CoreDNS is an open-source DNS server that translates domain names into IP addresses in cloud-native environments. It uses a customizable plugin-based architecture and provides valuable logs for system health insights. Monitoring CoreDNS with Prometheus and New Relic can help mitigate risks, ensure stability, and identify performance issues. Key metrics to monitor include cache hits and misses, error rates, Go metrics, performance metrics, scaling and resource metrics, and throughput metrics. Visualizing these metrics can provide real-time insights into CoreDNS's performance and help administrators troubleshoot issues quickly. New Relic offers a powerful solution for monitoring CoreDNS with its CoreDNS quickstart, providing seamless integration and free account offerings. By sending Prometheus data to New Relic, users can simplify data management and focus on innovation.