Hi Brian,
Did you try to submit a job to the cluster, or why do you think that it is “not working”? You won’t find anything in the /etc/hosts files, that’s just simply not how things are working in a Cloudbreak cluster. Cloudbreak is using Consul for service discovery and DNS, you can find more about it in the documentation: https://github.com/sequenceiq/cloudbreak#consul.
Marton