This is an operator that manages etcd DNS entries for masters in an OpenShift cluster.

Part of the work of recovering a master that has been destroyed or restarted is updating the DNS entry that is used to identify it as a member of the etcd cluster. These are entries in the form of [cluster-name]-etcd-[index].[domain]. In AWS, these are records in the private Route53 zone that belongs to the cluster. Automatically updating these makes the job of recovering the master much simpler.

The operator leverages external-dns to update DNS records in the cloud provider. It watches cluster-api Machine resources and obtains internal IPs from them. It then uses those IPs to create a custom resource with machine names and addresses.