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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (c) 2017 Cisco and/or its affiliates.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import logging
from vicn.core.exception import ResourceNotFound
from vicn.core.resource import CategoryResource
from vicn.core.task import inline_task, BashTask, EmptyTask
from vicn.resource.linux.application import LinuxApplication
log = logging.getLogger(__name__)
CMD_START = 'service {service_name} start'
CMD_STOP = 'service {service_name} stop'
CMD_RESTART = 'service {service_name} restart'
CMD_STOP_START = 'service {service_name} stop && sleep 1 && ' \
'service {service_name} start'
class Service(LinuxApplication):
"""Service resource
This resource wraps a Linux Service, and ensure the service is started
(resp. stopped) during setup (resp. teardown).
Required tags:
__service_name__ (str): all classes that inherit from Service should
inform this tag which gives the name of the service known to the
system.
TODO:
* Support for upstart, sysvinit and systemd services.
* Start and Stop method
* Status attribute
"""
__type__ = CategoryResource
@inline_task
def __get__(self):
raise ResourceNotFound
def __method_restart__(self):
return BashTask(self.node, CMD_RESTART,
{'service_name': self.__service_name__})
def __method_start__(self):
return BashTask(self.node, CMD_START,
{'service_name': self.__service_name__})
def __create__(self):
if self.__service_name__ == 'lxd':
log.warning('Not restarting LXD')
return EmptyTask()
if self.__service_name__ == 'dnsmasq':
return BashTask(self.node, CMD_STOP_START,
{'service_name': self.__service_name__})
return self.__method_restart__()
def __delete__(self):
return BashTask(self.node, CMD_STOP,
{'service_name': self.__service_name__})
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