groups: - name: hosts rules: - alert: HostOutOfMemory expr: node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes * 100 < 10 for: 2m labels: severity: warning annotations: summary: Host out of memory (instance {{ $labels.instance }}) description: "Node memory is filling up (< 10% left)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - 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\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - alert: HostUnusualNetworkThroughputIn expr: sum by (instance) (rate(node_network_receive_bytes_total[2m])) / 1024 / 1024 > 100 for: 5m labels: severity: warning annotations: 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: HostUnusualNetworkThroughputOut expr: sum by (instance) (rate(node_network_transmit_bytes_total[2m])) / 1024 / 1024 > 100 for: 5m labels: severity: warning annotations: 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: HostUnusualDiskReadRate # expr: sum by (instance) (rate(node_disk_read_bytes_total[2m])) / 1024 / 1024 > 100 # for: 5m # labels: # severity: warning # annotations: # 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: HostUnusualDiskWriteRate # expr: sum by (instance) (rate(node_disk_written_bytes_total[2m])) / 1024 / 1024 > 50 # for: 2m # labels: # severity: warning # annotations: # 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 = {{ $labels }}" # Please add ignored mountpoints in node_exporter parameters like # "--collector.filesystem.ignored-mount-points=^/(sys|proc|dev|run)($|/)". # 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)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" # Please add ignored mountpoints in node_exporter parameters like # "--collector.filesystem.ignored-mount-points=^/(sys|proc|dev|run)($|/)". # 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\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - 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)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - 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\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" # - 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)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" # # - alert: HostUnusualDiskWriteLatency # expr: rate(node_disk_write_time_seconds_total[1m]) / rate(node_disk_writes_completed_total[1m]) > 2 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)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - alert: HostHighCpuLoad expr: 100 - (avg by(instance) (rate(node_cpu_seconds_total{mode="idle"}[2m])) * 100) > 90 for: 0m labels: severity: warning annotations: summary: Host high CPU load (instance {{ $labels.instance }}) description: "CPU load is > 90%\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - 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.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" # 10000 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"})) > 10000 for: 0m 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: 2m labels: severity: warning annotations: summary: Host swap is filling up (instance {{ $labels.instance }}) description: "Swap is filling up (>80%)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - alert: HostSystemdServiceCrashed expr: node_systemd_unit_state{state="failed"} == 1 for: 0m labels: severity: warning annotations: summary: Host systemd service crashed (instance {{ $labels.instance }}) description: "systemd service crashed: {{ $labels.name }} on {{ $labels.job }}" - 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_crit_alarm_celsius == 1 for: 0m 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: 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.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - 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\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)) > 2 for: 6h 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[1m]) > 0 for: 0m 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[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 five 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 five 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.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - 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\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - 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.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - 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.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" # 26 hours since last backup - alert: NoRecentBackup expr: (time()*1000 - borgbackup_last_backup) > (1000 * 60 * 60 * 26) for: 2m labels: severity: warning annotations: summary: No backup in the last 26 hours (instance {{ $labels.exported_job }}) description: "to repository {{ $labels.repo }}"