[Beowulf] block runing jobs individually on each node

Reuti reuti at staff.uni-marburg.de
Thu Apr 7 11:34:57 PDT 2005


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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