ExternalDNS
Kubernetes controller som auto-skapar DNS-records baserat på Service/Ingress-objekt. Annotate Ingress med external-dns.alpha.kubernetes.io/hostname=example.com → DNS provider får record. Standard för cloud-Kubernetes.
Stödjer 30+ DNS-providers: Route53 (AWS), Cloudflare, Google Cloud DNS, Azure DNS, DigitalOcean, OVH, RFC 2136 (Bind), Pi-hole. Watches K8s API för changes, syncs to DNS. Use case: deploy app, Service-with-LoadBalancer auto-creates DNS-record matching service-IP. No manual DNS-management. Skiljs från cert-manager: cert-manager hanterar TLS-certs, ExternalDNS hanterar DNS-records. Tillsammans: automated public-services. CNCF Sandbox-project, mature + production-tested.