DNS / CoreDNS
Richieste DNS totali per zona/protocollo
Section titled “Richieste DNS totali per zona/protocollo”sum by (zone, proto) (rate(coredns_dns_requests_total[5m]))Errori DNS (SERVFAIL/NXDOMAIN oltre soglia)
Section titled “Errori DNS (SERVFAIL/NXDOMAIN oltre soglia)”sum by (rcode) (rate(coredns_dns_responses_total{rcode=~"SERVFAIL|REFUSED"}[5m]))Latenza risoluzione DNS (p99)
Section titled “Latenza risoluzione DNS (p99)”histogram_quantile(0.99, sum by (le) (rate(coredns_dns_request_duration_seconds_bucket[5m])))Cache hit ratio CoreDNS
Section titled “Cache hit ratio CoreDNS”sum(rate(coredns_cache_hits_total[5m])) / sum(rate(coredns_cache_requests_total[5m]))Pod CoreDNS non Ready
Section titled “Pod CoreDNS non Ready”kube_pod_status_ready{namespace="openshift-dns", condition="false"}