def _check_num_keypairs_quota(self, context, count):
keypair_resource = self.quota.resources['keypairs']
quotas = self.quota.get_quota_limit_and_usage(
context, {'keyparis': keypair_resource}, context.tenant)
limit = quotas['keypairs']['limit']
in_use = quotas['keypairs']['in_use']
reserved = quotas['keypairs']['reserved']
available_quota = limit - in_use - reserved
if count <= available_quota:
return count
else:
raise exception.OverQuota(overs='keypairs')
def _check_num_servers_quota(self, context, min_count, max_count):
ins_resource = self.quota.resources['servers']
quotas = self.quota.get_quota_limit_and_usage(
context, {'servers': ins_resource}, context.tenant)
limit = quotas['servers']['limit']
in_use = quotas['servers']['in_use']
reserved = quotas['servers']['reserved']
available_quota = limit - in_use - reserved
if max_count <= available_quota:
return max_count
elif min_count <= available_quota and max_count > available_quota:
return available_quota
else:
raise exception.OverQuota(overs='servers')
def quota_reserve(self,
context,
resources,
quotas,
deltas,
expire,
until_refresh,
max_age,
project_id,
is_allocated_reserve=False):
# NOTE(wanghao): Now we still doesn't support contenxt.elevated() yet.
# We can support it later.
elevated = context
with _session_for_write() as session:
if project_id is None:
project_id = context.project_id
# Get the current usages
usages = self._get_quota_usages(context, project_id)
allocated = self.quota_allocated_get_all_by_project(
context, project_id)
allocated.pop('project_id')
# Handle usage refresh
work = set(deltas.keys())
while work:
resource = work.pop()
# Do we need to refresh the usage?
refresh = False
if resource not in usages:
usages[resource] = self._quota_usage_create(
elevated,
project_id,
resource,
0,
0,
until_refresh or None,
session=session)
refresh = True
elif usages[resource].in_use < 0:
refresh = True
elif usages[resource].until_refresh is not None:
usages[resource].until_refresh -= 1
if usages[resource].until_refresh <= 0:
refresh = True
elif max_age and usages[resource].updated_at is not None and (
(usages[resource].updated_at - timeutils.utcnow()).seconds
>= max_age):
refresh = True
# OK, refresh the usage
if refresh:
# Grab the sync routine
sync = self.QUOTA_SYNC_FUNCTIONS[resources[resource].sync]
updates = sync(elevated, project_id)
for res, in_use in updates.items():
# Make sure we have a destination for the usage!
if res not in usages:
usages[res] = self._quota_usage_create(
elevated,
project_id,
res,
0,
0,
until_refresh or None,
session=session)
# Update the usage
usages[res].in_use = in_use
usages[res].until_refresh = until_refresh or None
# Because more than one resource may be refreshed
# by the call to the sync routine, and we don't
# want to double-sync, we make sure all refreshed
# resources are dropped from the work set.
work.discard(res)
# Check for deltas that would go negative
if is_allocated_reserve:
unders = [
r for r, delta in deltas.items()
if delta < 0 and delta + allocated.get(r, 0) < 0
]
else:
unders = [
r for r, delta in deltas.items()
if delta < 0 and delta + usages[r].in_use < 0
]
# Now, let's check the quotas
overs = [
r for r, delta in deltas.items()
if quotas[r] >= 0 and delta >= 0 and quotas[r] < delta +
usages[r].total + allocated.get(r, 0)
]
# Create the reservations
if not overs:
reservations = []
for resource, delta in deltas.items():
usage = usages[resource]
allocated_id = None
if is_allocated_reserve:
try:
quota = self.quota_get(context, project_id,
resource)
except exception.ProjectQuotaNotFound:
# If we were using the default quota, create DB
# entry
quota = self.quota_create(context, project_id,
resource,
quotas[resource], 0)
# Since there's no reserved/total for allocated, update
# allocated immediately and subtract on rollback
# if needed
self.quota_allocated_update(context, project_id,
resource,
quota.allocated + delta)
allocated_id = quota.id
usage = None
reservation = self._reservation_create(
elevated,
uuidutils.generate_uuid(),
usage,
project_id,
resource,
delta,
expire,
session=session,
allocated_id=allocated_id)
reservations.append(reservation)
# Also update the reserved quantity
if delta > 0 and not is_allocated_reserve:
usages[resource].reserved += delta
if unders:
LOG.warning(
"Change will make usage less than 0 for the "
"following resources: %s", unders)
if overs:
usages = {
k: dict(in_use=v.in_use,
reserved=v.reserved,
allocated=allocated.get(k, 0))
for k, v in usages.items()
}
raise exception.OverQuota(overs=sorted(overs),
quotas=quotas,
usages=usages)
return reservations