Deprecate Aggregate[CPU|Ram|Disk]Filters

Their functionality has been replace by placement API so these
filters should no longer used.

Change-Id: I0e7c42fcc907571cba84b1147e63767ccad9088e

releasenotes/notes/deprecate-CPU-Ram-Disk-filter-fa8ed0d10b0bd92a.yaml

@@ -0,0 +1,7 @@
+---
+deprecations:
+  - |
+    The ``CPUFilter``, ``RamFilter`` and
+    ``DiskFilter`` are now deprecated.
+    They will be removed in a future release and should no longer be used.
+    Their functionality has been replaced with a placement native approach.

zun/conf/scheduler.py

@@ -64,10 +64,7 @@ Related options:
     cfg.ListOpt("enabled_filters",
                 default=[
                     "AvailabilityZoneFilter",
-                    "CPUFilter",
-                    "RamFilter",
                     "ComputeFilter",
-                    "DiskFilter",
                     "RuntimeFilter",
                     ],
                 help="""

zun/scheduler/filters/cpu_filter.py

@@ -21,10 +21,19 @@ LOG = logging.getLogger(__name__)
 
 
 class CPUFilter(filters.BaseHostFilter):
-    """Filter the containers by cpu request"""
+    """DEPRECATED: Filter the containers by cpu request"""
 
     run_filter_once_per_request = True
 
+    def __init__(self):
+        super(CPUFilter, self).__init__()
+        LOG.warning('The CPUFilter is deprecated since the 7.0.0 '
+                    'Wallaby release. VCPU filtering is performed natively '
+                    'using the Placement service when using the '
+                    'filter_scheduler driver. Operators should define cpu '
+                    'allocation ratios either per host in the zun.conf '
+                    'or via the placement API.')
+
     def host_passes(self, host_state, container, extra_spec):
         if not container.cpu:
             return True

zun/scheduler/filters/disk_filter.py

@@ -21,10 +21,19 @@ LOG = logging.getLogger(__name__)
 
 
 class DiskFilter(filters.BaseHostFilter):
-    """Filter the containers by disk request"""
+    """DEPRECATED: Filter the containers by disk request"""
 
     run_filter_once_per_request = True
 
+    def __init__(self):
+        super(DiskFilter, self).__init__()
+        LOG.warning('The DiskFilter is deprecated since the 7.0.0 '
+                    'Wallaby release. DISK_GB filtering is performed natively '
+                    'using the Placement service when using the '
+                    'filter_scheduler driver. Operators should define disk '
+                    'allocation ratios either per host in the zun.conf '
+                    'or via the placement API.')
+
     def host_passes(self, host_state, container, extra_spec):
         if not hasattr(container, 'disk') or not container.disk:
             return True

zun/scheduler/filters/ram_filter.py

@@ -21,10 +21,19 @@ LOG = logging.getLogger(__name__)
 
 
 class RamFilter(filters.BaseHostFilter):
-    """Filter the containers by memory request"""
+    """DEPRECATED: Filter the containers by memory request"""
 
     run_filter_once_per_request = True
 
+    def __init__(self):
+        super(RamFilter, self).__init__()
+        LOG.warning('The RamFilter is deprecated since the 7.0.0 '
+                    'Wallaby release. MEMORY_MB filtering is performed '
+                    'natively using the Placement service when using the '
+                    'filter_scheduler driver. Operators should define ram '
+                    'allocation ratios either per host in the zun.conf '
+                    'or via the placement API.')
+
     def host_passes(self, host_state, container, extra_spec):
         if not container.memory:
             return True