ff0x/dyndns repository overview

⁠DynDNS-controller

This is an "flant/shell-operator" based container image for Kubernetes, running a small DynDNS controller that annotates Ingress objects with the current external IP address. Useful in conjurance with "kubernetes-sigs/external-dns".

Please see manifests/03-Deployment.yaml for all available configuration options.

Currently the IPv4 address found is prioritized.

⁠Usage

Create an Ingress object with the following annotation (default, when using 'external-dns'), replace the hostname:

    kubectl annotate --overwrite ingress -n kube-system traefik "external-dns.alpha.kubernetes.io/hostname=this-is-fine.io"

As soon as the controller updates the external IP address (default, every 15 minutes), each Ingress object matching the annotation above gets updated (default, every 3 minutes) with the following annotation:

    kubectl get ingress -n kube-system traefik -o json | \
      jq -r '.metadata.annotations."external-dns.alpha.kubernetes.io/target"'

Aside of the scheduled update of all Ingress resources, the controller watches also for creations and modifications.

Repo: https://git.sr.ht/~ff0x/dyndns⁠