I'll just point out that that doc that Jane linked to is pretty outdated.  It should still work in theory but a lot has changed in terms of the back end architechture since that was written.  The Distributed Collectors pack is your best bet as it simplifies the process.  Distributed collectors are not officially supported in core which is why that ZenPack was written.

I just went through this. The steps I took where:

deploy collector instance (vm or otherwise)  

run autodeploy script 

chkconfig rabbitmq-server off

chkconfig snmpd off

chkconfig memcached off

chkconfig mysql off 

service rabbitmq-server stop

service snmpd stop

service memcached stop

service mysql stop

setup hub zenoss user ssh keys on  collector vm as per http://community.spiceworks.com/education/projects/Passwordless_SSH_Using_Shared_Keys

Make sure you install the distributed zenpacks collector: docs/DOC-5861

Restart zenoss on hub

After zenoss is done restarting, login goto advanced -> collectors  -> add remote monitor  (and all your remote monitors resolveable hostname or ip) 

Afterwards you will need to edit the daemon configs in /opt/zenoss/etc

And I mean all the daemons... all the daemons should point to your hub's ip/resolve hostname in the following line:

#

# Configuration file for zenrender

#

#  To enable a particular option, uncomment the desired entry.

#

# Parameter     Setting

# ---------     -------

#

# Host of zenhub daemon. Default is localhost.,

#  default: localhost

hubhost myzenosshuborhubip

I did this for the zenrender.conf

zenperfsnmp e.t.c. (all of them) 

After you are done doing this on the collector you should  do a "zenoss restart" as the zenoss user. Once you do this you will be able to use your collector without any issues.

Hi,

Yes I only made the daemon configuration changes on the collector. 

I had this same problem. Check the hubpasswd ($ZENHOME/etc/) on your master and and make sure it matches the hub password on your collector in the global.conf ($ZENHOME/etc). The hub password in the global.conf was the last line. I would restart zenoss on your collector after this.

I also I had a problem with this install because of hosts.allow and hosts.deny. No zenoss service could talk to rrdcached. Remove/rename or add a line to these files to allow rrdcaches to accessed locally

Also make sure you do not have a stray zenoss services running. I stopped zenoss completely and still had some stray zenoss services running (zenhubworker, zope) so I had to kill them manually.