homeserver/ansible_collections/community/general/plugins/modules/system/openwrt_init.py

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2022-04-01 18:57:35 +02:00
#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2016, Andrew Gaffney <andrew@agaffney.org>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = '''
module: openwrt_init
author:
- "Andrew Gaffney (@agaffney)"
short_description: Manage services on OpenWrt.
description:
- Controls OpenWrt services on remote hosts.
options:
name:
type: str
description:
- Name of the service.
required: true
aliases: ['service']
state:
type: str
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.
choices: [ 'started', 'stopped', 'restarted', 'reloaded' ]
enabled:
description:
- Whether the service should start on boot. B(At least one of state and enabled are required.)
type: bool
pattern:
type: str
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 (with python)
'''
EXAMPLES = '''
- name: Start service httpd, if not running
community.general.openwrt_init:
state: started
name: httpd
- name: Stop service cron, if running
community.general.openwrt_init:
name: cron
state: stopped
- name: Reload service httpd, in all cases
community.general.openwrt_init:
name: httpd
state: reloaded
- name: Enable service httpd
community.general.openwrt_init:
name: httpd
enabled: yes
'''
RETURN = '''
'''
import os
from ansible.module_utils.basic import AnsibleModule
module = None
init_script = None
# ===============================
# Check if service is enabled
def is_enabled():
rc, dummy, dummy = module.run_command([init_script, 'enabled'])
return rc == 0
# ===========================================
# 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(type='str', choices=['started', 'stopped', 'restarted', 'reloaded']),
enabled=dict(type='bool'),
pattern=dict(type='str'),
),
supports_check_mode=True,
required_one_of=[('state', 'enabled')],
)
# initialize
service = module.params['name']
init_script = '/etc/init.d/' + service
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
action = 'enable' if module.params['enabled'] else 'disable'
if not module.check_mode:
rc, dummy, err = module.run_command([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, dummy = module.run_command([psbin, 'w'])
# If rc is 0, set running as appropriate
if rc == 0:
lines = psout.split("\n")
running = any((module.params['pattern'] in line and "pattern=" not in line) for line in lines)
else:
rc, dummy, dummy = module.run_command([init_script, 'running'])
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, dummy, err = module.run_command([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()