diff --git a/nova/tests/unit/volume/encryptors/test_cryptsetup.py b/nova/tests/unit/volume/encryptors/test_cryptsetup.py
index ec9beadd1..5e523068c 100644
--- a/nova/tests/unit/volume/encryptors/test_cryptsetup.py
+++ b/nova/tests/unit/volume/encryptors/test_cryptsetup.py
@@ -17,7 +17,9 @@
 import array
 
 import mock
+import six
 
+from nova import exception
 from nova.keymgr import key
 from nova.tests.unit.volume.encryptors import test_base
 from nova.volume.encryptors import cryptsetup
@@ -89,3 +91,14 @@ class CryptsetupEncryptorTestCase(test_base.VolumeEncryptorTestCase):
                       run_as_root=True, check_exit_code=True),
         ])
         self.assertEqual(1, mock_execute.call_count)
+
+    def test_init_volume_encryption_not_supported(self):
+        # Tests that creating a CryptsetupEncryptor fails if there is no
+        # device_path key.
+        type = 'unencryptable'
+        data = dict(volume_id='a194699b-aa07-4433-a945-a5d23802043e')
+        connection_info = dict(driver_volume_type=type, data=data)
+        exc = self.assertRaises(exception.VolumeEncryptionNotSupported,
+                                cryptsetup.CryptsetupEncryptor,
+                                connection_info)
+        self.assertIn(type, six.text_type(exc))
diff --git a/nova/volume/encryptors/cryptsetup.py b/nova/volume/encryptors/cryptsetup.py
index a4343a1cb..3b5bcadd5 100644
--- a/nova/volume/encryptors/cryptsetup.py
+++ b/nova/volume/encryptors/cryptsetup.py
@@ -18,6 +18,7 @@ import os
 
 from oslo_log import log as logging
 
+from nova import exception
 from nova import utils
 from nova.volume.encryptors import base
 
@@ -34,6 +35,15 @@ class CryptsetupEncryptor(base.VolumeEncryptor):
     def __init__(self, connection_info, **kwargs):
         super(CryptsetupEncryptor, self).__init__(connection_info, **kwargs)
 
+        # Fail if no device_path was set when connecting the volume, e.g. in
+        # the case of libvirt network volume drivers.
+        data = connection_info['data']
+        if not data.get('device_path'):
+            volume_id = data.get('volume_id') or connection_info.get('serial')
+            raise exception.VolumeEncryptionNotSupported(
+                volume_id=volume_id,
+                volume_type=connection_info['driver_volume_type'])
+
         # the device's path as given to libvirt -- e.g., /dev/disk/by-path/...
         self.symlink_path = connection_info['data']['device_path']