Add unit tests to verify block storage

Verify that the configuration between LXD and nova is
correct when attaching a block device to an instance.

Change-Id: I04da36ae4bf288e638e78a0d66eccd776756bea1
Signed-off-by: Chuck Short <chuck.short@canonical.com>

nova_lxd_tempest_plugin/tests/api/compute/volumes/test_attach_volume.py

@@ -0,0 +1,106 @@
+# Copyright 2012 OpenStack Foundation
+# Copyright 2016 Canonical Ltd
+# All Rights Reserved.
+#
+#    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.
+
+from pylxd import client
+
+from tempest.api.compute import base
+from tempest.common.utils import data_utils
+from tempest.common import waiters
+from tempest import config
+from tempest import test
+
+CONF = config.CONF
+
+
+class LXDVolumeTests(base.BaseV2ComputeAdminTest):
+    disk_config = 'AUTO'
+
+    def __init__(self, *args, **kwargs):
+        super(LXDVolumeTests, self).__init__(*args, **kwargs)
+        self.attachment = None
+        self.client = client.Client()
+
+    @classmethod
+    def setup_credentials(cls):
+        cls.prepare_instance_network()
+        super(LXDVolumeTests, cls).setup_credentials()
+
+    @classmethod
+    def setup_clients(cls):
+        super(LXDVolumeTests, cls).setup_clients()
+        cls.client = cls.os_adm.servers_client
+        cls.flavors_client = cls.os_adm.flavors_client
+
+    @classmethod
+    def resource_setup(cls):
+        cls.set_validation_resources()
+        super(LXDVolumeTests, cls).resource_setup()
+        cls.meta = {'hello': 'world'}
+        cls.accessIPv4 = '1.1.1.1'
+        cls.accessIPv6 = '0000:0000:0000:0000:0000:babe:220.12.22.2'
+        cls.name = data_utils.rand_name(cls.__name__ + '-server')
+        cls.password = data_utils.rand_password()
+        disk_config = cls.disk_config
+        cls.server_initial = cls.create_test_server(
+            validatable=True,
+            wait_until='ACTIVE',
+            name=cls.name,
+            metadata=cls.meta,
+            accessIPv4=cls.accessIPv4,
+            accessIPv6=cls.accessIPv6,
+            disk_config=disk_config,
+            adminPass=cls.password)
+        cls.server = (
+            cls.client.show_server(cls.server_initial['id'])['server'])
+        cls.device = CONF.compute.volume_device_name
+
+    def _detach(self, server_id, volume_id):
+        if self.attachment:
+            self.servers_client.detach_volume(server_id, volume_id)
+            waiters.wait_for_volume_status(self.volumes_client,
+                                           volume_id, 'available')
+
+    def _create_and_attach_volume(self, server):
+        # Create a volume and wait for it to become ready
+        vol_name = data_utils.rand_name(self.__class__.__name__ + '-volume')
+        volume = self.volumes_client.create_volume(
+            size=CONF.volume.volume_size, display_name=vol_name)['volume']
+        self.addCleanup(self.delete_volume, volume['id'])
+        waiters.wait_for_volume_status(self.volumes_client,
+                                       volume['id'], 'available')
+
+        # Attach the volume to the server
+        self.attachment = self.servers_client.attach_volume(
+            server['id'],
+            volumeId=volume['id'],
+            device='/dev/%s' % self.device)['volumeAttachment']
+        waiters.wait_for_volume_status(self.volumes_client,
+                                       volume['id'], 'in-use')
+
+        self.addCleanup(self._detach, server['id'], volume['id'])
+        return volume
+
+    def test_create_server_and_attach_volume(self):
+        # Verify that LXD profile has the correct configuration
+        # for volumes
+        volume = self._create_and_attach_volume(self.server)
+
+        profile = self.client.profiles.get(
+            self.server['OS-EXT-SRV-ATTR:instance_name'])
+
+        self.assertIn(volume['id'], [device for device in profile.devices])
+        self.assertEqual(
+            '/dev/%s' % self.device, profile.devices[volume['id']]['path'])