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groups:
- name: dns
rules:
- alert: NsMismatch
for: 5m
expr:
count by (Name, Target, host, job) (dns_lg_answer_section_rr_info{Type="NS"}) != on (Name) group_left count by (Name) (group by (instance, Name) (dns_lg_answer_section_rr_info{Type="NS"}))
labels:
severity: critical
annotations:
summary: NS not found in all name severs
description: The NS {{ $labels.Target }} has not been found on all name servers of zone {{ $labels.Name }}
- alert: SerialMismatch
for: 5m
expr:
count by (Name, host, job) (group by(Name, Serial) (dns_lg_answer_section_rr_info{Type="SOA"})) > 1
labels:
severity: critical
annotations:
summary: Serial out of sync
description: Name servers for zone {{ $labels.Name }} are serving {{ $value }} different values of the serial