Whirr support the following instance roles: dn, jt, nn, tt, zk, hbase-avroserver, hbase-master, hbase-regionserver, hbase-restserver, hbase-thriftserver and as you can see the naming is inconsistent and sometimes it's hard to guess the meaning.
Should we have a convention for role names? I believe this is important now that service-name is optional. -- Andrei Savu
