Modify `Prometheus` alert settings.

cookbooks/prometheus/files/etc/prometheus.d/alerts/node_exporter.yml

@@ -1,119 +1,231 @@
 groups:
 - name: Node
   rules:
-  - alert: OutOfMemory
+  - alert: HostOutOfMemory
     expr: node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes * 100 < 10
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "Out of memory (instance {{ $labels.instance }})"
+      summary: "Host out of memory (instance {{ $labels.instance }})"
       description: "Node memory is filling up (< 10% left)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: UnusualNetworkThroughputIn
+  - alert: HostMemoryUnderMemoryPressure
+    expr: rate(node_vmstat_pgmajfault[1m]) > 1000
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: "Host memory under memory pressure (instance {{ $labels.instance }})"
+      description: "The node is under heavy memory pressure. High rate of major page faults\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostUnusualNetworkThroughputIn
     expr: sum by (instance) (irate(node_network_receive_bytes_total[2m])) / 1024 / 1024 > 100
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "Unusual network throughput in (instance {{ $labels.instance }})"
+      summary: "Host unusual network throughput in (instance {{ $labels.instance }})"
       description: "Host network interfaces are probably receiving too much data (> 100 MB/s)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: UnusualNetworkThroughputOut
+  - alert: HostUnusualNetworkThroughputOut
     expr: sum by (instance) (irate(node_network_transmit_bytes_total[2m])) / 1024 / 1024 > 100
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "Unusual network throughput out (instance {{ $labels.instance }})"
+      summary: "Host unusual network throughput out (instance {{ $labels.instance }})"
       description: "Host network interfaces are probably sending too much data (> 100 MB/s)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: UnusualDiskReadRate
+  - alert: HostUnusualDiskReadRate
     expr: sum by (instance) (irate(node_disk_read_bytes_total[2m])) / 1024 / 1024 > 50
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "Unusual disk read rate (instance {{ $labels.instance }})"
+      summary: "Host unusual disk read rate (instance {{ $labels.instance }})"
       description: "Disk is probably reading too much data (> 50 MB/s)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: UnusualDiskWriteRate
+  - alert: HostUnusualDiskWriteRate
     expr: sum by (instance) (irate(node_disk_written_bytes_total[2m])) / 1024 / 1024 > 50
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "Unusual disk write rate (instance {{ $labels.instance }})"
+      summary: "Host unusual disk write rate (instance {{ $labels.instance }})"
       description: "Disk is probably writing too much data (> 50 MB/s)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: OutOfDiskSpace
+  - alert: HostOutOfDiskSpace
-    expr: node_filesystem_free_bytes{mountpoint ="/"} / node_filesystem_size_bytes{mountpoint ="/"} * 100 < 10
+    expr: (node_filesystem_avail_bytes{mountpoint="/rootfs"}  * 100) / node_filesystem_size_bytes{mountpoint="/rootfs"} < 10
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "Out of disk space (instance {{ $labels.instance }})"
+      summary: "Host out of disk space (instance {{ $labels.instance }})"
       description: "Disk is almost full (< 10% left)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: OutOfInodes
+  - alert: HostDiskWillFillIn4Hours
-    expr: node_filesystem_files_free{mountpoint ="/"} / node_filesystem_files{mountpoint ="/"} * 100 < 10
+    expr: predict_linear(node_filesystem_free_bytes{fstype!~"tmpfs"}[1h], 4 * 3600) < 0
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "Out of inodes (instance {{ $labels.instance }})"
+      summary: "Host disk will fill in 4 hours (instance {{ $labels.instance }})"
+      description: "Disk will fill in 4 hours at current write rate\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostOutOfInodes
+    expr: node_filesystem_files_free{mountpoint ="/rootfs"} / node_filesystem_files{mountpoint ="/rootfs"} * 100 < 10
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: "Host out of inodes (instance {{ $labels.instance }})"
       description: "Disk is almost running out of available inodes (< 10% left)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: UnusualDiskReadLatency
+  - alert: HostUnusualDiskReadLatency
     expr: rate(node_disk_read_time_seconds_total[1m]) / rate(node_disk_reads_completed_total[1m]) > 100
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "Unusual disk read latency (instance {{ $labels.instance }})"
+      summary: "Host unusual disk read latency (instance {{ $labels.instance }})"
       description: "Disk latency is growing (read operations > 100ms)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: UnusualDiskWriteLatency
+  - alert: HostUnusualDiskWriteLatency
     expr: rate(node_disk_write_time_seconds_total[1m]) / rate(node_disk_writes_completed_total[1m]) > 100
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "Unusual disk write latency (instance {{ $labels.instance }})"
+      summary: "Host unusual disk write latency (instance {{ $labels.instance }})"
       description: "Disk latency is growing (write operations > 100ms)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: HighCpuLoad
+  - alert: HostHighCpuLoad
     expr: 100 - (avg by(instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) > 80
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "High CPU load (instance {{ $labels.instance }})"
+      summary: "Host high CPU load (instance {{ $labels.instance }})"
       description: "CPU load is > 80%\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: SwapIsFillingUp
+  # 1000 context switches is an arbitrary number.
+  # Alert threshold depends on nature of application.
+  # Please read: https://github.com/samber/awesome-prometheus-alerts/issues/58
+  - alert: HostContextSwitching
+    expr: (rate(node_context_switches_total[5m])) / (count without(cpu, mode) (node_cpu_seconds_total{mode="idle"})) > 1000
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: "Host context switching (instance {{ $labels.instance }})"
+      description: "Context switching is growing on node (> 1000 / s)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostSwapIsFillingUp
     expr: (1 - (node_memory_SwapFree_bytes / node_memory_SwapTotal_bytes)) * 100 > 80
     for: 5m
     labels:
       severity: warning
     annotations:
-      summary: "Swap is filling up (instance {{ $labels.instance }})"
+      summary: "Host swap is filling up (instance {{ $labels.instance }})"
       description: "Swap is filling up (>80%)\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
-  - alert: InstanceDown
+  - alert: HostSystemdServiceCrashed
-    expr: up == 0
+    expr: node_systemd_unit_state{state="failed"} == 1
-    for: 1m
+    for: 5m
-    labels:
-      severity: critical
-    annotations:
-      summary: "Instance {{ $labels.instance }} down"
-      description: "{{ $labels.instance }} has been down for more than 5 minutes."
-
-  - alert: LoadAvg
-    expr: node_load1 > 2
-    for: 1m
     labels:
       severity: warning
     annotations:
-      description: 'High Load Avg (1min) detected for instance {{ $labels.instance }}, the utilisation is currently: {{ $value }}%'
+      summary: "Host SystemD service crashed (instance {{ $labels.instance }})"
-      summary: Load Average (1min) Alert
+      description: "SystemD service crashed\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostPhysicalComponentTooHot
+    expr: node_hwmon_temp_celsius > 75
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: "Host physical component too hot (instance {{ $labels.instance }})"
+      description: "Physical hardware component too hot\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostNodeOvertemperatureAlarm
+    expr: node_hwmon_temp_alarm == 1
+    for: 5m
+    labels:
+      severity: critical
+    annotations:
+      summary: "Host node overtemperature alarm (instance {{ $labels.instance }})"
+      description: "Physical node temperature alarm triggered\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostRaidArrayGotInactive
+    expr: node_md_state{state="inactive"} > 0
+    for: 5m
+    labels:
+      severity: critical
+    annotations:
+      summary: "Host RAID array got inactive (instance {{ $labels.instance }})"
+      description: "RAID array {{ $labels.device }} is in degraded state due to one or more disks failures. Number of spare drives is insufficient to fix issue automatically.\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostRaidDiskFailure
+    expr: node_md_disks{state="fail"} > 0
+    for: 5m
+    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: HostKernelVersionDeviations
+    expr: count(sum(label_replace(node_uname_info, "kernel", "$1", "release", "([0-9]+.[0-9]+.[0-9]+).*")) by (kernel)) > 1
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: "Host kernel version deviations (instance {{ $labels.instance }})"
+      description: "Different kernel versions are running\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostOomKillDetected
+    expr: increase(node_vmstat_oom_kill[5m]) > 0
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: "Host OOM kill detected (instance {{ $labels.instance }})"
+      description: "OOM kill detected\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostEdacCorrectableErrorsDetected
+    expr: increase(node_edac_correctable_errors_total[5m]) > 0
+    for: 5m
+    labels:
+      severity: info
+    annotations:
+      summary: "Host EDAC Correctable Errors detected (instance {{ $labels.instance }})"
+      description: "{{ $labels.instance }} has had {{ printf "%.0f" $value }} correctable memory errors reported by EDAC in the last 5 minutes.\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostEdacUncorrectableErrorsDetected
+    expr: node_edac_uncorrectable_errors_total > 0
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      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.\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostNetworkReceiveErrors
+    expr: increase(node_network_receive_errs_total[5m]) > 0
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: "Host Network Receive Errors (instance {{ $labels.instance }})"
+      description: "{{ $labels.instance }} interface {{ $labels.device }} has encountered {{ printf "%.0f" $value }} receive errors in the last five minutes.\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+
+  - alert: HostNetworkTransmitErrors
+    expr: increase(node_network_transmit_errs_total[5m]) > 0
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: "Host Network Transmit Errors (instance {{ $labels.instance }})"
+      description: "{{ $labels.instance }} interface {{ $labels.device }} has encountered {{ printf "%.0f" $value }} transmit errors in the last five minutes.\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
+