+
+ def _get_backend(self, vim_account: dict):
+ try:
+ ceilometer = CeilometerBackend(vim_account)
+ ceilometer.client.capabilities.get()
+ return ceilometer
+ except (HTTPException, EndpointNotFound):
+ gnocchi = GnocchiBackend(vim_account)
+ gnocchi.client.metric.list(limit=1)
+ 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: dict):
+ self.client = self._build_gnocchi_client(vim_account)
+ self.neutron = self._build_neutron_client(vim_account)
+
+ def _build_gnocchi_client(self, vim_account: dict) -> gnocchi_client.Client:
+ sess = OpenstackUtils.get_session(vim_account)
+ return gnocchi_client.Client(session=sess)
+
+ def _build_neutron_client(self, vim_account: dict) -> neutron_client.Client:
+ sess = OpenstackUtils.get_session(vim_account)
+ 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:
+ try:
+ measures = self.client.metric.get_measures(openstack_metric_name,
+ resource_id=interface['id'],
+ limit=1)
+ if measures:
+ if not total_measure:
+ total_measure = 0.0
+ total_measure += measures[-1][2]
+
+ except gnocchiclient.exceptions.NotFound as e:
+ log.debug("No metric %s found for interface %s: %s", openstack_metric_name,
+ interface['id'], e)
+ return total_measure
+
+ def _collect_instance_metric(self, openstack_metric_name, resource_id):
+ value = None
+ try:
+ aggregation = METRIC_AGGREGATORS.get(openstack_metric_name)
+
+ measures = self.client.metric.get_measures(openstack_metric_name,
+ aggregation=aggregation,
+ start=time.time() - 1200,
+ resource_id=resource_id)
+ # measures[-1][0] is the time of the reporting interval
+ # measures[-1][1] is the durcation of the reporting interval
+ # measures[-1][2] is the value of the metric
+ if measures:
+ value = measures[-1][2]
+ if aggregation:
+ # If this is an aggregate, we need to divide the total over the reported time period.
+ value = value / measures[-1][1]
+ if openstack_metric_name in METRIC_MULTIPLIERS:
+ value = value * METRIC_MULTIPLIERS[openstack_metric_name]
+ except gnocchiclient.exceptions.NotFound as e:
+ log.debug("No metric %s found for instance %s: %s", openstack_metric_name, resource_id,
+ e)
+ return value
+
+
+class CeilometerBackend(OpenstackBackend):
+ def __init__(self, vim_account: dict):
+ self.client = self._build_ceilometer_client(vim_account)
+
+ def _build_ceilometer_client(self, vim_account: dict) -> ceilometer_client.Client:
+ sess = OpenstackUtils.get_session(vim_account)
+ return ceilometer_client.Client("2", session=sess)
+
+ def collect_metric(self, metric_type: MetricType, metric_name: str, resource_id: str, interface_name: str):
+ if metric_type != MetricType.INSTANCE:
+ raise NotImplementedError('Ceilometer backend only support instance metrics')
+ measures = self.client.samples.list(meter_name=metric_name, limit=1, q=[
+ {'field': 'resource_id', 'op': 'eq', 'value': resource_id}])
+ return measures[0].counter_volume if measures else None