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#!/usr/bin/python
# vi: ts=4 expandtab
#
# Copyright (C) 2009-2010 Canonical Ltd.
#
# Author: Scott Moser <scott.moser@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 sys
import cloudinit
import logging
def Usage(out = sys.stdout):
out.write("Usage: cloud-init-run-module freq sem-name mod-name [args]\n")
def main():
# expect to be called with
# <freq> <semaphore-name> <module-name> args
if len(sys.argv) < 4:
Usage(sys.stderr)
sys.exit(1)
(freq,semname,modname)=sys.argv[1:4]
run_args=sys.argv[4:]
cloudinit.logging_set_from_cfg_file()
log = logging.getLogger()
log.info("cloud-init-run-module %s" % sys.argv[1:])
cloud = cloudinit.CloudInit()
try:
cloud.get_data_source()
except Exception as e:
fail("Failed to get instance data\n\t%s" % traceback.format_exc(),log)
if cloud.sem_has_run(semname,freq):
msg="%s already ran %s" % (semname,freq)
sys.stderr.write("%s\n" % msg)
log.debug(msg)
sys.exit(0)
try:
mod = __import__('cloudinit.' + modname)
inst = getattr(mod,modname)
except:
fail("Failed to load module cloudinit.%s\n" % modname)
import os
cfg_path = None
cfg_env_name = cloudinit.cfg_env_name
if os.environ.has_key(cfg_env_name):
cfg_path = os.environ[cfg_env_name]
try:
cloud.sem_and_run(semname, freq, inst.run, [run_args,cfg_path,log], False)
except Exception as e:
fail("Execution of %s failed:%s" % (semname,e), log)
sys.exit(0)
def err(msg,log=None):
if log:
log.error(msg)
sys.stderr.write(msg + "\n")
def fail(msg,log=None):
err(msg,log)
sys.exit(1)
if __name__ == '__main__':
main()
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