Add workflow to update Nautobot based on openstack CRUD events

This does part of what the ml2 driver was doing to update networks and
subnets in Nautobot.

Author: stevekeay

python/understack-workflows/tests/json_samples/README.collecting-from-rabbit.md

@@ -0,0 +1,11 @@
+The openstack event payloads published via Rabbitmq can be snooped on with commands like:
+
+```sh
+kubectl -n openstack exec -it rabbitmq-server-0 -c rabbitmq -- \
+  rabbitmqadmin --vhost=neutron get \
+    queue=notifications.info \
+    ackmode=ack_requeue_true \
+    count=1000 \
+| awk -F\| '{print $5}' \
+| fgrep network.create.end
+```

python/understack-workflows/tests/json_samples/oslo-event-network.create.end.json

@@ -0,0 +1 @@
+{"oslo.version": "2.0", "oslo.message": "{\"message_id\": \"8994f9f2-851b-4279-ba38-1e55d0307926\", \"publisher_id\": \"network.neutron-server-7d76968979-6np4r\", \"event_type\": \"network.create.end\", \"priority\": \"INFO\", \"payload\": {\"network\": {\"id\": \"5dddb3dc-b6d6-4247-a02e-8089c4374290\", \"name\": \"marek-storage-test-network\", \"tenant_id\": \"962f6e0dfb314d43bdee2a9d5c7bd7f6\", \"admin_state_up\": true, \"mtu\": 9000, \"status\": \"ACTIVE\", \"subnets\": [], \"shared\": false, \"project_id\": \"46c1e917980e4485915b1444e8c50cc2\", \"port_security_enabled\": true, \"router:external\": false, \"provider:network_type\": \"vxlan\", \"provider:physical_network\": null, \"provider:segmentation_id\": 1862, \"is_default\": false, \"availability_zone_hints\": [], \"availability_zones\": [], \"ipv4_address_scope\": null, \"ipv6_address_scope\": null, \"description\": \"\", \"l2_adjacency\": true, \"tags\": [], \"created_at\": \"2025-09-11T16:25:54Z\", \"updated_at\": \"2025-09-11T16:25:55Z\", \"revision_number\": 1}}, \"timestamp\": \"2025-09-11 16:26:01.168699\", \"_unique_id\": \"23fdf96e8a7d4452ab57b05042244d9b\", \"_context_user\": \"5f9179b7e200cd85c55e8a26400e266c6b4f7209f6d3fb2adc3cf8e1113c378c\", \"_context_project_id\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_system_scope\": null, \"_context_project\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_domain\": null, \"_context_user_domain\": \"1f75c3b20fcb41ec924a71be83a5ee94\", \"_context_project_domain\": \"7f46f53fcb3c4625a343eaa35b5e0d04\", \"_context_is_admin\": true, \"_context_read_only\": false, \"_context_show_deleted\": false, \"_context_auth_token\": null, \"_context_request_id\": \"req-3297674b-4d51-44ad-b787-e2667f43ff53\", \"_context_global_request_id\": null, \"_context_resource_uuid\": null, \"_context_roles\": [\"manager\", \"reader\", \"member\", \"admin\"], \"_context_user_identity\": \"5f9179b7e200cd85c55e8a26400e266c6b4f7209f6d3fb2adc3cf8e1113c378c 32e02632f4f04415bab5895d1e7247b7 - 1f75c3b20fcb41ec924a71be83a5ee94 7f46f53fcb3c4625a343eaa35b5e0d04\", \"_context_is_admin_project\": true, \"_context_user_id\": \"5f9179b7e200cd85c55e8a26400e266c6b4f7209f6d3fb2adc3cf8e1113c378c\", \"_context_tenant_id\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_timestamp\": \"2025-09-11 16:26:01.168178\", \"_context_tenant_name\": \"baremetal\", \"_context_project_name\": \"baremetal\", \"_context_user_name\": \"[email protected]\"}"}

python/understack-workflows/tests/json_samples/oslo-event-network.delete.end.json

@@ -0,0 +1 @@
+{"oslo.version": "2.0", "oslo.message": "{\"message_id\": \"f1d4303d-3870-4513-8696-f1732b22e227\", \"publisher_id\": \"network.neutron-server-7d76968979-9f6wd\", \"event_type\": \"network.delete.end\", \"priority\": \"INFO\", \"payload\": {\"network\": {\"id\": \"5dddb3dc-b6d6-4247-a02e-8089c4374290\", \"name\": \"marek-storage-test-network\", \"tenant_id\": \"46c1e917980e4485915b1444e8c50cc2\", \"admin_state_up\": true, \"mtu\": 9000, \"status\": \"ACTIVE\", \"subnets\": [], \"standard_attr_id\": 13740, \"shared\": false, \"availability_zone_hints\": [], \"availability_zones\": [], \"ipv4_address_scope\": null, \"ipv6_address_scope\": null, \"router:external\": false, \"vlan_transparent\": null, \"description\": \"\", \"port_security_enabled\": true, \"l2_adjacency\": true, \"tags\": [], \"created_at\": \"2025-09-11T16:25:54Z\", \"updated_at\": \"2025-09-11T16:31:21Z\", \"revision_number\": 3, \"project_id\": \"4cde1e465a5d41e482755f7d1ce12b28\", \"provider:network_type\": \"vxlan\", \"provider:physical_network\": null, \"provider:segmentation_id\": 1862}, \"network_id\": \"5dddb3dc-b6d6-4247-a02e-8089c4374290\"}, \"timestamp\": \"2025-09-11 16:31:58.734463\", \"_unique_id\": \"5e4090d2069440209794e0c6d29dee5b\", \"_context_user\": \"5f9179b7e200cd85c55e8a26400e266c6b4f7209f6d3fb2adc3cf8e1113c378c\", \"_context_project_id\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_system_scope\": null, \"_context_project\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_domain\": null, \"_context_user_domain\": \"1f75c3b20fcb41ec924a71be83a5ee94\", \"_context_project_domain\": \"7f46f53fcb3c4625a343eaa35b5e0d04\", \"_context_is_admin\": true, \"_context_read_only\": false, \"_context_show_deleted\": false, \"_context_auth_token\": null, \"_context_request_id\": \"req-7164140a-3ff6-4eeb-b4b0-191e4312344c\", \"_context_global_request_id\": null, \"_context_resource_uuid\": null, \"_context_roles\": [\"manager\", \"reader\", \"member\", \"admin\"], \"_context_user_identity\": \"5f9179b7e200cd85c55e8a26400e266c6b4f7209f6d3fb2adc3cf8e1113c378c 32e02632f4f04415bab5895d1e7247b7 - 1f75c3b20fcb41ec924a71be83a5ee94 7f46f53fcb3c4625a343eaa35b5e0d04\", \"_context_is_admin_project\": true, \"_context_user_id\": \"5f9179b7e200cd85c55e8a26400e266c6b4f7209f6d3fb2adc3cf8e1113c378c\", \"_context_tenant_id\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_timestamp\": \"2025-09-11 16:31:58.733890\", \"_context_tenant_name\": \"baremetal\", \"_context_project_name\": \"baremetal\", \"_context_user_name\": \"[email protected]\"}"}

python/understack-workflows/tests/json_samples/oslo-event-network.update.end.json

@@ -0,0 +1 @@
+{"oslo.version": "2.0", "oslo.message": "{\"message_id\": \"65fc1389-1981-4a8d-9799-0fd41f051023\", \"publisher_id\": \"network.neutron-server-5bb5c5b5d9-cl6lv\", \"event_type\": \"network.update.end\", \"priority\": \"INFO\", \"payload\": {\"network\": {\"id\": \"f4aa4b99-2c2f-4698-a2f0-ac9920b1ee81\", \"name\": \"service-net\", \"tenant_id\": \"a4a74dbf982a471e8150db2babcac8c2\", \"admin_state_up\": true, \"mtu\": 9000, \"status\": \"ACTIVE\", \"subnets\": [\"1600eeef-6b3c-47fe-981a-e9ae83e23ce7\"], \"shared\": false, \"availability_zone_hints\": [], \"availability_zones\": [], \"ipv4_address_scope\": \"73bb6292-e015-4607-aac9-9a7095efa1a9\", \"ipv6_address_scope\": null, \"router:external\": false, \"description\": \"test-servicenet-network\", \"port_security_enabled\": true, \"l2_adjacency\": true, \"tags\": [], \"created_at\": \"2025-08-20T13:15:46Z\", \"updated_at\": \"2025-09-16T16:15:04Z\", \"revision_number\": 5, \"project_id\": \"a4a74dbf982a471e8150db2babcac8c2\", \"provider:network_type\": \"vxlan\", \"provider:physical_network\": null, \"provider:segmentation_id\": 1860}}, \"timestamp\": \"2025-09-16 16:15:05.161384\", \"_unique_id\": \"d5da8774d7d8447cb0d6476729f21c70\", \"_context_user\": \"e63aa434bf761337c4588ed49af49f6a7a2a86501a66a11d7da13ec0ead25ed4\", \"_context_project_id\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_system_scope\": null, \"_context_project\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_domain\": null, \"_context_user_domain\": \"1f75c3b20fcb41ec924a71be83a5ee94\", \"_context_project_domain\": \"7f46f53fcb3c4625a343eaa35b5e0d04\", \"_context_is_admin\": true, \"_context_read_only\": false, \"_context_show_deleted\": false, \"_context_auth_token\": null, \"_context_request_id\": \"req-23005bcf-c8e2-4b30-8b89-b911358b734e\", \"_context_global_request_id\": null, \"_context_resource_uuid\": null, \"_context_roles\": [\"manager\", \"reader\", \"member\", \"admin\"], \"_context_user_identity\": \"e63aa434bf761337c4588ed49af49f6a7a2a86501a66a11d7da13ec0ead25ed4 32e02632f4f04415bab5895d1e7247b7 - 1f75c3b20fcb41ec924a71be83a5ee94 7f46f53fcb3c4625a343eaa35b5e0d04\", \"_context_is_admin_project\": true, \"_context_user_id\": \"e63aa434bf761337c4588ed49af49f6a7a2a86501a66a11d7da13ec0ead25ed4\", \"_context_tenant_id\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_timestamp\": \"2025-09-16 16:15:05.160974\", \"_context_tenant_name\": \"baremetal\", \"_context_project_name\": \"baremetal\", \"_context_user_name\": \"[email protected]\"}"}

python/understack-workflows/tests/json_samples/oslo-event-subnet.create.end.json

@@ -0,0 +1 @@
+{"oslo.version": "2.0", "oslo.message": "{\"message_id\": \"60b24028-342c-4337-93f3-d0853ee753a4\", \"publisher_id\": \"network.neutron-server-7bb5fc5987-w8srl\", \"event_type\": \"subnet.create.end\", \"priority\": \"INFO\", \"payload\": {\"subnet\": {\"id\": \"eb9edeef-cc57-45ca-9caf-42be046822ff\", \"name\": \"c_rally_49fb715e_XGTdOFQF\", \"tenant_id\": \"3a69b98463964e19b295f87cffa5db52\", \"network_id\": \"b69b1a1d-5620-48fa-8fc2-fb0d1e90cf1c\", \"ip_version\": 4, \"subnetpool_id\": null, \"enable_dhcp\": true, \"ipv6_ra_mode\": null, \"ipv6_address_mode\": null, \"gateway_ip\": \"192.168.91.1\", \"cidr\": \"192.168.91.0/24\", \"allocation_pools\": [{\"start\": \"192.168.91.2\", \"end\": \"192.168.91.254\"}], \"host_routes\": [], \"dns_nameservers\": [\"8.8.8.8\"], \"description\": \"\", \"router:external\": false, \"service_types\": [], \"tags\": [], \"created_at\": \"2025-09-15T00:19:56Z\", \"updated_at\": \"2025-09-15T00:19:56Z\", \"revision_number\": 0, \"project_id\": \"3a69b98463964e19b295f87cffa5db52\"}}, \"timestamp\": \"2025-09-15 00:19:56.545912\", \"_unique_id\": \"46a2d701444f4f07aadc3c6c77dd4d08\", \"_context_user\": \"592e424b165948288c86687057c88fe8\", \"_context_project_id\": \"3a69b98463964e19b295f87cffa5db52\", \"_context_system_scope\": null, \"_context_project\": \"3a69b98463964e19b295f87cffa5db52\", \"_context_domain\": null, \"_context_user_domain\": \"default\", \"_context_project_domain\": \"default\", \"_context_is_admin\": false, \"_context_read_only\": false, \"_context_show_deleted\": false, \"_context_auth_token\": null, \"_context_request_id\": \"req-b1617d34-e375-45fd-ae90-5c14c8bef0d0\", \"_context_global_request_id\": null, \"_context_resource_uuid\": null, \"_context_roles\": [\"member\", \"reader\"], \"_context_user_identity\": \"592e424b165948288c86687057c88fe8 3a69b98463964e19b295f87cffa5db52 - default default\", \"_context_is_admin_project\": true, \"_context_user_id\": \"592e424b165948288c86687057c88fe8\", \"_context_tenant_id\": \"3a69b98463964e19b295f87cffa5db52\", \"_context_timestamp\": \"2025-09-15 00:19:56.544749\", \"_context_tenant_name\": \"c_rally_49fb715e_K771F0gL\", \"_context_project_name\": \"c_rally_49fb715e_K771F0gL\", \"_context_user_name\": \"c_rally_49fb715e_DAKXu9bI\"}"}

python/understack-workflows/tests/json_samples/oslo-event-subnet.delete.end.json

@@ -0,0 +1 @@
+{"oslo.version": "2.0", "oslo.message": "{\"message_id\": \"7dac063f-e339-42e2-aa02-a02796aa9ee0\", \"publisher_id\": \"network.neutron-server-7bb5fc5987-w8srl\", \"event_type\": \"subnet.delete.end\", \"priority\": \"INFO\", \"payload\": {\"subnet\": {\"id\": \"eb9edeef-cc57-45ca-9caf-42be046822ff\", \"name\": \"c_rally_49fb715e_XGTdOFQF\", \"tenant_id\": \"3a69b98463964e19b295f87cffa5db52\", \"network_id\": \"b69b1a1d-5620-48fa-8fc2-fb0d1e90cf1c\", \"ip_version\": 4, \"subnetpool_id\": null, \"enable_dhcp\": true, \"ipv6_ra_mode\": null, \"ipv6_address_mode\": null, \"standard_attr_id\": 14245, \"gateway_ip\": \"192.168.91.1\", \"cidr\": \"192.168.91.0/24\", \"allocation_pools\": [{\"start\": \"192.168.91.2\", \"end\": \"192.168.91.254\"}], \"host_routes\": [], \"dns_nameservers\": [\"8.8.8.8\"], \"shared\": false, \"description\": \"\", \"router:external\": false, \"service_types\": [], \"segment_id\": null, \"tags\": [], \"created_at\": \"2025-09-15T00:19:56Z\", \"updated_at\": \"2025-09-15T00:19:56Z\", \"revision_number\": 0, \"project_id\": \"3a69b98463964e19b295f87cffa5db52\"}, \"subnet_id\": \"eb9edeef-cc57-45ca-9caf-42be046822ff\"}, \"timestamp\": \"2025-09-15 00:28:41.377712\", \"_unique_id\": \"df61372c5814497d99892c9b5d485475\", \"_context_user\": \"592e424b165948288c86687057c88fe8\", \"_context_project_id\": \"3a69b98463964e19b295f87cffa5db52\", \"_context_system_scope\": null, \"_context_project\": \"3a69b98463964e19b295f87cffa5db52\", \"_context_domain\": null, \"_context_user_domain\": \"default\", \"_context_project_domain\": \"default\", \"_context_is_admin\": false, \"_context_read_only\": false, \"_context_show_deleted\": false, \"_context_auth_token\": null, \"_context_request_id\": \"req-9bb860ee-02be-4b0f-a45a-6c1042440555\", \"_context_global_request_id\": null, \"_context_resource_uuid\": null, \"_context_roles\": [\"member\", \"reader\"], \"_context_user_identity\": \"592e424b165948288c86687057c88fe8 3a69b98463964e19b295f87cffa5db52 - default default\", \"_context_is_admin_project\": true, \"_context_user_id\": \"592e424b165948288c86687057c88fe8\", \"_context_tenant_id\": \"3a69b98463964e19b295f87cffa5db52\", \"_context_timestamp\": \"2025-09-15 00:28:41.376637\", \"_context_tenant_name\": \"c_rally_49fb715e_K771F0gL\", \"_context_project_name\": \"c_rally_49fb715e_K771F0gL\", \"_context_user_name\": \"c_rally_49fb715e_DAKXu9bI\"}"}

python/understack-workflows/tests/json_samples/oslo-event-subnet.update.end.json

@@ -0,0 +1 @@
+{"oslo.version": "2.0", "oslo.message": "{\"message_id\": \"3c72f869-d29b-4eaf-91d5-2d0606477367\", \"publisher_id\": \"network.neutron-server-5bb5c5b5d9-c82x2\", \"event_type\": \"subnet.update.end\", \"priority\": \"INFO\", \"payload\": {\"subnet\": {\"id\": \"1600eeef-6b3c-47fe-981a-e9ae83e23ce7\", \"name\": \"my-servicenet\", \"tenant_id\": \"a4a74dbf982a471e8150db2babcac8c2\", \"network_id\": \"f4aa4b99-2c2f-4698-a2f0-ac9920b1ee81\", \"ip_version\": 4, \"subnetpool_id\": \"eed7e843-645f-43b6-85e4-6272dd395a9d\", \"enable_dhcp\": false, \"ipv6_ra_mode\": null, \"ipv6_address_mode\": null, \"gateway_ip\": \"10.148.4.33\", \"cidr\": \"10.148.4.32/27\", \"allocation_pools\": [{\"start\": \"10.148.4.34\", \"end\": \"10.148.4.62\"}], \"host_routes\": [], \"dns_nameservers\": [], \"description\": \"\", \"router:external\": false, \"service_types\": [], \"segment_id\": null, \"tags\": [], \"created_at\": \"2025-08-20T13:16:18Z\", \"updated_at\": \"2025-09-16T16:12:01Z\", \"revision_number\": 2, \"project_id\": \"a4a74dbf982a471e8150db2babcac8c2\"}}, \"timestamp\": \"2025-09-16 16:12:01.737116\", \"_unique_id\": \"844c0977a501475cbb9dea8207ccaf02\", \"_context_user\": \"e63aa434bf761337c4588ed49af49f6a7a2a86501a66a11d7da13ec0ead25ed4\", \"_context_project_id\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_system_scope\": null, \"_context_project\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_domain\": null, \"_context_user_domain\": \"1f75c3b20fcb41ec924a71be83a5ee94\", \"_context_project_domain\": \"7f46f53fcb3c4625a343eaa35b5e0d04\", \"_context_is_admin\": true, \"_context_read_only\": false, \"_context_show_deleted\": false, \"_context_auth_token\": null, \"_context_request_id\": \"req-4483343f-a44e-4716-b835-cd605c4e0898\", \"_context_global_request_id\": null, \"_context_resource_uuid\": null, \"_context_roles\": [\"manager\", \"reader\", \"member\", \"admin\"], \"_context_user_identity\": \"e63aa434bf761337c4588ed49af49f6a7a2a86501a66a11d7da13ec0ead25ed4 32e02632f4f04415bab5895d1e7247b7 - 1f75c3b20fcb41ec924a71be83a5ee94 7f46f53fcb3c4625a343eaa35b5e0d04\", \"_context_is_admin_project\": true, \"_context_user_id\": \"e63aa434bf761337c4588ed49af49f6a7a2a86501a66a11d7da13ec0ead25ed4\", \"_context_tenant_id\": \"32e02632f4f04415bab5895d1e7247b7\", \"_context_timestamp\": \"2025-09-16 16:12:01.736781\", \"_context_tenant_name\": \"baremetal\", \"_context_project_name\": \"baremetal\", \"_context_user_name\": \"[email protected]\"}"}

python/understack-workflows/tests/test_oslo_event_neutron_network.py

@@ -0,0 +1,143 @@
+import json
+from unittest.mock import Mock
+
+import pynautobot
+import pytest
+
+from understack_workflows.oslo_event import neutron_network
+
+
+def _sample_fixture_data(name: str) -> dict:
+    """Load example event data from JSON fixture file."""
+    with open(f"tests/json_samples/{name}.json") as f:
+        data = json.loads(f.read())
+    return json.loads(data["oslo.message"])
+
+
+@pytest.fixture
+def network_create_event_data():
+    return _sample_fixture_data("oslo-event-network.create.end")
+
+
+@pytest.fixture
+def network_update_event_data():
+    return _sample_fixture_data("oslo-event-network.update.end")
+
+
+@pytest.fixture
+def network_delete_event_data():
+    return _sample_fixture_data("oslo-event-network.delete.end")
+
+
+def test_handle_network_create(network_create_event_data):
+    mock_nautobot = Mock()
+    mock_nautobot.ipam.namespaces.create.return_value = "123"
+
+    result = neutron_network.handle_network_create_or_update(
+        None, mock_nautobot, network_create_event_data, ucvni_group_name="FOO"
+    )
+
+    mock_nautobot.ipam.namespaces.create.assert_called_once_with(
+        name="5dddb3dc-b6d6-4247-a02e-8089c4374290"
+    )
+    mock_nautobot.plugins.undercloud_vni.ucvnis.create.assert_called_once_with(
+        {
+            "id": "5dddb3dc-b6d6-4247-a02e-8089c4374290",
+            "name": "marek-storage-test-network",
+            "status": {
+                "name": "Active",
+            },
+            "tenant": "46c1e917-980e-4485-915b-1444e8c50cc2",
+            "ucvni_group": {
+                "name": "FOO",
+            },
+        },
+    )
+    assert result == 0
+
+
+def test_handle_network_update(network_update_event_data):
+    mock_nautobot = Mock()
+    mock_nautobot.ipam.namespaces.update.return_value = "123"
+
+    result = neutron_network.handle_network_create_or_update(
+        None, mock_nautobot, network_update_event_data, ucvni_group_name="FOO"
+    )
+
+    mock_nautobot.ipam.namespaces.create.assert_called_once_with(
+        name="f4aa4b99-2c2f-4698-a2f0-ac9920b1ee81"
+    )
+    mock_nautobot.plugins.undercloud_vni.ucvnis.create.assert_called_once_with(
+        {
+            "id": "f4aa4b99-2c2f-4698-a2f0-ac9920b1ee81",
+            "name": "service-net",
+            "status": {
+                "name": "Active",
+            },
+            "tenant": "a4a74dbf-982a-471e-8150-db2babcac8c2",
+            "ucvni_group": {
+                "name": "FOO",
+            },
+        },
+    )
+    assert result == 0
+
+
+def test_handle_network_create_idempotent_namespace(network_create_event_data):
+    mock_pynautobot_req = Mock()
+    mock_pynautobot_req.status_code = 400
+    mock_pynautobot_req.text = "namespace with this name already exists"
+
+    mock_nautobot = Mock()
+    mock_nautobot.ipam.namespaces.create.side_effect = pynautobot.RequestError(
+        mock_pynautobot_req
+    )
+
+    result = neutron_network.handle_network_create_or_update(
+        None, mock_nautobot, network_create_event_data, ucvni_group_name="FOO"
+    )
+    assert result == 0
+
+
+def test_handle_network_create_idempotent_ucvni(network_create_event_data):
+    mock_nautobot = Mock()
+    mock_nautobot.ipam.namespaces.create.return_value = "123"
+
+    mock_pynautobot_req = Mock()
+    mock_pynautobot_req.status_code = 400
+    mock_pynautobot_req.text = "this Id already exists"
+
+    mock_nautobot.plugins.undercloud_vni.ucvnis.create.side_effect = (
+        pynautobot.RequestError(mock_pynautobot_req)
+    )
+
+    result = neutron_network.handle_network_create_or_update(
+        None, mock_nautobot, network_create_event_data, ucvni_group_name="FOO"
+    )
+    assert result == 0
+
+
+def test_handle_network_delete(network_delete_event_data):
+    mock_nautobot_namespace = Mock()
+    mock_nautobot_namespace.delete.return_value = "123"
+
+    mock_nautobot_prefix = Mock()
+    mock_nautobot_prefix.delete.return_value = "123"
+
+    mock_nautobot = Mock()
+    mock_nautobot.ipam.namespaces.get.return_value = mock_nautobot_namespace
+    mock_nautobot.ipam.prefixes.filter.return_value = [mock_nautobot_prefix]
+
+    result = neutron_network.handle_network_delete(
+        None, mock_nautobot, network_delete_event_data
+    )
+
+    mock_nautobot.ipam.namespaces.get.assert_called_once_with(
+        name="5dddb3dc-b6d6-4247-a02e-8089c4374290"
+    )
+    mock_nautobot_namespace.delete.assert_called_once()
+    mock_nautobot.plugins.undercloud_vni.ucvnis.delete.assert_called_once_with(
+        ["5dddb3dc-b6d6-4247-a02e-8089c4374290"]
+    )
+    mock_nautobot_prefix.delete.assert_called_once()
+    assert result == 0