Several systemd fixes
Allow some operations on missing services Better sysv handling Rearranged error reporting fixed load error catching and order logic also minor doc/comment updates added warnings
This commit is contained in:
Brian Coca
Matt Clay
parent
7079fe41be
commit
44c07d7ca8
1 changed files with 59 additions and 50 deletions
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@ -72,14 +72,10 @@ requirements:
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EXAMPLES = '''
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# Example action to start service httpd, if not running
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- systemd:
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state: started
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name: httpd
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- systemd: state=started name=httpd
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# Example action to stop service cron on debian, if running
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- systemd:
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name: cron
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state: stopped
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- systemd: name=cron state=stopped
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# Example action to restart service cron on centos, in all cases, also issue daemon-reload to pick up config changes
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- systemd:
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@ -235,16 +231,15 @@ status:
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}
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'''
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import os
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import glob
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from ansible.module_utils.basic import AnsibleModule
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from ansible.module_utils._text import to_bytes, to_native
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from ansible.module_utils.service import sysv_exists, sysv_is_enabled, fail_if_missing
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from ansible.module_utils._text import to_native
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# ===========================================
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# Main control flow
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def main():
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# init
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# initialize
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module = AnsibleModule(
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argument_spec = dict(
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name = dict(required=True, type='str', aliases=['unit', 'service']),
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@ -258,7 +253,6 @@ def main():
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required_one_of=[['state', 'enabled', 'masked', 'daemon_reload']],
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)
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# initialize
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systemctl = module.get_bin_path('systemctl')
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if module.params['user']:
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systemctl = systemctl + " --user"
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@ -269,6 +263,7 @@ def main():
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'name': unit,
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'changed': False,
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'status': {},
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'warnings': [],
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}
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# Run daemon-reload first, if requested
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@ -277,44 +272,55 @@ def main():
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if rc != 0:
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module.fail_json(msg='failure %d during daemon-reload: %s' % (rc, err))
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#TODO: check if service exists
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# check service data
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(rc, out, err) = module.run_command("%s show '%s'" % (systemctl, unit))
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if rc != 0:
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module.fail_json(msg='failure %d running systemctl show for %r: %s' % (rc, unit, err))
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found = False
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is_initd = sysv_exists(unit)
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is_systemd = False
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# load return of systemctl show into dictionary for easy access and return
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k = None
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multival = []
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for line in to_native(out).split('\n'): # systemd can have multiline values delimited with {}
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if line.strip():
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if k is None:
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if '=' in line:
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k,v = line.split('=', 1)
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if v.lstrip().startswith('{'):
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if not v.rstrip().endswith('}'):
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multival.append(line)
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continue
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result['status'][k] = v.strip()
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k = None
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else:
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if line.rstrip().endswith('}'):
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result['status'][k] = '\n'.join(multival).strip()
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multival = []
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k = None
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if out:
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k = None
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for line in to_native(out).split('\n'): # systemd can have multiline values delimited with {}
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if line.strip():
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if k is None:
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if '=' in line:
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k,v = line.split('=', 1)
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if v.lstrip().startswith('{'):
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if not v.rstrip().endswith('}'):
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multival.append(line)
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continue
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result['status'][k] = v.strip()
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k = None
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else:
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multival.append(line)
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if line.rstrip().endswith('}'):
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result['status'][k] = '\n'.join(multival).strip()
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multival = []
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k = None
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else:
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multival.append(line)
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is_systemd = 'LoadState' in result['status'] and result['status']['LoadState'] != 'not-found'
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# Check for loading error
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if is_systemd and 'LoadError' in result['status']:
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module.fail_json(msg="Error loading unit file '%s': %s" % (unit, result['status']['LoadError']))
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if 'LoadState' in result['status'] and result['status']['LoadState'] == 'not-found':
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module.fail_json(msg='Could not find the requested service "%r": %s' % (unit, err))
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elif 'LoadError' in result['status']:
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module.fail_json(msg="Failed to get the service status '%s': %s" % (unit, result['status']['LoadError']))
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# Does service exist?
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found = is_systemd or is_initd
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if is_initd and not is_systemd:
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result['warnings'].append('The service (%s) is actually an init script but the system is managed by systemd' % unit)
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# mask/unmask the service, if requested
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# mask/unmask the service, if requested, can operate on services before they are installed
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if module.params['masked'] is not None:
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masked = (result['status']['LoadState'] == 'masked')
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# state is not masked unless systemd affirms otherwise
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masked = ('LoadState' in result['status'] and result['status']['LoadState'] == 'masked')
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# Change?
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if masked != module.params['masked']:
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result['changed'] = True
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if module.params['masked']:
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@ -325,10 +331,21 @@ def main():
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if not module.check_mode:
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(rc, out, err) = module.run_command("%s %s '%s'" % (systemctl, action, unit))
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if rc != 0:
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# some versions of system CAN mask/unmask non existing services, we only fail on missing if they don't
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fail_if_missing(module, found, unit, "cannot %s" % (action))
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module.fail_json(msg="Unable to %s service %s: %s" % (action, unit, err))
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# Enable/disable service startup at boot if requested
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if module.params['enabled'] is not None:
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if module.params['enabled']:
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action = 'enable'
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else:
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action = 'disable'
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fail_if_missing(module, found, unit, "cannot %s" % (action))
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# do we need to enable the service?
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enabled = False
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(rc, out, err) = module.run_command("%s is-enabled '%s'" % (systemctl, unit))
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@ -337,11 +354,8 @@ def main():
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if rc == 0:
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enabled = True
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elif rc == 1:
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# Deals with init scripts
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# if both init script and unit file exist stdout should have enabled/disabled, otherwise use rc entries
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initscript = '/etc/init.d/' + unit
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if os.path.exists(initscript) and os.access(initscript, os.X_OK) and \
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(not out.startswith('disabled') or bool(glob.glob('/etc/rc?.d/S??' + unit))):
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if is_initd and (not out.startswith('disabled') or sysv_is_enabled(unit)):
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enabled = True
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# default to current state
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@ -350,19 +364,16 @@ def main():
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# Change enable/disable if needed
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if enabled != module.params['enabled']:
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result['changed'] = True
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if module.params['enabled']:
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action = 'enable'
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else:
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action = 'disable'
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if not module.check_mode:
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(rc, out, err) = module.run_command("%s %s '%s'" % (systemctl, action, unit))
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if rc != 0:
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module.fail_json(msg="Unable to %s service %s: %s" % (action, unit, err))
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module.fail_json(msg="Unable to %s service %s: %s" % (action, unit, out + err))
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result['enabled'] = not enabled
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# set service state if requested
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if module.params['state'] is not None:
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fail_if_missing(module, found, unit, "cannot check nor set state")
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# default to desired state
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result['state'] = module.params['state']
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@ -373,17 +384,15 @@ def main():
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if module.params['state'] == 'started':
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if result['status']['ActiveState'] != 'active':
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action = 'start'
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result['changed'] = True
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elif module.params['state'] == 'stopped':
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if result['status']['ActiveState'] == 'active':
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action = 'stop'
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result['changed'] = True
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else:
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action = module.params['state'][:-2] # remove 'ed' from restarted/reloaded
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result['state'] = 'started'
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result['changed'] = True
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if action:
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result['changed'] = True
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if not module.check_mode:
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(rc, out, err) = module.run_command("%s %s '%s'" % (systemctl, action, unit))
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if rc != 0:
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