How do I ensure only 1 hangfire server is running…
You’d have to update whatever JobStorage implementation you’re using. If you can go to the trouble of modifying AnnounceServer and RemoveServer, then it would just be easier to enforce the one server in your organization (or wherever), by simply making it a business rule. “Hey team, don’t start more than one server”.
I am curious though why you would have the requirement of only using 1 server. And do you mean, 1 dashboard, or 1 job server?