ansible/service

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#!/usr/bin/python
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible 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.
#
# Ansible 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 Ansible. If not, see <http://www.gnu.org/licenses/>.
try:
import json
except ImportError:
import simplejson as json
import sys
import shlex
import subprocess
# ===========================================
SERVICE = '/sbin/service'
def _run(cmd):
''' :Return: A tuple of ``(returncode, stdout, stderr)`` resulting from executing
`cmd` with the shell. '''
process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
stdout, stderr = process.communicate()
return (process.returncode, stdout, stderr)
argfile = sys.argv[1]
args = open(argfile, 'r').read()
items = shlex.split(args)
if not len(items):
print json.dumps(dict(failed=True, msg='this module requires arguments (-a)'))
sys.exit(1)
params = {}
for arg in items:
if "=" not in arg:
print json.dumps(dict(failed=True, msg='expected arguments of the form name=value'))
sys.exit(1)
(name, value) = arg.split("=")
params[name] = value
name = params['name']
state = params.get('state','unknown')
list_ = params.get('list')
# running and started are the same
if state not in [ 'running', 'started', 'stopped', 'restarted' ]:
print json.dumps(dict(failed=True, msg='invalid state'))
sys.exit(1)
if list_ and list_ not in ('status',):
print json.dumps(dict(failed=True, msg='invalid argument to list'))
sys.exit(1)
# ===========================================
# get service status
rc, stdout, stderr = _run("%s %s status" % (SERVICE, name))
# ===========================================
# determine if we are going to change anything
running = False
if stdout.find("not running") != -1:
running = False
elif stdout.find("running") != -1:
running = True
elif name == 'iptables' and stdout.find("ACCEPT") != -1:
# iptables status command output is lame
# TODO: lookup if we can use a return code for this instead?
running = True
changed = False
if not running and state == "started":
changed = True
elif running and state == "stopped":
changed = True
elif state == "restarted":
changed = True
# ===========================================
# run change commands if we need to
rc = 0
if changed:
if state in ('started', 'running'):
rc, stdout, stderr = _run("%s %s start" % (SERVICE, name))
elif state == 'stopped':
rc, stdout, stderr = _run("%s %s stop" % (SERVICE, name))
elif state == 'restarted':
rc1, stdout1, stderr1 = _run("%s %s stop" % (SERVICE, name))
rc2, stdout2, stderr2 = _run("%s %s start" % (SERVICE, name))
rc = rc1 and rc2
stdout = stdout1 + stdout2
stderr = stderr1 + stderr2
if rc != 0:
print json.dumps({
"failed" : 1,
"rc" : rc,
})
print >> sys.stderr, stdout + stderr
sys.exit(1)
# ===============================================
# success
result = {"changed": changed}
if list_ == 'status':
rc, stdout, stderr = _run("%s %s status" % (SERVICE, name))
result['status'] = stdout
print json.dumps(result)