/
quotas.py
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/
quotas.py
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from collections import defaultdict
import itertools
import logging
from django.utils.translation import ugettext_lazy as _
from horizon import exceptions
from horizon.utils.memoized import memoized # noqa
from openstack_dashboard.api import base
from openstack_dashboard.api import cinder
from openstack_dashboard.api import network
from openstack_dashboard.api import neutron
from openstack_dashboard.api import nova
LOG = logging.getLogger(__name__)
NOVA_QUOTA_FIELDS = ("metadata_items",
"cores",
"instances",
"injected_files",
"injected_file_content_bytes",
"ram",
"floating_ips",
"fixed_ips",
"security_groups",
"security_group_rules",)
MISSING_QUOTA_FIELDS = ("key_pairs",
"injected_file_path_bytes",)
CINDER_QUOTA_FIELDS = ("volumes",
"snapshots",
"gigabytes",)
NEUTRON_QUOTA_FIELDS = ("network",
"subnet",
"port",
"router",
"floatingip",
"security_group",
"security_group_rule",
)
QUOTA_FIELDS = NOVA_QUOTA_FIELDS + CINDER_QUOTA_FIELDS + NEUTRON_QUOTA_FIELDS
class QuotaUsage(dict):
"""Tracks quota limit, used, and available for a given set of quotas."""
def __init__(self):
self.usages = defaultdict(dict)
def __contains__(self, key):
return key in self.usages
def __getitem__(self, key):
return self.usages[key]
def __setitem__(self, key, value):
raise NotImplementedError("Directly setting QuotaUsage values is not "
"supported. Please use the add_quota and "
"tally methods.")
def __repr__(self):
return repr(dict(self.usages))
def get(self, key, default=None):
return self.usages.get(key, default)
def add_quota(self, quota):
"""Adds an internal tracking reference for the given quota."""
if quota.limit is None or quota.limit == -1:
# Handle "unlimited" quotas.
self.usages[quota.name]['quota'] = float("inf")
self.usages[quota.name]['available'] = float("inf")
else:
self.usages[quota.name]['quota'] = int(quota.limit)
def tally(self, name, value):
"""Adds to the "used" metric for the given quota."""
value = value or 0 # Protection against None.
# Start at 0 if this is the first value.
if 'used' not in self.usages[name]:
self.usages[name]['used'] = 0
# Increment our usage and update the "available" metric.
self.usages[name]['used'] += int(value) # Fail if can't coerce to int.
self.update_available(name)
def update_available(self, name):
"""Updates the "available" metric for the given quota."""
available = self.usages[name]['quota'] - self.usages[name]['used']
if available < 0:
available = 0
self.usages[name]['available'] = available
def _get_quota_data(request, method_name, disabled_quotas=None,
tenant_id=None):
quotasets = []
if not tenant_id:
tenant_id = request.user.tenant_id
quotasets.append(getattr(nova, method_name)(request, tenant_id))
qs = base.QuotaSet()
if disabled_quotas is None:
disabled_quotas = get_disabled_quotas(request)
if 'volumes' not in disabled_quotas:
quotasets.append(getattr(cinder, method_name)(request, tenant_id))
for quota in itertools.chain(*quotasets):
if quota.name not in disabled_quotas:
qs[quota.name] = quota.limit
return qs
def get_default_quota_data(request, disabled_quotas=None, tenant_id=None):
return _get_quota_data(request,
"default_quota_get",
disabled_quotas=disabled_quotas,
tenant_id=tenant_id)
def get_tenant_quota_data(request, disabled_quotas=None, tenant_id=None):
qs = _get_quota_data(request,
"tenant_quota_get",
disabled_quotas=disabled_quotas,
tenant_id=tenant_id)
# TODO(jpichon): There is no API to get the default system quotas
# in Neutron (cf. LP#1204956), so for now handle tenant quotas here.
# This should be handled in _get_quota_data() eventually.
if disabled_quotas and 'floating_ips' in disabled_quotas:
# Neutron with quota extension disabled
if 'floatingip' in disabled_quotas:
qs.add(base.QuotaSet({'floating_ips': -1}))
# Neutron with quota extension enabled
else:
tenant_id = tenant_id or request.user.tenant_id
neutron_quotas = neutron.tenant_quota_get(request, tenant_id)
# Rename floatingip to floating_ips since that's how it's
# expected in some places (e.g. Security & Access' Floating IPs)
fips_quota = neutron_quotas.get('floatingip').limit
qs.add(base.QuotaSet({'floating_ips': fips_quota}))
return qs
def get_disabled_quotas(request):
disabled_quotas = []
# Cinder
if not base.is_service_enabled(request, 'volume'):
disabled_quotas.extend(CINDER_QUOTA_FIELDS)
# Neutron
if not base.is_service_enabled(request, 'network'):
disabled_quotas.extend(NEUTRON_QUOTA_FIELDS)
else:
# Remove the nova network quotas
disabled_quotas.extend(['floating_ips', 'fixed_ips'])
if neutron.is_extension_supported(request, 'security-group'):
# If Neutron security group is supported, disable Nova quotas
disabled_quotas.extend(['security_groups', 'security_group_rules'])
else:
# If Nova security group is used, disable Neutron quotas
disabled_quotas.extend(['security_group', 'security_group_rule'])
try:
if not neutron.is_quotas_extension_supported(request):
disabled_quotas.extend(NEUTRON_QUOTA_FIELDS)
except Exception:
LOG.exception("There was an error checking if the Neutron "
"quotas extension is enabled.")
return disabled_quotas
@memoized
def tenant_quota_usages(request):
# Get our quotas and construct our usage object.
disabled_quotas = get_disabled_quotas(request)
usages = QuotaUsage()
for quota in get_tenant_quota_data(request,
disabled_quotas=disabled_quotas):
usages.add_quota(quota)
# Get our usages.
floating_ips = network.tenant_floating_ip_list(request)
flavors = dict([(f.id, f) for f in nova.flavor_list(request)])
instances, has_more = nova.server_list(request)
# Fetch deleted flavors if necessary.
missing_flavors = [instance.flavor['id'] for instance in instances
if instance.flavor['id'] not in flavors]
for missing in missing_flavors:
if missing not in flavors:
try:
flavors[missing] = nova.flavor_get(request, missing)
except Exception:
flavors[missing] = {}
exceptions.handle(request, ignore=True)
usages.tally('instances', len(instances))
usages.tally('floating_ips', len(floating_ips))
if 'volumes' not in disabled_quotas:
volumes = cinder.volume_list(request)
snapshots = cinder.volume_snapshot_list(request)
usages.tally('gigabytes', sum([int(v.size) for v in volumes]))
usages.tally('volumes', len(volumes))
usages.tally('snapshots', len(snapshots))
# Sum our usage based on the flavors of the instances.
for flavor in [flavors[instance.flavor['id']] for instance in instances]:
usages.tally('cores', getattr(flavor, 'vcpus', None))
usages.tally('ram', getattr(flavor, 'ram', None))
# Initialise the tally if no instances have been launched yet
if len(instances) == 0:
usages.tally('cores', 0)
usages.tally('ram', 0)
return usages
def tenant_limit_usages(request):
#TODO(licostan): This method shall be removed from Quota module.
#ProjectUsage/BaseUsage maybe used instead on volume/image dashboards.
limits = {}
try:
limits.update(nova.tenant_absolute_limits(request))
except Exception:
msg = _("Unable to retrieve compute limit information.")
exceptions.handle(request, msg)
if base.is_service_enabled(request, 'volume'):
try:
limits.update(cinder.tenant_absolute_limits(request))
volumes = cinder.volume_list(request)
snapshots = cinder.volume_snapshot_list(request)
total_size = sum([getattr(volume, 'size', 0) for volume
in volumes])
limits['gigabytesUsed'] = total_size
limits['volumesUsed'] = len(volumes)
limits['snapshotsUsed'] = len(snapshots)
except Exception:
msg = _("Unable to retrieve volume limit information.")
exceptions.handle(request, msg)
return limits