#!/usr/bin/python # -*- coding: utf-8 -*- # # (c) 2015, Brian Coca # # 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 ANSIBLE_METADATA = {'metadata_version': '1.0', 'status': ['stableinterface'], 'supported_by': 'community'} # This is a modification of @bcoca's `svc` module DOCUMENTATION = ''' --- module: runit author: "James Sumners (@jsumners)" version_added: "2.3" short_description: Manage runit services. description: - Controls runit services on remote hosts using the sv utility. options: name: required: true description: - Name of the service to manage. state: required: false choices: [ started, stopped, restarted, killed, reloaded, once ] description: - C(started)/C(stopped) are idempotent actions that will not run commands unless necessary. C(restarted) will always bounce the service (sv restart) and C(killed) will always bounce the service (sv force-stop). C(reloaded) will send a HUP (sv reload). C(once) will run a normally downed sv once (sv once), not really an idempotent operation. enabled: required: false choices: [ "yes", "no" ] description: - Wheater the service is enabled or not, if disabled it also implies stopped. service_dir: required: false default: /var/service description: - directory runsv watches for services service_src: required: false default: /etc/sv description: - directory where services are defined, the source of symlinks to service_dir. ''' EXAMPLES = ''' # Example action to start sv dnscache, if not running - runit: name: dnscache state: started # Example action to stop sv dnscache, if running - runit: name: dnscache state: stopped # Example action to kill sv dnscache, in all cases - runit: name: dnscache state: killed # Example action to restart sv dnscache, in all cases - runit: name: dnscache state: restarted # Example action to reload sv dnscache, in all cases - runit: name: dnscache state: reloaded # Example using alt sv directory location - runit: name: dnscache state: reloaded service_dir: /run/service ''' import platform import shlex from ansible.module_utils.pycompat24 import get_exception from ansible.module_utils.basic import * def _load_dist_subclass(cls, *args, **kwargs): ''' Used for derivative implementations ''' subclass = None distro = kwargs['module'].params['distro'] # get the most specific superclass for this platform if distro is not None: for sc in cls.__subclasses__(): if sc.distro is not None and sc.distro == distro: subclass = sc if subclass is None: subclass = cls return super(cls, subclass).__new__(subclass) class Sv(object): """ Main class that handles daemontools, can be subclassed and overridden in case we want to use a 'derivative' like encore, s6, etc """ #def __new__(cls, *args, **kwargs): # return _load_dist_subclass(cls, args, kwargs) def __init__(self, module): self.extra_paths = [ ] self.report_vars = ['state', 'enabled', 'svc_full', 'src_full', 'pid', 'duration', 'full_state'] self.module = module self.name = module.params['name'] self.service_dir = module.params['service_dir'] self.service_src = module.params['service_src'] self.enabled = None self.full_state = None self.state = None self.pid = None self.duration = None self.svc_cmd = module.get_bin_path('sv', opt_dirs=self.extra_paths) self.svstat_cmd = module.get_bin_path('sv', opt_dirs=self.extra_paths) self.svc_full = '/'.join([ self.service_dir, self.name ]) self.src_full = '/'.join([ self.service_src, self.name ]) self.enabled = os.path.lexists(self.svc_full) if self.enabled: self.get_status() else: self.state = 'stopped' def enable(self): if os.path.exists(self.src_full): try: os.symlink(self.src_full, self.svc_full) except OSError: e = get_exception() self.module.fail_json(path=self.src_full, msg='Error while linking: %s' % str(e)) else: self.module.fail_json(msg="Could not find source for service to enable (%s)." % self.src_full) def disable(self): self.execute_command([self.svc_cmd,'force-stop',self.src_full]) try: os.unlink(self.svc_full) except OSError: e = get_exception() self.module.fail_json(path=self.svc_full, msg='Error while unlinking: %s' % str(e)) def get_status(self): (rc, out, err) = self.execute_command([self.svstat_cmd, 'status', self.svc_full]) if err is not None and err: self.full_state = self.state = err else: self.full_state = out m = re.search('\(pid (\d+)\)', out) if m: self.pid = m.group(1) m = re.search(' (\d+)s', out) if m: self.duration = m.group(1) if re.search('run:', out): self.state = 'started' elif re.search('down:', out): self.state = 'stopped' else: self.state = 'unknown' return def started(self): return self.start() def start(self): return self.execute_command([self.svc_cmd, 'start', self.svc_full]) def stopped(self): return self.stop() def stop(self): return self.execute_command([self.svc_cmd, 'stop', self.svc_full]) def once(self): return self.execute_command([self.svc_cmd, 'once', self.svc_full]) def reloaded(self): return self.reload() def reload(self): return self.execute_command([self.svc_cmd, 'reload', self.svc_full]) def restarted(self): return self.restart() def restart(self): return self.execute_command([self.svc_cmd, 'restart', self.svc_full]) def killed(self): return self.kill() def kill(self): return self.execute_command([self.svc_cmd, 'force-stop', self.svc_full]) def execute_command(self, cmd): try: (rc, out, err) = self.module.run_command(' '.join(cmd)) except Exception: e = get_exception() self.module.fail_json(msg="failed to execute: %s" % str(e)) return (rc, out, err) def report(self): self.get_status() states = {} for k in self.report_vars: states[k] = self.__dict__[k] return states # =========================================== # Main control flow def main(): module = AnsibleModule( argument_spec = dict( name = dict(required=True), state = dict(choices=['started', 'stopped', 'restarted', 'killed', 'reloaded', 'once']), enabled = dict(required=False, type='bool'), dist = dict(required=False, default='runit'), service_dir = dict(required=False, default='/var/service'), service_src = dict(required=False, default='/etc/sv'), ), supports_check_mode=True, ) module.run_command_environ_update = dict(LANG='C', LC_ALL='C', LC_MESSAGES='C', LC_CTYPE='C') state = module.params['state'] enabled = module.params['enabled'] sv = Sv(module) changed = False orig_state = sv.report() if enabled is not None and enabled != sv.enabled: changed = True if not module.check_mode: try: if enabled: sv.enable() else: sv.disable() except (OSError, IOError): e = get_exception() module.fail_json(msg="Could not change service link: %s" % str(e)) if state is not None and state != sv.state: changed = True if not module.check_mode: getattr(sv,state)() module.exit_json(changed=changed, sv=sv.report()) if __name__ == '__main__': main()