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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2016, Andrew Gaffney <andrew@agaffney.org>
#
# 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/>.
ANSIBLE_METADATA = {'status': ['preview'],
'supported_by': 'committer',
'version': '1.0'}
DOCUMENTATION = '''
module: openwrt_init
author:
- "Andrew Gaffney (@agaffney)"
version_added: "2.3"
short_description: Manage services on OpenWrt.
description:
- Controls OpenWrt services on remote hosts.
options:
name:
required: true
description:
- Name of the service.
aliases: ['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.)
pattern:
required: false
description:
- If the service does not respond to the 'running' command, name a
substring to look for as would be found in the output of the I(ps)
command as a stand-in for a 'running' result. If the string is found,
the service will be assumed to be running.
notes:
- One option other than name is required.
requirements:
- An OpenWrt system
'''
EXAMPLES = '''
# Example action to start service httpd, if not running
- openwrt_init:
state: started
name: httpd
# Example action to stop service cron, if running
- openwrt_init:
name: cron
state: stopped
# Example action to reload service httpd, in all cases
- openwrt_init:
name: httpd
state: reloaded
# Example action to enable service httpd
- openwrt_init:
name: httpd
enabled: yes
'''
RETURN = '''
'''
import os
import glob
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils._text import to_bytes, to_native
module = None
init_script = None
# ===============================
# Check if service is enabled
def is_enabled():
(rc, out, err) = module.run_command("%s enabled" % init_script)
if rc == 0:
return True
return False
# ===========================================
# Main control flow
def main():
global module, init_script
# init
module = AnsibleModule(
argument_spec = dict(
name = dict(required=True, type='str', aliases=['service']),
state = dict(choices=['started', 'stopped', 'restarted', 'reloaded'], type='str'),
enabled = dict(type='bool'),
pattern = dict(required=False, default=None),
),
supports_check_mode=True,
required_one_of=[['state', 'enabled']],
)
# initialize
service = module.params['name']
init_script = '/etc/init.d/' + service
rc = 0
out = err = ''
result = {
'name': service,
'changed': False,
}
# check if service exists
if not os.path.exists(init_script):
module.fail_json(msg='service %s does not exist' % service)
# Enable/disable service startup at boot if requested
if module.params['enabled'] is not None:
# do we need to enable the service?
enabled = is_enabled()
# 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" % (init_script, action))
# openwrt init scripts can return a non-zero exit code on a successful 'enable'
# command if the init script doesn't contain a STOP value, so we ignore the exit
# code and explicitly check if the service is now in the desired state
if is_enabled() != module.params['enabled']:
module.fail_json(msg="Unable to %s service %s: %s" % (action, service, err))
result['enabled'] = not enabled
if module.params['state'] is not None:
running = False
# check if service is currently running
if module.params['pattern']:
# Find ps binary
psbin = module.get_bin_path('ps', True)
# this should be busybox ps, so we only want/need to the 'w' option
(rc, psout, pserr) = module.run_command('%s w' % psbin)
# If rc is 0, set running as appropriate
if rc == 0:
lines = psout.split("\n")
for line in lines:
if module.params['pattern'] in line and not "pattern=" in line:
# so as to not confuse ./hacking/test-module
running = True
break
else:
(rc, out, err) = module.run_command("%s running" % init_script)
if rc == 0:
running = True
# default to desired state
result['state'] = module.params['state']
# determine action, if any
action = None
if module.params['state'] == 'started':
if not running:
action = 'start'
result['changed'] = True
elif module.params['state'] == 'stopped':
if running:
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" % (init_script, action))
if rc != 0:
module.fail_json(msg="Unable to %s service %s: %s" % (action, service, err))
module.exit_json(**result)
if __name__ == '__main__':
main()
|
