VStorage: make logging path configurable

Logging path can now be configured in shares config file.
When it's not set, the default logging path is appended
to mount options.

Also default logging path is changed because of:
When VStorage package is installed, default logging
path /var/log/vstorage is created. So this should
be a default value for logging path. Otherwise
user is forced to create logging path manually,
because share mount will fail.

Change-Id: Iba837bdd6bbf991d91f43f61f62fffebbc1877ae
Signed-off-by: Pavel Glushchak <pglushchak@virtuozzo.com>

cinder/tests/unit/volume/drivers/test_vzstorage.py

@@ -56,10 +56,6 @@ class VZStorageTestCase(test.TestCase):
     def setUp(self):
         super(VZStorageTestCase, self).setUp()
 
-        self._remotefsclient = mock.patch.object(
-            remotefs, 'VZStorageRemoteFSClient').start()
-        get_mount_point = mock.Mock(return_value=self._FAKE_MNT_POINT)
-        self._remotefsclient.get_mount_point = get_mount_point
         cfg = copy.copy(self._FAKE_VZ_CONFIG)
         self._vz_driver = vzstorage.VZStorageDriver(configuration=cfg)
         self._vz_driver._local_volume_dir = mock.Mock(
@@ -168,12 +164,26 @@ class VZStorageTestCase(test.TestCase):
         self.assertRaises(exception.VzStorageException,
                           self._vz_driver._ensure_share_mounted, ':')
 
-    def test_ensure_share_mounted(self):
+    @mock.patch.object(remotefs.RemoteFsClient, 'mount')
+    def test_ensure_share_mounted(self, mock_mount):
         drv = self._vz_driver
-        share = self._FAKE_SHARE
-        drv.shares = {'1': '["1", "2", "3"]', share: '["some", "options"]'}
+        share = 'test'
+        expected_calls = [
+            mock.call(share, ['-u', 'cinder', '-g', 'root', '-l',
+                              '/var/log/vstorage/%s/cinder.log.gz' % share]),
+            mock.call(share, ['-l', '/var/log/dummy.log'])
+        ]
+
+        share_flags = '["-u", "cinder", "-g", "root"]'
+        drv.shares[share] = share_flags
         drv._ensure_share_mounted(share)
 
+        share_flags = '["-l", "/var/log/dummy.log"]'
+        drv.shares[share] = share_flags
+        drv._ensure_share_mounted(share)
+
+        mock_mount.assert_has_calls(expected_calls)
+
     def test_find_share(self):
         drv = self._vz_driver
         drv._mounted_shares = [self._FAKE_SHARE]

cinder/volume/drivers/vzstorage.py

@@ -300,13 +300,19 @@ class VZStorageDriver(remotefs_drv.RemoteFSSnapDriver):
             raise exception.VzStorageException(msg)
         cluster_name = m.group(2)
 
-        # set up logging to non-default path, so that it will
-        # be possible to mount the same cluster to another mount
-        # point by hand with default options.
-        mnt_flags = ['-l', '/var/log/pstorage/%s-cinder.log.gz' % cluster_name]
-        if self.shares.get(share) is not None:
-            extra_flags = json.loads(self.shares[share])
-            mnt_flags.extend(extra_flags)
+        if share in self.shares:
+            mnt_flags = json.loads(self.shares[share])
+        else:
+            mnt_flags = []
+
+        if '-l' not in mnt_flags:
+            # If logging path is not specified in shares config
+            # set up logging to non-default path, so that it will
+            # be possible to mount the same cluster to another mount
+            # point by hand with default options.
+            mnt_flags.extend([
+                '-l', '/var/log/vstorage/%s/cinder.log.gz' % cluster_name])
+
         self._remotefsclient.mount(share, mnt_flags)
 
     def _find_share(self, volume):

releasenotes/notes/vzstorage-log-path-7539342e562a2e4a.yaml

@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    Logging path can now be configured for vzstorage driver in
+    shares config file (specified by vzstorage_shares_config option).
+    To set custom logging path add `'-l', '<path_to_log_file>'` to
+    mount options array. Otherwise default logging path
+    `/var/log/vstorage/<cluster_name>/cinder.log.gz` will be used.