Key metrics for CoreDNS monitoring

CoreDNS is an open-source DNS server that can resolve requests for internet domain names and provide service discovery within a Kubernetes cluster. It's the default DNS provider in Kubernetes as of v1.13, simplifying cluster networking by enabling clients to access services using DNS names rather than IP addresses. Monitoring CoreDNS is crucial to ensure that elevated latency or error rates are not disrupting communication among your services and causing bottlenecks in your application.

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