In our configuration (3 master nodes, 4 private agent) when the master leader is lost, cluster become unstable.
I know that it is not optimal, but our upstream dns server already has a mesos zone.
The problem may be related to leader.mesos record in mesos dns. It seems that if leader.mesos is not defined in dcos-mesos-dns, it forwards the request to upstream server and if the record is present it receives a wrong ip.
Is it possible to disable query forward from mesos-dns only for his domain ".mesos" ?