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nixfiles/hosts/monitoring-3/rules.yml

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groups:
- name: alert.rules
rules:
- alert: InstanceDown
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expr: up{job="node-exporter"} == 0
for: 5m
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labels:
severity: critical
annotations:
summary: "Endpoint {{ $labels.instance }} down"
description: "{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 1 minutes."
- alert: InstanceUptime
expr: time() - node_boot_time_seconds{job="node-exporter"} >= 7776000
labels:
severity: warning
annotations:
summary: "Uptime of {{ $labels.instance }} more than 90 days"
description: "The last reboot of {{ $labels.instance }} was more than 90 days ago"
- alert: InstanceConfigNotSync
expr: nixos_current_system_is_sync{} == 0
for: 2h
labels:
severity: warning
annotations:
summary: "Current system of {{ $labels.instance }} not in sync with config"
description: "The current system hash of {{ $labels.instance }} does not match the one generated by hydra based on the current config"
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- alert: BackupStorageFull
expr: ((node_filesystem_avail_bytes{instance="clerie-backup.mon.clerie.de:9100", job="node-exporter", mountpoint="/mnt/clerie-backup"} / node_filesystem_size_bytes{instance="clerie-backup.mon.clerie.de:9100", job="node-exporter", mountpoint="/mnt/clerie-backup"}) * 100) < 5
for: 30m
labels:
severity: critical
annotations:
summary: "Storage for backup is nearly full"
description: "Storage for backups is nearly full"
- alert: InstanceJustBooted
expr: time() - node_boot_time_seconds{job="node-exporter"} <= 300
labels:
severity: warning
annotations:
summary: "Uptime of {{ $labels.instance }} less than 5 min"
description: "{{ $labels.instance }} just booted"
- alert: EventInstanceDown
expr: up{job="node-exporter", service_level="event"} == 0
for: 2h
labels:
mute: instance
severity: muted
annotations:
summary: "Event instance {{ $labels.instance }} down"
description: "{{ $labels.instance }} has been down for more than 2 hours."