I am trying to run a python script for the newVolume Event on bacula 
5.01 on Ubuntu 10.04 with python 2.6.5

The installation is actually working without python scripting and the 
LabelFormat directive in the bacula-dir.conf, but for the test I have 
removed the LabelFormat from the pool definition.

The backup is written to file volumes on a hard disk.

For activating python scripting I added:
Scripts Directory = "/etc/bacula/python-scripts"
to the Director configuration.

This seems to work fine, since messages set with job.JobReport in the 
script show up in the console messages.

This is the script I want to use, but it won't work:

#######################################

# Bacula Python interface script for the Director
#

# You must import both sys and bacula
import sys, bacula

# This is the list of Bacula daemon events that you
#  can receive.
class BaculaEvents(object):
  def __init__(self):
     # Called here when a new Bacula Events class is
     #  is created. Normally not used
     noop = 1

  def JobStart(self, job):
     """
       Called here when a new job is started. If you want
       to do anything with the Job, you must register
       events you want to receive.
     """
     events = JobEvents()         # create instance of Job class
     events.job = job             # save Bacula's job pointer
     job.set_events(events)       # register events desired
     sys.stderr = events          # send error output to Bacula
     sys.stdout = events          # send stdout to Bacula


  # Bacula Job is going to terminate
  def JobEnd(self, job):
     jobid = job.JobId
     client = job.Client
     job.JobReport="Python Dir JobEnd output: JobId=%d Client=%s.\n" % 
(jobid, client)

  # Called here when the Bacula daemon is going to exit
  def Exit(self, job):
      print "Daemon exiting."

bacula.set_events(BaculaEvents()) # register daemon events desired


"""
  These are the Job events that you can receive.
"""

class JobEvents(object):
  def __init__(self):
     # Called here when you instantiate the Job. Not
     # normally used
     noop = 1

  def JobInit(self, job):
     # Called when the job is first scheduled
     noop = 1

  def JobRun(self, job):
     # Called just before running the job after initializing
     #  This is the point to change most Job parameters.

  def NewVolume(self, job):
     # Called when Bacula wants a new Volume name. The Volume
     #  name returned, if any, must be stored in job.VolumeName
     jobid = job.JobId; client = job.Client; numvols = job.NumVols
     name = client.partition(".")[0]
     nextNum = 0
     while TRUE:
       nextNum = nextNum + 1
       newVolume = "%s-backup-volume-%0.4d" % (name, nextNum)
       if not job.DoesVolumeExist(newVolume):
         job.VolumeName = newVolume
         job.JobReport = "New volume name: %s \n" % (newVolume)
         return 1
       elif nextNum > 10000:
         job.JobReport = "Error: can't create new volume label"
         return 0
#     job.JobReport = "Creating volume label: JobId=%d Client=%s 
NumVols=%d" % (jobid, client, numvols)


  def VolumePurged(self, job):
     # Called when a Volume is purged. The Volume name can be referenced
     #  with job.VolumeName
     noop = 1


#######################


When I run this script, then none of the two active job.JobReport 
messages in the script show up and the backup job goes in state "waiting 
for appendable volume"


I have replaced the newVolume event handler with something primitive 
like this:

#########################

def NewVolume(self, job):
  job.VolumeName = "test"
  job.jobReport = "name set"
  return 1

###########################


This time the message "name set" shows up and a new medium "test" is 
added to the catalog, but the backup hangs and bacula never creates a 
volume "test" on the disk.

Where should I start to look at for fixing the problem?

Regards,

Detlef Grittner


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