HostMetrics: Hard auto-cleanup (#14255)

Fix host metric settings

Cleanup_host_metric command with default params

Fix order of host metric cleanups

awx/main/management/commands/cleanup_host_metrics.py

@@ -1,22 +1,22 @@
-from awx.main.models import HostMetric
 from django.core.management.base import BaseCommand
 from django.conf import settings
+from awx.main.tasks.host_metrics import HostMetricTask
 
 
 class Command(BaseCommand):
     """
-    Run soft-deleting of HostMetrics
+    This command provides cleanup task for HostMetric model.
+    There are two modes, which run in following order:
+    - soft cleanup
+    - - Perform soft-deletion of all host metrics last automated 12 months ago or before.
+        This is the same as issuing a DELETE request to /api/v2/host_metrics/N/ for all host metrics that match the criteria.
+    - - updates columns delete, deleted_counter and last_deleted
+    - hard cleanup
+    - - Permanently erase from the database all host metrics last automated 36 months ago or before.
+        This operation happens after the soft deletion has finished.
     """
 
-    help = 'Run soft-deleting of HostMetrics'
-
-    def add_arguments(self, parser):
-        parser.add_argument('--months-ago', type=int, dest='months-ago', action='store', help='Threshold in months for soft-deleting')
+    help = 'Run soft and hard-deletion of HostMetrics'
 
     def handle(self, *args, **options):
-        months_ago = options.get('months-ago') or None
-
-        if not months_ago:
-            months_ago = getattr(settings, 'CLEANUP_HOST_METRICS_SOFT_THRESHOLD', 12)
-
-        HostMetric.cleanup_task(months_ago)
+        HostMetricTask().cleanup(soft_threshold=settings.CLEANUP_HOST_METRICS_SOFT_THRESHOLD, hard_threshold=settings.CLEANUP_HOST_METRICS_HARD_THRESHOLD)