added more alerts

files/core_alerts.yml

@@ -139,5 +139,37 @@ groups:
     annotations:
       summary: HTTP2 Server (instance {{ $labels.instance }} {{ $labels.domain }})
       description: "The HTTP2 check has failed. The Server is unavailable.\n VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
- 
+  - 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.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
+  - alert: HostRaidDiskFailure
+    expr: node_md_disks{state="failed"} > 0
+    for: 2m
+    labels:
+      severity: warning
+    annotations:
+      summary: Host RAID disk failure (instance {{ $labels.instance }})
+      description: "At least one device in RAID array on {{ $labels.instance }} failed. Array {{ $labels.md_device }} needs attention and possibly a disk swap\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
+  - alert: UnusualDiskReadLatency
+    expr: rate(node_disk_read_time_seconds_total[1m]) / rate(node_disk_reads_completed_total[1m]) > 100
+    for: 30m
+    labels:
+      severity: warning
+    annotations:
+      summary: "Unusual disk read latency (instance {{ $labels.instance }})"
+      description: "Disk latency is growing (read operations > 100ms)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+  - alert: UnusualDiskWriteLatency
+    expr: rate(node_disk_write_time_seconds_total[1m]) / rate(node_disk_writes_completed_total[1m]) > 100
+    for: 30m
+    labels:
+      severity: warning
+    annotations:
+      summary: "Unusual disk read latency (instance {{ $labels.instance }})"
+      description: "Disk latency is growing (read operations > 100ms)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+