root / snf-pithos-app / pithos / api / management / commands / pithos-usage.py @ 8108c68c
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# Copyright 2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from django.core.management.base import NoArgsCommand, CommandError |
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from collections import namedtuple |
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from optparse import make_option |
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from sqlalchemy import func |
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from sqlalchemy.sql import select, and_, or_ |
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from pithos.api.util import get_backend |
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from pithos.backends.modular import ( |
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CLUSTER_NORMAL, CLUSTER_HISTORY, CLUSTER_DELETED |
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) |
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clusters = (CLUSTER_NORMAL, CLUSTER_HISTORY, CLUSTER_DELETED) |
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Usage = namedtuple('Usage', ('node', 'path', 'size', 'cluster')) |
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GetQuota = namedtuple('GetQuota', ('entity', 'resource', 'key')) |
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class ResetHoldingPayload(namedtuple('ResetHoldingPayload', ( |
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'entity', 'resource', 'key', 'imported', 'exported', 'returned', 'released' |
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))): |
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__slots__ = () |
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def __str__(self): |
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return '%s: %s' % (self.entity, self.imported) |
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ENTITY_KEY = '1'
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backend = get_backend() |
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table = {} |
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table['nodes'] = backend.node.nodes
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table['versions'] = backend.node.versions
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table['policy'] = backend.node.policy
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conn = backend.node.conn |
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def _retrieve_user_nodes(users=()): |
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s = select([table['nodes'].c.path, table['nodes'].c.node]) |
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s = s.where(and_(table['nodes'].c.node != 0, |
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table['nodes'].c.parent == 0)) |
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if users:
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s = s.where(table['nodes'].c.path.in_(users))
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return conn.execute(s).fetchall()
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def _compute_usage(nodes): |
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usage = [] |
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append = usage.append |
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for path, node in nodes: |
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select_children = select( |
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[table['nodes'].c.node]).where(table['nodes'].c.parent == node) |
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select_descendants = select([table['nodes'].c.node]).where(
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or_(table['nodes'].c.parent.in_(select_children),
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table['nodes'].c.node.in_(select_children)))
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s = select([table['versions'].c.cluster,
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func.sum(table['versions'].c.size)])
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s = s.group_by(table['versions'].c.cluster)
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s = s.where(table['nodes'].c.node == table['versions'].c.node) |
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s = s.where(table['nodes'].c.node.in_(select_descendants))
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s = s.where(table['versions'].c.cluster == CLUSTER_NORMAL)
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d2 = dict(conn.execute(s).fetchall())
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try:
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size = d2[CLUSTER_NORMAL] |
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except KeyError: |
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size = 0
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append(Usage( |
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node=node, |
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path=path, |
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size=size, |
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cluster=CLUSTER_NORMAL)) |
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return usage
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def _get_quotaholder_usage(usage): |
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payload = [] |
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append = payload.append |
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[append(GetQuota( |
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entity=item.path, |
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resource='pithos+.diskspace',
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key=ENTITY_KEY |
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)) for item in usage] |
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result = backend.quotaholder.get_quota( |
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context={}, clientkey='pithos', get_quota=payload
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) |
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return dict((entity, imported - exported + returned - released) for ( |
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entity, resource, quantity, capacity, import_limit, export_limit, |
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imported, exported, returned, released, flags |
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) in result)
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def _prepare_reset_holding(usage, only_diverging=False): |
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"""Verify usage and set quotaholder user usage"""
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reset_holding = [] |
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append = reset_holding.append |
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quotaholder_usage = {} |
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if only_diverging:
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quotaholder_usage = _get_quotaholder_usage(usage) |
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for item in(usage): |
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if only_diverging and quotaholder_usage.get(item.path) == item.size: |
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continue
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if item.cluster == CLUSTER_NORMAL:
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append(ResetHoldingPayload( |
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entity=item.path, |
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resource='pithos+.diskspace',
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key=ENTITY_KEY, |
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imported=item.size, |
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exported=0,
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returned=0,
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released=0))
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return reset_holding
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class Command(NoArgsCommand): |
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help = "List and reset pithos usage"
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option_list = NoArgsCommand.option_list + ( |
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make_option('--list',
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dest='list',
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action="store_true",
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default=True,
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help="List usage for all or specified user"),
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make_option('--reset',
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dest='reset',
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action="store_true",
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default=False,
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help="Reset usage for all or specified users"),
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make_option('--diverging',
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dest='diverging',
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action="store_true",
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default=False,
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help=("List or reset diverging usages")),
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make_option('--user',
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dest='users',
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action='append',
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metavar='USER_UUID',
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help=("Specify which users --list or --reset applies."
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"This option can be repeated several times."
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"If no user is specified --list or --reset will be applied globally.")),
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) |
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def handle_noargs(self, **options): |
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try:
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user_nodes = _retrieve_user_nodes(options['users'])
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if not user_nodes: |
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raise CommandError('No users found.') |
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usage = _compute_usage(user_nodes) |
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reset_holding = _prepare_reset_holding( |
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usage, only_diverging=options['diverging']
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) |
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if options['list']: |
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print '\n'.join([str(i) for i in reset_holding]) |
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if options['reset']: |
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if not backend.quotaholder_enabled: |
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raise CommandError('Quotaholder component is not enabled') |
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if not backend.quotaholder_url: |
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raise CommandError('Quotaholder url is not set') |
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if not backend.quotaholder_token: |
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raise CommandError('Quotaholder token is not set') |
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while True: |
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result = backend.quotaholder.reset_holding( |
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context={}, |
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clientkey='pithos',
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reset_holding=reset_holding) |
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if not result: |
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break
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missing_entities = [reset_holding[x].entity for x in result] |
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self.stdout.write(
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'Unknown quotaholder users: %s\n' %
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', '.join(missing_entities))
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m = 'Retrying sending quota usage for the rest...\n'
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self.stdout.write(m)
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missing_indexes = set(result)
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reset_holding = [x for i, x in enumerate(reset_holding) |
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if i not in missing_indexes] |
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finally:
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backend.close() |