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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright (c) 2015, Brian Coca <bcoca@ansible.com>
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later
from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = r'''
---
module: runit
author:
- James Sumners (@jsumners)
short_description: Manage runit services
description:
- Controls runit services on remote hosts using the sv utility.
extends_documentation_fragment:
- community.general.attributes
attributes:
check_mode:
support: full
diff_mode:
support: none
options:
name:
description:
- Name of the service to manage.
type: str
required: true
state:
description:
- V(started)/V(stopped) are idempotent actions that will not run
commands unless necessary. V(restarted) will always bounce the
service (sv restart) and V(killed) will always bounce the service (sv force-stop).
V(reloaded) will send a HUP (sv reload).
V(once) will run a normally downed sv once (sv once), not really
an idempotent operation.
type: str
choices: [ killed, once, reloaded, restarted, started, stopped ]
enabled:
description:
- Whether the service is enabled or not, if disabled it also implies stopped.
type: bool
service_dir:
description:
- directory runsv watches for services
type: str
default: /var/service
service_src:
description:
- directory where services are defined, the source of symlinks to service_dir.
type: str
default: /etc/sv
'''
EXAMPLES = r'''
- name: Start sv dnscache, if not running
community.general.runit:
name: dnscache
state: started
- name: Stop sv dnscache, if running
community.general.runit:
name: dnscache
state: stopped
- name: Kill sv dnscache, in all cases
community.general.runit:
name: dnscache
state: killed
- name: Restart sv dnscache, in all cases
community.general.runit:
name: dnscache
state: restarted
- name: Reload sv dnscache, in all cases
community.general.runit:
name: dnscache
state: reloaded
- name: Use alternative sv directory location
community.general.runit:
name: dnscache
state: reloaded
service_dir: /run/service
'''
import os
import re
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.common.text.converters import to_native
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 __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, required=True)
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 as e:
self.module.fail_json(path=self.src_full, msg='Error while linking: %s' % to_native(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 as e:
self.module.fail_json(path=self.svc_full, msg='Error while unlinking: %s' % to_native(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
# full_state *may* contain information about the logger:
# "down: /etc/service/service-without-logger: 1s, normally up\n"
# "down: /etc/service/updater: 127s, normally up; run: log: (pid 364) 263439s\n"
full_state_no_logger = self.full_state.split("; ")[0]
m = re.search(r'\(pid (\d+)\)', full_state_no_logger)
if m:
self.pid = m.group(1)
m = re.search(r' (\d+)s', full_state_no_logger)
if m:
self.duration = m.group(1)
if re.search(r'^run:', full_state_no_logger):
self.state = 'started'
elif re.search(r'^down:', full_state_no_logger):
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(cmd)
except Exception as e:
self.module.fail_json(msg="failed to execute: %s" % to_native(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
def main():
module = AnsibleModule(
argument_spec=dict(
name=dict(type='str', required=True),
state=dict(type='str', choices=['killed', 'once', 'reloaded', 'restarted', 'started', 'stopped']),
enabled=dict(type='bool'),
service_dir=dict(type='str', default='/var/service'),
service_src=dict(type='str', 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
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) as e:
module.fail_json(msg="Could not change service link: %s" % to_native(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()
|
