ansible/library/supervisorctl

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2012, Matt Wright <matt@nobien.net>
#
# 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 <http://www.gnu.org/licenses/>.
#
DOCUMENTATION = '''
---
module: supervisorctl
short_description: Manage the state of a program or group of programs running via Supervisord
description:
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- Manage the state of a program or group of programs running via I(Supervisord)
version_added: "0.7"
options:
name:
description:
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- The name of the I(supervisord) program/process to manage
required: true
default: null
state:
description:
- The state of service
required: true
default: null
choices: [ "present", "started", "stopped", "restarted" ]
examples:
- code: "supervisorctl: name=my_app state=started"
description: Manage the state of program I(my_app) to be in I(started) state.
requirements: [ ]
author: Matt Wright
'''
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def _is_present(name, supervisorctl):
rc, out, err = _run('%s status' % supervisorctl)
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return name in out
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def _is_running(name, supervisorctl):
rc, out, err = _run('%s status %s' % (supervisorctl, name))
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return 'RUNNING' in out
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 main():
arg_spec = dict(
name=dict(required=True),
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state=dict(required=True, choices=['present', 'started', 'restarted', 'stopped'])
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)
module = AnsibleModule(argument_spec=arg_spec)
name = module.params['name']
state = module.params['state']
SUPERVISORCTL = module.get_bin_path('supervisorctl', True)
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present = _is_present(name, SUPERVISORCTL)
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if state == 'present':
if not present:
_run('%s reread' % SUPERVISORCTL)
rc, out, err = _run('%s add %s' % (SUPERVISORCTL, name))
if '%s: added process group' % name in out:
module.exit_json(changed=True, name=name, state=state)
else:
module.fail_json(msg=out, name=name, state=state)
module.exit_json(changed=False, name=name, state=state)
running = _is_running(name, SUPERVISORCTL)
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if running and state == 'started':
module.exit_json(changed=False, name=name, state=state)
if running and state == 'stopped':
rc, out, err = _run('%s stop %s' % (SUPERVISORCTL, name))
if '%s: stopped' % name in out:
module.exit_json(changed=True, name=name, state=state)
module.fail_json(msg=out)
elif running and state == 'restarted':
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rc, out, err = _run('%s update %s' % (SUPERVISORCTL, name))
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rc, out, err = _run('%s restart %s' % (SUPERVISORCTL, name))
if '%s: stopped' % name in out and '%s: started' % name in out:
module.exit_json(changed=True, name=name, state=state)
module.fail_json(msg=out)
elif not running and state == 'started':
rc, out, err = _run('%s start %s' % (SUPERVISORCTL, name))
if '%s: started' % name in out:
module.exit_json(changed=True, name=name, state=state)
module.fail_json(msg=out)
elif not running and state == 'restarted':
module.fail_json(msg='Could not restart `%s` because it is not running' % name)
module.exit_json(changed=False, name=name, state=state)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()