Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/poll.py", line 115, in wait
    listener.cb(fileno)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 214, in main
    result = function(*args, **kwargs)
  File "/home/dev/toochka/toochka/worker/worker.py", line 87, in createVM
    task_util.update_task(self.db, taskId, status='success', step='', result=instance, complete=True)
  File "/home/dev/toochka/toochka/common/tasks.py", line 55, in update_task
    task = db.update_dict(cur, 'tasks', task, 'id=%s' % task_id, returning='*')
  File "/home/dev/toochka/toochka/common/db.py", line 19, in update_dict
    cur.execute(sql, values)
  File "/usr/local/lib/python2.7/dist-packages/psycopg2/_json.py", line 96, in getquoted
    s = self.dumps(self.adapted)
  File "/usr/local/lib/python2.7/dist-packages/psycopg2/_json.py", line 89, in dumps
    return dumps(obj)
  File "/usr/lib/python2.7/json/__init__.py", line 243, in dumps
    return _default_encoder.encode(obj)
  File "/usr/lib/python2.7/json/encoder.py", line 207, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/lib/python2.7/json/encoder.py", line 270, in iterencode
    return _iterencode(o, 0)
  File "/usr/lib/python2.7/json/encoder.py", line 184, in default
    raise TypeError(repr(o) + " is not JSON serializable")
TypeError: datetime.datetime(2015, 3, 4, 18, 6, 6, 158641, tzinfo=psycopg2.tz.FixedOffsetTimezone(offset=180, name=None)) is not JSON serializable