c9b9e65059
There is a potential for a race condition if the websocket is not set up before the call is made to Mistral. The websocket setup can take sufficient time to set up, and if an error is thrown immediately from a workflow, it has the potential of returning a message, and having the websocket consume it before the websocket client is even set up. Also, I think this has the benefit of keeping the call to Mistral from even being made if there is something wrong with the websocket setup. Change-Id: Ib331037a7f5f4e59862d2b9646a83acdb18313eb
61 lines
1.9 KiB
Python
61 lines
1.9 KiB
Python
# Copyright 2016 Red Hat, Inc.
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# All Rights Reserved.
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#
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# 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 __future__ import print_function
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import uuid
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from tripleoclient.exceptions import InvalidConfiguration
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from tripleoclient.workflows import base
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def delete_node(clients, **workflow_input):
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workflow_client = clients.workflow_engine
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tripleoclients = clients.tripleoclient
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queue_name = workflow_input['queue_name']
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with tripleoclients.messaging_websocket(queue_name) as ws:
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execution = base.start_workflow(
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workflow_client,
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'tripleo.scale.v1.delete_node',
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workflow_input=workflow_input
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)
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for payload in base.wait_for_messages(workflow_client, ws, execution,
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360):
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if payload['status'] != "SUCCESS":
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raise InvalidConfiguration(payload['message'])
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def scale_down(clients, plan_name, nodes, timeout=None):
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"""Deletes overcloud nodes from a heat stack.
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:param clients: openstack clients
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:param plan_name: name of the container holding the plan data
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:param nodes: list of node id's to remove from the stack
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:param timeout: timeout for stack update operation
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"""
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workflow_input = {
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"container": plan_name,
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"nodes": nodes,
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"queue_name": str(uuid.uuid4()),
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}
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if timeout is not None:
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workflow_input['timeout'] = timeout
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delete_node(clients, **workflow_input)
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