+ gnocchi = GnocchiBackend(vim_account_id)
+ gnocchi.client.status.get()
+ return gnocchi
+
+ def _get_metric_type(self, metric_name: str, interface_name: str) -> MetricType:
+ if metric_name not in INTERFACE_METRICS:
+ return MetricType.INSTANCE
+ else:
+ if interface_name:
+ return MetricType.INTERFACE_ONE
+ return MetricType.INTERFACE_ALL
+
+
+class OpenstackBackend:
+ def collect_metric(self, metric_type: MetricType, metric_name: str, resource_id: str, interface_name: str):
+ pass
+
+
+class GnocchiBackend(OpenstackBackend):
+
+ def __init__(self, vim_account_id: str):
+ self.client = self._build_gnocchi_client(vim_account_id)
+ self.neutron = self._build_neutron_client(vim_account_id)
+
+ def _build_gnocchi_client(self, vim_account_id: str) -> gnocchi_client.Client:
+ sess = OpenstackUtils.get_session(vim_account_id)
+ return gnocchi_client.Client(session=sess)
+
+ def _build_neutron_client(self, vim_account_id: str) -> neutron_client.Client:
+ sess = OpenstackUtils.get_session(vim_account_id)
+ return neutron_client.Client(session=sess)
+
+ def collect_metric(self, metric_type: MetricType, metric_name: str, resource_id: str, interface_name: str):
+ if metric_type == MetricType.INTERFACE_ONE:
+ return self._collect_interface_one_metric(metric_name, resource_id, interface_name)
+
+ if metric_type == MetricType.INTERFACE_ALL:
+ return self._collect_interface_all_metric(metric_name, resource_id)
+
+ elif metric_type == MetricType.INSTANCE:
+ return self._collect_instance_metric(metric_name, resource_id)
+
+ else:
+ raise Exception('Unknown metric type %s' % metric_type.value)
+
+ def _collect_interface_one_metric(self, metric_name, resource_id, interface_name):
+ ports = self.neutron.list_ports(name=interface_name, device_id=resource_id)
+ if not ports or not ports['ports']:
+ raise Exception(
+ 'Port not found for interface %s on instance %s' % (interface_name, resource_id))
+ port = ports['ports'][0]
+ port_uuid = port['id'][:11]
+ tap_name = 'tap' + port_uuid
+ interfaces = self.client.resource.search(resource_type='instance_network_interface',
+ query={'=': {'name': tap_name}})
+ measures = self.client.metric.get_measures(metric_name,
+ resource_id=interfaces[0]['id'],
+ limit=1)
+ return measures[-1][2] if measures else None
+
+ def _collect_interface_all_metric(self, openstack_metric_name, resource_id):
+ total_measure = None
+ interfaces = self.client.resource.search(resource_type='instance_network_interface',
+ query={'=': {'instance_id': resource_id}})
+ for interface in interfaces: