My guess is: when the plugin queries over a large time range, it is sending a large step time to the prometheus API <https://prometheus.io/docs/prometheus/latest/querying/api/#range-queries>, which is skipping over the times of interest.
Now, you can argue that this is a problem with the way that the panel queries Prometheus. However, querying a 1 month range with a 30 second step would be extremely inefficient (returning ~86,000 data points). So really, it would be better if you were to have a *counter* of how many times a 502 status code is returned, and then the plugin can calculate a rate over each step. You can use a recording rule, running at the same interval as your blackbox scrapes, to increment a counter for each 502 response from blackbox_exporter. (Incidentally, the query that you've posted is syntactically invalid - it has mismatched quotes) On Monday, 7 March 2022 at 14:20:13 UTC [email protected] wrote: > Hi Team, > > We use a discrete plugin(panel) in Grafana to display the data from > blackbox_exporter to track the end-point(URL) availability and prometheus > data retention period is 50 days. This panel shows URL available and > unavailable time in percentage. > > Issue is smaller down time (E.g: 502 return code for 1hr ) is getting > ignored when we select a larger time range in Grafana (above 1 month) and > the panel is showing 100% URL available. But if we select a smaller time > frame in Grafana, the URL unavailable time is displayed. > > Suspecting issue with below query mentioned in panel. Can somebody please > provide a solution for this issue ? > > > *Prom query Used in Grafana discrete plugin * > probe_httpd_status_code{instance="https://xxxxxxx > ",job=blackbox-generic-endpoints"} > > > Prometheus Version - 2.31.0 > Blackbox exporter - 0.13.0 > Grafana Version - 6.7.4 > Scrape_interval: 30s > > Thanks and regards > SreeHari > -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/5a281000-2be7-4f9b-8e9d-2062be33d99fn%40googlegroups.com.
