feat: Add default alerting rule for build failure SLO
diff --git a/deploy/operator-prometheus-rule.yaml b/deploy/operator-prometheus-rule.yaml
index 6a009dd..0d6ca96 100644
--- a/deploy/operator-prometheus-rule.yaml
+++ b/deploy/operator-prometheus-rule.yaml
@@ -68,3 +68,16 @@
             message: |
               {{ printf "%0.0f" $value }}% of the successful builds
               for {{ $labels.job }} have their duration above 5m.
+        - alert: CamelKBuildFailure
+          expr: |
+            sum(rate(camel_k_build_duration_seconds_count{result="Error"}[5m])) by (job)
+            /
+            sum(rate(camel_k_build_duration_seconds_count[5m])) by (job)
+            * 100
+            > 1
+          for: 10m
+          labels:
+            severity: warning
+          annotations:
+            message: |
+              {{ printf "%0.0f" $value }}% of the builds for {{ $labels.job }} have failed.