OpenStack Study: hide_server_addresses.py

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# 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.

"""Extension for hiding server addresses in certain states."""

from oslo.config import cfg

from nova.api.openstack import extensions

from nova.api.openstack import wsgi

from nova.compute import vm_states

CONF = cfg.CONF

CONF.import_opt('osapi_hide_server_address_states',

'nova.api.openstack.compute.plugins.v3.hide_server_addresses')

authorize = extensions.soft_extension_authorizer('compute',

'hide_server_addresses')

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class Controller(wsgi.Controller):

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def __init__(self, *args, **kwargs):

super(Controller, self).__init__(*args, **kwargs)

hidden_states = CONF.osapi_hide_server_address_states

# NOTE(jkoelker) _ is not considered uppercase ;)

valid_vm_states = [getattr(vm_states, state)

for state in dir(vm_states)

if state.isupper()]

self.hide_address_states = [state.lower()

for state in hidden_states

if state in valid_vm_states]

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def _perhaps_hide_addresses(self, instance, resp_server):

if instance.get('vm_state') in self.hide_address_states:

resp_server['addresses'] = {}

@wsgi.extends

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def show(self, req, resp_obj, id):

resp = resp_obj

if not authorize(req.environ['nova.context']):

return

if 'server' in resp.obj and 'addresses' in resp.obj['server']:

instance = req.get_db_instance(id)

self._perhaps_hide_addresses(instance, resp.obj['server'])

@wsgi.extends

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def detail(self, req, resp_obj):

resp = resp_obj

if not authorize(req.environ['nova.context']):

return

for server in list(resp.obj['servers']):

if 'addresses' in server:

instance = req.get_db_instance(server['id'])

self._perhaps_hide_addresses(instance, server)

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class Hide_server_addresses(extensions.ExtensionDescriptor):

"""Support hiding server addresses in certain states."""

name = 'HideServerAddresses'

alias = 'os-hide-server-addresses'

namespace = ('http://docs.openstack.org/compute/ext/'

'hide_server_addresses/api/v1.1')

updated = '2012-12-11T00:00:00+00:00'

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def get_controller_extensions(self):

return [extensions.ControllerExtension(self, 'servers', Controller())]