virt: Highlight soon-to-be-unused driver APIs

These are all XenAPI-only APIs and can be removed in the near future
when that driver goes away. Highlight this fact now.

Change-Id: I04f6bd4000f58b9da2e4165aa2d623e795845d4e
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

nova/virt/driver.py

@@ -458,6 +458,8 @@ class ComputeDriver(object):
         """
         raise NotImplementedError()
 
+    # TODO(stephenfin): This was only implemented (properly) for XenAPI and
+    # should be removed.
     def get_console_pool_info(self, console_type):
         # TODO(Vek): Need to pass context in for access to auth_token
         raise NotImplementedError()
@@ -545,6 +547,8 @@ class ComputeDriver(object):
         """
         raise NotImplementedError()
 
+    # TODO(stephenfin): This was only implemented (properly) for XenAPI and
+    # should be removed.
     def get_all_bw_counters(self, instances):
         """Return bandwidth usage counters for each interface on each
            running VM.
@@ -725,6 +729,8 @@ class ComputeDriver(object):
         """
         raise NotImplementedError()
 
+    # TODO(stephenfin): This was only implemented (properly) for XenAPI and
+    # should be removed.
     def post_interrupted_snapshot_cleanup(self, context, instance):
         """Cleans up any resources left after an interrupted snapshot.
 
@@ -875,6 +881,8 @@ class ComputeDriver(object):
         """
         raise NotImplementedError()
 
+    # TODO(stephenfin): This was only implemented (properly) for XenAPI and
+    # should be removed.
     def set_bootable(self, instance, is_bootable):
         """Set the ability to power on/off an instance.
 
@@ -1345,6 +1353,8 @@ class ComputeDriver(object):
         """
         raise NotImplementedError()
 
+    # TODO(stephenfin): This was only implemented (properly) for XenAPI and
+    # should be removed.
     def reset_network(self, instance):
         """reset networking for specified instance."""
         # TODO(Vek): Need to pass context in for access to auth_token
@@ -1358,6 +1368,8 @@ class ComputeDriver(object):
         """
         raise NotImplementedError()
 
+    # TODO(stephenfin): This was only implemented (properly) for XenAPI and
+    # should be removed.
     def change_instance_metadata(self, context, instance, diff):
         """Applies a diff to the instance metadata.
 
@@ -1557,6 +1569,8 @@ class ComputeDriver(object):
         """
         raise NotImplementedError()
 
+    # TODO(stephenfin): This was only implemented (properly) for XenAPI and
+    # should be removed.
     def add_to_aggregate(self, context, aggregate, host, **kwargs):
         """Add a compute host to an aggregate.
 
@@ -1576,6 +1590,8 @@ class ComputeDriver(object):
         # NOTE(jogo) Currently only used for XenAPI-Pool
         raise NotImplementedError()
 
+    # TODO(stephenfin): This was only implemented (properly) for XenAPI and
+    # should be removed.
     def remove_from_aggregate(self, context, aggregate, host, **kwargs):
         """Remove a compute host from an aggregate.
 
@@ -1594,6 +1610,8 @@ class ComputeDriver(object):
         """
         raise NotImplementedError()
 
+    # TODO(stephenfin): This was only implemented (properly) for XenAPI and
+    # should be removed.
     def undo_aggregate_operation(self, context, op, aggregate,
                                   host, set_error=True):
         """Undo for Resource Pools."""
@@ -1632,6 +1650,8 @@ class ComputeDriver(object):
         # Refresh and check again.
         return nodename in self.get_available_nodes(refresh=True)
 
+    # TODO(stephenfin): This was only implemented (properly) for XenAPI and
+    # should be removed.
     def get_per_instance_usage(self):
         """Get information about instance resource usage.