#!/usr/bin/python # -*- coding: utf-8 -*- # (c) 2016, 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 . DOCUMENTATION = ''' module: systemd author: - "Ansible Core Team" version_added: "2.2" short_description: Manage services. description: - Controls systemd services on remote hosts. options: name: required: true description: - Name of the service. aliases: ['unit', 'service'] state: required: false default: null choices: [ 'started', 'stopped', 'restarted', 'reloaded' ] description: - C(started)/C(stopped) are idempotent actions that will not run commands unless necessary. C(restarted) will always bounce the service. C(reloaded) will always reload. enabled: required: false choices: [ "yes", "no" ] default: null description: - Whether the service should start on boot. B(At least one of state and enabled are required.) masked: required: false choices: [ "yes", "no" ] default: null description: - Whether the unit should be masked or not, a masked unit is impossible to start. daemon_reload: required: false default: no choices: [ "yes", "no" ] description: - run daemon-reload before doing any other operations, to make sure systemd has read any changes. aliases: ['daemon-reload'] user: required: false default: no choices: [ "yes", "no" ] description: - run systemctl talking to the service manager of the calling user, rather than the service manager of the system. notes: - One option other than name is required. requirements: - A system managed by systemd ''' EXAMPLES = ''' # Example action to start service httpd, if not running - systemd: state=started name=httpd # Example action to stop service cron on debian, if running - systemd: name=cron state=stopped # Example action to restart service cron on centos, in all cases, also issue deamon-reload to pick up config changes - systemd: state=restarted daemon_reload=yes name=crond # Example action to reload service httpd, in all cases - systemd: name=httpd state=reloaded # Example action to enable service httpd and ensure it is not masked - systemd: name: httpd enabled: yes masked: no # Example action to enable a timer for dnf-automatic - systemd: name: dnf-automatic.timer state: started enabled: True ''' RETURN = ''' status: description: A dictionary with the key=value pairs returned from `systemctl show` returned: success type: complex sample: { "ActiveEnterTimestamp": "Sun 2016-05-15 18:28:49 EDT", "ActiveEnterTimestampMonotonic": "8135942", "ActiveExitTimestampMonotonic": "0", "ActiveState": "active", "After": "auditd.service systemd-user-sessions.service time-sync.target systemd-journald.socket basic.target system.slice", "AllowIsolate": "no", "Before": "shutdown.target multi-user.target", "BlockIOAccounting": "no", "BlockIOWeight": "1000", "CPUAccounting": "no", "CPUSchedulingPolicy": "0", "CPUSchedulingPriority": "0", "CPUSchedulingResetOnFork": "no", "CPUShares": "1024", "CanIsolate": "no", "CanReload": "yes", "CanStart": "yes", "CanStop": "yes", "CapabilityBoundingSet": "18446744073709551615", "ConditionResult": "yes", "ConditionTimestamp": "Sun 2016-05-15 18:28:49 EDT", "ConditionTimestampMonotonic": "7902742", "Conflicts": "shutdown.target", "ControlGroup": "/system.slice/crond.service", "ControlPID": "0", "DefaultDependencies": "yes", "Delegate": "no", "Description": "Command Scheduler", "DevicePolicy": "auto", "EnvironmentFile": "/etc/sysconfig/crond (ignore_errors=no)", "ExecMainCode": "0", "ExecMainExitTimestampMonotonic": "0", "ExecMainPID": "595", "ExecMainStartTimestamp": "Sun 2016-05-15 18:28:49 EDT", "ExecMainStartTimestampMonotonic": "8134990", "ExecMainStatus": "0", "ExecReload": "{ path=/bin/kill ; argv[]=/bin/kill -HUP $MAINPID ; ignore_errors=no ; start_time=[n/a] ; stop_time=[n/a] ; pid=0 ; code=(null) ; status=0/0 }", "ExecStart": "{ path=/usr/sbin/crond ; argv[]=/usr/sbin/crond -n $CRONDARGS ; ignore_errors=no ; start_time=[n/a] ; stop_time=[n/a] ; pid=0 ; code=(null) ; status=0/0 }", "FragmentPath": "/usr/lib/systemd/system/crond.service", "GuessMainPID": "yes", "IOScheduling": "0", "Id": "crond.service", "IgnoreOnIsolate": "no", "IgnoreOnSnapshot": "no", "IgnoreSIGPIPE": "yes", "InactiveEnterTimestampMonotonic": "0", "InactiveExitTimestamp": "Sun 2016-05-15 18:28:49 EDT", "InactiveExitTimestampMonotonic": "8135942", "JobTimeoutUSec": "0", "KillMode": "process", "KillSignal": "15", "LimitAS": "18446744073709551615", "LimitCORE": "18446744073709551615", "LimitCPU": "18446744073709551615", "LimitDATA": "18446744073709551615", "LimitFSIZE": "18446744073709551615", "LimitLOCKS": "18446744073709551615", "LimitMEMLOCK": "65536", "LimitMSGQUEUE": "819200", "LimitNICE": "0", "LimitNOFILE": "4096", "LimitNPROC": "3902", "LimitRSS": "18446744073709551615", "LimitRTPRIO": "0", "LimitRTTIME": "18446744073709551615", "LimitSIGPENDING": "3902", "LimitSTACK": "18446744073709551615", "LoadState": "loaded", "MainPID": "595", "MemoryAccounting": "no", "MemoryLimit": "18446744073709551615", "MountFlags": "0", "Names": "crond.service", "NeedDaemonReload": "no", "Nice": "0", "NoNewPrivileges": "no", "NonBlocking": "no", "NotifyAccess": "none", "OOMScoreAdjust": "0", "OnFailureIsolate": "no", "PermissionsStartOnly": "no", "PrivateNetwork": "no", "PrivateTmp": "no", "RefuseManualStart": "no", "RefuseManualStop": "no", "RemainAfterExit": "no", "Requires": "basic.target", "Restart": "no", "RestartUSec": "100ms", "Result": "success", "RootDirectoryStartOnly": "no", "SameProcessGroup": "no", "SecureBits": "0", "SendSIGHUP": "no", "SendSIGKILL": "yes", "Slice": "system.slice", "StandardError": "inherit", "StandardInput": "null", "StandardOutput": "journal", "StartLimitAction": "none", "StartLimitBurst": "5", "StartLimitInterval": "10000000", "StatusErrno": "0", "StopWhenUnneeded": "no", "SubState": "running", "SyslogLevelPrefix": "yes", "SyslogPriority": "30", "TTYReset": "no", "TTYVHangup": "no", "TTYVTDisallocate": "no", "TimeoutStartUSec": "1min 30s", "TimeoutStopUSec": "1min 30s", "TimerSlackNSec": "50000", "Transient": "no", "Type": "simple", "UMask": "0022", "UnitFileState": "enabled", "WantedBy": "multi-user.target", "Wants": "system.slice", "WatchdogTimestampMonotonic": "0", "WatchdogUSec": "0", } ''' import os import glob from ansible.module_utils.basic import AnsibleModule from ansible.module_utils._text import to_bytes, to_native # =========================================== # Main control flow def main(): # init module = AnsibleModule( argument_spec = dict( name = dict(required=True, type='str', aliases=['unit', 'service']), state = dict(choices=[ 'started', 'stopped', 'restarted', 'reloaded'], type='str'), enabled = dict(type='bool'), masked = dict(type='bool'), daemon_reload= dict(type='bool', default=False, aliases=['daemon-reload']), user= dict(type='bool', default=False), ), supports_check_mode=True, required_one_of=[['state', 'enabled', 'masked', 'daemon_reload']], ) # initialize systemctl = module.get_bin_path('systemctl') if module.params['user']: systemctl = systemctl + " --user" unit = module.params['name'] rc = 0 out = err = '' result = { 'name': unit, 'changed': False, 'status': {}, } # Run daemon-reload first, if requested if module.params['daemon_reload']: (rc, out, err) = module.run_command("%s daemon-reload" % (systemctl)) if rc != 0: module.fail_json(msg='failure %d during daemon-reload: %s' % (rc, err)) #TODO: check if service exists (rc, out, err) = module.run_command("%s show '%s'" % (systemctl, unit)) if rc != 0: module.fail_json(msg='failure %d running systemctl show for %r: %s' % (rc, unit, err)) # load return of systemctl show into dictionary for easy access and return k = None multival = [] for line in to_native(out).split('\n'): # systemd can have multiline values delimited with {} if line.strip(): if k is None: if '=' in line: k,v = line.split('=', 1) if v.lstrip().startswith('{'): if not v.rstrip().endswith('}'): multival.append(line) continue result['status'][k] = v.strip() k = None else: if line.rstrip().endswith('}'): result['status'][k] = '\n'.join(multival).strip() multival = [] k = None else: multival.append(line) if 'LoadState' in result['status'] and result['status']['LoadState'] == 'not-found': module.fail_json(msg='Could not find the requested service "%r": %s' % (unit, err)) elif 'LoadError' in result['status']: module.fail_json(msg="Failed to get the service status '%s': %s" % (unit, result['status']['LoadError'])) # mask/unmask the service, if requested if module.params['masked'] is not None: masked = (result['status']['LoadState'] == 'masked') # Change? if masked != module.params['masked']: result['changed'] = True if module.params['masked']: action = 'mask' else: action = 'unmask' if not module.check_mode: (rc, out, err) = module.run_command("%s %s '%s'" % (systemctl, action, unit)) if rc != 0: module.fail_json(msg="Unable to %s service %s: %s" % (action, unit, err)) # Enable/disable service startup at boot if requested if module.params['enabled'] is not None: # do we need to enable the service? enabled = False (rc, out, err) = module.run_command("%s is-enabled '%s'" % (systemctl, unit)) # check systemctl result or if it is a init script if rc == 0: enabled = True elif rc == 1: # Deals with init scripts # if both init script and unit file exist stdout should have enabled/disabled, otherwise use rc entries initscript = '/etc/init.d/' + unit if os.path.exists(initscript) and os.access(initscript, os.X_OK) and \ (not out.startswith('disabled') or bool(glob.glob('/etc/rc?.d/S??' + unit))): enabled = True # default to current state result['enabled'] = enabled # Change enable/disable if needed if enabled != module.params['enabled']: result['changed'] = True if module.params['enabled']: action = 'enable' else: action = 'disable' if not module.check_mode: (rc, out, err) = module.run_command("%s %s '%s'" % (systemctl, action, unit)) if rc != 0: module.fail_json(msg="Unable to %s service %s: %s" % (action, unit, err)) result['enabled'] = not enabled if module.params['state'] is not None: # default to desired state result['state'] = module.params['state'] # What is current service state? if 'ActiveState' in result['status']: action = None if module.params['state'] == 'started': if result['status']['ActiveState'] != 'active': action = 'start' result['changed'] = True elif module.params['state'] == 'stopped': if result['status']['ActiveState'] == 'active': action = 'stop' result['changed'] = True else: action = module.params['state'][:-2] # remove 'ed' from restarted/reloaded result['state'] = 'started' result['changed'] = True if action: if not module.check_mode: (rc, out, err) = module.run_command("%s %s '%s'" % (systemctl, action, unit)) if rc != 0: module.fail_json(msg="Unable to %s service %s: %s" % (action, unit, err)) else: # this should not happen? module.fail_json(msg="Service is in unknown state", status=result['status']) module.exit_json(**result) if __name__ == '__main__': main()