- alert: BlackboxEndpointDown
  expr: probe_success == 0
  labels:
    ....
  annotations:
    summary: "Endpoint {{ $labels.instance }} down"
    description: "BlackBox exporter can't scrape data from endpoint"
    runbook: https://kb.....
    status_code: |
      {{ with printf "probe_http_status_code{instance='%s'" .Labels.instance | query }} {{ . | first | value }} {{ end }}
    probe_duration: |
      {{ with printf "probe_duration_seconds{instance='%s'" .Labels.instance | query }} {{ . | first | value |humanizeDuration}} {{ end }}
    pattern_not_found: |
      {{ with printf "probe_failed_due_to_regex{instance='%s'" .Labels.instance | query }} {{ . | first | value }} {{ end }}