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Configure a Custom Domain Name for HTTPRoute

When you create a HTTPRoute under amazon-vpc-lattice gatewayclass, the controller creates a AWS VPC Lattice Service during reconciliation. VPC Lattice generates a unique Fully Qualified Domain Name (FQDN) for you; however, this auto-generated domain name is not easy to remember.

If you'd prefer to use a custom domain name for a HTTPRoute, you can specify them in hostname field of HTTPRoute. Here is one example:

custom-domain-route.yaml
apiVersion: gateway.networking.k8s.io/v1alpha2
kind: HTTPRoute
metadata:
  name: review
spec:
  hostnames:
  - review.my-test.com  # this is the custom domain name
  parentRefs:
  - name: my-hotel
    sectionName: http
  rules:    
  - backendRefs:
    - name: review2
      kind: Service
      port: 8090
    matches:
    - path:
        type: PathPrefix
        value: /review2

Managing DNS records using ExternalDNS

To register custom domain names to your DNS provider, we recommend using ExternalDNS. AWS Gateway API Controller supports ExternalDNS integration through CRD source - the controller will manage DNSEndpoint resource for you.

To use ExternalDNS with the AWS Gateway API Controller, you need to:

  1. Install DNSEndpoint CRD. This is bundled with both Gateway API Controller Helm chart and files/controller-installation/deploy-*.yaml manifest, but also can be installed manually by the following command: 

    kubectl apply -f config/crds/bases/externaldns.k8s.io_dnsendpoints.yaml

    Note

    If the DNSEndpoint CRD does not exist, DNSEndpoint resource will not be created nor will be managed by the controller.

  2. Restart the controller if running already.

  3. Run ExternalDNS controller watching crd source. The following example command runs ExternalDNS compiled from source, using AWS Route53 provider: 
    build/external-dns --source crd --crd-source-apiversion externaldns.k8s.io/v1alpha1 \
--crd-source-kind DNSEndpoint --provider aws --txt-prefix "prefix."
  4. Create HTTPRoutes and Services. The controller should create DNSEndpoint resource owned by the HTTPRoute you created.
  5. ExternalDNS will watch the changes and create DNS record on the configured DNS provider.

Notes

  • You MUST have a registered hosted zone (e.g. my-test.com) in Route53 and complete the Prerequisites mentioned in this section of the Amazon VPC Lattice documentation.
  • If you are not using ExternalDNS, you should manually associate your custom domain name with your service following this section of the Amazon VPC Lattice documentation.