Revision 0bb376ce ganeti/snf-ganeti-hook.py

b/ganeti/snf-ganeti-hook.py
14 14 

  		





  15
  15
  
    
"""


  		





  16
  16
  
    
import logging


  		





  17
  
  
    
from django.core.management import setup_environ


  		





  18
  17
  
    

  		





  19
  18
  
    
import sys


  		





  20
  19
  
    
import os


  		





  21
  20
  
    

  		





  22
  
  
    
# Discover the path for the Synnefo project.


  		





  23
  
  
    
#


  		





  24
  
  
    
# IMPORTANT:


  		





  25
  
  
    
# This assumes this script has been *linked* into the /etc/ganeti/hooks


  		





  26
  
  
    
# directory on the master and nodes, and that it lives in a ganeti/ directory


  		





  27
  
  
    
# under the Synnefo project root.


  		





  28
  
  
    

  		





  
  21
  
    
# IMPORTANT: PYTHONPATH must contain the parent of the Synnefo project root.


  		





  29
  22
  
    
try:


  		





  30
  
  
    
    target = os.readlink(sys.argv[0])


  		





  31
  
  
    
except OSError:


  		





  32
  
  
    
    target = sys.argv[0]


  		





  33
  
  
    
target_script = os.path.abspath(target)


  		





  34
  
  
    
target_dirname = os.path.dirname(target_script)


  		





  35
  
  
    

  		





  36
  
  
    
if os.path.split(target_dirname)[1] != "ganeti":


  		





  37
  
  
    
    raise Exception, "Unexpected location for the Synnefo Ganeti hook, " \


  		





  38
  
  
    
        "cannot determine Synnefo project root.\n" \


  		





  39
  
  
    
        "This script run as: %s\nLocation determined to be at: %s\n" \


  		





  40
  
  
    
        "Script in %s, not under ganeti/ directory." % \


  		





  41
  
  
    
        (sys.argv[0], target_script, target_dirname)


  		





  42
  
  
    

  		





  43
  
  
    
# Add the parent of the project root to sys.path (for Python imports),


  		





  44
  
  
    
# then load Django settings.


  		





  45
  
  
    
# FIXME: Why do import references start at synnefo.* ?


  		





  46
  
  
    
synnefo_project_root = os.path.split(target_dirname)[0]


  		





  47
  
  
    
sys.path.append(os.path.join(synnefo_project_root, '..'))


  		





  48
  
  
    

  		





  49
  
  
    
import synnefo.settings as settings


  		





  50
  
  
    
setup_environ(settings)


  		





  
  23
  
    
    import synnefo.settings as settings


  		





  
  24
  
    
except ImportError:


  		





  
  25
  
    
    raise Exception("Cannot import settings, make sure PYTHONPATH contains "


  		





  
  26
  
    
                    "the parent directory of the Synnefo Django project.")


  		





  51
  27
  
    

  		





  52
  28
  
    
# A hook runs either in the "pre" or "post" phase of a Ganeti operation.


  		





  53
  29
  
    
# Possible values for the Ganeti operation are "instance-start",


  		












Also available in:
  Unified diff