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groups:
- name: coredns
rules:
- alert: core-dns/panics
expr: increase(coredns_panics_total[1m]) > 0
for: 0m
labels:
severity: page
annotations:
summary: "CoreDNS is experiencing panic"
description: "Number of CoreDNS panics encountered: {{ $value }}"
- alert: core-dns/cache-misses
expr: rate(coredns_cache_misses_total{}[10m]) / rate(coredns_cache_misses_total{}[10m] offset 10m) > 5.00
for: 2h
labels:
severity: page
annotations:
summary: "High CoreDNS cache misses in last 2 hours"
description: "This can sometimes be an indication of networking troubles, currently {{ $value | humanizePercentage }} over last 2 hours."
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