fix(backend): escape filters

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Fixed
 
 - Correctly set filter history.
+- Correctly escape label values when quering Prometheus for alert history.
 
 ## v0.101
 

cmd/karma/alert_history.go

@@ -313,13 +313,13 @@ func countAlerts(uri string, timeout time.Duration, transport http.RoundTripper,
 		Step:  time.Hour,
 	}
 
-	lv := []string{}
+	lv := model.LabelSet{}
 	for k, v := range labels {
 		if slices.StringInSlice(names, k) {
-			lv = append(lv, fmt.Sprintf(`%s="%s"`, k, v))
+			lv[model.LabelName(k)] = model.LabelValue(v)
 		}
 	}
-	q := fmt.Sprintf("changes(ALERTS_FOR_STATE{%s}[1h])", strings.Join(lv, ","))
+	q := fmt.Sprintf("changes(ALERTS_FOR_STATE{%s}[1h])", lv)
 	log.Debug().
 		Str("uri", uri).
 		Interface("labels", labels).

demo/generator.py

@@ -569,7 +569,7 @@ def alerts(self):
                     cluster="staging",
                     job="textfile_exporter",
                     region="SA",
-                    device="Device {} (main)".format(i % 2),
+                    device='Device {} (main) "quoted"'.format(i % 2),
                     regex="^device{}(.+)bar\\$".format(i),
                     address="10.0.0.1{}".format(i),
                     pod="my-pod",