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#!/usr/bin/python
#
# Fetch and run user-data from EC2
# Copyright 2008 Canonical Ltd.
#
# Original-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 as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# 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
import sys
import tempfile
import urllib
from time import gmtime, strftime
api_ver = '2008-02-01'
metadata = None
def get_user_data():
url = 'http://169.254.169.254/%s/user-data' % api_ver
fp = urllib.urlopen(url)
data = fp.read()
fp.close()
return data
def get_ami_id():
url = 'http://169.254.169.254/%s/meta-data' % api_ver
ami_id = urllib.urlopen('%s/ami-id/' %url).read()
return ami_id
user_data = get_user_data()
amiId = get_ami_id()
filename = '/var/ec2/.already-ran.%s' % amiId
if os.path.exists(filename):
print "ec2-run-user-data already ran for this instance."
sys.exit(0)
else:
if user_data.startswith('#!'):
# run it
(fp, path) = tempfile.mkstemp()
os.write(fp,user_data)
os.close(fp);
os.chmod(path, 0700)
os.system('cp %s /var/ec2/user-data' %(path))
status = os.system('%s' % path)
os.unlink(path)
os.system('touch /var/ec2/$s' %(filename))
sys.exit(0)
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