Re: [Condor-users] Only run when logged of?

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

Dave STREET wrote:
>   I came up with the following script
>
> trComputer = "."   ' " use "." for local computer 
>
> Set objWMI = GetObject("winmgmts:" _ 
>            & "{impersonationLevel=impersonate}!\\" _ 
>            & strComputer & "\root\cimv2")
> Set colSessions = objWMI.ExecQuery _ 
>   ("Select * from Win32_LogonSession Where LogonType = 2") 
>      
> If colSessions.Count = 0 Then     
>   Wscript.Echo "FALSE" 
>
> Else
>   WScript.Echo "True"
>   
> End If
>
> So this echos TRUE is a user is Logged on and False is not. My questions 
> is though when you say it must return TRUE or FALSE to the STARTD_CRON 
> job I am assuming I would need to change the echo statements but I am 
> not sure what to. 
>
> Any ideas. Other wise this seems a perfect solution. 

Hi Aaron (or is it Davey?) -

Awesome!

You'd want your above script to not just echo "True" or "False, but it 
should echo to stdout "UsersLoggedIn = True" or "UsersLoggedIn = False" 
if you configure things up as Ian suggested below.

Assuming you get it all working in short order, can I persuade you to 
contributing a HOWTO recipe for this?  It would likely be of interest to 
other Condor users.  We've been trying to collect such HOWTOs on the 
Condor wiki at
  https://condor-wiki.cs.wisc.edu/index.cgi/wiki?p=HowToAdminRecipes
see the above URL to get a feeling of what I am talking about.  If you 
are interested, please just drop a note to condor-admin@xxxxxxxxxxx and 
we'll create an account for you on the wiki (anonymous users have read 
access, but an account is needed to create/edit content).

regards,
Todd


> Cheers
>
> Aaron
>
> Date: Wed, 15 Sep 2010 10:31:10 -0400
> From: ichesal@xxxxxxxxxxxxxxxxxx
> To: condor-users@xxxxxxxxxxx
> Subject: Re: [Condor-users] Only run when logged of?
>
> On Wed, Sep 15, 2010 at 8:48 AM, Dave STREET <davey_street@xxxxxxxxxxx 
> <mailto:davey_street@xxxxxxxxxxx>> wrote:
>
>     I am sure this is easy and I know some people do it, but how can I
>     make it so windows machines only accept jobs and run jobs while no
>     one is logged on, and remove jobs as soon as a user logs in? 
>
>     I can see how to set up for CPU and keyboard busy. But I want to
>     have the logged on status of the machine control when jobs can and
>     cant run? 
>
>
> Aaron,
>
> There isn't a built-in macro in Condor that indicates whether a user is 
> logged in to a machine or not. But you could write something that can be 
> called from a STARTD_CRON that returned True or False depending on 
> whether users are logged in or not.
>
> And then:
>
> STARTD_CRON_JOBLIST = LOGINCHECKER
> STARTD_CRON_LOGINCHECKER_PREFIX = LoginChecker
> STARTD_CRON_LOGINCHECKER_EXECUTABLE = c:\condor\loginchecker.exe
> STARTD_CRON_LOGINCHECKER_PERIOD = 1m
> STARTD_CRON_LOGINCHECKER_MODE = Periodic
> STARTD_CRON_LOGINCHECKER_RECONFIG = True
>
> (That syntax is likely not 100% correct, I'm working from memory here on 
> the cron syntax, but that should get you started)
>
> The output from loginchecker.exe should be ClassAd attribute syntax. So:
>
> UsersLoggedIn = (True|False)
>
> That'll produce an attribute in your machine's ad called 
> LoginCheckerUsersLoggedIn that you can reference in your 
> START/SUSPEND/PREEMPT strings:
>
> START = $(LoginCheckerUsersLoggedIn) =!= True
>
> That should also keep START = False if the cron hasn't run and the 
> attribute has never been set.
>
> - Ian
>
>
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>
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--
Todd Tannenbaum                       University of Wisconsin-Madison
Center for High Throughput Computing  Department of Computer Sciences
tannenba@xxxxxxxxxxx                  1210 W. Dayton St. Rm #4257
Phone: (608) 263-7132                 Madison, WI 53706-1685