apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: {{ printf "%s-%s" (include "kubezero-lib.fullname" $) "node-exporter" | trunc 63 | trimSuffix "-" }}
  namespace: {{ .Release.Namespace }}
  labels:
    {{- include "kubezero-lib.labels" . | nindent 4 }}
spec:
  groups:
  - name: node-exporter
    rules:
    - alert: NodeFilesystemSpaceFillingUp
      annotations:
        description: Filesystem on {{`{{`}} $labels.device {{`}}`}} at {{`{{`}} $labels.instance {{`}}`}} has only {{`{{`}} printf "%.2f" $value {{`}}`}}% available space left and is filling up.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefilesystemspacefillingup
        summary: Filesystem is predicted to run out of space within the next 24 hours.
      expr: "(\n  node_filesystem_avail_bytes{job=\"node-exporter\",fstype!=\"\"} / node_filesystem_size_bytes{job=\"node-exporter\",fstype!=\"\"} * 100 < 15\nand\n  predict_linear(node_filesystem_avail_bytes{job=\"node-exporter\",fstype!=\"\"}[6h], 24*60*60) < 0\nand\n  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\"} == 0\n)\n"
      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.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefilesystemspacefillingup
        summary: Filesystem is predicted to run out of space within the next 4 hours.
      expr: "(\n  node_filesystem_avail_bytes{job=\"node-exporter\",fstype!=\"\"} / node_filesystem_size_bytes{job=\"node-exporter\",fstype!=\"\"} * 100 < 10\nand\n  predict_linear(node_filesystem_avail_bytes{job=\"node-exporter\",fstype!=\"\"}[6h], 4*60*60) < 0\nand\n  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\"} == 0\n)\n"
      for: 1h
      labels:
        severity: critical
    - alert: NodeFilesystemAlmostOutOfSpace
      annotations:
        description: Filesystem on {{`{{`}} $labels.device {{`}}`}} at {{`{{`}} $labels.instance {{`}}`}} has only {{`{{`}} printf "%.2f" $value {{`}}`}}% available space left.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefilesystemalmostoutofspace
        summary: Filesystem has less than 5% space left.
      expr: "(\n  node_filesystem_avail_bytes{job=\"node-exporter\",fstype!=\"\"} / node_filesystem_size_bytes{job=\"node-exporter\",fstype!=\"\"} * 100 < 5\nand\n  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\"} == 0\n)\n"
      for: 30m
      labels:
        severity: warning
    - alert: NodeFilesystemAlmostOutOfSpace
      annotations:
        description: Filesystem on {{`{{`}} $labels.device {{`}}`}} at {{`{{`}} $labels.instance {{`}}`}} has only {{`{{`}} printf "%.2f" $value {{`}}`}}% available space left.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefilesystemalmostoutofspace
        summary: Filesystem has less than 3% space left.
      expr: "(\n  node_filesystem_avail_bytes{job=\"node-exporter\",fstype!=\"\"} / node_filesystem_size_bytes{job=\"node-exporter\",fstype!=\"\"} * 100 < 3\nand\n  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\"} == 0\n)\n"
      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.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefilesystemfilesfillingup
        summary: Filesystem is predicted to run out of inodes within the next 24 hours.
      expr: "(\n  node_filesystem_files_free{job=\"node-exporter\",fstype!=\"\"} / node_filesystem_files{job=\"node-exporter\",fstype!=\"\"} * 100 < 40\nand\n  predict_linear(node_filesystem_files_free{job=\"node-exporter\",fstype!=\"\"}[6h], 24*60*60) < 0\nand\n  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\"} == 0\n)\n"
      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.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefilesystemfilesfillingup
        summary: Filesystem is predicted to run out of inodes within the next 4 hours.
      expr: "(\n  node_filesystem_files_free{job=\"node-exporter\",fstype!=\"\"} / node_filesystem_files{job=\"node-exporter\",fstype!=\"\"} * 100 < 20\nand\n  predict_linear(node_filesystem_files_free{job=\"node-exporter\",fstype!=\"\"}[6h], 4*60*60) < 0\nand\n  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\"} == 0\n)\n"
      for: 1h
      labels:
        severity: critical
    - alert: NodeFilesystemAlmostOutOfFiles
      annotations:
        description: Filesystem on {{`{{`}} $labels.device {{`}}`}} at {{`{{`}} $labels.instance {{`}}`}} has only {{`{{`}} printf "%.2f" $value {{`}}`}}% available inodes left.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefilesystemalmostoutoffiles
        summary: Filesystem has less than 5% inodes left.
      expr: "(\n  node_filesystem_files_free{job=\"node-exporter\",fstype!=\"\"} / node_filesystem_files{job=\"node-exporter\",fstype!=\"\"} * 100 < 5\nand\n  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\"} == 0\n)\n"
      for: 1h
      labels:
        severity: warning
    - alert: NodeFilesystemAlmostOutOfFiles
      annotations:
        description: Filesystem on {{`{{`}} $labels.device {{`}}`}} at {{`{{`}} $labels.instance {{`}}`}} has only {{`{{`}} printf "%.2f" $value {{`}}`}}% available inodes left.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefilesystemalmostoutoffiles
        summary: Filesystem has less than 3% inodes left.
      expr: "(\n  node_filesystem_files_free{job=\"node-exporter\",fstype!=\"\"} / node_filesystem_files{job=\"node-exporter\",fstype!=\"\"} * 100 < 3\nand\n  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\"} == 0\n)\n"
      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.'
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodenetworkreceiveerrs
        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.'
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodenetworktransmiterrs
        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.'
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodehighnumberconntrackentriesused
        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.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodetextfilecollectorscrapeerror
        summary: Node Exporter text file collector failed to scrape.
      expr: 'node_textfile_scrape_error{job="node-exporter"} == 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.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodeclockskewdetected
        summary: Clock skew detected.
      expr: "(\n  node_timex_offset_seconds > 0.05\nand\n  deriv(node_timex_offset_seconds[5m]) >= 0\n)\nor\n(\n  node_timex_offset_seconds < -0.05\nand\n  deriv(node_timex_offset_seconds[5m]) <= 0\n)\n"
      for: 10m
      labels:
        severity: warning
    - alert: NodeClockNotSynchronising
      annotations:
        description: Clock on {{`{{`}} $labels.instance {{`}}`}} is not synchronising. Ensure NTP is configured on this host.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodeclocknotsynchronising
        summary: Clock not synchronising.
      expr: 'min_over_time(node_timex_sync_status[5m]) == 0

        and

        node_timex_maxerror_seconds >= 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.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/noderaiddegraded
        summary: RAID Array is degraded
      expr: 'node_md_disks_required - ignoring (state) (node_md_disks{state="active"}) > 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.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/noderaiddiskfailure
        summary: Failed device in RAID array
      expr: 'node_md_disks{state="failed"} > 0

        '
      labels:
        severity: warning
    - alert: NodeFileDescriptorLimit
      annotations:
        description: File descriptors limit at {{`{{`}} $labels.instance {{`}}`}} is currently at {{`{{`}} printf "%.2f" $value {{`}}`}}%.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefiledescriptorlimit
        summary: Kernel is predicted to exhaust file descriptors limit soon.
      expr: "(\n  node_filefd_allocated{job=\"node-exporter\"} * 100 / node_filefd_maximum{job=\"node-exporter\"} > 70\n)\n"
      for: 15m
      labels:
        severity: warning
    - alert: NodeFileDescriptorLimit
      annotations:
        description: File descriptors limit at {{`{{`}} $labels.instance {{`}}`}} is currently at {{`{{`}} printf "%.2f" $value {{`}}`}}%.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefiledescriptorlimit
        summary: Kernel is predicted to exhaust file descriptors limit soon.
      expr: "(\n  node_filefd_allocated{job=\"node-exporter\"} * 100 / node_filefd_maximum{job=\"node-exporter\"} > 90\n)\n"
      for: 15m
      labels:
        severity: critical
  - name: node-exporter.rules
    rules:
    - expr: "count without (cpu, mode) (\n  node_cpu_seconds_total{job=\"node-exporter\",mode=\"idle\"}\n)\n"
      record: instance:node_num_cpu:sum
    - expr: "1 - avg without (cpu) (\n  sum without (mode) (rate(node_cpu_seconds_total{job=\"node-exporter\", mode=~\"idle|iowait|steal\"}[5m]))\n)\n"
      record: instance:node_cpu_utilisation:rate5m
    - expr: "(\n  node_load1{job=\"node-exporter\"}\n/\n  instance:node_num_cpu:sum{job=\"node-exporter\"}\n)\n"
      record: instance:node_load1_per_cpu:ratio
    - expr: "1 - (\n  (\n    node_memory_MemAvailable_bytes{job=\"node-exporter\"}\n    or\n    (\n      node_memory_Buffers_bytes{job=\"node-exporter\"}\n      +\n      node_memory_Cached_bytes{job=\"node-exporter\"}\n      +\n      node_memory_MemFree_bytes{job=\"node-exporter\"}\n      +\n      node_memory_Slab_bytes{job=\"node-exporter\"}\n    )\n  )\n/\n  node_memory_MemTotal_bytes{job=\"node-exporter\"}\n)\n"
      record: instance:node_memory_utilisation:ratio
    - expr: 'rate(node_vmstat_pgmajfault{job="node-exporter"}[5m])

        '
      record: instance:node_vmstat_pgmajfault:rate5m
    - expr: 'rate(node_disk_io_time_seconds_total{job="node-exporter", device=~"mmcblk.p.+|nvme.+|rbd.+|sd.+|vd.+|xvd.+|dm-.+|dasd.+"}[5m])

        '
      record: instance_device:node_disk_io_time_seconds:rate5m
    - expr: 'rate(node_disk_io_time_weighted_seconds_total{job="node-exporter", device=~"mmcblk.p.+|nvme.+|rbd.+|sd.+|vd.+|xvd.+|dm-.+|dasd.+"}[5m])

        '
      record: instance_device:node_disk_io_time_weighted_seconds:rate5m
    - expr: "sum without (device) (\n  rate(node_network_receive_bytes_total{job=\"node-exporter\", device!=\"lo\"}[5m])\n)\n"
      record: instance:node_network_receive_bytes_excluding_lo:rate5m
    - expr: "sum without (device) (\n  rate(node_network_transmit_bytes_total{job=\"node-exporter\", device!=\"lo\"}[5m])\n)\n"
      record: instance:node_network_transmit_bytes_excluding_lo:rate5m
    - expr: "sum without (device) (\n  rate(node_network_receive_drop_total{job=\"node-exporter\", device!=\"lo\"}[5m])\n)\n"
      record: instance:node_network_receive_drop_excluding_lo:rate5m
    - expr: "sum without (device) (\n  rate(node_network_transmit_drop_total{job=\"node-exporter\", device!=\"lo\"}[5m])\n)\n"
      record: instance:node_network_transmit_drop_excluding_lo:rate5m