Remove dependency on novaclient list_extensions API

The novaclient list_extensions API binding was removed in the
16.0.0 release [1]. The ability to enable/disable extensions
in nova has been deprecated since Liberty [2] and was removed
in Newton [3].

For horizon this only matters for the OPENSTACK_NOVA_EXTENSIONS_BLACKLIST
config setting and some javascript code used to compile panels based on
enabled extensions. In order to work with novaclient 16.0.0+, this
change removes the list_extensions usage since all extensions
are enabled in nova and thus for horizon a nova extension is only
not supported if it's in the configured blacklist. To continue supporting
the javascript code which uses the getExtensions function, the extension
names are hard-coded. Note that the method meant to test that code,
_test_extension_list, was wrong but never ran because of the underscore
prefix on the method name. That is fixed here.

[1] https://review.opendev.org/686516/
[2] https://review.opendev.org/214592/
[3] https://review.opendev.org/351362/

Change-Id: Iebb1e78c718b931d632445e4de6d7a29ccb92be2
Closes-Bug: #1847959

openstack_dashboard/api/nova.py

@@ -30,7 +30,6 @@ from django.utils.translation import ugettext_lazy as _
 from novaclient import api_versions
 from novaclient import exceptions as nova_exceptions
 from novaclient.v2 import instance_action as nova_instance_action
-from novaclient.v2 import list_extensions as nova_list_extensions
 from novaclient.v2 import servers as nova_servers
 
 from horizon import exceptions as horizon_exceptions
@@ -49,6 +48,113 @@ INSTANCE_ACTIVE_STATE = 'ACTIVE'
 VOLUME_STATE_AVAILABLE = "available"
 DEFAULT_QUOTA_NAME = 'default'
 
+# python-novaclient 16.0.0 removed the list_extensions module and the
+# GET /extensions API is deprecated since Newton. Furthermore, the ability
+# to enable/disable compute API extensions was also removed in Newton.
+# Therefore we hard-code the list of extensions here until the
+# OPENSTACK_NOVA_EXTENSIONS_BLACKLIST setting is no longer used.
+EXTENSIONS = (
+    'AccessIPs',
+    'AdminActions',
+    'AdminPassword',
+    'Agents',
+    'Aggregates',
+    'AssistedVolumeSnapshots',
+    'AttachInterfaces',
+    'AvailabilityZone',
+    'BareMetalExtStatus',
+    'BareMetalNodes',
+    'BlockDeviceMapping',
+    'BlockDeviceMappingV2Boot',
+    'CellCapacities',
+    'Cells',
+    'Certificates',
+    'Cloudpipe',
+    'CloudpipeUpdate',
+    'ConfigDrive',
+    'ConsoleAuthTokens',
+    'ConsoleOutput',
+    'Consoles',
+    'CreateBackup',
+    'Createserverext',
+    'DeferredDelete',
+    'DiskConfig',
+    'Evacuate',
+    'ExtendedAvailabilityZone',
+    'ExtendedEvacuateFindHost',
+    'ExtendedFloatingIps',
+    'ExtendedHypervisors',
+    'ExtendedIps',
+    'ExtendedIpsMac',
+    'ExtendedNetworks',
+    'ExtendedQuotas',
+    'ExtendedRescueWithImage',
+    'ExtendedServerAttributes',
+    'ExtendedServices',
+    'ExtendedServicesDelete',
+    'ExtendedStatus',
+    'ExtendedStatus',
+    'ExtendedVolumes',
+    'FixedIPs',
+    'FlavorAccess',
+    'FlavorDisabled',
+    'FlavorExtraData',
+    'FlavorExtraSpecs',
+    'FlavorManage',
+    'FlavorRxtx',
+    'FlavorSwap',
+    'FloatingIpDns',
+    'FloatingIpPools',
+    'FloatingIps',
+    'FloatingIpsBulk',
+    'Fping',
+    'HideServerAddresses',
+    'Hosts',
+    'HypervisorStatus',
+    'Hypervisors',
+    'ImageSize',
+    'InstanceActions',
+    'Keypairs',
+    'LockServer',
+    'MigrateServer',
+    'Migrations',
+    'Multinic',
+    'MultipleCreate',
+    'NetworkAssociationSupport',
+    'Networks',
+    'OSInstanceUsageAuditLog',
+    'OSTenantNetworks',
+    'PauseServer',
+    'Personality',
+    'PreserveEphemeralOnRebuild',
+    'QuotaClasses',
+    'Quotas',
+    'Rescue',
+    'SchedulerHints',
+    'SecurityGroupDefaultRules',
+    'SecurityGroups',
+    'ServerDiagnostics',
+    'ServerExternalEvents',
+    'ServerGroupQuotas',
+    'ServerGroups',
+    'ServerListMultiStatus',
+    'ServerPassword',
+    'ServerSortKeys',
+    'ServerStartStop',
+    'ServerUsage',
+    'Services',
+    'Shelve',
+    'SimpleTenantUsage',
+    'SuspendServer',
+    'UsedLimits',
+    'UsedLimitsForAdmin',
+    'UserData',
+    'UserQuotas',
+    'VirtualInterfaces',
+    'VolumeAttachmentUpdate',
+    'Volumes'
+)
+
 
 get_microversion = _nova.get_microversion
 server_get = _nova.server_get
@@ -1010,13 +1116,10 @@ def interface_detach(request, server, port_id):
 @profiler.trace
 @memoized.memoized
 def list_extensions(request):
-    """List all nova extensions, except the ones in the blacklist."""
+    """List all nova extension names, except the ones in the blacklist."""
     blacklist = set(settings.OPENSTACK_NOVA_EXTENSIONS_BLACKLIST)
-    nova_api = _nova.novaclient(request)
     return tuple(
-        extension for extension in
-        nova_list_extensions.ListExtManager(nova_api).show_all()
-        if extension.name not in blacklist
+        extension for extension in EXTENSIONS if extension not in blacklist
     )
 
 
@@ -1028,10 +1131,7 @@ def extension_supported(extension_name, request):
     Example values for the extension_name include AdminActions, ConsoleOutput,
     etc.
     """
-    for ext in list_extensions(request):
-        if ext.name == extension_name:
-            return True
-    return False
+    return extension_name in list_extensions(request)
 
 
 @profiler.trace

openstack_dashboard/api/rest/nova.py

@@ -512,13 +512,13 @@ class Extensions(generic.View):
         """Get a list of extensions.
 
         The listing result is an object with property "items". Each item is
-        an image.
+        an object with property "name".
 
         Example GET:
         http://localhost/api/nova/extensions
         """
         result = api.nova.list_extensions(request)
-        return {'items': [e.to_dict() for e in result]}
+        return {'items': [{'name': e} for e in result]}
 
 
 @urls.register

openstack_dashboard/static/app/core/openstack-service-api/nova.service.js

@@ -548,12 +548,7 @@
      *  {
      *    "items": [
      *      {
-     *        "alias": "NMN",
-     *        "description": "Multiple network support.",
-     *        "links": [],
-     *        "name": "Multinic",
-     *        "namespace": "http://docs.openstack.org/compute/ext/multinic/api/v1.1",
-     *        "updated": "2011-06-09T00:00:00Z"
+     *        "name": "Multinic"
      *      }
      *    ]
      *  }

openstack_dashboard/test/unit/api/rest/test_nova.py

@@ -487,15 +487,9 @@ class NovaRestTestCase(test.TestCase):
     # Extensions
     #
     @test.create_mocks({api.nova: ['list_extensions']})
-    @mock.patch.object(settings,
-                       'OPENSTACK_NOVA_EXTENSIONS_BLACKLIST', ['baz'])
-    def _test_extension_list(self):
+    def test_extension_list(self):
         request = self.mock_rest_request()
-        self.mock_list_extensions.return_value = [
-            mock.Mock(**{'to_dict.return_value': {'name': 'foo'}}),
-            mock.Mock(**{'to_dict.return_value': {'name': 'bar'}}),
-            mock.Mock(**{'to_dict.return_value': {'name': 'baz'}}),
-        ]
+        self.mock_list_extensions.return_value = ['foo', 'bar']
         response = nova.Extensions().get(request)
         self.assertStatusCode(response, 200)
         self.assertEqual({"items": [{"name": "foo"}, {"name": "bar"}]},

openstack_dashboard/test/unit/api/test_nova.py

@@ -72,6 +72,15 @@ class ComputeApiTests(test.APIMockTestCase):
         # To handle upgrade_api
         mock_novaclient.api_version = api_versions.APIVersion(version)
 
+    @override_settings(OPENSTACK_NOVA_EXTENSIONS_BLACKLIST=['ConsoleOutput'])
+    def test_extension_supported(self):
+        self.assertTrue(api.nova.extension_supported(
+            'Evacuate', mock.sentinel.request))
+        self.assertFalse(api.nova.extension_supported(
+            'ConsoleOutput', mock.sentinel.request))
+        self.assertFalse(api.nova.extension_supported(
+            'DoesNotExist', mock.sentinel.request))
+
     @mock.patch.object(api._nova, 'novaclient')
     def test_server_reboot(self, mock_novaclient):
         server = self.servers.first()