Deprecate bare metal filters

This change deprecates the Exact filters, and two options commonly used
to enable them. Custom resource classes should be used instead.

Change-Id: I843353427c90142a366ae9ca63ee4298b4f3ecd4

nova/conf/scheduler.py

@@ -291,6 +291,13 @@ Related options:
         ],
         deprecated_name="baremetal_scheduler_default_filters",
         deprecated_group="DEFAULT",
+        deprecated_for_removal=True,
+        deprecated_reason="""
+These filters were used to overcome some of the baremetal scheduling
+limitations in Nova prior to the use of the Placement API. Now scheduling will
+use the custom resource class defined for each baremetal node to make its
+selection.
+""",
         help="""
 Filters used for filtering baremetal hosts.
 
@@ -313,6 +320,13 @@ Related options:
     cfg.BoolOpt("use_baremetal_filters",
         deprecated_name="scheduler_use_baremetal_filters",
         deprecated_group="DEFAULT",
+        deprecated_for_removal=True,
+        deprecated_reason="""
+These filters were used to overcome some of the baremetal scheduling
+limitations in Nova prior to the use of the Placement API. Now scheduling will
+use the custom resource class defined for each baremetal node to make its
+selection.
+""",
         default=False,
         help="""
 Enable baremetal filters.

nova/scheduler/filters/exact_core_filter.py

@@ -25,6 +25,11 @@ LOG = logging.getLogger(__name__)
 class ExactCoreFilter(filters.BaseHostFilter):
     """Exact Core Filter."""
 
+    def __init__(self, *args, **kwargs):
+        super(ExactCoreFilter, self).__init__(*args, **kwargs)
+        LOG.warning('ExactCoreFilter is deprecated in Pike and will be '
+                    'removed in a subsequent release.')
+
     def host_passes(self, host_state, spec_obj):
         """Return True if host has the exact number of CPU cores."""
         if not host_state.vcpus_total:

nova/scheduler/filters/exact_disk_filter.py

@@ -23,6 +23,11 @@ LOG = logging.getLogger(__name__)
 class ExactDiskFilter(filters.BaseHostFilter):
     """Exact Disk Filter."""
 
+    def __init__(self, *args, **kwargs):
+        super(ExactDiskFilter, self).__init__(*args, **kwargs)
+        LOG.warning('ExactDiskFilter is deprecated in Pike and will be '
+                    'removed in a subsequent release.')
+
     def host_passes(self, host_state, spec_obj):
         """Return True if host has the exact amount of disk available."""
         requested_disk = (1024 * (spec_obj.root_gb +

nova/scheduler/filters/exact_ram_filter.py

@@ -23,6 +23,11 @@ LOG = logging.getLogger(__name__)
 class ExactRamFilter(filters.BaseHostFilter):
     """Exact RAM Filter."""
 
+    def __init__(self, *args, **kwargs):
+        super(ExactRamFilter, self).__init__(*args, **kwargs)
+        LOG.warning('ExactRamFilter is deprecated in Pike and will be '
+                    'removed in a subsequent release.')
+
     def host_passes(self, host_state, spec_obj):
         """Return True if host has the exact amount of RAM available."""
         requested_ram = spec_obj.memory_mb

releasenotes/notes/deprecate-baremetal-filters-618249af65115bf6.yaml

@@ -0,0 +1,14 @@
+---
+deprecations:
+  - |
+    The configuration options ``baremetal_enabled_filters`` and
+    ``use_baremetal_filters`` are deprecated in Pike and should only be used if
+    your deployment still contains nodes that have not had their resource_class
+    attribute set. See `Ironic release notes <https://docs.openstack.org/releasenotes/ironic/>`_
+    for upgrade concerns.
+  - |
+    The following scheduler filters are deprecated in Pike: ``ExactRamFilter``,
+    ``ExactCoreFilter`` and ``ExactDiskFilter`` and should only be used if your
+    deployment still contains nodes that have not had their resource_class
+    attribute set. See `Ironic release notes <https://docs.openstack.org/releasenotes/ironic/>`_
+    for upgrade concerns.