We had similar issue with openstack Queens with swarm COE, after tracing code, observed that magnum-conductor stops after connection to public discovery endpoint, while creating cluster, I enabled and changed discovery url from https to http in maganum.conf and it worked for us.
We had similar issue with openstack Queens with swarm COE, after tracing code, observed that magnum-conductor stops after connection to public discovery endpoint, while creating cluster, I enabled and changed discovery url from https to http in maganum.conf and it worked for us.