[HTCondor-users] htcondor.send_command for a remote condor

[Colson Driemel <colsond@xxxxxxx>]

Hi all,

I've been helping develop a system that tracks/issues commands to 
jobs/machines via the python bindings and I've run into a situation that 
I don't see covered in the docs.

The system tracks jobs and machines from multiple condor instances and 
issues simple commands like DaemonsOffPeaceful. The commands work fine 
if the machines are located on the local condor but I don't see a way to 
issue a command to a remote condor. Unlike the Schedd and Collector 
python object the htcondor.send_command() does not require 
initialization as it uses the "htcondor" directly from the python import.

What I'd like to do is issue a command via send_command to a remote 
condor instance (not the one running on my local machine).

Typical workflow looks like this:


#initialize a collector object to query for the machine classad i'd like 
to issue the command to
condor_session = htcondor.Collector(condor_host) #condor_host can be the 
local or the remote host

#query for the classad
condor_classad = condor_session.query(master_type, 'Name=="%s"' % 
resource.name.split("@")[1])[0] #i've confirmed this is returning the 
desired classad

#then finally issue the command
result = htcondor.send_command(condor_classad, 
htcondor.DaemonCommands.DaemonsOffPeaceful)


Which works nicely if the condor_host is the local one but if its a 
remote host then i get an error:

File "/opt/cloudscheduler/data_collectors/condor/csmachines.py", line 
208, in command_poller
   result = htcondor.send_command(condor_classad, 
htcondor.DaemonCommands.DaemonsOffPeaceful)
RuntimeError: Failed to start command.


I understand that what this is probably doing is issuing the command to 
the local condor which has no idea what the classad I'm passing in is. 
Anyone know of a way around this?


Many Thanks,
-Colson