OpenStack Study: quota_sets.py

OpenStack Index

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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.

import six.moves.urllib.parse as urlparse

import webob

from nova.api.openstack import extensions

from nova.api.openstack import wsgi

import nova.context

from nova import db

from nova import exception

from nova.openstack.common.gettextutils import _

from nova.openstack.common import log as logging

from nova.openstack.common import strutils

from nova import quota

from nova import utils

ALIAS = "os-quota-sets"

QUOTAS = quota.QUOTAS

LOG = logging.getLogger(__name__)

FILTERED_QUOTAS = ['injected_files', 'injected_file_content_bytes',

'injected_file_path_bytes']

authorize_update = extensions.extension_authorizer('compute',

'v3:%s:update' % ALIAS)

authorize_show = extensions.extension_authorizer('compute',

'v3:%s:show' % ALIAS)

authorize_delete = extensions.extension_authorizer('compute',

'v3:%s:delete' % ALIAS)

authorize_detail = extensions.extension_authorizer('compute',

'v3:%s:detail' % ALIAS)

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class QuotaSetsController(wsgi.Controller):

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def _format_quota_set(self, project_id, quota_set):

"""Convert the quota object to a result dict."""

quota_set.update(id=project_id)

return dict(quota_set=quota_set)

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def _validate_quota_limit(self, limit, minimum, maximum):

# NOTE: -1 is a flag value for unlimited

if limit < -1:

msg = _("Quota limit must be -1 or greater.")

raise webob.exc.HTTPBadRequest(explanation=msg)

if ((limit < minimum) and

(maximum != -1 or (maximum == -1 and limit != -1))):

msg = _("Quota limit must be greater than %s.") % minimum

raise webob.exc.HTTPBadRequest(explanation=msg)

if maximum != -1 and limit > maximum:

msg = _("Quota limit must be less than %s.") % maximum

raise webob.exc.HTTPBadRequest(explanation=msg)

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def _get_quotas(self, context, id, user_id=None, usages=False):

if user_id:

values = QUOTAS.get_user_quotas(context, id, user_id,

usages=usages)

else:

values = QUOTAS.get_project_quotas(context, id, usages=usages)

values = dict((k, v) for k, v in values.items() if k not in

return dict((k, v['limit']) for k, v in values.items())

@extensions.expected_errors(403)

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def show(self, req, id):

context = req.environ['nova.context']

authorize_show(context)

params = urlparse.parse_qs(req.environ.get('QUERY_STRING', ''))

user_id = params.get('user_id', [None])[0]

try:

nova.context.authorize_project_context(context, id)

return self._format_quota_set(id,

self._get_quotas(context, id, user_id=user_id))

except exception.NotAuthorized:

raise webob.exc.HTTPForbidden()

@extensions.expected_errors(403)

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def detail(self, req, id):

context = req.environ['nova.context']

authorize_detail(context)

user_id = req.GET.get('user_id', None)

try:

nova.context.authorize_project_context(context, id)

return self._format_quota_set(id, self._get_quotas(context, id,

user_id=user_id,

usages=True))

except exception.NotAuthorized:

raise webob.exc.HTTPForbidden()

@extensions.expected_errors((400, 403))

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def update(self, req, id, body):

context = req.environ['nova.context']

authorize_update(context)

project_id = id

params = urlparse.parse_qs(req.environ.get('QUERY_STRING', ''))

user_id = params.get('user_id', [None])[0]

bad_keys = []

force_update = False

if not self.is_valid_body(body, 'quota_set'):

msg = _("quota_set not specified")

raise webob.exc.HTTPBadRequest(explanation=msg)

quota_set = body['quota_set']

for key, value in quota_set.items():

if ((key not in QUOTAS or key in FILTERED_QUOTAS)

force_update = strutils.bool_from_string(value)

elif key != 'force' and value:

try:

value = utils.validate_integer(

value, key)

except exception.InvalidInput as e:

LOG.warn(e.format_message())

raise webob.exc.HTTPBadRequest(

explanation=e.format_message())

if len(bad_keys) > 0:

msg = _("Bad key(s) %s in quota_set") % ",".join(bad_keys)

raise webob.exc.HTTPBadRequest(explanation=msg)

try:

settable_quotas = QUOTAS.get_settable_quotas(context, project_id,

user_id=user_id)

except exception.NotAuthorized:

raise webob.exc.HTTPForbidden()

try:

quotas = self._get_quotas(context, id, user_id=user_id,

usages=True)

except exception.NotAuthorized:

raise webob.exc.HTTPForbidden()

LOG.debug(_("Force update quotas: %s"), force_update)

for key, value in body['quota_set'].iteritems():

if key == 'force' or (not value and value != 0):

continue

# validate whether already used and reserved exceeds the new

# quota, this check will be ignored if admin want to force

# update

value = int(value)

if force_update is not True and value >= 0:

quota_value = quotas.get(key)

if quota_value and quota_value['limit'] >= 0:

quota_used = (quota_value['in_use'] +

quota_value['reserved'])

LOG.debug(_("Quota %(key)s used: %(quota_used)s, "

"value: %(value)s."),

{'key': key, 'quota_used': quota_used,

'value': value})

if quota_used > value:

msg = (_("Quota value %(value)s for %(key)s are "

"less than already used and reserved "

"%(quota_used)s") %

{'value': value, 'key': key,

'quota_used': quota_used})

raise webob.exc.HTTPBadRequest(explanation=msg)

minimum = settable_quotas[key]['minimum']

maximum = settable_quotas[key]['maximum']

self._validate_quota_limit(value, minimum, maximum)

try:

db.quota_create(context, project_id, key, value,

user_id=user_id)

except exception.QuotaExists:

db.quota_update(context, project_id, key, value,

user_id=user_id)

except exception.AdminRequired:

raise webob.exc.HTTPForbidden()

return self._format_quota_set(id, self._get_quotas(context, id,

user_id=user_id))

@extensions.expected_errors(())

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def defaults(self, req, id):

context = req.environ['nova.context']

authorize_show(context)

values = QUOTAS.get_defaults(context)

values = dict((k, v) for k, v in values.items() if k not in

FILTERED_QUOTAS)

return self._format_quota_set(id, values)

@extensions.expected_errors(403)

@wsgi.response(204)

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def delete(self, req, id):

context = req.environ['nova.context']

authorize_delete(context)

params = urlparse.parse_qs(req.environ.get('QUERY_STRING', ''))

user_id = params.get('user_id', [None])[0]

try:

nova.context.authorize_project_context(context, id)

if user_id:

QUOTAS.destroy_all_by_project_and_user(context,

id, user_id)

else:

QUOTAS.destroy_all_by_project(context, id)

except exception.NotAuthorized:

raise webob.exc.HTTPForbidden()

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class QuotaSets(extensions.V3APIExtensionBase):

"""Quotas management support."""

name = "Quotas"

alias = ALIAS

version = 1

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def get_resources(self):

resources = []

res = extensions.ResourceExtension(ALIAS,

QuotaSetsController(),

member_actions={'defaults': 'GET',

'detail': 'GET'})

resources.append(res)

return resources

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def get_controller_extensions(self):

return []