Add NTP Alerts

etc/kayobe/kolla/config/prometheus/system.rules

@@ -78,4 +78,22 @@ groups:
       summary: "Host EDAC Uncorrectable Errors detected (instance {{ $labels.instance }})"
       description: "{{ $labels.instance }} has had {{ printf \"%.0f\" $value }} uncorrectable memory errors reported by EDAC in the last 5 minutes."
 
+  - alert: HostClockSkew
+    expr: (node_timex_offset_seconds > 0.05 and deriv(node_timex_offset_seconds[5m]) >= 0) or (node_timex_offset_seconds < -0.05 and deriv(node_timex_offset_seconds[5m]) <= 0)
+    for: 2m
+    labels:
+      severity: warning
+    annotations:
+      summary: Host clock skew (instance {{ $labels.instance }})
+      description: "Clock skew detected. Clock is out of sync. Ensure NTP is configured correctly on this host."
+
+  - alert: HostClockNotSynchronising
+    expr: min_over_time(node_timex_sync_status[1m]) == 0 and node_timex_maxerror_seconds >= 16
+    for: 2m
+    labels:
+      severity: warning
+    annotations:
+      summary: Host clock not synchronising (instance {{ $labels.instance }})
+      description: "Clock not synchronising. Ensure NTP is configured on this host."
+
 {% endraw %}

releasenotes/notes/ntp-alerts-0d110b4979457165.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Adds NTP alerts to prometheus alertmanager.