CoreDNS is a lightweight, plugin-based DNS server and service discovery tool for Kubernetes. It provides name resolution for services and pods within the cluster and replaces kube-dns as the default DNS solution.
Features
- Extensible: Supports plugins for custom behaviors (e.g., caching, load balancing, forwarding).
- Efficient: Handles high query volumes with minimal resource usage.
- Simplified Configuration: Managed via a single
Corefile.
CoreDNS in EKS
In EKS, CoreDNS integrates with the cluster’s networking setup to:
- Resolve pod and service names to IPs.
- Work seamlessly with the Amazon VPC CNI for VPC-native DNS resolution.
- Provide automatic DNS and service discovery for all pods and services.