CoreDNS monitoring with Prometheus and New Relic

CoreDNS, the default DNS server for Kubernetes v1.23+, is crucial for service discovery and name resolution, but its malfunction can lead to significant outages in Kubernetes clusters. Monitoring CoreDNS with tools like Prometheus and New Relic is essential to ensure system stability, as these platforms provide insights into CoreDNS performance through metrics such as cache efficiency, error rates, query response times, and resource utilization. CoreDNS operates as a customizable, open-source DNS server that translates domain names into IP addresses using a plugin-based architecture, and its logs offer valuable information on system health and performance. To prevent disruptions, it's important to keep track of various metrics, including cache hits and misses, DNS query throughput, and error codes, with New Relic offering seamless integration for managing Prometheus data. Effective CoreDNS monitoring is critical for maintaining the functionality of Kubernetes clusters, and New Relic's CoreDNS quickstart provides a robust solution for visualizing performance data and troubleshooting issues, enabling users to focus on innovation while managing data efficiently.