Fix for NexentaEdge jsonrpc url formatting

LOG.info if the volume is already deleted on appliance instead of
raising an error.
Convert nexenta_blocksize to str before sending request.
Changed the chunksize default to recommended value of 32768.

Change-Id: I3f8d7c668450972e336450488b75ce2ab7d78ba1

cinder/tests/unit/test_nexenta_edge.py

@@ -17,6 +17,7 @@
 import mock
 
 from cinder import context
+from cinder import exception
 from cinder import test
 from cinder.volume import configuration as conf
 from cinder.volume.drivers.nexenta.nexentaedge import iscsi
@@ -97,6 +98,8 @@ class TestNexentaEdgeISCSIDriver(test.TestCase):
         self.assertRaises(RuntimeError, self.driver.create_volume, MOCK_VOL)
 
     def test_delete_volume(self):
+        self.mock_api.side_effect = exception.VolumeBackendAPIException(
+            'No volume')
         self.driver.delete_volume(MOCK_VOL)
         self.mock_api.assert_called_with(NEDGE_URL, {
             'objectPath': NEDGE_BUCKET + '/' + MOCK_VOL['id']

cinder/volume/drivers/nexenta/iscsi.py

@@ -17,6 +17,7 @@
 
 .. automodule:: nexenta.iscsi
 """
+import six
 
 from oslo_log import log as logging
 from oslo_utils import excutils
@@ -214,7 +215,7 @@ class NexentaISCSIDriver(driver.ISCSIDriver):
         self.nms.zvol.create(
             self._get_zvol_name(volume['name']),
             '%sG' % (volume['size'],),
-            self.configuration.nexenta_blocksize,
+            six.text_type(self.configuration.nexenta_blocksize),
             self.configuration.nexenta_sparse)
 
     def extend_volume(self, volume, new_size):

cinder/volume/drivers/nexenta/nexentaedge/iscsi.py

@@ -20,7 +20,7 @@ from oslo_utils import excutils
 from oslo_utils import units
 
 from cinder import exception
-from cinder.i18n import _, _LE
+from cinder.i18n import _, _LE, _LI
 from cinder.volume import driver
 from cinder.volume.drivers.nexenta.nexentaedge import jsonrpc
 from cinder.volume.drivers.nexenta import options
@@ -164,8 +164,9 @@ class NexentaEdgeISCSIDriver(driver.ISCSIDriver):
                                 '/iscsi', {'objectPath': self.bucket_path +
                                            '/' + volume['name']})
         except exception.VolumeBackendAPIException:
-            with excutils.save_and_reraise_exception():
-                LOG.exception(_LE('Error deleting volume'))
+            LOG.info(
+                _LI('Volume was already deleted from appliance, skipping.'),
+                resource=volume)
 
     def extend_volume(self, volume, new_size):
         try:

cinder/volume/drivers/nexenta/nexentaedge/jsonrpc.py

@@ -47,8 +47,8 @@ class NexentaEdgeJSONProxy(object):
 
     @property
     def url(self):
-        return '%s://%s:%s%s' % (self.protocol,
-                                 self.host, self.port, self.path)
+        return '%s://%s:%s/%s' % (self.protocol,
+                                  self.host, self.port, self.path)
 
     def __getattr__(self, name):
         if not self.method:
@@ -68,7 +68,7 @@ class NexentaEdgeJSONProxy(object):
 
     @retry(retry_exc_tuple, interval=1, retries=6)
     def __call__(self, *args):
-        self.path += args[0]
+        self.path = args[0]
         data = None
         if len(args) > 1:
             data = json.dumps(args[1])
@@ -79,7 +79,7 @@ class NexentaEdgeJSONProxy(object):
             'Authorization': 'Basic %s' % auth
         }
 
-        LOG.debug('Sending JSON data: %s', self.url)
+        LOG.debug('Sending JSON data: %s, data: %s', self.url, data)
 
         if self.method == 'get':
             req = requests.get(self.url, headers=headers)

cinder/volume/drivers/nexenta/options.py

@@ -44,7 +44,7 @@ NEXENTA_EDGE_OPTS = [
                help='NexentaEdge iSCSI Gateway client '
                'address for non-VIP service'),
     cfg.IntOpt('nexenta_chunksize',
-               default=16384,
+               default=32768,
                help='NexentaEdge iSCSI LUN object chunk size')
 ]