Waiting for DNS propagation hangs cluster start

Couchbase install on new on-prem system, trying to use old values file.
Am held up with log entry:

"logger":"cluster","msg":"Waiting for DNS propagation","cluster":"couchbase/couchbasedev","hostname":"myhostname.mydomain.com"}

And it never resolves. I’m not familiar with this message, is it trying to update dns directly? (it can’t), is it trying to check the couchbasedev pod externally assigned IP (it has one)?
Do I need to add a hosts (or dns) entry for the external IP address against the hostname?