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#
# Common code for the EC2 initialisation scripts in Ubuntu
# Copyright (C) 2008-2009 Canonical Ltd
#
# Author: Soren Hansen <soren@canonical.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import os
from configobj import ConfigObj
import boto.utils
cachedir = '/var/lib/cloud/data/cache'
import DataSourceEc2
class EC2Init:
datasource_list = [ DataSourceEc2.DataSourceEc2 ]
def restore_from_cache(self):
try:
f=open(cachedir + "/obj.pkl", "rb")
data = pickle.load(f)
self.datasource = data
return True
except:
return False
def write_to_cache(self):
try:
f=open(cachedir + "/obj.pkl", "wb")
data = pickle.dump(self.datasource,f)
return True
except:
return False
def get_data_source(self):
if self.restore_from_cache():
return True
for source in self.datasource_list:
try:
print "trying + %s" % source
s = source()
if s.get_data():
self.datasource = s
return
except:
pass
raise Exception("Could not find data source")
def get_user_data(self):
return(self.datasource.get_user_data())
def get_cfg_option_bool(self, key, default=None):
val = self.config.get(key, default)
if val.lower() in ['1', 'on', 'yes']:
return True
return False
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