remove baremetal nodes when building CDM

aggregate list and availability_zone list may return ironic type
compute nodes. When building compute data model we should check
the hypervisor_type and remove ironic compute nodes.

Change-Id: Idf404c104c30368baf95ef7d05ad8fc3e7adca38
Related-Bug: #1835183

watcher/decision_engine/model/collector/nova.py

@@ -263,6 +263,10 @@ class ModelBuilder(object):
                                                               detailed=True)
             if cnode:
                 node_info = cnode[0]
+                # filter out baremetal node
+                if node_info.hypervisor_type == 'ironic':
+                    LOG.debug("filtering out baremetal node: %s", node_name)
+                    continue
                 self.add_compute_node(node_info)
                 # node.servers is a list of server objects
                 # New in nova version 2.53

watcher/tests/decision_engine/cluster/test_model_builder.py

@@ -173,3 +173,61 @@ class TestModelBuilder(base.BaseTestCase):
             'hosttwo', servers=True, detailed=True)
         self.assertEqual(
             m_nova.return_value.get_compute_node_by_name.call_count, 2)
+
+    @mock.patch.object(nova_helper, 'NovaHelper')
+    def test_add_physical_layer_with_baremetal_node(self, m_nova):
+        """"""
+
+        m_nova.return_value.get_aggregate_list.return_value = \
+            [mock.Mock(id=1, name='example'),
+             mock.Mock(id=5, name='example', hosts=['hostone', 'hosttwo'])]
+
+        m_nova.return_value.get_service_list.return_value = \
+            [mock.Mock(zone='av_b', host='hostthree'),
+             mock.Mock(zone='av_a', host='hostone')]
+
+        compute_node = mock.Mock(
+            id='796fee99-65dd-4262-aa-fd2a1143faa6',
+            hypervisor_hostname='hostone',
+            hypervisor_type='QEMU',
+            state='TEST_STATE',
+            status='TEST_STATUS',
+            memory_mb=333,
+            free_disk_gb=222,
+            local_gb=111,
+            vcpus=4,
+            servers=[
+                {'name': 'fake_instance',
+                 'uuid': 'ef500f7e-dac8-470f-960c-169486fce71b'}
+            ],
+            service={'id': 123, 'host': 'hostone',
+                     'disabled_reason': ''},
+        )
+
+        baremetal_node = mock.Mock(
+            id='5f2d1b3d-4099-4623-b9-05148aefd6cb',
+            hypervisor_hostname='hosttwo',
+            hypervisor_type='ironic',
+            state='TEST_STATE',
+            status='TEST_STATUS',
+        )
+
+        m_nova.return_value.get_compute_node_by_name.side_effect = [
+            [compute_node], [baremetal_node]]
+
+        m_scope = [{"compute": [
+            {"host_aggregates": [{"id": 5}]},
+            {"availability_zones": [{"name": "av_a"}]}
+        ]}]
+
+        t_nova_cluster = nova.ModelBuilder(mock.Mock())
+        model = t_nova_cluster.execute(m_scope)
+
+        compute_nodes = model.get_all_compute_nodes()
+        self.assertEqual(1, len(compute_nodes))
+        m_nova.return_value.get_compute_node_by_name.assert_any_call(
+            'hostone', servers=True, detailed=True)
+        m_nova.return_value.get_compute_node_by_name.assert_any_call(
+            'hosttwo', servers=True, detailed=True)
+        self.assertEqual(
+            m_nova.return_value.get_compute_node_by_name.call_count, 2)