node-exporter

alert: NodeFilesystemSpaceFillingUp
annotations:
  description: Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only
    {{ printf "%.2f" $value }}% available space left and is filling up.
  summary: Filesystem is predicted to run out of space within the next 24 hours.
expr: |
  (
    node_filesystem_avail_bytes{job="node",fstype!=""} / node_filesystem_size_bytes{job="node",fstype!=""} * 100 < 40
  and
    predict_linear(node_filesystem_avail_bytes{job="node",fstype!=""}[6h], 24*60*60) < 0
  and
    node_filesystem_readonly{job="node",fstype!=""} == 0
  )
for: 1h
labels:
  severity: warning

alert: NodeFilesystemSpaceFillingUp
annotations:
  description: Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only
    {{ printf "%.2f" $value }}% available space left and is filling up fast.
  summary: Filesystem is predicted to run out of space within the next 4 hours.
expr: |
  (
    node_filesystem_avail_bytes{job="node",fstype!=""} / node_filesystem_size_bytes{job="node",fstype!=""} * 100 < 20
  and
    predict_linear(node_filesystem_avail_bytes{job="node",fstype!=""}[6h], 4*60*60) < 0
  and
    node_filesystem_readonly{job="node",fstype!=""} == 0
  )
for: 1h
labels:
  severity: critical

alert: NodeFilesystemAlmostOutOfSpace
annotations:
  description: Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only
    {{ printf "%.2f" $value }}% available space left.
  summary: Filesystem has less than 5% space left.
expr: |
  (
    node_filesystem_avail_bytes{job="node",fstype!=""} / node_filesystem_size_bytes{job="node",fstype!=""} * 100 < 5
  and
    node_filesystem_readonly{job="node",fstype!=""} == 0
  )
for: 30m
labels:
  severity: warning

alert: NodeFilesystemAlmostOutOfSpace
annotations:
  description: Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only
    {{ printf "%.2f" $value }}% available space left.
  summary: Filesystem has less than 3% space left.
expr: |
  (
    node_filesystem_avail_bytes{job="node",fstype!=""} / node_filesystem_size_bytes{job="node",fstype!=""} * 100 < 3
  and
    node_filesystem_readonly{job="node",fstype!=""} == 0
  )
for: 30m
labels:
  severity: critical

alert: NodeFilesystemFilesFillingUp
annotations:
  description: Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only
    {{ printf "%.2f" $value }}% available inodes left and is filling up.
  summary: Filesystem is predicted to run out of inodes within the next 24 hours.
expr: |
  (
    node_filesystem_files_free{job="node",fstype!=""} / node_filesystem_files{job="node",fstype!=""} * 100 < 40
  and
    predict_linear(node_filesystem_files_free{job="node",fstype!=""}[6h], 24*60*60) < 0
  and
    node_filesystem_readonly{job="node",fstype!=""} == 0
  )
for: 1h
labels:
  severity: warning

alert: NodeFilesystemFilesFillingUp
annotations:
  description: Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only
    {{ printf "%.2f" $value }}% available inodes left and is filling up fast.
  summary: Filesystem is predicted to run out of inodes within the next 4 hours.
expr: |
  (
    node_filesystem_files_free{job="node",fstype!=""} / node_filesystem_files{job="node",fstype!=""} * 100 < 20
  and
    predict_linear(node_filesystem_files_free{job="node",fstype!=""}[6h], 4*60*60) < 0
  and
    node_filesystem_readonly{job="node",fstype!=""} == 0
  )
for: 1h
labels:
  severity: critical

alert: NodeFilesystemAlmostOutOfFiles
annotations:
  description: Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only
    {{ printf "%.2f" $value }}% available inodes left.
  summary: Filesystem has less than 5% inodes left.
expr: |
  (
    node_filesystem_files_free{job="node",fstype!=""} / node_filesystem_files{job="node",fstype!=""} * 100 < 5
  and
    node_filesystem_readonly{job="node",fstype!=""} == 0
  )
for: 1h
labels:
  severity: warning

alert: NodeFilesystemAlmostOutOfFiles
annotations:
  description: Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only
    {{ printf "%.2f" $value }}% available inodes left.
  summary: Filesystem has less than 3% inodes left.
expr: |
  (
    node_filesystem_files_free{job="node",fstype!=""} / node_filesystem_files{job="node",fstype!=""} * 100 < 3
  and
    node_filesystem_readonly{job="node",fstype!=""} == 0
  )
for: 1h
labels:
  severity: critical

alert: NodeNetworkReceiveErrs
annotations:
  description: '{{ $labels.instance }} interface {{ $labels.device }} has encountered
    {{ printf "%.0f" $value }} receive errors in the last two minutes.'
  summary: Network interface is reporting many receive errors.
expr: |
  rate(node_network_receive_errs_total[2m]) / rate(node_network_receive_packets_total[2m]) > 0.01
for: 1h
labels:
  severity: warning

alert: NodeNetworkTransmitErrs
annotations:
  description: '{{ $labels.instance }} interface {{ $labels.device }} has encountered
    {{ printf "%.0f" $value }} transmit errors in the last two minutes.'
  summary: Network interface is reporting many transmit errors.
expr: |
  rate(node_network_transmit_errs_total[2m]) / rate(node_network_transmit_packets_total[2m]) > 0.01
for: 1h
labels:
  severity: warning

alert: NodeHighNumberConntrackEntriesUsed
annotations:
  description: '{{ $value | humanizePercentage }} of conntrack entries are used.'
  summary: Number of conntrack are getting close to the limit.
expr: |
  (node_nf_conntrack_entries / node_nf_conntrack_entries_limit) > 0.75
labels:
  severity: warning

alert: NodeTextFileCollectorScrapeError
annotations:
  description: Node Exporter text file collector failed to scrape.
  summary: Node Exporter text file collector failed to scrape.
expr: |
  node_textfile_scrape_error{job="node"} == 1
labels:
  severity: warning

alert: NodeClockSkewDetected
annotations:
  description: Clock on {{ $labels.instance }} is out of sync by more than 300s. Ensure
    NTP is configured correctly on this host.
  summary: Clock skew detected.
expr: |
  (
    node_timex_offset_seconds{job="node"} > 0.05
  and
    deriv(node_timex_offset_seconds{job="node"}[5m]) >= 0
  )
  or
  (
    node_timex_offset_seconds{job="node"} < -0.05
  and
    deriv(node_timex_offset_seconds{job="node"}[5m]) <= 0
  )
for: 10m
labels:
  severity: warning

alert: NodeClockNotSynchronising
annotations:
  description: Clock on {{ $labels.instance }} is not synchronising. Ensure NTP is
    configured on this host.
  summary: Clock not synchronising.
expr: |
  min_over_time(node_timex_sync_status{job="node"}[5m]) == 0
  and
  node_timex_maxerror_seconds{job="node"} >= 16
for: 10m
labels:
  severity: warning

alert: NodeRAIDDegraded
annotations:
  description: RAID array '{{ $labels.device }}' on {{ $labels.instance }} is in degraded
    state due to one or more disks failures. Number of spare drives is insufficient
    to fix issue automatically.
  summary: RAID Array is degraded
expr: |
  node_md_disks_required{job="node",device!=""} - ignoring (state) (node_md_disks{state="active",job="node",device!=""}) > 0
for: 15m
labels:
  severity: critical

alert: NodeRAIDDiskFailure
annotations:
  description: At least one device in RAID array on {{ $labels.instance }} failed.
    Array '{{ $labels.device }}' needs attention and possibly a disk swap.
  summary: Failed device in RAID array
expr: |
  node_md_disks{state="failed",job="node",device!=""} > 0
labels:
  severity: warning

alert: NodeFileDescriptorLimit
annotations:
  description: File descriptors limit at {{ $labels.instance }} is currently at {{
    printf "%.2f" $value }}%.
  summary: Kernel is predicted to exhaust file descriptors limit soon.
expr: |
  (
    node_filefd_allocated{job="node"} * 100 / node_filefd_maximum{job="node"} > 70
  )
for: 15m
labels:
  severity: warning

alert: NodeFileDescriptorLimit
annotations:
  description: File descriptors limit at {{ $labels.instance }} is currently at {{
    printf "%.2f" $value }}%.
  summary: Kernel is predicted to exhaust file descriptors limit soon.
expr: |
  (
    node_filefd_allocated{job="node"} * 100 / node_filefd_maximum{job="node"} > 90
  )
for: 15m
labels:
  severity: critical

expr: |
  count without (cpu, mode) (
    node_cpu_seconds_total{job="node",mode="idle"}
  )
record: instance:node_num_cpu:sum

expr: |
  1 - avg without (cpu) (
    sum without (mode) (rate(node_cpu_seconds_total{job="node", mode=~"idle|iowait|steal"}[5m]))
  )
record: instance:node_cpu_utilisation:rate5m

expr: |
  (
    node_load1{job="node"}
  /
    instance:node_num_cpu:sum{job="node"}
  )
record: instance:node_load1_per_cpu:ratio

expr: |
  1 - (
    (
      node_memory_MemAvailable_bytes{job="node"}
      or
      (
        node_memory_Buffers_bytes{job="node"}
        +
        node_memory_Cached_bytes{job="node"}
        +
        node_memory_MemFree_bytes{job="node"}
        +
        node_memory_Slab_bytes{job="node"}
      )
    )
  /
    node_memory_MemTotal_bytes{job="node"}
  )
record: instance:node_memory_utilisation:ratio

expr: |
  rate(node_vmstat_pgmajfault{job="node"}[5m])
record: instance:node_vmstat_pgmajfault:rate5m

expr: |
  rate(node_disk_io_time_seconds_total{job="node", device!=""}[5m])
record: instance_device:node_disk_io_time_seconds:rate5m

expr: |
  rate(node_disk_io_time_weighted_seconds_total{job="node", device!=""}[5m])
record: instance_device:node_disk_io_time_weighted_seconds:rate5m

expr: |
  sum without (device) (
    rate(node_network_receive_bytes_total{job="node", device!="lo"}[5m])
  )
record: instance:node_network_receive_bytes_excluding_lo:rate5m

expr: |
  sum without (device) (
    rate(node_network_transmit_bytes_total{job="node", device!="lo"}[5m])
  )
record: instance:node_network_transmit_bytes_excluding_lo:rate5m

expr: |
  sum without (device) (
    rate(node_network_receive_drop_total{job="node", device!="lo"}[5m])
  )
record: instance:node_network_receive_drop_excluding_lo:rate5m

expr: |
  sum without (device) (
    rate(node_network_transmit_drop_total{job="node", device!="lo"}[5m])
  )
record: instance:node_network_transmit_drop_excluding_lo:rate5m