Julien, Deadman is the answer here, it is designed with this exact use case in mind. I have replied to your other post, we should be able to get it working shortly.
On Monday, November 7, 2016 at 9:06:11 AM UTC-7, Julien Ammous wrote: > > Thanks for your reply, having COUNT() return null makes no sense to mean > but I suppose that's a design choice, it does not explains my second issue > though, is there any way to do what I wanted ? > > I tried this since deadman does not appear to work either for me (my other > post on the mailing list), I initially hoped that kapacitor might help me > remove my own code to raise the alert but I doubt that more and more as I > play with it... :( > > > On 7 November 2016 at 16:38, Sean Beckett <[email protected] > <javascript:>> wrote: > >> COUNT returns null, not zero, if there are no matching points: >> https://github.com/influxdata/influxdb/issues/6412 >> >> On Mon, Nov 7, 2016 at 3:49 AM, Julien Ammous <[email protected] >> <javascript:>> wrote: >> >>> Hi, >>> I still trying to figure out how tick scripts works, my latest attempt >>> is this: >>> >>> batch >>> |query('select COUNT(*) from metrics.raw.loss') >>> .period(10s) >>> .every(10s) >>> .groupBy(time(10s)) >>> |httpOut('out') >>> >>> I also tried that way: >>> >>> batch >>> |query('select * from metrics.raw.loss') >>> .period(10s) >>> .every(10s) >>> |count('value') >>> |httpOut('out') >>> >>> >>> In both cases I get weird results... >>> >>> My first issue is that the http endpoint contains nothing as long as no >>> points are returned by the query, which makes no sense to me since I am >>> querying the count not the data themselves >>> >>> The second issue is that once 1 or more row are available the http page >>> is updated and that is fine but started from then the page will never be >>> updated again, let's say I insert a row and wait, I will get a correct json >>> with a count value of 1, now I insert two other rows and wait and... >>> nothing, the http output still says count 1 and the timestamp didn't change >>> althought I saw the query executed on the influxdb server console. >>> >>> That's really frustrating, a lot of hidden things seems to happen behind >>> the scene and that's a real pain to debug, the task http endpoint helps a >>> bit but not that much... >>> >>> >>> >>> >>> >>> >>> >>> -- >>> Remember to include the version number! >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "InfluxData" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected] <javascript:>. >>> To post to this group, send email to [email protected] >>> <javascript:>. >>> Visit this group at https://groups.google.com/group/influxdb. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/influxdb/e28f42ff-89cf-4d28-a0b1-cd58fae11be9%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/influxdb/e28f42ff-89cf-4d28-a0b1-cd58fae11be9%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Sean Beckett >> Director of Support and Professional Services >> InfluxDB >> >> -- >> Remember to include the version number! >> --- >> You received this message because you are subscribed to a topic in the >> Google Groups "InfluxData" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/influxdb/S6rIMs3Xeys/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> Visit this group at https://groups.google.com/group/influxdb. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/influxdb/CALGqCvM-AU5hLW-LAXcDhdHZq%2BwBKcq-wbqf_thW43Y80GpzFQ%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/influxdb/CALGqCvM-AU5hLW-LAXcDhdHZq%2BwBKcq-wbqf_thW43Y80GpzFQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> >> For more options, visit https://groups.google.com/d/optout. >> > > -- Remember to include the version number! --- You received this message because you are subscribed to the Google Groups "InfluxData" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/influxdb. To view this discussion on the web visit https://groups.google.com/d/msgid/influxdb/a6445f4a-dcab-4e19-9a2e-3415c01fff82%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
