#!/usr/bin/python # (c) 2012, Michael DeHaan # # 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 . SERVICE = None CHKCONFIG = None def _find_binaries(m): # list of possible paths for service/chkconfig binaries # with the most probable first global CHKCONFIG global SERVICE global INITCTL paths = ['/sbin', '/usr/sbin', '/bin', '/usr/bin'] binaries = [ 'service', 'chkconfig', 'update-rc.d', 'initctl'] location = dict() for binary in binaries: location[binary] = None for binary in binaries: for path in paths: if os.path.exists(path + '/' + binary): location[binary] = path + '/' + binary break if location.get('chkconfig', None): CHKCONFIG = location['chkconfig'] elif location.get('update-rc.d', None): CHKCONFIG = location['update-rc.d'] else: m.fail_json(msg='unable to find chkconfig or update-rc.d binary') if location.get('service', None): SERVICE = location['service'] else: m.fail_json(msg='unable to find service binary') if location.get('initctl', None): INITCTL = location['initctl'] else: INITCTL = None def _get_service_status(name): rc, status_stdout, status_stderr = _run("%s %s status" % (SERVICE, name)) # set the running state to None because we don't know it yet running = None # Check if we got upstart on the system and then the job state if INITCTL != None: # check the job status by upstart response initctl_rc, initctl_status_stdout, initctl_status_stderr = _run("%s status %s" % (INITCTL, name)) if initctl_status_stdout.find("stop/waiting") != -1: running = False elif initctl_status_stdout.find("start/running") != -1: running = True # if the job status is still not known check it by response code if running == None: if rc == 3: running = False elif rc == 0: running = True # if the job status is still not known check it by status output keywords if running == None: # first tranform the status output that could irritate keyword matching cleanout = status_stdout.lower().replace(name.lower(), '') if "stop" in cleanout: running = False elif "run" in cleanout and "not" in cleanout: running = False elif "run" in cleanout and "not" not in cleanout: running = True elif "start" in cleanout and "not" not in cleanout: running = True elif 'could not access pid file' in cleanout: running = False elif 'is dead and pid file exists' in cleanout: running = False # if the job status is still not known check it by special conditions if running == None: if name == 'iptables' and status_stdout.find("ACCEPT") != -1: # iptables status command output is lame # TODO: lookup if we can use a return code for this instead? running = True return running def _run(cmd): # returns (rc, stdout, stderr) from shell command process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True) stdout, stderr = process.communicate() return (process.returncode, stdout, stderr) def _do_enable(name, enable): # we change argument depending on real binary used # update-rc.d wants enable/disable while # chkconfig wants on/off valid_argument = dict({'on' : 'on', 'off' : 'off'}) if CHKCONFIG.endswith("update-rc.d"): valid_argument['on'] = "enable" valid_argument['off'] = "disable" if enable.lower() in ['on', 'true', 'yes', 'enable']: rc, stdout, stderr = _run("%s %s %s" % (CHKCONFIG, name, valid_argument['on'])) elif enable.lower() in ['off', 'false', 'no', 'disable']: rc, stdout, stderr = _run("%s %s %s" % (CHKCONFIG, name, valid_argument['off'])) return rc, stdout, stderr def main(): module = AnsibleModule( argument_spec = dict( name = dict(required=True), state = dict(choices=['running', 'started', 'stopped', 'restarted', 'reloaded']), enable = dict(choices=BOOLEANS) ) ) p = module.params name = p['name'] state = p.get('state', None) enable = module.bool(p.get('enable', None)) # =========================================== # find binaries locations on minion _find_binaries(module) # =========================================== # get service status running = _get_service_status(name) # =========================================== # Some common variables changed = False rc = 0 err = '' out = '' if enable: rc_enable, out_enable, err_enable = _do_enable(name, enable) rc += rc_enable out += out_enable err += err_enable if state and running == None: module.fail_json(msg="failed determining the current service state => state stays unchanged", changed=False) elif state: # a state change command has been requested # =========================================== # determine if we are going to change anything if not running and state in ["started", "running"]: changed = True elif running and state in ["stopped","reloaded"]: changed = True elif state == "restarted": changed = True # =========================================== # run change commands if we need to if changed: if state in ['started', 'running']: rc_state, stdout, stderr = _run("%s %s start" % (SERVICE, name)) elif state == 'stopped': rc_state, stdout, stderr = _run("%s %s stop" % (SERVICE, name)) elif state == 'reloaded': rc_state, stdout, stderr = _run("%s %s reload" % (SERVICE, name)) elif state == 'restarted': rc1, stdout1, stderr1 = _run("%s %s stop" % (SERVICE, name)) rc2, stdout2, stderr2 = _run("%s %s start" % (SERVICE, name)) rc_state = rc + rc1 + rc2 stdout = stdout1 + stdout2 stderr = stderr1 + stderr2 out += stdout err += stderr rc = rc + rc_state if rc != 0: module.fail_json(msg=err) result = {"changed": changed} rc, stdout, stderr = _run("%s %s status" % (SERVICE, name)) module.exit_json(**result); # this is magic, see lib/ansible/module_common.py #<> main()