683 lines
31 KiB
Python
683 lines
31 KiB
Python
# Copyright 2010-2011 OpenStack Foundation
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# Copyright 2011 Piston Cloud Computing, 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 oslo_log import log as logging
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from oslo_serialization import jsonutils
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from nova.api.openstack import api_version_request
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from nova.api.openstack import common
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from nova.api.openstack.compute.views import addresses as views_addresses
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from nova.api.openstack.compute.views import flavors as views_flavors
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from nova.api.openstack.compute.views import images as views_images
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from nova import availability_zones as avail_zone
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from nova.compute import api as compute
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from nova.compute import vm_states
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from nova import context as nova_context
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from nova import exception
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from nova.network.security_group import openstack_driver
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from nova import objects
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from nova.objects import virtual_interface
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from nova.policies import extended_server_attributes as esa_policies
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from nova.policies import flavor_extra_specs as fes_policies
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from nova.policies import servers as servers_policies
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from nova import utils
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LOG = logging.getLogger(__name__)
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class ViewBuilder(common.ViewBuilder):
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"""Model a server API response as a python dictionary."""
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_collection_name = "servers"
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_progress_statuses = (
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"ACTIVE",
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"BUILD",
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"REBUILD",
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"RESIZE",
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"VERIFY_RESIZE",
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"MIGRATING",
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)
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_fault_statuses = (
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"ERROR", "DELETED"
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)
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# These are the lazy-loadable instance attributes required for showing
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# details about an instance. Add to this list as new things need to be
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# shown.
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_show_expected_attrs = ['flavor', 'info_cache', 'metadata']
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def __init__(self):
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"""Initialize view builder."""
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super(ViewBuilder, self).__init__()
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self._address_builder = views_addresses.ViewBuilder()
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self._image_builder = views_images.ViewBuilder()
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self._flavor_builder = views_flavors.ViewBuilder()
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self.compute_api = compute.API()
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self.security_group_api = (
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openstack_driver.get_openstack_security_group_driver())
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def create(self, request, instance):
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"""View that should be returned when an instance is created."""
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server = {
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"server": {
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"id": instance["uuid"],
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"links": self._get_links(request,
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instance["uuid"],
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self._collection_name),
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# NOTE(sdague): historically this was the
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# os-disk-config extension, but now that extensions
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# are gone, we merge these attributes here.
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"OS-DCF:diskConfig": (
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'AUTO' if instance.get('auto_disk_config') else 'MANUAL'),
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},
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}
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self._add_security_grps(request, [server["server"]], [instance])
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return server
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def basic(self, request, instance, show_extra_specs=False,
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show_extended_attr=None, show_host_status=None,
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show_sec_grp=None, bdms=None, cell_down_support=False):
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"""Generic, non-detailed view of an instance."""
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if cell_down_support and 'display_name' not in instance:
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# NOTE(tssurya): If the microversion is >= 2.69, this boolean will
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# be true in which case we check if there are instances from down
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# cells (by checking if their objects have missing keys like
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# `display_name`) and return partial constructs based on the
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# information available from the nova_api database.
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return {
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"server": {
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"id": instance.uuid,
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"status": "UNKNOWN",
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"links": self._get_links(request,
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instance.uuid,
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self._collection_name),
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},
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}
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return {
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"server": {
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"id": instance["uuid"],
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"name": instance["display_name"],
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"links": self._get_links(request,
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instance["uuid"],
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self._collection_name),
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},
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}
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def get_show_expected_attrs(self, expected_attrs=None):
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"""Returns a list of lazy-loadable expected attributes used by show
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This should be used when getting the instances from the database so
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that the necessary attributes are pre-loaded before needing to build
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the show response where lazy-loading can fail if an instance was
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deleted.
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:param list expected_attrs: The list of expected attributes that will
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be requested in addition to what this view builder requires. This
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method will merge the two lists and return what should be
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ultimately used when getting an instance from the database.
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:returns: merged and sorted list of expected attributes
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"""
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if expected_attrs is None:
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expected_attrs = []
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# NOTE(mriedem): We sort the list so we can have predictable test
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# results.
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return sorted(list(set(self._show_expected_attrs + expected_attrs)))
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def _show_from_down_cell(self, request, instance, show_extra_specs,
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show_server_groups):
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"""Function that constructs the partial response for the instance."""
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ret = {
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"server": {
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"id": instance.uuid,
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"status": "UNKNOWN",
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"tenant_id": instance.project_id,
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"created": utils.isotime(instance.created_at),
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"links": self._get_links(
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request, instance.uuid, self._collection_name),
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},
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}
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if 'flavor' in instance:
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# If the key 'flavor' is present for an instance from a down cell
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# it means that the request is ``GET /servers/{server_id}`` and
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# thus we include the information from the request_spec of the
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# instance like its flavor, image, avz, and user_id in addition to
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# the basic information from its instance_mapping.
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# If 'flavor' key is not present for an instance from a down cell
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# down cell it means the request is ``GET /servers/detail`` and we
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# do not expose the flavor in the response when listing servers
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# with details for performance reasons of fetching it from the
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# request specs table for the whole list of instances.
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ret["server"]["image"] = self._get_image(request, instance)
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ret["server"]["flavor"] = self._get_flavor(request, instance,
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show_extra_specs)
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# in case availability zone was not requested by the user during
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# boot time, return UNKNOWN.
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avz = instance.availability_zone or "UNKNOWN"
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ret["server"]["OS-EXT-AZ:availability_zone"] = avz
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ret["server"]["OS-EXT-STS:power_state"] = instance.power_state
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# in case its an old request spec which doesn't have the user_id
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# data migrated, return UNKNOWN.
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ret["server"]["user_id"] = instance.user_id or "UNKNOWN"
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if show_server_groups:
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context = request.environ['nova.context']
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ret['server']['server_groups'] = self._get_server_groups(
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context, instance)
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return ret
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def show(self, request, instance, extend_address=True,
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show_extra_specs=None, show_AZ=True, show_config_drive=True,
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show_extended_attr=None, show_host_status=None,
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show_keypair=True, show_srv_usg=True, show_sec_grp=True,
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show_extended_status=True, show_extended_volumes=True,
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bdms=None, cell_down_support=False, show_server_groups=False):
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"""Detailed view of a single instance."""
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if show_extra_specs is None:
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# detail will pre-calculate this for us. If we're doing show,
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# then figure it out here.
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show_extra_specs = False
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if api_version_request.is_supported(request, min_version='2.47'):
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context = request.environ['nova.context']
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show_extra_specs = context.can(
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fes_policies.POLICY_ROOT % 'index', fatal=False)
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if cell_down_support and 'display_name' not in instance:
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# NOTE(tssurya): If the microversion is >= 2.69, this boolean will
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# be true in which case we check if there are instances from down
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# cells (by checking if their objects have missing keys like
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# `display_name`) and return partial constructs based on the
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# information available from the nova_api database.
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return self._show_from_down_cell(
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request, instance, show_extra_specs, show_server_groups)
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ip_v4 = instance.get('access_ip_v4')
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ip_v6 = instance.get('access_ip_v6')
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server = {
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"server": {
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"id": instance["uuid"],
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"name": instance["display_name"],
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"status": self._get_vm_status(instance),
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"tenant_id": instance.get("project_id") or "",
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"user_id": instance.get("user_id") or "",
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"metadata": self._get_metadata(instance),
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"hostId": self._get_host_id(instance),
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"image": self._get_image(request, instance),
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"flavor": self._get_flavor(request, instance,
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show_extra_specs),
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"created": utils.isotime(instance["created_at"]),
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"updated": utils.isotime(instance["updated_at"]),
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"addresses": self._get_addresses(request, instance,
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extend_address),
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"accessIPv4": str(ip_v4) if ip_v4 is not None else '',
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"accessIPv6": str(ip_v6) if ip_v6 is not None else '',
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"links": self._get_links(request,
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instance["uuid"],
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self._collection_name),
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# NOTE(sdague): historically this was the
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# os-disk-config extension, but now that extensions
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# are gone, we merge these attributes here.
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"OS-DCF:diskConfig": (
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'AUTO' if instance.get('auto_disk_config') else 'MANUAL'),
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},
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}
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if server["server"]["status"] in self._fault_statuses:
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_inst_fault = self._get_fault(request, instance)
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if _inst_fault:
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server['server']['fault'] = _inst_fault
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if server["server"]["status"] in self._progress_statuses:
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server["server"]["progress"] = instance.get("progress", 0)
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context = request.environ['nova.context']
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if show_AZ:
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az = avail_zone.get_instance_availability_zone(context, instance)
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# NOTE(mriedem): The OS-EXT-AZ prefix should not be used for new
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# attributes after v2.1. They are only in v2.1 for backward compat
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# with v2.0.
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server["server"]["OS-EXT-AZ:availability_zone"] = az or ''
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if show_config_drive:
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server["server"]["config_drive"] = instance["config_drive"]
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if show_keypair:
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server["server"]["key_name"] = instance["key_name"]
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if show_srv_usg:
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for k in ['launched_at', 'terminated_at']:
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key = "OS-SRV-USG:" + k
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# NOTE(danms): Historically, this timestamp has been generated
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# merely by grabbing str(datetime) of a TZ-naive object. The
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# only way we can keep that with instance objects is to strip
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# the tzinfo from the stamp and str() it.
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server["server"][key] = (instance[k].replace(tzinfo=None)
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if instance[k] else None)
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if show_sec_grp:
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self._add_security_grps(request, [server["server"]], [instance])
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if show_extended_attr is None:
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show_extended_attr = context.can(
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esa_policies.BASE_POLICY_NAME, fatal=False)
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if show_extended_attr:
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properties = ['host', 'name', 'node']
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if api_version_request.is_supported(request, min_version='2.3'):
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# NOTE(mriedem): These will use the OS-EXT-SRV-ATTR prefix
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# below and that's OK for microversion 2.3 which is being
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# compatible with v2.0 for the ec2 API split out from Nova.
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# After this, however, new microversions should not be using
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# the OS-EXT-SRV-ATTR prefix.
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properties += ['reservation_id', 'launch_index',
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'hostname', 'kernel_id', 'ramdisk_id',
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'root_device_name', 'user_data']
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for attr in properties:
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if attr == 'name':
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key = "OS-EXT-SRV-ATTR:instance_%s" % attr
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elif attr == 'node':
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key = "OS-EXT-SRV-ATTR:hypervisor_hostname"
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else:
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# NOTE(mriedem): Nothing after microversion 2.3 should use
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# the OS-EXT-SRV-ATTR prefix for the attribute key name.
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key = "OS-EXT-SRV-ATTR:%s" % attr
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server["server"][key] = getattr(instance, attr)
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if show_extended_status:
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# NOTE(gmann): Removed 'locked_by' from extended status
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# to make it same as V2. If needed it can be added with
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# microversion.
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for state in ['task_state', 'vm_state', 'power_state']:
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# NOTE(mriedem): The OS-EXT-STS prefix should not be used for
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# new attributes after v2.1. They are only in v2.1 for backward
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# compat with v2.0.
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key = "%s:%s" % ('OS-EXT-STS', state)
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server["server"][key] = instance[state]
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if show_extended_volumes:
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# NOTE(mriedem): The os-extended-volumes prefix should not be used
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# for new attributes after v2.1. They are only in v2.1 for backward
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# compat with v2.0.
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add_delete_on_termination = api_version_request.is_supported(
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request, min_version='2.3')
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if bdms is None:
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bdms = objects.BlockDeviceMappingList.bdms_by_instance_uuid(
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context, [instance["uuid"]])
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self._add_volumes_attachments(server["server"],
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bdms,
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add_delete_on_termination)
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if (api_version_request.is_supported(request, min_version='2.16')):
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if show_host_status is None:
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show_host_status = context.can(
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servers_policies.SERVERS % 'show:host_status', fatal=False)
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if show_host_status:
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host_status = self.compute_api.get_instance_host_status(
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instance)
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server["server"]['host_status'] = host_status
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if api_version_request.is_supported(request, min_version="2.9"):
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server["server"]["locked"] = (True if instance["locked_by"]
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else False)
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if api_version_request.is_supported(request, min_version="2.73"):
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server["server"]["locked_reason"] = (instance.system_metadata.get(
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"locked_reason"))
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if api_version_request.is_supported(request, min_version="2.19"):
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server["server"]["description"] = instance.get(
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"display_description")
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if api_version_request.is_supported(request, min_version="2.26"):
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server["server"]["tags"] = [t.tag for t in instance.tags]
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if api_version_request.is_supported(request, min_version="2.63"):
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trusted_certs = None
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if instance.trusted_certs:
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trusted_certs = instance.trusted_certs.ids
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server["server"]["trusted_image_certificates"] = trusted_certs
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if show_server_groups:
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server['server']['server_groups'] = self._get_server_groups(
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context,
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instance)
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return server
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def index(self, request, instances, cell_down_support=False):
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"""Show a list of servers without many details."""
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coll_name = self._collection_name
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return self._list_view(self.basic, request, instances, coll_name,
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False, cell_down_support=cell_down_support)
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def detail(self, request, instances, cell_down_support=False):
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"""Detailed view of a list of instance."""
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coll_name = self._collection_name + '/detail'
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context = request.environ['nova.context']
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if api_version_request.is_supported(request, min_version='2.47'):
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# Determine if we should show extra_specs in the inlined flavor
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# once before we iterate the list of instances
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show_extra_specs = context.can(fes_policies.POLICY_ROOT % 'index',
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fatal=False)
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else:
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show_extra_specs = False
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show_extended_attr = context.can(
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esa_policies.BASE_POLICY_NAME, fatal=False)
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instance_uuids = [inst['uuid'] for inst in instances]
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bdms = self._get_instance_bdms_in_multiple_cells(context,
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instance_uuids)
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# NOTE(gmann): pass show_sec_grp=False in _list_view() because
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# security groups for detail method will be added by separate
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# call to self._add_security_grps by passing the all servers
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# together. That help to avoid multiple neutron call for each server.
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servers_dict = self._list_view(self.show, request, instances,
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coll_name, show_extra_specs,
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show_extended_attr=show_extended_attr,
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# We process host_status in aggregate.
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show_host_status=False,
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show_sec_grp=False,
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bdms=bdms,
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cell_down_support=cell_down_support)
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if (api_version_request.is_supported(request, min_version='2.16') and
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context.can(servers_policies.SERVERS % 'show:host_status',
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fatal=False)):
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self._add_host_status(list(servers_dict["servers"]), instances)
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self._add_security_grps(request, list(servers_dict["servers"]),
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instances)
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return servers_dict
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def _list_view(self, func, request, servers, coll_name, show_extra_specs,
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show_extended_attr=None, show_host_status=None,
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show_sec_grp=False, bdms=None, cell_down_support=False):
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"""Provide a view for a list of servers.
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:param func: Function used to format the server data
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:param request: API request
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:param servers: List of servers in dictionary format
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:param coll_name: Name of collection, used to generate the next link
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for a pagination query
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:param show_extended_attr: If the server extended attributes should be
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included in the response dict.
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:param show_host_status: If the host status should be included in
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the response dict.
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:param show_sec_grp: If the security group should be included in
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the response dict.
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:param bdms: Instances bdms info from multiple cells.
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:param cell_down_support: True if the API (and caller) support
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returning a minimal instance
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construct if the relevant cell is
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down.
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:returns: Server data in dictionary format
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"""
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server_list = [func(request, server,
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show_extra_specs=show_extra_specs,
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show_extended_attr=show_extended_attr,
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show_host_status=show_host_status,
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show_sec_grp=show_sec_grp, bdms=bdms,
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cell_down_support=cell_down_support)["server"]
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for server in servers
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# Filter out the fake marker instance created by the
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# fill_virtual_interface_list online data migration.
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if server.uuid != virtual_interface.FAKE_UUID]
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servers_links = self._get_collection_links(request,
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servers,
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coll_name)
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servers_dict = dict(servers=server_list)
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if servers_links:
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servers_dict["servers_links"] = servers_links
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return servers_dict
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@staticmethod
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def _get_metadata(instance):
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return instance.metadata or {}
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@staticmethod
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def _get_vm_status(instance):
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# If the instance is deleted the vm and task states don't really matter
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if instance.get("deleted"):
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return "DELETED"
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return common.status_from_state(instance.get("vm_state"),
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instance.get("task_state"))
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@staticmethod
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def _get_host_id(instance):
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host = instance.get("host")
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project = str(instance.get("project_id"))
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return utils.generate_hostid(host, project)
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def _get_addresses(self, request, instance, extend_address=False):
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# Hide server addresses while the server is building.
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if instance.vm_state == vm_states.BUILDING:
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return {}
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context = request.environ["nova.context"]
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networks = common.get_networks_for_instance(context, instance)
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return self._address_builder.index(networks,
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extend_address)["addresses"]
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def _get_image(self, request, instance):
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image_ref = instance["image_ref"]
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if image_ref:
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image_id = str(common.get_id_from_href(image_ref))
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bookmark = self._image_builder._get_bookmark_link(request,
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image_id,
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"images")
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return {
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"id": image_id,
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"links": [{
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"rel": "bookmark",
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"href": bookmark,
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}],
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}
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else:
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return ""
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def _get_flavor_dict(self, request, instance_type, show_extra_specs):
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flavordict = {
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"vcpus": instance_type.vcpus,
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"ram": instance_type.memory_mb,
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"disk": instance_type.root_gb,
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"ephemeral": instance_type.ephemeral_gb,
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"swap": instance_type.swap,
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"original_name": instance_type.name
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}
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if show_extra_specs:
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flavordict['extra_specs'] = instance_type.extra_specs
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return flavordict
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def _get_flavor(self, request, instance, show_extra_specs):
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instance_type = instance.get_flavor()
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if not instance_type:
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LOG.warning("Instance has had its instance_type removed "
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"from the DB", instance=instance)
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return {}
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if api_version_request.is_supported(request, min_version="2.47"):
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return self._get_flavor_dict(request, instance_type,
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show_extra_specs)
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flavor_id = instance_type["flavorid"]
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flavor_bookmark = self._flavor_builder._get_bookmark_link(request,
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flavor_id,
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"flavors")
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return {
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"id": str(flavor_id),
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"links": [{
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"rel": "bookmark",
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"href": flavor_bookmark,
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}],
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}
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def _load_fault(self, request, instance):
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try:
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mapping = objects.InstanceMapping.get_by_instance_uuid(
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request.environ['nova.context'], instance.uuid)
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if mapping.cell_mapping is not None:
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with nova_context.target_cell(instance._context,
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mapping.cell_mapping):
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return instance.fault
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except exception.InstanceMappingNotFound:
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pass
|
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|
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# NOTE(danms): No instance mapping at all, or a mapping with no cell,
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# which means a legacy environment or instance.
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return instance.fault
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|
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def _get_fault(self, request, instance):
|
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if 'fault' in instance:
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fault = instance.fault
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else:
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fault = self._load_fault(request, instance)
|
|
|
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if not fault:
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return None
|
|
|
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fault_dict = {
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"code": fault["code"],
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"created": utils.isotime(fault["created_at"]),
|
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"message": fault["message"],
|
|
}
|
|
|
|
if fault.get('details', None):
|
|
is_admin = False
|
|
context = request.environ["nova.context"]
|
|
if context:
|
|
is_admin = getattr(context, 'is_admin', False)
|
|
|
|
if is_admin or fault['code'] != 500:
|
|
fault_dict['details'] = fault["details"]
|
|
|
|
return fault_dict
|
|
|
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def _add_host_status(self, servers, instances):
|
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"""Adds the ``host_status`` field to the list of servers
|
|
|
|
This method takes care to filter instances from down cells since they
|
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do not have a host set and as such we cannot determine the host status.
|
|
|
|
:param servers: list of detailed server dicts for the API response
|
|
body; this list is modified by reference by updating the server
|
|
dicts within the list
|
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:param instances: list of Instance objects
|
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"""
|
|
# Filter out instances from down cells which do not have a host field.
|
|
instances = [instance for instance in instances if 'host' in instance]
|
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# Get the dict, keyed by instance.uuid, of host status values.
|
|
host_statuses = self.compute_api.get_instances_host_statuses(instances)
|
|
for server in servers:
|
|
# Filter out anything that is not in the resulting dict because
|
|
# we had to filter the list of instances above for down cells.
|
|
if server['id'] in host_statuses:
|
|
server['host_status'] = host_statuses[server['id']]
|
|
|
|
def _add_security_grps(self, req, servers, instances):
|
|
if not len(servers):
|
|
return
|
|
if not openstack_driver.is_neutron_security_groups():
|
|
instances = {inst['uuid']: inst for inst in instances}
|
|
for server in servers:
|
|
instance = instances[server['id']]
|
|
groups = instance.get('security_groups')
|
|
if groups:
|
|
server['security_groups'] = [{"name": group.name}
|
|
for group in groups]
|
|
else:
|
|
# If method is a POST we get the security groups intended for an
|
|
# instance from the request. The reason for this is if using
|
|
# neutron security groups the requested security groups for the
|
|
# instance are not in the db and have not been sent to neutron yet.
|
|
if req.method != 'POST':
|
|
context = req.environ['nova.context']
|
|
sg_instance_bindings = (
|
|
self.security_group_api
|
|
.get_instances_security_groups_bindings(context,
|
|
servers))
|
|
for server in servers:
|
|
groups = sg_instance_bindings.get(server['id'])
|
|
if groups:
|
|
server['security_groups'] = groups
|
|
|
|
# This section is for POST request. There can be only one security
|
|
# group for POST request.
|
|
else:
|
|
# try converting to json
|
|
req_obj = jsonutils.loads(req.body)
|
|
# Add security group to server, if no security group was in
|
|
# request add default since that is the group it is part of
|
|
servers[0]['security_groups'] = req_obj['server'].get(
|
|
'security_groups', [{'name': 'default'}])
|
|
|
|
@staticmethod
|
|
def _get_instance_bdms_in_multiple_cells(ctxt, instance_uuids):
|
|
inst_maps = objects.InstanceMappingList.get_by_instance_uuids(
|
|
ctxt, instance_uuids)
|
|
|
|
cell_mappings = {}
|
|
for inst_map in inst_maps:
|
|
if (inst_map.cell_mapping is not None and
|
|
inst_map.cell_mapping.uuid not in cell_mappings):
|
|
cell_mappings.update(
|
|
{inst_map.cell_mapping.uuid: inst_map.cell_mapping})
|
|
|
|
bdms = {}
|
|
results = nova_context.scatter_gather_cells(
|
|
ctxt, cell_mappings.values(),
|
|
nova_context.CELL_TIMEOUT,
|
|
objects.BlockDeviceMappingList.bdms_by_instance_uuid,
|
|
instance_uuids)
|
|
for cell_uuid, result in results.items():
|
|
if isinstance(result, Exception):
|
|
LOG.warning('Failed to get block device mappings for cell %s',
|
|
cell_uuid)
|
|
elif result is nova_context.did_not_respond_sentinel:
|
|
LOG.warning('Timeout getting block device mappings for cell '
|
|
'%s', cell_uuid)
|
|
else:
|
|
bdms.update(result)
|
|
return bdms
|
|
|
|
def _add_volumes_attachments(self, server, bdms,
|
|
add_delete_on_termination):
|
|
# server['id'] is guaranteed to be in the cache due to
|
|
# the core API adding it in the 'detail' or 'show' method.
|
|
# If that instance has since been deleted, it won't be in the
|
|
# 'bdms' dictionary though, so use 'get' to avoid KeyErrors.
|
|
instance_bdms = bdms.get(server['id'], [])
|
|
volumes_attached = []
|
|
for bdm in instance_bdms:
|
|
if bdm.get('volume_id'):
|
|
volume_attached = {'id': bdm['volume_id']}
|
|
if add_delete_on_termination:
|
|
volume_attached['delete_on_termination'] = (
|
|
bdm['delete_on_termination'])
|
|
volumes_attached.append(volume_attached)
|
|
# NOTE(mriedem): The os-extended-volumes prefix should not be used for
|
|
# new attributes after v2.1. They are only in v2.1 for backward compat
|
|
# with v2.0.
|
|
key = "os-extended-volumes:volumes_attached"
|
|
server[key] = volumes_attached
|
|
|
|
@staticmethod
|
|
def _get_server_groups(context, instance):
|
|
try:
|
|
sg = objects.InstanceGroup.get_by_instance_uuid(context,
|
|
instance.uuid)
|
|
return [sg.uuid]
|
|
except exception.InstanceGroupNotFound:
|
|
return []
|