Hey.
Would be a nice feature, if zktop per default tries:
--config=/etc/zookeeper/conf/zoo.cfg
before it does the implicit --server localhost:8121
What people typically want is probably that they see all the ZKs from their ensemble, and only when no /etc/zookeeper/conf/zoo.cfg is found, it should try localhost:8121.
Distros could easily adapt the path to whatever their ZK server uses as default config location.
Cheers,
Chris.