Make a dns operator

[oscrx]

I'd like to manage the node reachability on the Kubernetes node object

Now we have a script that runs every 5 minutes, checks if ninoo.nl is up and add's or removes some records from the Cloudflare dns servers.

I'd like to extend that health check a bit with inter-connectivity checks. If a node cannot reach the majority of the cluster I'd like to take it out of the pool.

Another data point it should process is the node status. When I drain a node for maintenance I'd like that the dns records are removed instantly. The same if the node gets the NotReady label.

Maybe operator is not the correct terminology. A software deamon that subscribes on the kube-api events and looks at stuff like this:
https://kubernetes.io/docs/reference/labels-annotations-taints/#kubernetesiohostname