to periodically check the the delta 
> between itself and another server and complain when a threshold is 
> exceeded. That seems to be beyond what monit can do.

You need your monitor to parse the output of 

ntpq -n -c rv $host

and compare to local time.

I have such a thing, but it's written for mon, not monit.


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