2023-03-23

1 files changed, 552 insertions, 0 deletions

diff --git a/modules/nixos/monitoring/rules/node.yaml b/modules/nixos/monitoring/rules/node.yaml
new file mode 100644
index 0000000..81d7810
--- /dev/null
+++ b/modules/nixos/monitoring/rules/node.yaml
@@ -0,0 +1,552 @@
+---
+groups:
+  - name: Node
+
+    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).
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              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).
+
+              VALUE = {{ $value }}
+              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).
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - alert: HostUnusualDiskReadRate
+        expr: >-
+          sum by (instance) (rate(node_disk_read_bytes_total[2m]))
+          / 1024
+          / 1024
+          > 50
+        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).
+
+              VALUE = {{ $value }}
+              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).
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - 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).
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - 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.
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - alert: HostOutOfInodes
+        expr: >-
+          node_filesystem_files_free
+          / node_filesystem_files * 100
+          < 10
+          and
+          ON (instance, device, mountpoint) node_filesystem_readonly
+          == 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).
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - alert: HostInodesWillFillIn24Hours
+        expr: >-
+          node_filesystem_files_free
+          / node_filesystem_files
+          * 100
+          < 10
+          and
+          predict_linear(node_filesystem_files_free[1h], 24 * 3600)
+          < 0
+          and ON (instance, device, mountpoint) node_filesystem_readonly
+          == 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.
+
+              VALUE = {{ $value }}
+              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).
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - 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).
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - alert: HostHighCpuLoad
+        expr: >-
+          sum by (instance)
+            (avg by (mode, instance)
+              (rate(node_cpu_seconds_total{mode!="idle"}[2m])))
+          > 0.8
+        for: 0m
+        labels:
+          severity: warning
+        annotations:
+          summary: Host high CPU load (instance {{ $labels.instance }})
+          description: |-
+            CPU load is > 80%.
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - alert: HostCpuHighIowait
+        expr: |-
+          avg by (instance) (rate(node_cpu_seconds_total{mode="iowait"}[5m]))
+          * 100
+          > 10
+        for: 0m
+        labels:
+          severity: warning
+        annotations:
+          summary: Host CPU high iowait (instance {{ $labels.instance }})
+          description: |-
+            CPU iowait > 10%. A high iowait means that you are disk or network
+            bound.
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - alert: HostUnusualDiskIo
+        expr: >-
+          rate(node_disk_io_time_seconds_total[1m]) > 0.5
+        for: 5m
+        labels:
+          severity: warning
+        annotations:
+          summary: Host unusual disk IO (instance {{ $labels.instance }})
+          description: |-
+            Time spent in IO is too high on {{ $labels.instance }}. Check storage for issues.
+
+              VALUE = {{ $value }}
+              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%).
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              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.
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - alert: HostNetworkInterfaceSaturated
+        expr: >-
+          (
+            rate(node_network_receive_bytes_total{device!~"^tap.*|^vnet.*|^veth.*|^tun.*"}[1m])
+            +
+            rate(node_network_transmit_bytes_total{device!~"^tap.*|^vnet.*|^veth.*|^tun.*"}[1m])
+          )
+          / node_network_speed_bytes{device!~"^tap.*|^vnet.*|^veth.*|^tun.*"}
+          > 0.8
+          < 10000
+        for: 1m
+        labels:
+          severity: warning
+        annotations:
+          summary: Host Network Interface Saturated (instance {{ $labels.instance }})
+          description: |-
+            The network interface "{{ $labels.device }}" on "{{ $labels.instance }}"
+            is getting overloaded.
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - alert: HostNetworkBondDegraded
+        expr: >-
+          (node_bonding_active - node_bonding_slaves) != 0
+        for: 2m
+        labels:
+          severity: warning
+        annotations:
+          summary: Host Network Bond Degraded (instance {{ $labels.instance }})
+          description: |-
+            Bond "{{ $labels.device }}" degraded on "{{ $labels.instance }}".
+
+              VALUE = {{ $value }}
+              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 approaching limit.
+
+              VALUE = {{ $value }}
+              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. Ensure NTP is configured
+            correctly on this host.
+
+              VALUE = {{ $value }}
+              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. Ensure NTP is configured on this host.
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}
+
+      - alert: HostRequiresReboot
+        expr: >-
+          node_reboot_required > 0
+        for: 4h
+        labels:
+          severity: info
+        annotations:
+          summary: Host requires reboot (instance {{ $labels.instance }})
+          description: |-
+            Instance {{ $labels.instance }} requires a reboot.
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}