homelab-dynamic-dns

Goal is to provide automatic DNS updates in a homelab setting where your external IP is not known to the cluster and while also providing updates to internal IPs. This is done through a combination IPLookup and DNSProvider Custom Resources and Annotations on the Ingresses that should have DNS entries managed.

Current functionality is limited to Ingress objects with Services to be added.

Example

IPLookup performs a GET on an HTTP endpoint and updates the status of the returned IP address

apiVersion: networking.thehomelab.tech/v1alpha1
kind: IPLookup
metadata:
  name: aws
spec:
  type: http
  config:
    http:
      url: https://checkip.amazonaws.com

DNSProvider is your DNS provider that you are using to update records.

apiVersion: networking.thehomelab.tech/v1alpha1
kind: DNSProvider
metadata:
  name: thehomelab-tech-aws
spec:
  type: aws
  config:
    aws:
      hostZoneID: AAABBBCCC123
      ttl: 300

Ingress requires 3 annotations to be watched by this controller:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: thehomelab-tech
  annotations:
    thehomelab.tech/dnsprovider: thehomelab-tech-aws # name of the DNSProvider CR to use
    thehomelab.tech/ip-address: external # Public IP; use 'internal' for ingress IP
    thehomelab.tech/iplookup: aws # name of IPLookup CR to use
spec:
  rules:
  - host: www.thehomelab.tech
    http:
      paths:
      - backend:
          service:
            name: web
            port:
              number: 8080
        path: /
        pathType: ImplementationSpecific
  tls:
  - hosts:
    - www.thehomelab.tech
    secretName: thehomelab-tls