kube/monitoring/node-exporter.yaml

---
apiVersion: monitoring.coreos.com/v1
kind: Probe
metadata:
  name: nodes-proxmox
spec:
  scrapeTimeout: 30s
  targets:
    staticConfig:
      static:
        - nas.mgmt.k-space.ee:9100
        - pve1.proxmox.infra.k-space.ee:9100
        - pve2.proxmox.infra.k-space.ee:9100
        - pve8.proxmox.infra.k-space.ee:9100
        - pve9.proxmox.infra.k-space.ee:9100
      relabelingConfigs:
        - sourceLabels: [__param_target]
          targetLabel: instance
        - sourceLabels: [__param_target]
          targetLabel: __address__
  prober:
    url: localhost
    path: /metrics
  metricRelabelings:
    - sourceLabels: [__address__]
      targetLabel: target
---
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: node-exporter
spec:
  groups:
    - name: node-exporter
      rules:
        - alert: ZfsOfflinePool
          expr: node_zfs_zpool_state{state!="online"} > 0
          for: 1m
          labels:
            severity: critical
          annotations:
            summary: ZFS offline pool (instance {{ $labels.instance }})
            description: "A ZFS zpool is in a unexpected state: {{ $labels.state }}.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
        - alert: HostHighLoad
          expr: sum(node_load1{}) by (instance) / count(node_cpu_seconds_total{mode="user"}) by (instance) > 2.5
          for: 15m
          labels:
            severity: warning
          annotations:
            summary: Host under high load
            description: Many processes are queued up for execution
        - alert: HostOutOfMemory
          expr: (node_memory_Cached_bytes + node_memory_Buffers_bytes + node_memory_MemFree_bytes ) / node_memory_MemTotal_bytes * 100 < 20
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host out of memory (instance {{ $labels.instance }})
            description: Node memory is filling up (< 10% left)
        - alert: HostMemoryUnderMemoryPressure
          expr: rate(node_vmstat_pgmajfault[1m]) > 1000
          for: 2m
          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
        - alert: HostUnusualNetworkThroughputIn
          expr: sum by (instance) (rate(node_network_receive_bytes_total[2m])) > 800e+06
          for: 1h
          labels:
            severity: warning
          annotations:
            summary: Host unusual network throughput in (instance {{ $labels.instance }})
            description: Host network interfaces are probably receiving too much data (> 800 MB/s)
        - alert: HostUnusualNetworkThroughputOut
          expr: sum by (instance) (rate(node_network_transmit_bytes_total[2m])) > 800e+06
          for: 1h
          labels:
            severity: warning
          annotations:
            summary: Host unusual network throughput out (instance {{ $labels.instance }})
            description: Host network interfaces are probably sending too much data (> 800 MB/s)
        - alert: HostUnusualDiskReadRate
          expr: sum by (instance) (rate(node_disk_read_bytes_total[2m])) > 500e+06
          for: 1h
          labels:
            severity: warning
          annotations:
            summary: Host unusual disk read rate (instance {{ $labels.instance }})
            description: Disk is probably reading too much data (> 500 MB/s)
        - alert: HostUnusualDiskWriteRate
          expr: sum by (instance) (rate(node_disk_written_bytes_total[2m])) > 500e+06
          for: 1h
          labels:
            severity: warning
          annotations:
            summary: Host unusual disk write rate (instance {{ $labels.instance }})
            description: Disk is probably writing too much data (> 500 MB/s)
        # Please add ignored mountpoints in node_exporter parameters like
        # "--collector.filesystem.ignored-mount-points=^/(sys|proc|dev|run)($|/)".
        # Same rule using "node_filesystem_free_bytes" will fire when disk fills for non-root users.
        - alert: HostOutOfDiskSpace
          expr: (node_filesystem_avail_bytes * 100) / node_filesystem_size_bytes < 10 and ON (instance, device, mountpoint) node_filesystem_readonly == 0
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host out of disk space (instance {{ $labels.instance }})
            description: Disk is almost full (< 10% left)
        # Please add ignored mountpoints in node_exporter parameters like
        # "--collector.filesystem.ignored-mount-points=^/(sys|proc|dev|run)($|/)".
        # Same rule using "node_filesystem_free_bytes" will fire when disk fills for non-root users.
        - alert: HostDiskWillFillIn24Hours
          expr: (node_filesystem_avail_bytes * 100) / node_filesystem_size_bytes < 10 and ON (instance, device, mountpoint) predict_linear(node_filesystem_avail_bytes{fstype!~"tmpfs"}[1h], 24 * 3600) < 0 and ON (instance, device, mountpoint) node_filesystem_readonly == 0
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host disk will fill in 24 hours (instance {{ $labels.instance }})
            description: Filesystem is predicted to run out of space within the next 24 hours at current write rate
        - alert: HostOutOfInodes
          expr: node_filesystem_files_free{mountpoint ="/rootfs"} / node_filesystem_files{mountpoint="/rootfs"} * 100 < 10 and ON (instance, device, mountpoint) node_filesystem_readonly{mountpoint="/rootfs"} == 0
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host out of inodes (instance {{ $labels.instance }})
            description: Disk is almost running out of available inodes (< 10% left)
        - alert: HostInodesWillFillIn24Hours
          expr: node_filesystem_files_free{mountpoint ="/rootfs"} / node_filesystem_files{mountpoint="/rootfs"} * 100 < 10 and predict_linear(node_filesystem_files_free{mountpoint="/rootfs"}[1h], 24 * 3600) < 0 and ON (instance, device, mountpoint) node_filesystem_readonly{mountpoint="/rootfs"} == 0
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host inodes will fill in 24 hours (instance {{ $labels.instance }})
            description: Filesystem is predicted to run out of inodes within the next 24 hours at current write rate
        - alert: HostUnusualDiskReadLatency
          expr: rate(node_disk_read_time_seconds_total[1m]) / rate(node_disk_reads_completed_total[1m]) > 0.1 and rate(node_disk_reads_completed_total[1m]) > 0
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host unusual disk read latency (instance {{ $labels.instance }})
            description: Disk latency is growing (read operations > 100ms)
        - alert: HostUnusualDiskWriteLatency
          expr: rate(node_disk_write_time_seconds_total[1m]) / rate(node_disk_writes_completed_total[1m]) > 0.1 and rate(node_disk_writes_completed_total[1m]) > 0
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host unusual disk write latency (instance {{ $labels.instance }})
            description: Disk latency is growing (write operations > 100ms)
        - alert: HostCpuStealNoisyNeighbor
          expr: avg by(instance) (rate(node_cpu_seconds_total{mode="steal"}[5m])) * 100 > 10
          for: 0m
          labels:
            severity: warning
          annotations:
            summary: Host CPU steal noisy neighbor (instance {{ $labels.instance }})
            description: CPU steal is > 10%. A noisy neighbor is killing VM performances or a spot instance may be out of credit.
        # 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"})) > 50000
          for: 0m
          labels:
            severity: warning
          annotations:
            summary: Host context switching (instance {{ $labels.instance }})
            description: Context switching is growing on node (> 50000 / s)
        - alert: HostSwapIsEnabled
          expr: node_memory_SwapTotal_bytes > 0
          for: 0m
          labels:
            severity: warning
          annotations:
            summary: Swap is discouraged nowadays
        - 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
        - alert: HostNodeOvertemperatureAlarm
          expr: node_hwmon_temp_alarm == 1
          for: 0m
          labels:
            severity: critical
          annotations:
            summary: Host node overtemperature alarm (instance {{ $labels.instance }})
            description: Physical node temperature alarm triggered
        - alert: HostRaidArrayGotInactive
          expr: node_md_state{state="inactive"} > 0
          for: 0m
          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.
        - 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
        - alert: HostOomKillDetected
          expr: increase(node_vmstat_oom_kill[1m]) > 0
          for: 0m
          labels:
            severity: warning
          annotations:
            summary: Host OOM kill detected (instance {{ $labels.instance }})
            description: OOM kill detected
        - alert: HostEdacCorrectableErrorsDetected
          expr: increase(node_edac_correctable_errors_total[1m]) > 0
          for: 0m
          labels:
            severity: info
          annotations:
            summary: Host EDAC Correctable Errors detected (instance {{ $labels.instance }})
            description: "Host {{ $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: 0m
          labels:
            severity: warning
          annotations:
            summary: Host EDAC Uncorrectable Errors detected (instance {{ $labels.instance }})
            description: "Host {{ $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: rate(node_network_receive_errs_total[2m]) / rate(node_network_receive_packets_total[2m]) > 0.01
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host Network Receive Errors (instance {{ $labels.instance }})
            description: "Host {{ $labels.instance }} interface {{ $labels.device }} has encountered {{ printf \"%.0f\" $value }} receive errors in the last two minutes.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
        - alert: HostNetworkTransmitErrors
          expr: rate(node_network_transmit_errs_total[2m]) / rate(node_network_transmit_packets_total[2m]) > 0.01
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host Network Transmit Errors (instance {{ $labels.instance }})
            description: "Host {{ $labels.instance }} interface {{ $labels.device }} has encountered {{ printf \"%.0f\" $value }} transmit errors in the last two minutes.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
        - alert: HostNetworkInterfaceSaturated
          expr: (rate(node_network_receive_bytes_total{device!~"^tap.*"}[1m]) + rate(node_network_transmit_bytes_total{device!~"^tap.*"}[1m])) / node_network_speed_bytes{device!~"^tap.*"} > 0.8
          for: 1m
          labels:
            severity: warning
          annotations:
            summary: Host Network Interface Saturated (instance {{ $labels.instance }})
            description: "The network interface {{ $labels.interface }} on {{ $labels.instance }} is getting overloaded."
        - alert: HostNetworkBondDegraded
          expr: node_bonding_active != node_bonding_slaves {master=~"bond.*"}
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host Network Bond Degraded
        - alert: HostConntrackLimit
          expr: node_nf_conntrack_entries / node_nf_conntrack_entries_limit > 0.8
          for: 5m
          labels:
            severity: warning
          annotations:
            summary: Host conntrack limit (instance {{ $labels.instance }})
            description: The number of conntrack is approching limit
        - 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.
        - alert: HostClockNotSynchronising
          expr: min_over_time(node_timex_sync_status[1m]) == 0 and node_timex_maxerror_seconds >= 16
          for: 2m
          labels:
            severity: warning
          annotations:
            summary: Host clock not synchronising (instance {{ $labels.instance }})
            description: Clock not synchronising.
---
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: smart
spec:
  groups:
    - name: smart
      rules:
        - alert: SmartSSDWriteRateTooHigh
          expr: rate(smartmon_total_lbas_written_raw_value[72h]) * 512 > 10000000
          for: 5m
          labels:
            severity: warning
          annotations:
            summary: SSD write rate exceeds 10MB/s
            description: At this rate the SSD will be worn out before warranty period expires
---
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: temperatures
spec:
  groups:
    - name: temperatures
      rules:
        - alert: HighDiskTemperature
          expr: smartmon_airflow_temperature_cel_raw_value > 45 or smartmon_temperature_celsius_raw_value > 45
          for: 10m
          labels:
            severity: critical
          annotations:
            summary: High HDD/SSD temperature indicates high ambient temperature
        - alert: HighChipsetTemperature
          expr: node_hwmon_temp_celsius > 65
          for: 10m
          labels:
            severity: warning
          annotations:
            summary: High chipset (CPU, NB) temperature indicates insufficient or failing fans
        - alert: LowDiskTemperature
          expr: smartmon_airflow_temperature_cel_raw_value < 10 or smartmon_temperature_celsius_raw_value < 10
          for: 10m
          labels:
            severity: critical
          annotations:
            summary: Low HDD/SSD temperature indicates low ambient temperature and stuck server room exhaust fan relay
---
apiVersion: monitoring.coreos.com/v1
kind: PodMonitor
metadata:
  name: node-exporter
spec:

  selector:
    matchLabels:
      app: node-exporter
  podMetricsEndpoints:
    - port: web
      scrapeTimeout: 30s
      relabelings:
        - sourceLabels: [__meta_kubernetes_pod_node_name]
          targetLabel: node
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: node-exporter
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  labels:
    app: node-exporter
  name: node-exporter
  annotations:
    keel.sh/policy: force
    keel.sh/trigger: poll
    keel.sh/pollSchedule: "@midnight"
spec:
  selector:
    matchLabels:
      app: node-exporter
  template:
    metadata:
      labels:
        app: node-exporter
    spec:
      containers:
        - name: node-exporter
          args:
            - --web.listen-address=0.0.0.0:9101
            - --path.sysfs=/host/sys
            - --path.rootfs=/host/root
            - --no-collector.wifi
            - --collector.filesystem.mount-points-exclude=^/(dev|proc|sys|var/lib/docker/.+|var/lib/kubelet/pods/.+)($|/)
            - --collector.netclass.ignored-devices=^(veth|cali|vxlan|cni|vnet|tap|lo|wg)
            - --collector.netdev.device-exclude=^(veth|cali|vxlan|cni|vnet|tap|lo|wg)
            - --collector.diskstats.ignored-devices=^(sr[0-9][0-9]*)$
          image: prom/node-exporter:v1.5.0
          resources:
            limits:
              cpu: 50m
              memory: 180Mi
            requests:
              cpu: 5m
              memory: 20Mi
          volumeMounts:
            - mountPath: /host/sys
              mountPropagation: HostToContainer
              name: sys
              readOnly: true
            - mountPath: /host/root
              mountPropagation: HostToContainer
              name: root
              readOnly: true
          ports:
            - containerPort: 9101
              name: web
          securityContext:
            runAsGroup: 65532
            runAsNonRoot: true
            runAsUser: 65532
            readOnlyRootFilesystem: true
      hostNetwork: true
      hostPID: true
      priorityClassName: system-node-critical
      securityContext:
        runAsNonRoot: true
        runAsUser: 65534
      serviceAccountName: node-exporter
      tolerations:
        - operator: Exists
      volumes:
        - hostPath:
            path: /sys
          name: sys
        - hostPath:
            path: /
          name: root