Merge pull request #6581 from sapcc/email-internal-alert

adding critical alert for internal relay

prometheus-exporters/cronus-exporter/alerts/global/infra-frontend/cronus.alerts

@@ -14,6 +14,19 @@ groups:
     annotations:
       description: sending emails with aws ses relay fails
       summary: sending emails with aws ses relay fails
+  - alert: SendingEmailsWithINTFails
+    expr: sum(sum_over_time(cronus_event_mails_sent_success_provider_rate_perminute{provider="int"}[5m]) OR on() vector(0)) == 0
+    for: 15m
+    labels:
+      service: email
+      severity: critical
+      tier: os
+      playbook: docs/devops/alert/cronus/#send_email
+      kibana: "app/discover#/?_g=(filters:!(),refreshInterval:(pause:!t,value:0),time:(from:now-5m,to:now))&_a=(columns:!(_source),filters:!(('$state':(store:appState),meta:(alias:!n,disabled:!f,index:'logstash-*',key:kubernetes_labels_name,negate:!f,params:(query:cronus),type:phrase),query:(match_phrase:(kubernetes_labels_name:cronus)))),index:'logstash-*',interval:auto,query:(language:kuery,query:'%22email%20delivery%20result%20%231:%20%5C%22int%5C%22%20250%22'),sort:!())"
+      support_group: email
+    annotations:
+      description: sending emails with internal relay fails
+      summary: sending emails with internal relay fails
   - alert: SendingEmailsWithSESHighErrorRate
     expr: (sum(sum_over_time(cronus_event_mails_sent_error_provider_rate_perminute{provider="aws"}[5m]) OR on() vector(0)) ) / (sum (sum_over_time(cronus_event_mails_sent_provider_rate_perminute{provider="aws"}[5m]) OR on() vector(0))) > 0.5
     for: 15m