Note: The primary/central server is A and the additional one is B. Both of these servers sit behind a firewall so apache is used with the mod_rewrite module in order to access zenoss over port 80 from the desktop.

1. Create DNS CNAMEs
   Host A: "zenoss.YOURDOMAIN.com"
   Host B: "B.zenoss.YOURDOMAIN.com"

2. Open the following TCP ports between Host A and Host B.
   8789
   8100
   8080
   8081
   

3. Configure the following daemons on B to connect to A's zenhub and appropriate monitor
   zenperfsnmp
zencommand
zenprocess
zenwin
zeneventlog
zenwinmodeler
with the following in the .conf file:
monitor         B.zenoss.YOURDOMAIN.com
hubhost         zenoss.YOURDOMAIN.com

4. Create a performance monitor on host A with the name of:
   "B.zenoss.YOURDOMAIN.com" or "B" (either have worked)

   • Set the RenderURL to "http://B.zenoss.YOURDOMAIN.com:80" (or 8080 depending on your configuration)
   • You can use the admin login/password for the Render User/Pass

    

5. Modify the $ZENHOME/Products/PluggableAuthService/plugins/CookieAuthHelper.py Line containing "setCookie" to the following: response.setCookie(self.cookie_name, quote(cookie_val), path='/', domain='.zenoss.yourdomain.com')

6. Have Zope on B use the ZODB server on A:
   Edit $ZENHOME/etc/zope.conf on B: Search for the zeoclient section and change the server to zenoss.YOURDOMAIN.com

7. Modify the Zenoss startup on B to the following:
   Edit $ZENHOME/bin/zenoss:
#C="$C zeoctl"
C="$C zopectl"
#C="$C zenhub"
#C="$C zenping"
#C="$C zensyslog"
#C="$C zenstatus"
#C="$C zenactions"
#C="$C zentrap"
#C="$C zenmodeler"
##C="$C zenrender"
C="$C zenperfsnmp"
C="$C zencommand"
C="$C zenprocess"
##C="$C zenmail"

8. Apache:
   I had to change the rewrite mode to update it with the "zenoss.YOURDOMAIN.com" in the rule ServerName also needs to be "B.zenoss.YOURDOMAIN.com" on B and "zenoss.YOURDOMAIN.com" on A.

9. Remove the weekly cron job for zenoss to run zeopack.
   

Now this works...I get the graphs etc. I know I need to set the permissions for the database so events can be seen from B but I am only looking to this to work from A at the moment. I don't see B being access directly, yet.

Note: When doing an upgrade, you really should upgrade all of the servers. I'll update this How To when I do an upgrade. Remember to put back the code change in step 4.