From 673b30eeb21c510be8c2ac699db1283c19a4f86e Mon Sep 17 00:00:00 2001 From: Kazuhiro MUSASHI Date: Sun, 27 Sep 2020 13:01:34 +0900 Subject: [PATCH] Modify `Prometheus` alert settings. --- .../etc/prometheus.d/alerts/node_exporter.yml | 188 ++++++++++++++---- 1 file changed, 150 insertions(+), 38 deletions(-) diff --git a/cookbooks/prometheus/files/etc/prometheus.d/alerts/node_exporter.yml b/cookbooks/prometheus/files/etc/prometheus.d/alerts/node_exporter.yml index 6ed118b..be8fdad 100644 --- a/cookbooks/prometheus/files/etc/prometheus.d/alerts/node_exporter.yml +++ b/cookbooks/prometheus/files/etc/prometheus.d/alerts/node_exporter.yml @@ -1,119 +1,231 @@ groups: - name: Node rules: - - alert: OutOfMemory + - alert: HostOutOfMemory expr: node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes * 100 < 10 for: 5m labels: severity: warning annotations: - summary: "Out of memory (instance {{ $labels.instance }})" + summary: "Host out of memory (instance {{ $labels.instance }})" description: "Node memory is filling up (< 10% left)\n VALUE = {{ $value }}\n LABELS: {{ $labels }}" - - alert: UnusualNetworkThroughputIn + - alert: HostMemoryUnderMemoryPressure + expr: rate(node_vmstat_pgmajfault[1m]) > 1000 + for: 5m + 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) (irate(node_network_receive_bytes_total[2m])) / 1024 / 1024 > 100 for: 5m labels: severity: warning annotations: - summary: "Unusual network throughput in (instance {{ $labels.instance }})" + 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: UnusualNetworkThroughputOut + - alert: HostUnusualNetworkThroughputOut expr: sum by (instance) (irate(node_network_transmit_bytes_total[2m])) / 1024 / 1024 > 100 for: 5m labels: severity: warning annotations: - summary: "Unusual network throughput out (instance {{ $labels.instance }})" + 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: UnusualDiskReadRate + - alert: HostUnusualDiskReadRate expr: sum by (instance) (irate(node_disk_read_bytes_total[2m])) / 1024 / 1024 > 50 for: 5m labels: severity: warning annotations: - summary: "Unusual disk read rate (instance {{ $labels.instance }})" + 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: UnusualDiskWriteRate + - alert: HostUnusualDiskWriteRate expr: sum by (instance) (irate(node_disk_written_bytes_total[2m])) / 1024 / 1024 > 50 for: 5m labels: severity: warning annotations: - summary: "Unusual disk write rate (instance {{ $labels.instance }})" + 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 }}" - - alert: OutOfDiskSpace - expr: node_filesystem_free_bytes{mountpoint ="/"} / node_filesystem_size_bytes{mountpoint ="/"} * 100 < 10 + - alert: HostOutOfDiskSpace + expr: (node_filesystem_avail_bytes{mountpoint="/rootfs"} * 100) / node_filesystem_size_bytes{mountpoint="/rootfs"} < 10 for: 5m labels: severity: warning annotations: - summary: "Out of disk space (instance {{ $labels.instance }})" + summary: "Host out of disk space (instance {{ $labels.instance }})" description: "Disk is almost full (< 10% left)\n VALUE = {{ $value }}\n LABELS: {{ $labels }}" - - alert: OutOfInodes - expr: node_filesystem_files_free{mountpoint ="/"} / node_filesystem_files{mountpoint ="/"} * 100 < 10 + - alert: HostDiskWillFillIn4Hours + expr: predict_linear(node_filesystem_free_bytes{fstype!~"tmpfs"}[1h], 4 * 3600) < 0 for: 5m labels: severity: warning annotations: - summary: "Out of inodes (instance {{ $labels.instance }})" + summary: "Host disk will fill in 4 hours (instance {{ $labels.instance }})" + description: "Disk will fill in 4 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 + for: 5m + 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: UnusualDiskReadLatency + - alert: HostUnusualDiskReadLatency expr: rate(node_disk_read_time_seconds_total[1m]) / rate(node_disk_reads_completed_total[1m]) > 100 for: 5m labels: severity: warning annotations: - summary: "Unusual disk read latency (instance {{ $labels.instance }})" + summary: "Host unusual disk read latency (instance {{ $labels.instance }})" description: "Disk latency is growing (read operations > 100ms)\n VALUE = {{ $value }}\n LABELS: {{ $labels }}" - - alert: UnusualDiskWriteLatency + - alert: HostUnusualDiskWriteLatency expr: rate(node_disk_write_time_seconds_total[1m]) / rate(node_disk_writes_completed_total[1m]) > 100 for: 5m labels: severity: warning annotations: - summary: "Unusual disk write latency (instance {{ $labels.instance }})" + summary: "Host unusual disk write latency (instance {{ $labels.instance }})" description: "Disk latency is growing (write operations > 100ms)\n VALUE = {{ $value }}\n LABELS: {{ $labels }}" - - alert: HighCpuLoad + - alert: HostHighCpuLoad expr: 100 - (avg by(instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) > 80 for: 5m labels: severity: warning annotations: - summary: "High CPU load (instance {{ $labels.instance }})" + summary: "Host high CPU load (instance {{ $labels.instance }})" description: "CPU load is > 80%\n VALUE = {{ $value }}\n LABELS: {{ $labels }}" - - alert: SwapIsFillingUp + # 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"})) > 1000 + for: 5m + 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: 5m labels: severity: warning annotations: - summary: "Swap is filling up (instance {{ $labels.instance }})" + summary: "Host swap is filling up (instance {{ $labels.instance }})" description: "Swap is filling up (>80%)\n VALUE = {{ $value }}\n LABELS: {{ $labels }}" - - alert: InstanceDown - expr: up == 0 - for: 1m - labels: - severity: critical - annotations: - summary: "Instance {{ $labels.instance }} down" - description: "{{ $labels.instance }} has been down for more than 5 minutes." - - - alert: LoadAvg - expr: node_load1 > 2 - for: 1m + - alert: HostSystemdServiceCrashed + expr: node_systemd_unit_state{state="failed"} == 1 + for: 5m labels: severity: warning annotations: - description: 'High Load Avg (1min) detected for instance {{ $labels.instance }}, the utilisation is currently: {{ $value }}%' - summary: Load Average (1min) Alert + summary: "Host SystemD service crashed (instance {{ $labels.instance }})" + description: "SystemD service crashed\n VALUE = {{ $value }}\n LABELS: {{ $labels }}" + + - 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_alarm == 1 + for: 5m + 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: 5m + 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="fail"} > 0 + for: 5m + 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)) > 1 + for: 5m + 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[5m]) > 0 + for: 5m + 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[5m]) > 0 + for: 5m + labels: + severity: info + annotations: + summary: "Host EDAC Correctable Errors detected (instance {{ $labels.instance }})" + description: "{{ $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: 5m + labels: + severity: warning + annotations: + summary: "Host EDAC Uncorrectable Errors detected (instance {{ $labels.instance }})" + description: "{{ $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: increase(node_network_receive_errs_total[5m]) > 0 + for: 5m + labels: + severity: warning + annotations: + summary: "Host Network Receive Errors (instance {{ $labels.instance }})" + description: "{{ $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: increase(node_network_transmit_errs_total[5m]) > 0 + for: 5m + labels: + severity: warning + annotations: + summary: "Host Network Transmit Errors (instance {{ $labels.instance }})" + description: "{{ $labels.instance }} interface {{ $labels.device }} has encountered {{ printf "%.0f" $value }} transmit errors in the last five minutes.\n VALUE = {{ $value }}\n LABELS: {{ $labels }}" +