Troubleshooting DNS Issues in Kubernetes | CoreDNS, Network Policies & Real Fixes

Struggling with **DNS issues in your Kubernetes cluster**? 🧩 This video offers a structured, in-depth approach to debugging **CoreDNS problems**, service resolution errors, and intermittent DNS failures that often cripple production workloads.

🚑 Topics Covered:
- How to verify CoreDNS status, logs, and ConfigMap (Corefile) configs
- Using debug pods to test service discovery from within the cluster
- Diagnosing DNS policy misconfigurations and namespace mismatches
- Common culprits: network policies, resource limits, ndots settings
- Analyzing CoreDNS metrics and plugin chain optimizations
- Using NodeLocal DNSCache for performance and reliability
- TCP vs UDP for DNS traffic in packet-loss environments
- Horizontal autoscaling of CoreDNS to prevent overload

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#Kubernetes #DNS #CoreDNS #DevOps #ClusterNetworking #K8sTroubleshooting #ServiceDiscovery #CloudNative #DevOpsInterview

Видео Troubleshooting DNS Issues in Kubernetes | CoreDNS, Network Policies & Real Fixes канала DevOpsInterviewCloud