[collectd] Curl output value threshold

Jeremy Hanna jeremy.hanna1234 at gmail.com
Wed Mar 10 18:51:21 CET 2010


Thanks for the response.  I've tried to change the Type and DSType to gauge and GaugeLast since it should just  look for the last value it received.  However now it records 0.00000 instead of 1 in the csv output file.  It should just record 1.

Also, I did a test of the regex against the specific test of the web page using egrep, which should be using the extended POSIX regular expression capabilities, and it matched.  So it should be matching.

Maybe I'm on my way to getting it working, but it seems like the value in the csv should be a 1 and the threshold should see the 1.


On Mar 9, 2010, at 4:13 PM, Florian Forster wrote:

> Hi Jeremy,
> On Mon, Mar 08, 2010 at 11:27:25AM -0600, Jeremy Hanna wrote:
>> 		<Match>
>> 			Regex "Live Nodes</a>.*?([0-9]+)<tr"
>> 			DSType "CounterSet"
>> 			Type "counter"
>> 			Instance "live-nodes"
>> 		</Match>
> this looks like the information you're collecting here is "the number of
> nodes currently running". That's a number that can go up when a host is
> added and down if one is removed.
> For this kind of data you should use a GAUGE based data set, for example
> the data set named "gauge". The "DSType" option should then be set to
> one of the "Gauge*" settings, for example "GaugeAverage".
> I'm also surprised the regular expression compiles and returns anything:
> We're using the "Extended POSIX Regular Expressions", and as far as I
> know they don't support the non-greedy "*?" operator. The regex(7)
> manual page should be able to tell you in detail.
> Regards,
> --octo
> -- 
> Florian octo Forster
> Hacker in training
> GnuPG: 0x91523C3D
> http://verplant.org/

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