74bc31e562
add 'disabled_reason' filed into 'ComputeNode' resource, to distinguish which nodes are disabled by Watcher and which are not by Watcher. Implements:blueprint extend-node-status Change-Id: I7175f14870834a4582e45309529d7e8d9fbb2e6f
129 lines
4.2 KiB
Python
129 lines
4.2 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2015 b<>com
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#
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# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from watcher._i18n import _
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from watcher.applier.actions import base
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from watcher.common import exception
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from watcher.common import nova_helper
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from watcher.decision_engine.model import element
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class ChangeNovaServiceState(base.BaseAction):
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"""Disables or enables the nova-compute service, deployed on a host
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By using this action, you will be able to update the state of a
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nova-compute service. A disabled nova-compute service can not be selected
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by the nova scheduler for future deployment of server.
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The action schema is::
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schema = Schema({
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'resource_id': str,
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'state': str,
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'disabled_reason': str,
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})
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The `resource_id` references a nova-compute service name (list of available
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nova-compute services is returned by this command: ``nova service-list
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--binary nova-compute``).
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The `state` value should either be `ONLINE` or `OFFLINE`.
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The `disabled_reason` references the reason why Watcher disables this
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nova-compute service. The value should be with `watcher_` prefix, such as
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`watcher_disabled`, `watcher_maintaining`.
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"""
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STATE = 'state'
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REASON = 'disabled_reason'
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@property
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def schema(self):
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return {
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'type': 'object',
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'properties': {
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'resource_id': {
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'type': 'string',
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"minlength": 1
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},
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'state': {
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'type': 'string',
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'enum': [element.ServiceState.ONLINE.value,
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element.ServiceState.OFFLINE.value,
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element.ServiceState.ENABLED.value,
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element.ServiceState.DISABLED.value]
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},
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'disabled_reason': {
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'type': 'string',
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"minlength": 1
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}
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},
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'required': ['resource_id', 'state'],
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'additionalProperties': False,
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}
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@property
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def host(self):
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return self.resource_id
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@property
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def state(self):
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return self.input_parameters.get(self.STATE)
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@property
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def reason(self):
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return self.input_parameters.get(self.REASON)
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def execute(self):
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target_state = None
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if self.state == element.ServiceState.DISABLED.value:
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target_state = False
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elif self.state == element.ServiceState.ENABLED.value:
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target_state = True
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return self._nova_manage_service(target_state)
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def revert(self):
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target_state = None
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if self.state == element.ServiceState.DISABLED.value:
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target_state = True
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elif self.state == element.ServiceState.ENABLED.value:
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target_state = False
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return self._nova_manage_service(target_state)
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def _nova_manage_service(self, state):
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if state is None:
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raise exception.IllegalArgumentException(
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message=_("The target state is not defined"))
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nova = nova_helper.NovaHelper(osc=self.osc)
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if state is True:
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return nova.enable_service_nova_compute(self.host)
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else:
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return nova.disable_service_nova_compute(self.host, self.reason)
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def pre_condition(self):
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pass
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def post_condition(self):
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pass
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def get_description(self):
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"""Description of the action"""
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return ("Disables or enables the nova-compute service."
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"A disabled nova-compute service can not be selected "
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"by the nova for future deployment of new server.")
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