def get_compute_node(self, context, node_uuid):
query = model_query(models.ComputeNode)
query = query.filter_by(uuid=node_uuid)
try:
return query.one()
except NoResultFound:
raise exception.ComputeNodeNotFound(compute_node=node_uuid)
def destroy_compute_node(self, context, node_uuid):
session = get_session()
with session.begin():
query = model_query(models.ComputeNode, session=session)
query = query.filter_by(uuid=node_uuid)
count = query.delete()
if count != 1:
raise exception.ComputeNodeNotFound(compute_node=node_uuid)
def get_compute_node_by_hostname(self, context, hostname):
query = model_query(models.ComputeNode)
query = query.filter_by(hostname=hostname)
try:
return query.one()
except NoResultFound:
raise exception.ComputeNodeNotFound(compute_node=hostname)
except MultipleResultsFound:
raise exception.Conflict('Multiple compute nodes exist with same '
'hostname. Please use the uuid instead.')
def get_compute_node(self, context, node_uuid):
try:
node = None
res = self.client.read('/compute_nodes/' + node_uuid)
node = translate_etcd_result(res, 'compute_node')
except etcd.EtcdKeyNotFound:
raise exception.ComputeNodeNotFound(compute_node=node_uuid)
except Exception as e:
LOG.error('Error occurred while retrieving zun compute nodes: %s',
six.text_type(e))
raise
return node
def _do_update_compute_node(self, node_uuid, values):
session = get_session()
with session.begin():
query = model_query(models.ComputeNode, session=session)
query = query.filter_by(uuid=node_uuid)
try:
ref = query.with_lockmode('update').one()
except NoResultFound:
raise exception.ComputeNodeNotFound(compute_node=node_uuid)
ref.update(values)
return ref
def update_compute_node(self, context, node_uuid, values):
if 'uuid' in values:
msg = _('Cannot overwrite UUID for an existing node.')
raise exception.InvalidParameterValue(err=msg)
try:
target = self.client.read('/compute_nodes/' + node_uuid)
target_value = json.loads(target.value)
target_value.update(values)
target.value = json.dumps(target_value)
self.client.update(target)
except etcd.EtcdKeyNotFound:
raise exception.ComputeNodeNotFound(compute_node=node_uuid)
except Exception as e:
LOG.error('Error occurred while updating compute node: %s',
six.text_type(e))
raise
return translate_etcd_result(target, 'compute_node')
def get_compute_node_by_hostname(self, context, hostname):
"""Return a compute node.
:param context: The security context
:param hostname: The hostname of a compute node.
:returns: A compute node.
"""
try:
compute_nodes = self.list_compute_nodes(
context, filters={'hostname': hostname})
if compute_nodes:
return compute_nodes[0]
else:
raise exception.ComputeNodeNotFound(compute_node=hostname)
except Exception as e:
LOG.error('Error occurred while retrieving compute node: %s',
six.text_type(e))
raise
