OpenStack Orchestration (Heat)
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# 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 json
from webob.exc import Response
from heat.common import wsgi
from heat.common import context
from heat import rpc
def json_response(http_status, data):
"""Create a JSON response with a specific HTTP code."""
response = Response(json.dumps(data))
response.status = http_status
response.content_type = 'application/json'
return response
def json_error(http_status, message):
"""Create a JSON error response."""
body = {'error': message}
return json_response(http_status, body)
class MetadataController:
def __init__(self, options):
self.options = options
def entry_point(self, req):
return {
'name': 'Heat Metadata Server API',
'version': '1',
}
def list_stacks(self, req):
con = context.get_admin_context()
resp = rpc.call(con, 'engine',
{'method': 'metadata_list_stacks'})
return resp
def list_resources(self, req, stack_name):
con = context.get_admin_context()
resources = rpc.call(con, 'engine',
{'method': 'metadata_list_resources',
'args': {'stack_name': stack_name}})
if resources:
return resources
else:
return json_error(404,
'The stack "%s" does not exist.' % stack_name)
def get_resource(self, req, stack_name, resource_id):
con = context.get_admin_context()
[error, metadata] = rpc.call(con, 'engine',
{'method': 'metadata_get_resource',
'args': {'stack_name': stack_name,
'resource_id': resource_id}})
if error:
if error == 'stack':
return json_error(404,
'The stack "%s" does not exist.' % stack_name)
else:
return json_error(404,
'The resource "%s" does not exist.' % resource_id)
return metadata
def update_metadata(self, req, body, stack_id, resource_name):
con = context.get_admin_context()
[error, metadata] = rpc.call(con, 'engine',
{'method': 'metadata_update',
'args': {'stack_id': stack_id,
'resource_name': resource_name,
'metadata': body}})
if error:
if error == 'stack':
return json_error(404,
'The stack "%s" does not exist.' % stack_id)
else:
return json_error(404,
'The resource "%s" does not exist.' % resource_name)
return json_response(201, {
'resource': resource_name,
'metadata': body,
})
def create_event(self, req, body=None):
con = context.get_admin_context()
[error, event] = rpc.call(con, 'engine',
{'method': 'event_create',
'args': {'event': body}})
if error:
return json_error(400, error)
return json_response(201, event)
def create_watch_data(self, req, body, watch_name):
con = context.get_admin_context()
[error, watch_data] = rpc.call(con, 'engine',
{'method': 'create_watch_data',
'args': {'watch_name': watch_name,
'stats_data': body}})
if error:
return json_error(400, error)
return json_response(201, watch_data)
def list_watch_data(self, req, watch_name):
con = context.get_admin_context()
data = rpc.call(con, 'engine',
{'method': 'list_watch_data',
'args': {'watch_name': watch_name}})
if data:
return data
else:
return json_error(404,
'The watch "%s" does not exist.' % watch_name)
def create_resource(options):
"""
Stacks resource factory method.
"""
deserializer = wsgi.JSONRequestDeserializer()
serializer = wsgi.JSONResponseSerializer()
return wsgi.Resource(MetadataController(options), deserializer, serializer)