Set configured_ip_versions fact in cephfs driver

Without it, we lose the memoization optimization
in the "get_configured_ip_versions" method, and
cause a warning log to be emitted one too many
times than desired.

Change-Id: Ibd05406b4af7c99795f1bca2d4989790430b616b
Closes-Bug: #1991776
Signed-off-by: Goutham Pacha Ravi <gouthampravi@gmail.com>
(cherry picked from commit bdfafcdada)

manila/share/drivers/cephfs/driver.py

@@ -1033,7 +1033,7 @@ class NFSProtocolHelperMixin():
                             "a hostname (rather than IP address) was supplied "
                             "in 'cephfs_ganesha_server_ip' or "
                             "in 'cephfs_ganesha_export_ips'.")
-                return [4, 6]
+                self.configured_ip_versions = {4, 6}
         return list(self.configured_ip_versions)
 
 

manila/tests/share/drivers/cephfs/test_driver.py

@@ -1115,6 +1115,8 @@ class NFSProtocolHelperTestCase(test.TestCase):
 
         self.assertEqual(set(configured_ip_version),
                          set(helper.get_configured_ip_versions()))
+        self.assertEqual(set(configured_ip_version),
+                         helper.configured_ip_versions)
 
     def test_get_configured_ip_versions_already_set(self):
         fake_conf = configuration.Configuration(None)

releasenotes/notes/bug-1991776-cephfs-configured-ip-versions-fd87976fdb848e8c.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    `Bug 1991776 <https://launchpad.net/bugs/1991776>`_ was fixed within the
+    CephFS driver. The driver no longer emits repeated warnings concerning
+    supported IP versions when using the NFS protocol.