mirror of
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214 lines
7.5 KiB
Python
214 lines
7.5 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2013, Darryl Stoflet <stoflet@gmail.com>
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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from __future__ import absolute_import, division, print_function
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__metaclass__ = type
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ANSIBLE_METADATA = {'metadata_version': '1.1',
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'status': ['preview'],
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'supported_by': 'community'}
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DOCUMENTATION = '''
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---
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module: monit
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short_description: Manage the state of a program monitored via Monit
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description:
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- Manage the state of a program monitored via I(Monit)
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version_added: "1.2"
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options:
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name:
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description:
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- The name of the I(monit) program/process to manage
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required: true
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state:
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description:
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- The state of service
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required: true
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choices: [ "present", "started", "stopped", "restarted", "monitored", "unmonitored", "reloaded" ]
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timeout:
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description:
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- If there are pending actions for the service monitored by monit, then Ansible will check
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for up to this many seconds to verify the requested action has been performed.
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Ansible will sleep for five seconds between each check.
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default: 300
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version_added: "2.1"
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author: "Darryl Stoflet (@dstoflet)"
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'''
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EXAMPLES = '''
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# Manage the state of program "httpd" to be in "started" state.
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- monit:
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name: httpd
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state: started
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'''
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import time
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import re
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from ansible.module_utils.basic import AnsibleModule
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def main():
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arg_spec = dict(
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name=dict(required=True),
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timeout=dict(default=300, type='int'),
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state=dict(required=True, choices=['present', 'started', 'restarted', 'stopped', 'monitored', 'unmonitored', 'reloaded'])
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)
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module = AnsibleModule(argument_spec=arg_spec, supports_check_mode=True)
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name = module.params['name']
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state = module.params['state']
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timeout = module.params['timeout']
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MONIT = module.get_bin_path('monit', True)
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def monit_version():
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rc, out, err = module.run_command('%s -V' % MONIT, check_rc=True)
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version_line = out.split('\n')[0]
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version = re.search(r"[0-9]+\.[0-9]+", version_line).group().split('.')
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# Use only major and minor even if there are more these should be enough
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return int(version[0]), int(version[1])
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def is_version_higher_than_5_18():
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return (MONIT_MAJOR_VERSION, MONIT_MINOR_VERSION) > (5, 18)
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def parse(parts):
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if is_version_higher_than_5_18():
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return parse_current(parts)
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else:
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return parse_older_versions(parts)
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def parse_older_versions(parts):
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if len(parts) > 2 and parts[0].lower() == 'process' and parts[1] == "'%s'" % name:
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return ' '.join(parts[2:]).lower()
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else:
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return ''
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def parse_current(parts):
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if len(parts) > 2 and parts[2].lower() == 'process' and parts[0] == name:
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return ''.join(parts[1]).lower()
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else:
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return ''
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def get_status():
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"""Return the status of the process in monit, or the empty string if not present."""
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rc, out, err = module.run_command('%s %s' % (MONIT, SUMMARY_COMMAND), check_rc=True)
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for line in out.split('\n'):
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# Sample output lines:
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# Process 'name' Running
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# Process 'name' Running - restart pending
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parts = parse(line.split())
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if parts != '':
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return parts
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return ''
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def run_command(command):
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"""Runs a monit command, and returns the new status."""
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module.run_command('%s %s %s' % (MONIT, command, name), check_rc=True)
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return get_status()
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def wait_for_monit_to_stop_pending():
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"""Fails this run if there is no status or it's pending/initializing for timeout"""
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timeout_time = time.time() + timeout
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sleep_time = 5
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running_status = get_status()
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while running_status == '' or 'pending' in running_status or 'initializing' in running_status:
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if time.time() >= timeout_time:
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module.fail_json(
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msg='waited too long for "pending", or "initiating" status to go away ({0})'.format(
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running_status
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),
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state=state
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)
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time.sleep(sleep_time)
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running_status = get_status()
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MONIT_MAJOR_VERSION, MONIT_MINOR_VERSION = monit_version()
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SUMMARY_COMMAND = ('summary', 'summary -B')[is_version_higher_than_5_18()]
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if state == 'reloaded':
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if module.check_mode:
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module.exit_json(changed=True)
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rc, out, err = module.run_command('%s reload' % MONIT)
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if rc != 0:
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module.fail_json(msg='monit reload failed', stdout=out, stderr=err)
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wait_for_monit_to_stop_pending()
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module.exit_json(changed=True, name=name, state=state)
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present = get_status() != ''
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if not present and not state == 'present':
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module.fail_json(msg='%s process not presently configured with monit' % name, name=name, state=state)
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if state == 'present':
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if not present:
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if module.check_mode:
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module.exit_json(changed=True)
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status = run_command('reload')
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if status == '':
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wait_for_monit_to_stop_pending()
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module.exit_json(changed=True, name=name, state=state)
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module.exit_json(changed=False, name=name, state=state)
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wait_for_monit_to_stop_pending()
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running = 'running' in get_status()
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if running and state in ['started', 'monitored']:
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module.exit_json(changed=False, name=name, state=state)
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if running and state == 'stopped':
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if module.check_mode:
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module.exit_json(changed=True)
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status = run_command('stop')
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if status in ['not monitored'] or 'stop pending' in status:
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module.exit_json(changed=True, name=name, state=state)
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module.fail_json(msg='%s process not stopped' % name, status=status)
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if running and state == 'unmonitored':
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if module.check_mode:
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module.exit_json(changed=True)
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status = run_command('unmonitor')
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if status in ['not monitored'] or 'unmonitor pending' in status:
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module.exit_json(changed=True, name=name, state=state)
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module.fail_json(msg='%s process not unmonitored' % name, status=status)
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elif state == 'restarted':
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if module.check_mode:
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module.exit_json(changed=True)
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status = run_command('restart')
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if status in ['initializing', 'running'] or 'restart pending' in status:
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module.exit_json(changed=True, name=name, state=state)
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module.fail_json(msg='%s process not restarted' % name, status=status)
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elif not running and state == 'started':
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if module.check_mode:
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module.exit_json(changed=True)
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status = run_command('start')
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if status in ['initializing', 'running'] or 'start pending' in status:
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module.exit_json(changed=True, name=name, state=state)
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module.fail_json(msg='%s process not started' % name, status=status)
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elif not running and state == 'monitored':
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if module.check_mode:
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module.exit_json(changed=True)
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status = run_command('monitor')
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if status not in ['not monitored']:
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module.exit_json(changed=True, name=name, state=state)
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module.fail_json(msg='%s process not monitored' % name, status=status)
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module.exit_json(changed=False, name=name, state=state)
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if __name__ == '__main__':
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main()
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