281 lines
8.9 KiB
Python
Executable file
281 lines
8.9 KiB
Python
Executable file
#!/usr/bin/python
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# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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try:
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import json
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except ImportError:
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import simplejson as json
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import sys
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import shlex
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import subprocess
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import os.path
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import syslog
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# TODO: switch to fail_json and other helper functions
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# like other modules are using
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# ===========================================
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SERVICE = None
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CHKCONFIG = None
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def fail_json(d):
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print json.dumps(d)
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sys.exit(1)
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def _find_binaries():
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# list of possible paths for service/chkconfig binaries
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# with the most probable first
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global CHKCONFIG
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global SERVICE
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global INITCTL
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paths = ['/sbin', '/usr/sbin', '/bin', '/usr/bin']
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binaries = [ 'service', 'chkconfig', 'update-rc.d', 'initctl']
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location = dict()
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for binary in binaries:
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location[binary] = None
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for binary in binaries:
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for path in paths:
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if os.path.exists(path + '/' + binary):
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location[binary] = path + '/' + binary
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break
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if location.get('chkconfig', None):
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CHKCONFIG = location['chkconfig']
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elif location.get('update-rc.d', None):
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CHKCONFIG = location['update-rc.d']
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else:
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fail_json(dict(failed=True, msg='unable to find chkconfig or update-rc.d binary'))
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if location.get('service', None):
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SERVICE = location['service']
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else:
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fail_json(dict(failed=True, msg='unable to find service binary'))
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if location.get('initctl', None):
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INITCTL = location['initctl']
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else:
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INITCTL = None
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def _get_service_status(name):
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rc, status_stdout, status_stderr = _run("%s %s status" % (SERVICE, name))
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status = status_stdout + status_stderr
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# set the running state to None because we don't know it yet
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running = None
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# Check if we got upstart on the system and then the job state
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if INITCTL != None:
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# check the job status by upstart response
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initctl_rc, initctl_status_stdout, initctl_status_stderr = _run("%s status %s" % (INITCTL, name))
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if initctl_status_stdout.find("stop/waiting") != -1:
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running = False
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elif initctl_status_stdout.find("start/running") != -1:
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running = True
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# if the job status is still not known check it by response code
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if running == None:
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if rc == 3:
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running = False
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elif rc == 0:
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running = True
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# if the job status is still not known check it by status output keywords
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if running == None:
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# first tranform the status output that could irritate keyword matching
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cleaned_status_stdout = status_stdout.lower().replace(name.lower(),'')
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if cleaned_status_stdout.find("stop") != -1:
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running = False
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elif cleaned_status_stdout.find("run") != -1 and cleaned_status_stdout.find("not") != -1:
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running = False
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elif cleaned_status_stdout.find("run") != -1 and cleaned_status_stdout.find("not") == -1:
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running = True
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elif cleaned_status_stdout.find("start") != -1 and cleaned_status_stdout.find("not") == -1:
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running = True
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elif 'could not access pid file' in cleaned_status_stdout:
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running = False
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# if the job status is still not known check it by special conditions
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if running == None:
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if name == 'iptables' and status_stdout.find("ACCEPT") != -1:
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# iptables status command output is lame
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# TODO: lookup if we can use a return code for this instead?
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running = True
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return running
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def _run(cmd):
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# returns (rc, stdout, stderr) from shell command
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process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
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stdout, stderr = process.communicate()
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return (process.returncode, stdout, stderr)
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def _do_enable(name, enable):
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# we change argument depending on real binary used
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# update-rc.d wants enable/disable while
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# chkconfig wants on/off
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valid_argument = dict({'on' : 'on', 'off' : 'off'})
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if CHKCONFIG.endswith("update-rc.d"):
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valid_argument['on'] = "enable"
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valid_argument['off'] = "disable"
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if enable.lower() in ['on', 'true', 'yes', 'enable']:
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rc, stdout, stderr = _run("%s %s %s" % (CHKCONFIG, name, valid_argument['on']))
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elif enable.lower() in ['off', 'false', 'no', 'disable']:
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rc, stdout, stderr = _run("%s %s %s" % (CHKCONFIG, name, valid_argument['off']))
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return rc, stdout, stderr
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argfile = sys.argv[1]
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args = open(argfile, 'r').read()
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items = shlex.split(args)
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syslog.openlog('ansible-%s' % os.path.basename(__file__))
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syslog.syslog(syslog.LOG_NOTICE, 'Invoked with %s' % args)
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if not len(items):
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fail_json(dict(failed=True, msg='this module requires arguments (-a)'))
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params = {}
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for arg in items:
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if "=" not in arg:
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fail_json(dict(failed=True, msg='expected key=value format arguments'))
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(name, value) = arg.split("=")
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params[name] = value
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name = params.get('name', None)
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if name is None:
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fail_json(dict(failed=True, msg='missing name'))
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state = params.get('state', None)
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list_items = params.get('list', None)
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enable = params.get('enabled', params.get('enable', None))
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# running and started are the same
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if state and state.lower() not in [ 'running', 'started', 'stopped', 'restarted','reloaded' ]:
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fail_json(dict(failed=True, msg='invalid value for state'))
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if list_items and list_items.lower() not in [ 'status' ]:
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fail_json(dict(failed=True, msg='invalid value for list'))
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if enable and enable.lower() not in [ 'on', 'off', 'true', 'false', 'yes', 'no', 'enable', 'disable' ]:
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fail_json(dict(failed=True, msg='invalid value for enable'))
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# ===========================================
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# find binaries locations on minion
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_find_binaries()
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# ===========================================
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# get service status
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running = _get_service_status(name)
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if state or enable:
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rc = 0
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out = ''
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err = ''
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changed = False
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if enable:
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rc_enable, out_enable, err_enable = _do_enable(name, enable)
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rc += rc_enable
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out += out_enable
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err += err_enable
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if state and running == None:
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print json.dumps({
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"failed" : True,
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"msg" : "failed determining the current service state => state stays unchanged",
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})
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print >> sys.stderr, out + err
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elif state:
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# a state change command has been requested
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# ===========================================
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# determine if we are going to change anything
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if not running and state in ("started", "running"):
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changed = True
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elif running and state in ("stopped","reloaded"):
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changed = True
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elif state == "restarted":
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changed = True
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# ===========================================
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# run change commands if we need to
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if changed:
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if state in ('started', 'running'):
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rc_state, stdout, stderr = _run("%s %s start" % (SERVICE, name))
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elif state == 'stopped':
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rc_state, stdout, stderr = _run("%s %s stop" % (SERVICE, name))
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elif state == 'reloaded':
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rc_state, stdout, stderr = _run("%s %s reload" % (SERVICE, name))
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elif state == 'restarted':
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rc1, stdout1, stderr1 = _run("%s %s stop" % (SERVICE, name))
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rc2, stdout2, stderr2 = _run("%s %s start" % (SERVICE, name))
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rc_state = rc + rc1 + rc2
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stdout = stdout1 + stdout2
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stderr = stderr1 + stderr2
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out += stdout
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err += stderr
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rc = rc + rc_state
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if rc != 0:
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print json.dumps({
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"failed" : 1,
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"rc" : rc,
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})
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print >> sys.stderr, out + err
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sys.exit(1)
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# ===============================================
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# success
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result = {"changed": changed}
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rc, stdout, stderr = _run("%s %s status" % (SERVICE, name))
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if list_items and list_items in [ 'status' ]:
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result['status'] = stdout
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print json.dumps(result)
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elif list_items is not None:
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# solo list=status mode, don't change anything, just return
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# suitable for /usr/bin/ansible usage or API, playbooks
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# not so much
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print json.dumps({
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"status" : status
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})
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else:
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print json.dumps(dict(failed=True, msg="expected state or list parameters"))
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sys.exit(0)
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