ARC CE Tips

Setup to allow gLite-WMS jobs to run

Create an empty file /usr/etc/globus-user-env.sh on all worker nodes.

Setup for LHCb

A default runtime environment must be setup. This can be done by adding the following line to the [grid-manager] section of /etc/arc.conf:

authplugin="PREPARING timeout=60,onfailure=pass,onsuccess=pass /usr/local/bin/default_rte_plugin.py %S %C %I ENV/GLITE"

This sets ENV/GLITE as a default runtime environment. The file /usr/local/bin/default_rte_plugin.py is:

1. !/usr/bin/python

"""Usage: default_rte_plugin.py <status> <control dir> <jobid> <runtime environment>

Authplugin for PREPARING STATE

Example:

 authplugin="PREPARING timeout=60,onfailure=pass,onsuccess=pass /usr/local/bin/default_rte_plugin.py %S %C %I <rte>"

"""

def ExitError(msg,code):

   """Print error message and exit"""
   from sys import exit
   print(msg)
   exit(code)

def SetDefaultRTE(control_dir, jobid, default_rte):

   from os.path import isfile

   desc_file = '%s/job.%s.description' %(control_dir,jobid)

   if not isfile(desc_file):
      ExitError("No such description file: %s"%desc_file,1)

   f = open(desc_file)
   desc = f.read()
   f.close()

   if default_rte not in desc:
      with open(desc_file, "a") as myfile:
         myfile.write("( runtimeenvironment = \"" + default_rte + "\" )")

   return 0

def main():

   """Main"""

   import sys

   # Parse arguments

   if len(sys.argv) == 5:
       (exe, status, control_dir, jobid, default_rte) = sys.argv
   else:
       ExitError("Wrong number of arguments\n"+__doc__,1)

   if status == "PREPARING":
       SetDefaultRTE(control_dir, jobid, default_rte)
       sys.exit(0)

   sys.exit(1)

if __name__ == "__main__":

   main()