[GE users] Environment variables

Reuti reuti at staff.uni-marburg.de
Wed Jan 19 09:42:32 GMT 2005


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Hi,

just to step into this discussion: is ROCKS copying the head node file sytem to 
the slave nodes or always starting in some kind of NFS mode? It is also 
possible to change the file for the tcpip services and ignore rsh/ssh requests 
completely (in SuSE it's /etc/inetd.conf or with newer installations inside the 
xinetd.d/rsh file). Only on the slave nodes of course, maybe with a "sed" 
command during the first startup to alter this setup file (if it's just a copy 
from the head node).

Cheers - Reuti


Quoting "Wheeler, Dr M.D." <mdw10 at leicester.ac.uk>:

> Thanks, maybe you could help me further, I am trying to setup a wrapper
> script that determines whether a user can login to a machine or not (I would
> like users to be able to have inrteractive access to the frontend machine but
> not the compute nodes).  So far I have this
> 
> #!/bin/bash
> #
> #wrapper script to provide shell access to frontend
> #while denying access to compute nodes
> #
> 
> FRONTEND_HOSTNAME="my.fqdn.net"
> 
> if [ "`hostname`" = "$FRONTEND_HOSTNAME" ] || [ -n "$JOB_ID" ]; then
>     #provide a bash login shell
>     /bin/bash -l
> 
> else
>     #politely refuse login and exit
>     echo ""
>     echo
> 
"############################################################################"
>     echo "You do not have permission to login on compute node `hostname`"
>     echo
> 
"############################################################################"
>     echo ""
>     sleep 1
>     exit 0
> fi
> 
> exit 0
> 
> however, while this prevents users from loggin in to a machine, it also seems
> to be preventing them submitting jobs too.
> Any ideas how I might make this work?
> 
> Martyn
> 
> ----------------------------------------------
> Dr. Martyn D. Wheeler
> Department of Chemistry
> University of Leicester
> University Road
> Leicester, LE1 7RH, UK.
> Tel (office): +44 (0)116 252 3985
> Tel (lab):    +44 (0)116 252 2115
> Fax:          +44 (0)116 252 3789
> Email:        martyn.wheeler at le.ac.uk
> http://www.le.ac.uk/chemistry/staff/mdw10.html
>  
> 
> > -----Original Message-----
> > From: Ron Chen [mailto:ron_chen_123 at yahoo.com]
> > Sent: 19 January 2005 08:35
> > To: users at gridengine.sunsource.net
> > Subject: Re: [GE users] Environment variables
> > 
> > 
> > I like this one: $JOB_ID
> > 
> > Actually, there are many variables setup by SGE, you
> > can submit a job to print all the env. vars.:
> > 
> > ==========
> > #!/bin/sh
> > 
> > env
> > ==========
> > 
> >  -Ron
> > 
> > --- "Wheeler, Dr M.D." <mdw10 at leicester.ac.uk> wrote:
> > > Is there a way of distinguishing when a user is
> > > running a job on a node via SGE and when a user is
> > > simply trying to log in to a node.  Maybe there is
> > > an environment variable set up or soemthing?  I'd
> > > like to find a simple way of distinguishing between
> > > interactive logins and jobs submitted via SGE
> > > 
> > > Thanks
> > > MArtyn
> > > 
> > > ----------------------------------------------
> > > Dr. Martyn D. Wheeler
> > > Department of Chemistry
> > > University of Leicester
> > > University Road
> > > Leicester, LE1 7RH, UK.
> > > Tel (office): +44 (0)116 252 3985
> > > Tel (lab):    +44 (0)116 252 2115
> > > Fax:          +44 (0)116 252 3789
> > > Email:        martyn.wheeler at le.ac.uk
> > > http://www.le.ac.uk/chemistry/staff/mdw10.html
> > >  
> > > 
> > >
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> > > 
> > 
> > 
> > 
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