While you could use the "query" template function to achieve this (see
https://prometheus.io/docs/prometheus/latest/configuration/template_reference/
and
https://prometheus.io/docs/prometheus/latest/configuration/template_examples/),
it's probably easiest to just make the alerting expression itself return
the value you want by only returning status codes for checks that have
failed:
expr: probe_http_status_code{job=~"blackbox_Service-HealthChecks"} and
(probe_success{job=~"blackbox_Service-HealthChecks"} == 0)
Btw., you could change the "=~" to just "=" because that regex is just
doing a full string equality match anyway.
On Fri, Apr 17, 2020 at 7:06 PM Yagyansh S. Kumar <[email protected]>
wrote:
> Hi. I am using Blackbox exporter to monitor my Application's and LB's
> HealthCheck URLs.
>
> My alert for this looks like below:
>
> - alert: ServiceHTTPChecks
> expr: probe_success{job=~"blackbox_Service-HealthChecks"} == 0
> for: 2m
> labels:
> severity: "CRITICAL"
> annotations:
> summary: "Healthcheck *{{ $labels.checkname }}* failed."
> description: *I NEED THE RESPONSE CODE THAT THE INSTANCE HAS AT THIS
> POINT OF TIME*
> identifier: "*URL:* `{{ $labels.instance }}`, *Cluster:* `{{
> $labels.cluster }}`, *node:* `{{ $labels.node }}` "
>
> Whenever the probe_success is 0, I also want the response code for my
> instance at that time which probe_success itself does not have and is
> provided by probe_http_status_code.
> My question is can I append the response code from the
> probe_http_status_code query to the labels of probe_success using the
> group_left?
> If no, what other way is there to get the response code printed in my
> alert whenever my URL is down.
> Thanks in advance!
>
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