apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  labels:
    app.kubernetes.io/component: exporter
    app.kubernetes.io/name: node-exporter
    app.kubernetes.io/part-of: kube-prometheus
    app.kubernetes.io/version: 1.6.1
    prometheus: k8s
    role: alert-rules
  name: node-exporter-rules
  namespace: monitoring
  annotations:
    argocd.argoproj.io/sync-wave: '1'
spec:
  groups:
    - name: node-exporter
      rules:
        - alert: NodeFilesystemSpaceFillingUp
          annotations:
            description: Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint
              }}, 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!=\"\
            \",mountpoint!=\"\"} / node_filesystem_size_bytes{job=\"node-exporter\"\
            ,fstype!=\"\",mountpoint!=\"\"} * 100 < 15\nand\n  predict_linear(node_filesystem_avail_bytes{job=\"\
            node-exporter\",fstype!=\"\",mountpoint!=\"\"}[6h], 24*60*60) < 0\nand\n\
            \  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\",mountpoint!=\"\
            \"} == 0\n)\n"
          for: 1h
          labels:
            severity: warning
        - alert: NodeFilesystemSpaceFillingUp
          annotations:
            description: Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint
              }}, 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!=\"\
            \",mountpoint!=\"\"} / node_filesystem_size_bytes{job=\"node-exporter\"\
            ,fstype!=\"\",mountpoint!=\"\"} * 100 < 10\nand\n  predict_linear(node_filesystem_avail_bytes{job=\"\
            node-exporter\",fstype!=\"\",mountpoint!=\"\"}[6h], 4*60*60) < 0\nand\n\
            \  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\",mountpoint!=\"\
            \"} == 0\n)\n"
          for: 1h
          labels:
            severity: critical
        - alert: NodeFilesystemAlmostOutOfSpace
          annotations:
            description: Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint
              }}, 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!=\"\
            \",mountpoint!=\"\"} / node_filesystem_size_bytes{job=\"node-exporter\"\
            ,fstype!=\"\",mountpoint!=\"\"} * 100 < 5\nand\n  node_filesystem_readonly{job=\"\
            node-exporter\",fstype!=\"\",mountpoint!=\"\"} == 0\n)\n"
          for: 30m
          labels:
            severity: warning
        - alert: NodeFilesystemAlmostOutOfSpace
          annotations:
            description: Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint
              }}, 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!=\"\
            \",mountpoint!=\"\"} / node_filesystem_size_bytes{job=\"node-exporter\"\
            ,fstype!=\"\",mountpoint!=\"\"} * 100 < 3\nand\n  node_filesystem_readonly{job=\"\
            node-exporter\",fstype!=\"\",mountpoint!=\"\"} == 0\n)\n"
          for: 30m
          labels:
            severity: critical
        - alert: NodeFilesystemFilesFillingUp
          annotations:
            description: Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint
              }}, 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!=\"\"\
            ,mountpoint!=\"\"} / node_filesystem_files{job=\"node-exporter\",fstype!=\"\
            \",mountpoint!=\"\"} * 100 < 40\nand\n  predict_linear(node_filesystem_files_free{job=\"\
            node-exporter\",fstype!=\"\",mountpoint!=\"\"}[6h], 24*60*60) < 0\nand\n\
            \  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\",mountpoint!=\"\
            \"} == 0\n)\n"
          for: 1h
          labels:
            severity: warning
        - alert: NodeFilesystemFilesFillingUp
          annotations:
            description: Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint
              }}, 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!=\"\"\
            ,mountpoint!=\"\"} / node_filesystem_files{job=\"node-exporter\",fstype!=\"\
            \",mountpoint!=\"\"} * 100 < 20\nand\n  predict_linear(node_filesystem_files_free{job=\"\
            node-exporter\",fstype!=\"\",mountpoint!=\"\"}[6h], 4*60*60) < 0\nand\n\
            \  node_filesystem_readonly{job=\"node-exporter\",fstype!=\"\",mountpoint!=\"\
            \"} == 0\n)\n"
          for: 1h
          labels:
            severity: critical
        - alert: NodeFilesystemAlmostOutOfFiles
          annotations:
            description: Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint
              }}, 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!=\"\"\
            ,mountpoint!=\"\"} / node_filesystem_files{job=\"node-exporter\",fstype!=\"\
            \",mountpoint!=\"\"} * 100 < 5\nand\n  node_filesystem_readonly{job=\"\
            node-exporter\",fstype!=\"\",mountpoint!=\"\"} == 0\n)\n"
          for: 1h
          labels:
            severity: warning
        - alert: NodeFilesystemAlmostOutOfFiles
          annotations:
            description: Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint
              }}, 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!=\"\"\
            ,mountpoint!=\"\"} / node_filesystem_files{job=\"node-exporter\",fstype!=\"\
            \",mountpoint!=\"\"} * 100 < 3\nand\n  node_filesystem_readonly{job=\"\
            node-exporter\",fstype!=\"\",mountpoint!=\"\"} == 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{job="node-exporter"}[2m]) /
            rate(node_network_receive_packets_total{job="node-exporter"}[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{job="node-exporter"}[2m]) /
            rate(node_network_transmit_packets_total{job="node-exporter"}[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{job="node-exporter"} / node_nf_conntrack_entries_limit)
            > 0.75

            '
          labels:
            severity: warning
        - alert: NodeTextFileCollectorScrapeError
          annotations:
            description: Node Exporter text file collector on {{ $labels.instance
              }} 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 at {{ $labels.instance }} is out of sync by more than
              0.05s. 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{job=\"node-exporter\"} > 0.05\nand\n\
            \  deriv(node_timex_offset_seconds{job=\"node-exporter\"}[5m]) >= 0\n\
            )\nor\n(\n  node_timex_offset_seconds{job=\"node-exporter\"} < -0.05\n\
            and\n  deriv(node_timex_offset_seconds{job=\"node-exporter\"}[5m]) <=\
            \ 0\n)\n"
          for: 10m
          labels:
            severity: warning
        - alert: NodeClockNotSynchronising
          annotations:
            description: Clock at {{ $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{job="node-exporter"}[5m]) ==
            0

            and

            node_timex_maxerror_seconds{job="node-exporter"} >= 16

            '
          for: 10m
          labels:
            severity: warning
        - alert: NodeRAIDDegraded
          annotations:
            description: RAID array '{{ $labels.device }}' at {{ $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{job="node-exporter",device=~"(/dev/)?(mmcblk.p.+|nvme.+|rbd.+|sd.+|vd.+|xvd.+|dm-.+|md.+|dasd.+)"}
            - ignoring (state) (node_md_disks{state="active",job="node-exporter",device=~"(/dev/)?(mmcblk.p.+|nvme.+|rbd.+|sd.+|vd.+|xvd.+|dm-.+|md.+|dasd.+)"})
            > 0

            '
          for: 15m
          labels:
            severity: critical
        - alert: NodeRAIDDiskFailure
          annotations:
            description: At least one device in RAID array at {{ $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",job="node-exporter",device=~"(/dev/)?(mmcblk.p.+|nvme.+|rbd.+|sd.+|vd.+|xvd.+|dm-.+|md.+|dasd.+)"}
            > 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
        - alert: NodeCPUHighUsage
          annotations:
            description: 'CPU usage at {{ $labels.instance }} has been above 90% for
              the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.

              '
            runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodecpuhighusage
            summary: High CPU usage.
          expr: 'sum without(mode) (avg without (cpu) (rate(node_cpu_seconds_total{job="node-exporter",
            mode!="idle"}[2m]))) * 100 > 90

            '
          for: 15m
          labels:
            severity: info
        - alert: NodeSystemSaturation
          annotations:
            description: 'System load per core at {{ $labels.instance }} has been
              above 2 for the last 15 minutes, is currently at {{ printf "%.2f" $value
              }}.

              This might indicate this instance resources saturation and can cause
              it becoming unresponsive.

              '
            runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodesystemsaturation
            summary: System saturated, load per core is very high.
          expr: 'node_load1{job="node-exporter"}

            / count without (cpu, mode) (node_cpu_seconds_total{job="node-exporter",
            mode="idle"}) > 2

            '
          for: 15m
          labels:
            severity: warning
        - alert: NodeMemoryMajorPagesFaults
          annotations:
            description: 'Memory major pages are occurring at very high rate at {{
              $labels.instance }}, 500 major page faults per second for the last 15
              minutes, is currently at {{ printf "%.2f" $value }}.

              Please check that there is enough memory available at this instance.

              '
            runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodememorymajorpagesfaults
            summary: Memory major page faults are occurring at very high rate.
          expr: 'rate(node_vmstat_pgmajfault{job="node-exporter"}[5m]) > 500

            '
          for: 15m
          labels:
            severity: warning
        - alert: NodeMemoryHighUtilization
          annotations:
            description: 'Memory is filling up at {{ $labels.instance }}, has been
              above 90% for the last 15 minutes, is currently at {{ printf "%.2f"
              $value }}%.

              '
            runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodememoryhighutilization
            summary: Host is running out of memory.
          expr: '100 - (node_memory_MemAvailable_bytes{job="node-exporter"} / node_memory_MemTotal_bytes{job="node-exporter"}
            * 100) > 90

            '
          for: 15m
          labels:
            severity: warning
        - alert: NodeDiskIOSaturation
          annotations:
            description: 'Disk IO queue (aqu-sq) is high on {{ $labels.device }} at
              {{ $labels.instance }}, has been above 10 for the last 15 minutes, is
              currently at {{ printf "%.2f" $value }}.

              This symptom might indicate disk saturation.

              '
            runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodediskiosaturation
            summary: Disk IO queue is high.
          expr: 'rate(node_disk_io_time_weighted_seconds_total{job="node-exporter",
            device=~"(/dev/)?(mmcblk.p.+|nvme.+|rbd.+|sd.+|vd.+|xvd.+|dm-.+|md.+|dasd.+)"}[5m])
            > 10

            '
          for: 30m
          labels:
            severity: warning
        - alert: NodeSystemdServiceFailed
          annotations:
            description: Systemd service {{ $labels.name }} has entered failed state
              at {{ $labels.instance }}
            runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodesystemdservicefailed
            summary: Systemd service has entered failed state.
          expr: 'node_systemd_unit_state{job="node-exporter", state="failed"} == 1

            '
          for: 5m
          labels:
            severity: warning
        - alert: NodeBondingDegraded
          annotations:
            description: Bonding interface {{ $labels.master }} on {{ $labels.instance
              }} is in degraded state due to one or more slave failures.
            runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodebondingdegraded
            summary: Bonding interface is degraded
          expr: '(node_bonding_slaves - node_bonding_active) != 0

            '
          for: 5m
          labels:
            severity: warning
    - 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=~"(/dev/)?(mmcblk.p.+|nvme.+|rbd.+|sd.+|vd.+|xvd.+|dm-.+|md.+|dasd.+)"}[5m])

            '
          record: instance_device:node_disk_io_time_seconds:rate5m
        - expr: 'rate(node_disk_io_time_weighted_seconds_total{job="node-exporter",
            device=~"(/dev/)?(mmcblk.p.+|nvme.+|rbd.+|sd.+|vd.+|xvd.+|dm-.+|md.+|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