delete inventories in the background via a celery task

see: #4382
see: #6279

awx/main/migrations/0038_v320_release.py

@@ -70,6 +70,13 @@ class Migration(migrations.Migration):
             unique_together=set([('host', 'inventory')]),
         ),
 
+        # Background Inventory deletion
+        migrations.AddField(
+            model_name='inventory',
+            name='pending_deletion',
+            field=models.BooleanField(default=False, help_text='Flag indicating the inventory is being deleted.', editable=False),
+        ),
+
         # Facts
         migrations.AlterField(
             model_name='fact',

awx/main/models/inventory.py

@@ -11,7 +11,7 @@ import os.path
 
 # Django
 from django.conf import settings
-from django.db import models
+from django.db import models, connection
 from django.utils.translation import ugettext_lazy as _
 from django.db import transaction
 from django.core.exceptions import ValidationError
@@ -20,6 +20,7 @@ from django.utils.timezone import now
 # AWX
 from awx.api.versioning import reverse
 from awx.main.constants import CLOUD_PROVIDERS
+from awx.main.consumers import emit_channel_notification
 from awx.main.fields import (
     ImplicitRoleField,
     JSONBField,
@@ -153,6 +154,11 @@ class Inventory(CommonModelNameNotUnique, ResourceMixin):
         null=True,
         default=None,
     )
+    pending_deletion = models.BooleanField(
+        default=False,
+        editable=False,
+        help_text=_('Flag indicating the inventory is being deleted.'),
+    )
 
 
     def get_absolute_url(self, request=None):
@@ -351,6 +357,12 @@ class Inventory(CommonModelNameNotUnique, ResourceMixin):
             iobj.save(update_fields=computed_fields.keys())
         logger.debug("Finished updating inventory computed fields")
 
+    def websocket_emit_status(self, status):
+        connection.on_commit(lambda: emit_channel_notification(
+            'inventories-status_changed',
+            {'group_name': 'inventories', 'inventory_id': self.id, 'status': status}
+        ))
+
     @property
     def root_groups(self):
         group_pks = self.groups.values_list('pk', flat=True)

awx/main/tasks.py

@@ -52,7 +52,7 @@ from awx.main.isolated import run, isolated_manager
 from awx.main.utils import (get_ansible_version, get_ssh_version, decrypt_field, update_scm_url,
                             check_proot_installed, build_proot_temp_dir,
                             wrap_args_with_proot, get_system_task_capacity, OutputEventFilter,
-                            parse_yaml_or_json)
+                            parse_yaml_or_json, ignore_inventory_computed_fields, ignore_inventory_group_removal)
 from awx.main.utils.reload import restart_local_services, stop_local_services
 from awx.main.utils.handlers import configure_external_logger
 from awx.main.consumers import emit_channel_notification
@@ -356,6 +356,23 @@ def update_host_smart_inventory_memberships():
         return
 
 
+@task(queue='tower')
+def delete_inventory(inventory_id):
+    i = Inventory.objects.filter(id=inventory_id)
+    if not i.exists():
+        logger.error("Delete Inventory failed due to missing inventory: " + str(inventory_id))
+        return
+    i = i[0]
+    with ignore_inventory_computed_fields(), \
+            ignore_inventory_group_removal():
+        i.delete()
+    emit_channel_notification(
+        'inventories-status_changed',
+        {'group_name': 'inventories', 'inventory_id': inventory_id, 'status': 'deleted'}
+    )
+    logger.debug('Deleted inventory: %s' % inventory_id)
+
+
 class BaseTask(Task):
     name = None
     model = None