251 lines
10 KiB
Python
251 lines
10 KiB
Python
# coding=utf-8
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright (c) 2012, Intel Performance Learning Solutions Ltd.
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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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"""
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OCCI WSGI app :-)
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"""
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# W0613:unused args,R0903:too few pub methods
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# pylint: disable=W0613,R0903
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import logging
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from nova import flags
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from nova import wsgi
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from nova import db
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from nova.image import glance
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from nova.compute import instance_types
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from nova.openstack.common import cfg
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from occi_os_api import registry
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from occi_os_api.backends import compute
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from occi_os_api.backends import openstack
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from occi_os_api.backends import network
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from occi_os_api.backends import storage
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from occi_os_api.extensions import os_mixins
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from occi_os_api.extensions import os_addon
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from occi import backend
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from occi import core_model
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from occi import wsgi as occi_wsgi
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from occi.extensions import infrastructure
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from urllib import quote
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LOG = logging.getLogger(__name__)
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#Setup options
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OCCI_OPTS = [
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cfg.IntOpt("occiapi_listen_port",
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default=8787,
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help="Port OCCI interface will listen on."),
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cfg.StrOpt("occi_custom_location_hostname",
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default=None,
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help="Override OCCI location hostname with custom value")
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]
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FLAGS = flags.FLAGS
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FLAGS.register_opts(OCCI_OPTS)
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MIXIN_BACKEND = backend.MixinBackend()
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class OCCIApplication(occi_wsgi.Application, wsgi.Application):
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"""
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Adapter which 'translates' represents a nova WSGI application into and OCCI
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WSGI application.
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"""
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def __init__(self):
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"""
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Initialize the WSGI OCCI application.
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"""
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super(OCCIApplication, self).__init__(registry=registry.OCCIRegistry())
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self._register_backends()
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def _register_backends(self):
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"""
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Registers the OCCI infrastructure resources to ensure compliance
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with GFD184
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"""
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compute_backend = compute.ComputeBackend()
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network_backend = network.NetworkBackend()
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networkinterface_backend = network.NetworkInterfaceBackend()
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ipnetwork_backend = network.IpNetworkBackend()
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ipnetworking_backend = network.IpNetworkInterfaceBackend()
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storage_backend = storage.StorageBackend()
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storage_link_backend = storage.StorageLinkBackend()
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# register kinds with backends
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self.register_backend(infrastructure.COMPUTE, compute_backend)
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self.register_backend(infrastructure.START, compute_backend)
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self.register_backend(infrastructure.STOP, compute_backend)
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self.register_backend(infrastructure.RESTART, compute_backend)
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self.register_backend(infrastructure.SUSPEND, compute_backend)
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self.register_backend(infrastructure.OS_TEMPLATE, MIXIN_BACKEND)
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self.register_backend(infrastructure.RESOURCE_TEMPLATE, MIXIN_BACKEND)
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self.register_backend(infrastructure.NETWORK, network_backend)
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self.register_backend(infrastructure.UP, network_backend)
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self.register_backend(infrastructure.DOWN, network_backend)
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self.register_backend(infrastructure.NETWORKINTERFACE,
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networkinterface_backend)
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self.register_backend(infrastructure.IPNETWORK, ipnetwork_backend)
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self.register_backend(infrastructure.IPNETWORKINTERFACE,
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ipnetworking_backend)
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self.register_backend(infrastructure.STORAGE, storage_backend)
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self.register_backend(infrastructure.ONLINE, storage_backend)
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self.register_backend(infrastructure.OFFLINE, storage_backend)
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self.register_backend(infrastructure.BACKUP, storage_backend)
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self.register_backend(infrastructure.SNAPSHOT, storage_backend)
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self.register_backend(infrastructure.RESIZE, storage_backend)
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self.register_backend(infrastructure.STORAGELINK, storage_link_backend)
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# add extensions for occi.
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self.register_backend(os_addon.SEC_GROUP,
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openstack.SecurityGroupBackend())
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self.register_backend(os_addon.SEC_RULE,
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openstack.SecurityRuleBackend())
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self.register_backend(os_addon.OS_VM,
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openstack.OsComputeBackend())
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self.register_backend(os_addon.OS_CREATE_IMAGE,
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openstack.OsComputeBackend())
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self.register_backend(os_addon.OS_KEY_PAIR_EXT,
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openstack.OsComputeBackend())
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self.register_backend(os_addon.OS_CHG_PWD,
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openstack.OsComputeBackend())
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self.register_backend(os_addon.OS_NET_LINK,
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openstack.OsNetLinkBackend())
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def __call__(self, environ, response):
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"""
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This will be called as defined by WSGI.
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Deals with incoming requests and outgoing responses
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Takes the incoming request, sends it on to the OCCI WSGI application,
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which finds the appropriate backend for it and then executes the
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request. The backend then is responsible for the return content.
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environ -- The environ.
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response -- The response.
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"""
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extras = {'nova_ctx': environ['nova.context']}
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# register/refresh openstack images
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self._refresh_os_mixins(extras)
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# register/refresh openstack instance types (flavours)
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self._refresh_resource_mixins(extras)
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# register/refresh the openstack security groups as Mixins
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self._refresh_security_mixins(extras)
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return self._call_occi(environ, response, nova_ctx=extras['nova_ctx'],
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registry=self.registry)
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def _refresh_os_mixins(self, extras):
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"""
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Register images as OsTemplate mixins from
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information retrieved from glance (shared and user-specific).
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"""
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template_schema = 'http://schemas.openstack.org/template/os#'
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image_service = glance.get_default_image_service()
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images = image_service.detail(extras['nova_ctx'])
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for img in images:
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# If the image is a kernel or ram one
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# and we're not to filter them out then register it.
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if (((img['container_format'] or img['disk_format']) in ('ari',
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'aki'))):
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msg = 'Not registering kernel/RAM image.'
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LOG.debug(msg)
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continue
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os_template = os_mixins.OsTemplate(
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term=img['id'],
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scheme=template_schema,
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os_id=img['id'],
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related=[infrastructure.OS_TEMPLATE],
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attributes=None,
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title='This is an OS ' + img['name'] + \
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' VM image',
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location='/' + quote(img['id']) + '/')
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try:
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self.registry.get_backend(os_template, extras)
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except AttributeError:
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msg = 'Registering an OS image type as: %s' % str(os_template)
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LOG.debug(msg)
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self.register_backend(os_template, MIXIN_BACKEND)
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def _refresh_resource_mixins(self, extras):
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"""
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Register the flavors as ResourceTemplates to which the user has access.
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"""
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template_schema = 'http://schemas.openstack.org/template/resource#'
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os_flavours = instance_types.get_all_types()
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for itype in os_flavours.values():
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resource_template = os_mixins.ResourceTemplate(
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term=itype["flavorid"],
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scheme=template_schema,
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related=[infrastructure.RESOURCE_TEMPLATE],
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title='This is an openstack ' + itype["name"] + ' flavor.',
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location='/' + quote(itype["flavorid"]) + '/')
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try:
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self.registry.get_backend(resource_template, extras)
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except AttributeError:
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msg = 'Registering an OpenStack flavour/instance type: %s' % \
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str(resource_template)
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LOG.debug(msg)
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self.register_backend(resource_template, MIXIN_BACKEND)
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def _refresh_security_mixins(self, extras):
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"""
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Registers security groups as security mixins
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"""
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# ensures that preexisting openstack security groups are
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# added and only once.
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# collect these and add them to an exclusion list so they're
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# not created again when listing non-user-defined sec. groups
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excld_grps = []
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for cat in self.registry.get_categories(extras):
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if (isinstance(cat, core_model.Mixin) and
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os_addon.SEC_GROUP in cat.related):
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excld_grps.append(cat.term)
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groups = db.security_group_get_by_project(extras['nova_ctx'],
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extras['nova_ctx'].project_id)
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sec_grp = 'http://schemas.openstack.org/infrastructure/security/group#'
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for group in groups:
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if group['name'] not in excld_grps:
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sec_mix = os_mixins.UserSecurityGroupMixin(
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term=str(group["id"]), # NOTE(aloga): group.id is a long
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scheme=sec_grp,
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related=[os_addon.SEC_GROUP],
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attributes=None,
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title=group['name'],
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location='/security/' + quote(str(group['id'])) + '/')
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try:
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self.registry.get_backend(sec_mix, extras)
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except AttributeError:
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self.register_backend(sec_mix, MIXIN_BACKEND)
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