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 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_reservation(self, reservation_id, new_values):
"""Updates an instance reservation with requested parameters.
This method allows users to update an instance reservation under the
following conditions.
- If an instance reservation has not started yet
- vcpus, memory_mb disk_gb and amount can be updateable unless
Blazar can accommodate the new request.
- If an instance reservation has already started
- only amount is increasable.
"""
self._validate_reservation_params(new_values)
reservation = db_api.reservation_get(reservation_id)
lease = db_api.lease_get(reservation['lease_id'])
updatable = [
'vcpus', 'memory_mb', 'disk_gb', 'affinity', 'amount',
'resource_properties'
]
if (not any([k in updatable for k in new_values.keys()])
and new_values['start_date'] >= lease['start_date']
and new_values['end_date'] <= lease['end_date']):
# no update because of just shortening the reservation time
return
if (reservation['status'] == 'active'
and any([k in updatable[:-1] for k in new_values.keys()])):
msg = "An active reservation only accepts to update amount."
raise mgr_exceptions.InvalidStateUpdate(msg)
if reservation['status'] == 'error':
msg = "An error reservation doesn't accept an updating request."
raise mgr_exceptions.InvalidStateUpdate(msg)
if new_values.get('affinity', None):
new_values['affinity'] = bool_from_string(new_values['affinity'],
default=None)
for key in updatable:
if key not in new_values:
new_values[key] = reservation[key]
changed_hosts = self.pickup_hosts(reservation_id, new_values)
if (reservation['status'] == 'active'
and len(changed_hosts['removed']) > 0):
err_msg = ("Instance reservation doesn't allow to reduce/replace "
"reserved instance slots when the reservation is in "
"active status.")
raise mgr_exceptions.CantUpdateParameter(err_msg)
db_api.instance_reservation_update(
reservation['resource_id'],
{key: new_values[key]
for key in updatable})
self.update_host_allocations(changed_hosts['added'],
changed_hosts['removed'], reservation_id)
try:
self.update_resources(reservation_id)
except mgr_exceptions.NovaClientError:
raise
