External DNS

Component Category

Network / DNS automation

Component Description

ExternalDNS automates the creation and management of DNS records from Kubernetes resources.

Why It Is Used

In BullSequana AI Runtime, ExternalDNS simplifies service publication by keeping DNS records aligned with exposed services and ingress resources. This reduces manual DNS operations and improves consistency across environments.

Learn More

• ExternalDNS documentation
• kubernetes-sigs/external-dns on GitHub

Deployment notes

External DNS deploys into the external-dns namespace at sync wave 5 in the common tier. It is configured with the Azure DNS provider and watches Service, HTTPRoute, and GRPCRoute resources to create DNS records automatically. The sync interval is two minutes.

Interacts With

• Gateway API, because it watches HTTPRoute and Gateway resources to publish DNS records for exposed endpoints.
• cert-manager, because both depend on the same routable DNS zones for public endpoint setup and certificate validation.
• Platform UIs and APIs such as Argo CD, Grafana, Temporal, and PgAdmin, whose hostnames are published through DNS automation.