def allowed_instances(context, requested_instances, instance_type):
"""Check quota and return min(requested_instances, allowed_instances)."""
project_id = context.project_id
context = context.elevated()
requested_cores = requested_instances * instance_type['vcpus']
requested_ram = requested_instances * instance_type['memory_mb']
usage = db.instance_data_get_for_project(context, project_id)
used_instances, used_cores, used_ram = usage
quota = get_project_quotas(context, project_id)
allowed_instances = _get_request_allotment(requested_instances,
used_instances,
quota['instances'])
allowed_cores = _get_request_allotment(requested_cores, used_cores,
quota['cores'])
allowed_ram = _get_request_allotment(requested_ram, used_ram, quota['ram'])
if instance_type['vcpus']:
allowed_instances = min(allowed_instances,
allowed_cores // instance_type['vcpus'])
if instance_type['memory_mb']:
allowed_instances = min(allowed_instances,
allowed_ram // instance_type['memory_mb'])
return min(requested_instances, allowed_instances)
def _sync_instances(context, project_id, session):
return dict(zip(('instances', 'cores', 'ram'),
db.instance_data_get_for_project(
context, project_id, session=session)))
def _sync_instances(context, project_id, session):
return dict(
zip(('instances', 'cores', 'ram'),
db.instance_data_get_for_project(context,
project_id,
session=session)))
