In T245569 we get 4 new druid nodes:
- an-druid100[1,2] - analytics VLAN, will be added to the Analytics cluster
- druid100[7,8] - private VLAN, will be added to the Public cluster
/var/lib/druid is now moved under /srv/druid, so we should modify puppet accordingly. There might also be the need for hosts to co-exist with two configs (maybe adding a symlink to keep sanity/compatibility).