213 lines
9 KiB
Python
213 lines
9 KiB
Python
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# -*- coding: utf-8 -*-
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# Copyright: (c) 2020, Amin Vakil <info@aminvakil.com>
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# Copyright: (c) 2016-2018, Matt Davis <mdavis@ansible.com>
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# Copyright: (c) 2018, Sam Doran <sdoran@redhat.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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from ansible.errors import AnsibleError, AnsibleConnectionFailure
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from ansible.module_utils.common.text.converters import to_native, to_text
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from ansible.module_utils.common.collections import is_string
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from ansible.plugins.action import ActionBase
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from ansible.utils.display import Display
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display = Display()
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class TimedOutException(Exception):
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pass
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class ActionModule(ActionBase):
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TRANSFERS_FILES = False
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_VALID_ARGS = frozenset((
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'msg',
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'delay',
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'search_paths'
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))
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DEFAULT_CONNECT_TIMEOUT = None
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DEFAULT_PRE_SHUTDOWN_DELAY = 0
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DEFAULT_SHUTDOWN_MESSAGE = 'Shut down initiated by Ansible'
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DEFAULT_SHUTDOWN_COMMAND = 'shutdown'
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DEFAULT_SHUTDOWN_COMMAND_ARGS = '-h {delay_min} "{message}"'
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DEFAULT_SUDOABLE = True
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SHUTDOWN_COMMANDS = {
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'alpine': 'poweroff',
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'vmkernel': 'halt',
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}
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SHUTDOWN_COMMAND_ARGS = {
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'alpine': '',
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'void': '-h +{delay_min} "{message}"',
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'freebsd': '-h +{delay_sec}s "{message}"',
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'linux': DEFAULT_SHUTDOWN_COMMAND_ARGS,
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'macosx': '-h +{delay_min} "{message}"',
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'openbsd': '-h +{delay_min} "{message}"',
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'solaris': '-y -g {delay_sec} -i 5 "{message}"',
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'sunos': '-y -g {delay_sec} -i 5 "{message}"',
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'vmkernel': '-d {delay_sec}',
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'aix': '-Fh',
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}
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def __init__(self, *args, **kwargs):
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super(ActionModule, self).__init__(*args, **kwargs)
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@property
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def delay(self):
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return self._check_delay('delay', self.DEFAULT_PRE_SHUTDOWN_DELAY)
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def _check_delay(self, key, default):
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"""Ensure that the value is positive or zero"""
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value = int(self._task.args.get(key, default))
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if value < 0:
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value = 0
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return value
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def _get_value_from_facts(self, variable_name, distribution, default_value):
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"""Get dist+version specific args first, then distribution, then family, lastly use default"""
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attr = getattr(self, variable_name)
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value = attr.get(
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distribution['name'] + distribution['version'],
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attr.get(
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distribution['name'],
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attr.get(
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distribution['family'],
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getattr(self, default_value))))
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return value
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def get_shutdown_command_args(self, distribution):
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args = self._get_value_from_facts('SHUTDOWN_COMMAND_ARGS', distribution, 'DEFAULT_SHUTDOWN_COMMAND_ARGS')
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# Convert seconds to minutes. If less that 60, set it to 0.
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delay_sec = self.delay
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shutdown_message = self._task.args.get('msg', self.DEFAULT_SHUTDOWN_MESSAGE)
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return args.format(delay_sec=delay_sec, delay_min=delay_sec // 60, message=shutdown_message)
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def get_distribution(self, task_vars):
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# FIXME: only execute the module if we don't already have the facts we need
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distribution = {}
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display.debug('{action}: running setup module to get distribution'.format(action=self._task.action))
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module_output = self._execute_module(
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task_vars=task_vars,
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module_name='ansible.legacy.setup',
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module_args={'gather_subset': 'min'})
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try:
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if module_output.get('failed', False):
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raise AnsibleError('Failed to determine system distribution. {0}, {1}'.format(
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to_native(module_output['module_stdout']).strip(),
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to_native(module_output['module_stderr']).strip()))
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distribution['name'] = module_output['ansible_facts']['ansible_distribution'].lower()
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distribution['version'] = to_text(module_output['ansible_facts']['ansible_distribution_version'].split('.')[0])
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distribution['family'] = to_text(module_output['ansible_facts']['ansible_os_family'].lower())
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display.debug("{action}: distribution: {dist}".format(action=self._task.action, dist=distribution))
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return distribution
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except KeyError as ke:
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raise AnsibleError('Failed to get distribution information. Missing "{0}" in output.'.format(ke.args[0]))
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def get_shutdown_command(self, task_vars, distribution):
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shutdown_bin = self._get_value_from_facts('SHUTDOWN_COMMANDS', distribution, 'DEFAULT_SHUTDOWN_COMMAND')
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default_search_paths = ['/sbin', '/usr/sbin', '/usr/local/sbin']
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search_paths = self._task.args.get('search_paths', default_search_paths)
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# FIXME: switch all this to user arg spec validation methods when they are available
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# Convert bare strings to a list
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if is_string(search_paths):
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search_paths = [search_paths]
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# Error if we didn't get a list
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err_msg = "'search_paths' must be a string or flat list of strings, got {0}"
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try:
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incorrect_type = any(not is_string(x) for x in search_paths)
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if not isinstance(search_paths, list) or incorrect_type:
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raise TypeError
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except TypeError:
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raise AnsibleError(err_msg.format(search_paths))
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display.debug('{action}: running find module looking in {paths} to get path for "{command}"'.format(
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action=self._task.action,
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command=shutdown_bin,
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paths=search_paths))
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find_result = self._execute_module(
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task_vars=task_vars,
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# prevent collection search by calling with ansible.legacy (still allows library/ override of find)
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module_name='ansible.legacy.find',
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module_args={
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'paths': search_paths,
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'patterns': [shutdown_bin],
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'file_type': 'any'
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}
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)
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full_path = [x['path'] for x in find_result['files']]
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if not full_path:
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raise AnsibleError('Unable to find command "{0}" in search paths: {1}'.format(shutdown_bin, search_paths))
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self._shutdown_command = full_path[0]
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return self._shutdown_command
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def perform_shutdown(self, task_vars, distribution):
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result = {}
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shutdown_result = {}
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shutdown_command = self.get_shutdown_command(task_vars, distribution)
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shutdown_command_args = self.get_shutdown_command_args(distribution)
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shutdown_command_exec = '{0} {1}'.format(shutdown_command, shutdown_command_args)
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self.cleanup(force=True)
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try:
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display.vvv("{action}: shutting down server...".format(action=self._task.action))
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display.debug("{action}: shutting down server with command '{command}'".format(action=self._task.action, command=shutdown_command_exec))
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if self._play_context.check_mode:
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shutdown_result['rc'] = 0
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else:
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shutdown_result = self._low_level_execute_command(shutdown_command_exec, sudoable=self.DEFAULT_SUDOABLE)
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except AnsibleConnectionFailure as e:
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# If the connection is closed too quickly due to the system being shutdown, carry on
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display.debug('{action}: AnsibleConnectionFailure caught and handled: {error}'.format(action=self._task.action, error=to_text(e)))
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shutdown_result['rc'] = 0
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if shutdown_result['rc'] != 0:
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result['failed'] = True
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result['shutdown'] = False
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result['msg'] = "Shutdown command failed. Error was {stdout}, {stderr}".format(
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stdout=to_native(shutdown_result['stdout'].strip()),
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stderr=to_native(shutdown_result['stderr'].strip()))
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return result
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result['failed'] = False
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result['shutdown_command'] = shutdown_command_exec
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return result
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def run(self, tmp=None, task_vars=None):
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self._supports_check_mode = True
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self._supports_async = True
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# If running with local connection, fail so we don't shutdown ourself
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if self._connection.transport == 'local' and (not self._play_context.check_mode):
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msg = 'Running {0} with local connection would shutdown the control node.'.format(self._task.action)
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return {'changed': False, 'elapsed': 0, 'shutdown': False, 'failed': True, 'msg': msg}
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if task_vars is None:
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task_vars = {}
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result = super(ActionModule, self).run(tmp, task_vars)
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if result.get('skipped', False) or result.get('failed', False):
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return result
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distribution = self.get_distribution(task_vars)
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# Initiate shutdown
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shutdown_result = self.perform_shutdown(task_vars, distribution)
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if shutdown_result['failed']:
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result = shutdown_result
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return result
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result['shutdown'] = True
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result['changed'] = True
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result['shutdown_command'] = shutdown_result['shutdown_command']
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return result
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