Load Balancing NFS

Salvatore J. Guercio Jr. sguercio at ccr.buffalo.edu
Wed Jun 11 20:37:40 BST 2003

Good afternoon lvs users;

I hope you can help me.

I currently have a LVS setup that consists of 2 directors and 2 
realservers. I have the LVS setup to serve http right now and It works 
great. I used the Ultramonkey software packages for RedHat Linux 7.3. 
The topology I am using the High Capacity High Availability and Load 
Balancing topology.

The realservers are each connected to an IBM FastT500 fibre channel SAN 
and I need to export a filesystem on this SAN to 4 clients. The 
filesystem on the SAN will be GPFS or some parallel filesystem. Has 
anyone set up ldirectord to export NFS filesystems? I have setup the 
ltdirectord.cf file to look like this:

        real= gate
        real= gate

I get the following from   /sbin/ipvsadm -L -n

IP Virtual Server version 1.0.7 (size=65536)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn  
UDP rr persistent 600
  ->           Route   1      0          0        
  ->           Route   1      0          0        
  ->               Local   0      0          0        
UDP rr persistent 600
TCP rr
  ->             Route   1      0          0        
  ->             Route   1      0          0        
  ->                 Local   0      0          0        

I can mount the exported filesystem directly from the client, but when I 
try to mount it from the VIP I get a "mount: RPC: Program not 
registered" error message.

Is there something (or a bunch of things) that I am missing?  Help would 
be greatly appreciated!

Thank You,


Salvatore J. Guercio Jr.            http://www.ccr.buffalo.edu
Sr. Programmer Analyst              sguercio at buffalo.edu
Center for Computational Research
9 Norton Hall
Amherst, NY 14260

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