root / snf-cyclades-app / synnefo / logic / management / commands / backend-update-status.py @ c7cbb6f3
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# Copyright 2011-2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and documentation are
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# those of the authors and should not be interpreted as representing official
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# policies, either expressed or implied, of GRNET S.A.
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#
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from optparse import make_option |
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from django.core.management.base import BaseCommand, CommandError |
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from synnefo import settings |
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import datetime |
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from synnefo.db.models import Backend |
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from synnefo.logic.backend import update_resources |
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class Command(BaseCommand): |
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can_import_settings = True
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help = "Update backend statistics, which are used for instance allocation."
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output_transaction = True # The management command runs inside |
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# an SQL transaction
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option_list = BaseCommand.option_list + ( |
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make_option('--backend-id', dest='backend_id', |
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help="Update statistics of only this backend"),
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make_option('--older-than', dest='older_than', metavar="MINUTES", |
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help="Update only backends that have not been updated for\
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MINUTES. Set to 0 to force update.")
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) |
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def handle(self, **options): |
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if options['backend_id']: |
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try:
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backend_id = int(options['backend_id']) |
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backends = [Backend.objects.get(id=backend_id)] |
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except ValueError: |
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raise CommandError("Wrong backend ID") |
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except Backend.DoesNotExist:
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raise CommandError("Backend not found in DB") |
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else:
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# XXX:filter drained ?
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backends = Backend.objects.all() |
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now = datetime.datetime.now() |
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if options['older_than'] is not None: |
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minutes = int(options['older_than']) |
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else:
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minutes = settings.BACKEND_REFRESH_MIN |
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delta = datetime.timedelta(minutes=minutes) |
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for b in backends: |
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if now > b.updated + delta:
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update_resources(b) |
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print 'Successfully updated backend with id: %d' % b.id |
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else:
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print 'Backend %d does not need update' % b.id |