[Condor-users] Flocking to a NAT

[Jim Summers <jsummers@xxxxxxxxxxxxxxxxx>]

Hello All,

We are deciding how best to connect to separate pools.  We are looking at 
flocking as the first option.  I have checked the online docs and haven't 
turned up much searching.

Our setup is, pool_a is composed of machines on a public net. Pool_b has a 
central manager that is publicly accessible and it can also access the execute 
nodes on the NAT. So before we go to far with testing and re-configuring we 
were wondering if this would work?  We are trying to decide if flocking from 
pool_a to pool_b will work.

It seems that the startd process(pool_a) will contact the central manager in 
the FLOCK_TO list (pool_b) when needed.  But from there it is difficult to 
tell which processes / machines will communicate with each other?  Does the CM 
(pool_b) verify the request is from a host in the FLOCK_FROM and then 
negotiate the job on behalf of the remote (pool_a) and then hand it to an 
execute node (pool_b) in it's pool?  Then when the job is complete the execute 
node (pool_b) would notify it's CM (pool_b) and that CM would in turn notify 
the startd (pool_a) from the originating submit?

Or once the CM (pool_b) verifies the FLOCK_FROM is valid, it then negotiates 
with one of it's execute nodes and then tells the originating submit/startd 
(pool_a) and then from there all communication is between the nodes and not 
the CM?



TIA
--
Jim Summers
School of Computer Science-University of Oklahoma
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