NetApp: Deprecate E-Series drivers

The deprecation for the E-Series iSCSI/FCP drivers
begins this release (Rocky) and the drivers will be removed
in Stein. We will run E-Series CI until
stable/rocky is tagged EOL; no new features will be added,
however, existing code may be meaningfully refactored to
keep the drivers ready for removal.

Change-Id: Iea8ca99fa55743e910af47d19af150cb9fd9ecf2

cinder/volume/drivers/netapp/eseries/library.py

@@ -152,6 +152,12 @@ class NetAppESeriesLibrary(object):
         if self.configuration.netapp_enable_multiattach:
             self._ensure_multi_attach_host_group_exists()
 
+        # This driver has been marked 'deprecated' in the Rocky release and
+        # will be removed in Stein.
+        msg = _("The NetApp E-Series driver is deprecated and will be "
+                "removed in a future release.")
+        versionutils.report_deprecated_feature(LOG, msg)
+
     def _create_rest_client(self, configuration):
         port = configuration.netapp_server_port
         scheme = configuration.netapp_transport_type.lower()

releasenotes/notes/netapp-deprecate-eseries-drivers-bc4f552d277c07b9.yaml

@@ -0,0 +1,6 @@
+---
+deprecations:
+  - The NetApp E-Series drivers are deprecated as of the Rocky release and
+    will be removed in the Stein release. Other configurations of the
+    NetApp driver, i.e Clustered Data ONTAP and Solidfire, are
+    unaffected.