Merge pull request #591 from Erethon/fix-domain-alert

prometheus: Catch false positive on domain expiry

Author: mweinelt

build/pluto/prometheus/exporters/domain.nix

@@ -44,11 +44,18 @@
               rules = [
                 {
                   alert = "DomainExpiry";
-                  expr = "domain_expiry_days < 30";
+                  expr = "domain_expiry_days != -1 and domain_expiry_days < 30";
                   for = "1h";
                   labels.severity = "warning";
                   annotations.summary = "Domain {{ $labels.domain }} will expire in less than 30 days";
                 }
+                {
+                  alert = "DomainProbeFailure";
+                  expr = "domain_probe_success == 0";
+                  for = "3h";
+                  labels.severity = "warning";
+                  annotations.summary = "Domain {{ $labels.domain }} probe failing for more than 3 hours.";
+                }
               ];
             }
           ];