Added the alert for domain down

argocd-helm-charts/prometheus-linuxaid/rules/domain.yaml

@@ -0,0 +1,13 @@
+groups:
+  - name: monitor::domains
+    rules:
+    - alert: monitor::domains::status
+      expr: |
+        probe_http_status_code != 0 and probe_http_content_length > 0
+        and on(certname) obmondo_monitoring{alert_id="monitor::domains::status"} > 0
+      labels:
+        severity: critical
+        alert_id: monitor::domains::status
+      annotations:
+        summary: "For server **{{ $labels.certname }}**,this **{{ $labels.domain }}** domain is down"
+        description: Domain {{ $labels.domain }} is down for certname {{ $labels.certname }}. Please fix this.

argocd-helm-charts/prometheus-linuxaid/tests/domain.yaml

@@ -0,0 +1,28 @@
+---
+evaluation_interval: 12h
+
+rule_files:
+  - ../rules/domain.yaml
+
+tests:
+  - interval: 12h
+    input_series:
+      - series: obmondo_monitoring{certname="dev01.example", alert_id="monitor::domains::status"}
+        values: 1x1000
+      - series: probe_http_status_code{domain="example.com",certname="dev01.example"}
+        values: 200x100
+      - series: probe_http_content_length{domain="example.com",certname="dev01.example"}
+        values: 150x100
+
+    alert_rule_test:
+      - alertname: monitor::domains::status
+        eval_time: 24h
+        exp_alerts:
+          - exp_labels:
+              severity: critical
+              certname: dev01.example
+              alert_id: monitor::domains::status
+              domain: example.com
+            exp_annotations:
+              summary: "For server **dev01.example**,this **example.com** domain is down"
+              description: Domain example.com is down for certname dev01.example. Please fix this.