def reserve_resource(self, reservation_id, values):
self.validate_reservation_param(values)
hosts = self.pickup_hosts(reservation_id, values)
instance_reservation_val = {
'reservation_id': reservation_id,
'vcpus': values['vcpus'],
'memory_mb': values['memory_mb'],
'disk_gb': values['disk_gb'],
'amount': values['amount'],
'affinity': bool_from_string(values['affinity'], default=None),
'resource_properties': values['resource_properties']
}
instance_reservation = db_api.instance_reservation_create(
instance_reservation_val)
for host_id in hosts['added']:
db_api.host_allocation_create({'compute_host_id': host_id,
'reservation_id': reservation_id})
try:
flavor, group, pool = self._create_resources(instance_reservation)
except nova_exceptions.ClientException:
LOG.exception("Failed to create Nova resources "
"for reservation %s", reservation_id)
self.cleanup_resources(instance_reservation)
raise mgr_exceptions.NovaClientError()
db_api.instance_reservation_update(instance_reservation['id'],
{'flavor_id': flavor.id,
'server_group_id': group.id,
'aggregate_id': pool.id})
return instance_reservation['id']
def update_resources(self, reservation_id):
"""Updates reserved resources in Nova.
This method updates reserved resources in Compute service. If the
reservation is in active status, it adds new allocated hosts into
a reserved aggregate. If the reservation is not started yet, it
updates a reserved flavor.
"""
reservation = db_api.reservation_get(reservation_id)
if reservation['status'] == 'active':
pool = nova.ReservationPool()
# Dict of number of instances to reserve on a host keyed by the
# host id
allocation_map = collections.defaultdict(lambda: 0)
for allocation in db_api.host_allocation_get_all_by_values(
reservation_id=reservation['id']):
host_id = allocation['compute_host_id']
allocation_map[host_id] += 1
for host_id, num in allocation_map.items():
host = db_api.host_get(host_id)
try:
pool.add_computehost(reservation['aggregate_id'],
host['service_name'],
stay_in=True)
except mgr_exceptions.AggregateAlreadyHasHost:
pass
except nova_exceptions.ClientException:
err_msg = ('Fail to add host %s to aggregate %s.' %
(host, reservation['aggregate_id']))
raise mgr_exceptions.NovaClientError(err_msg)
self.placement_client.update_reservation_inventory(
host['hypervisor_hostname'], reservation['id'], num)
else:
try:
self.nova.nova.flavors.delete(reservation['id'])
self._create_flavor(reservation['id'], reservation['vcpus'],
reservation['memory_mb'],
reservation['disk_gb'],
reservation['server_group_id'])
except nova_exceptions.ClientException:
LOG.exception(
"Failed to update Nova resources "
"for reservation %s", reservation['id'])
raise mgr_exceptions.NovaClientError()
def reserve_resource(self, reservation_id, values):
self.validate_reservation_param(values)
# TODO(masahito) the instance reservation plugin only supports
# anti-affinity rule in short-term goal.
if bool_from_string(values['affinity']):
raise exceptions.BlazarException('affinity = True is not '
'supported.')
hosts = self.pickup_hosts(reservation_id, values)
if len(hosts['added']) < values['amount']:
raise mgr_exceptions.HostNotFound("The reservation can't be "
"accommodate because of less "
"capacity.")
instance_reservation_val = {
'reservation_id': reservation_id,
'vcpus': values['vcpus'],
'memory_mb': values['memory_mb'],
'disk_gb': values['disk_gb'],
'amount': values['amount'],
'affinity': bool_from_string(values['affinity']),
}
instance_reservation = db_api.instance_reservation_create(
instance_reservation_val)
for host_id in hosts['added']:
db_api.host_allocation_create({
'compute_host_id': host_id,
'reservation_id': reservation_id
})
try:
flavor, group, pool = self._create_resources(instance_reservation)
except nova_exceptions.ClientException:
LOG.exception(
"Failed to create Nova resources "
"for reservation %s", reservation_id)
self.cleanup_resources(instance_reservation)
raise mgr_exceptions.NovaClientError()
db_api.instance_reservation_update(
instance_reservation['id'], {
'flavor_id': flavor.id,
'server_group_id': group.id,
'aggregate_id': pool.id
})
return instance_reservation['id']
def update_resources(self, reservation_id):
"""Updates reserved resources in Nova.
This method updates reserved resources in Compute service. If the
reservation is in active status, it adds new allocated hosts into
a reserved aggregate. If the reservation is not started yet, it
updates a reserved flavor.
"""
reservation = db_api.reservation_get(reservation_id)
if reservation['status'] == 'active':
pool = nova.ReservationPool()
for allocation in db_api.host_allocation_get_all_by_values(
reservation_id=reservation['id']):
host = db_api.host_get(allocation['compute_host_id'])
try:
pool.add_computehost(reservation['aggregate_id'],
host['service_name'],
stay_in=True)
except mgr_exceptions.AggregateAlreadyHasHost:
pass
except nova_exceptions.ClientException:
err_msg = ('Fail to add host %s to aggregate %s.' %
(host, reservation['aggregate_id']))
raise mgr_exceptions.NovaClientError(err_msg)
else:
try:
self.nova.nova.flavors.delete(reservation['id'])
self._create_flavor(reservation['id'], reservation['vcpus'],
reservation['memory_mb'],
reservation['disk_gb'],
reservation['server_group_id'])
except nova_exceptions.ClientException:
LOG.exception(
"Failed to update Nova resources "
"for reservation %s", reservation['id'])
raise mgr_exceptions.NovaClientError()
