This vm should be the entry point to be able to use tools like Hive, Oozie, Spark with the Hadoop testing cluster (where we enabled kerberos). The ganeti VM should be a basic VM, probably 2 cores and 4/6 GB of ram are enough. The more storage we have the better, since people will have to upload some data to test. I'd say that 100/150G should be enough.
network config: no public ip, analytics vlan
OS: Debian Stretch