[Beowulf] block runing jobs individually on each node

jerry xu jerry at oban.biosc.lsu.edu
Thu Apr 7 14:51:46 EDT 2005


Thanks, Reuti:
   However, I cannot block ssh/rsh completely since there are many
communications among each node when we run our own program such as input
and output data from files located at master node.

   I just want to forbid people running any of their own program at each
node. They are only allowed to submit job through the batch system
(OpenPBS).

Sincerely,
Jerry

On Thu, 2005-04-07 at 13:34, Reuti wrote:
> Hi,
> 
> disable rsh/ssh completely. Instead have a queue on each node for an 
> interactive login. This way they will get a bash as child from the pbs_mom, and 
> you can control the maximum runtime.
> 
> If you need still ssh for admin usage: limit the access to the conventional ssh 
> in /etc/ssh/sshd_conf to some users:
> 
> AllowUsers jerry
> 
> Cheers - Reuti
> 
> PS: Another solution: set an ulimit for the maximum runtime for an interactive 
> login in /etc/profile.local.
> 
> 
> Quoting jerry xu <jerry at oban.biosc.lsu.edu>:
> 
> > Hi, Dear All:
> >    I am managing a simple 24 nodes beowulf cluster, basically I require
> > all my jobs are running through PBS. However, some undergraduate
> > students in our lab always try to ssh to each individual node in the
> > cluster and run their jobs, which is pretty bad for me to managing the
> > resources and control my program running status. I remember there is way
> > to block people running job that is seperated from the batch system but
> > at the same time still allow them ssh to each node to grab some tmp
> > files?. But I just donot remember how to do it, can anyone give some
> > directions?
> > 
> > Thanks so much,
> > 
> > 
> > Jerry
> > 
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