197 lines
7.1 KiB
Python
197 lines
7.1 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_utils import strutils
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import pecan
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from zun.api.controllers import base
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from zun.api.controllers.v1 import collection
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from zun.api.controllers.v1.schemas import services as schema
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from zun.api import servicegroup as svcgrp_api
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from zun.api import validation
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from zun.common import exception
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from zun.common import policy
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import zun.conf
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from zun import objects
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CONF = zun.conf.CONF
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class ZunServiceCollection(collection.Collection):
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fields = {
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'services',
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'next'
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}
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def __init__(self, **kwargs):
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super(ZunServiceCollection, self).__init__()
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self._type = 'services'
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@staticmethod
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def convert_db_rec_list_to_collection(servicegroup_api,
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rpc_hsvcs, **kwargs):
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collection = ZunServiceCollection()
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collection.services = []
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for p in rpc_hsvcs:
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service = p.as_dict()
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alive = servicegroup_api.service_is_up(p)
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state = 'up' if alive else 'down'
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service['state'] = state
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collection.services.append(service)
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if not service['availability_zone']:
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service['availability_zone'] = CONF.default_availability_zone
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next = collection.get_next(limit=None, url=None, **kwargs)
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if next is not None:
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collection.next = next
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return collection
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class ZunServiceController(base.Controller):
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"""REST controller for zun-services."""
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_custom_actions = {
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'enable': ['PUT'],
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'disable': ['PUT'],
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'force_down': ['PUT'],
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}
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def __init__(self, **kwargs):
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super(ZunServiceController, self).__init__()
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self.servicegroup_api = svcgrp_api.ServiceGroup()
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def _update(self, context, host, binary, payload):
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"""Do the actual update"""
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svc = objects.ZunService.get_by_host_and_binary(
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context, host, binary)
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if svc is None:
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raise exception.ZunServiceNotFound(
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binary=binary, host=host)
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else:
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return svc.update(context, payload)
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def _enable_or_disable(self, context, body, params_to_update):
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"""Enable/Disable scheduling for a service."""
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self._update(context, body['host'], body['binary'],
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params_to_update)
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res = {
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'service': {
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'host': body['host'],
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'binary': body['binary'],
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'disabled': params_to_update['disabled'],
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'disabled_reason': params_to_update['disabled_reason']
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},
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}
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return res
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def _enable(self, context, body):
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"""Enable scheduling for a service."""
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return self._enable_or_disable(context, body,
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{'disabled': False,
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'disabled_reason': None})
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def _disable(self, context, body, reason=None):
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"""Disable scheduling for a service with optional log."""
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return self._enable_or_disable(context, body,
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{'disabled': True,
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'disabled_reason': reason})
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def _update_forced_down(self, context, body):
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"""Set or unset forced_down flag for the service"""
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try:
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forced_down = strutils.bool_from_string(body['forced_down'], True)
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except ValueError:
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bools = ', '.join(strutils.TRUE_STRINGS + strutils.FALSE_STRINGS)
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raise exception.InvalidValue(_('Valid forced_down values are: %s')
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% bools)
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self._update(context, body['host'], body['binary'],
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{"forced_down": forced_down})
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res = {
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'service': {
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'host': body['host'],
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'binary': body['binary'],
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'forced_down': forced_down
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},
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}
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return res
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@pecan.expose('json')
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@exception.wrap_pecan_controller_exception
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def get_all(self, **kwargs):
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"""Retrieve a list of zun-services.
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"""
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context = pecan.request.context
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policy.enforce(context, "zun-service:get_all",
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action="zun-service:get_all")
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hsvcs = objects.ZunService.list(context,
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limit=None,
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marker=None,
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sort_key='id',
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sort_dir='asc')
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return ZunServiceCollection.convert_db_rec_list_to_collection(
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self.servicegroup_api, hsvcs)
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@pecan.expose('json')
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@exception.wrap_pecan_controller_exception
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def delete(self, host, binary):
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"""Delete the specified service.
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:param host: The host on which the binary is running.
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:param binary: The name of the binary.
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"""
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context = pecan.request.context
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policy.enforce(context, "zun-service:delete",
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action="zun-service:delete")
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svc = objects.ZunService.get_by_host_and_binary(
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context, host, binary)
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if svc is None:
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raise exception.ZunServiceNotFound(
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binary=binary, host=host)
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else:
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svc.destroy(context)
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@pecan.expose('json')
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@exception.wrap_pecan_controller_exception
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@validation.validate_query_param(pecan.request,
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schema.query_param_enable)
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def enable(self, **kwargs):
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context = pecan.request.context
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policy.enforce(context, "zun-service:enable",
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action="zun-service:enable")
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return self._enable(context, kwargs)
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@pecan.expose('json')
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@exception.wrap_pecan_controller_exception
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@validation.validate_query_param(pecan.request,
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schema.query_param_disable)
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def disable(self, **kwargs):
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context = pecan.request.context
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policy.enforce(context, "zun-service:disable",
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action="zun-service:disable")
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if 'disabled_reason' in kwargs:
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reason = kwargs['disabled_reason']
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else:
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reason = None
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return self._disable(context, kwargs, reason)
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@pecan.expose('json')
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@exception.wrap_pecan_controller_exception
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@validation.validate_query_param(pecan.request,
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schema.query_param_force_down)
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def force_down(self, **kwargs):
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context = pecan.request.context
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policy.enforce(context, "zun-service:force_down",
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action="zun-service:force_down")
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return self._update_forced_down(context, kwargs)
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