root / snf-cyclades-app / synnefo / logic / management / commands / reconcile.py @ c4e55622
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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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"""Reconciliation management command
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Management command to reconcile the contents of the Synnefo DB with
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the state of the Ganeti backend. See docstring on top of
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logic/reconciliation.py for a description of reconciliation rules.
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"""
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import sys |
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import datetime |
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from optparse import make_option |
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from django.conf import settings |
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from django.core.management.base import BaseCommand, CommandError |
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from synnefo.db.models import VirtualMachine |
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from synnefo.logic import reconciliation, backend |
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from synnefo.util.rapi import GanetiRapiClient |
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class Command(BaseCommand): |
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can_import_settings = True
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help = 'Reconcile contents of Synnefo DB with state of Ganeti backend'
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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('--detect-stale', action='store_true', dest='detect_stale', |
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default=False, help='Detect stale VM entries in DB'), |
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make_option('--detect-orphans', action='store_true', |
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dest='detect_orphans',
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default=False, help='Detect orphan instances in Ganeti'), |
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make_option('--detect-unsynced', action='store_true', |
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dest='detect_unsynced',
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default=False, help='Detect unsynced operstate between ' + |
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'DB and Ganeti'),
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make_option('--detect-all', action='store_true', |
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dest='detect_all',
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default=False, help='Enable all --detect-* arguments'), |
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make_option('--fix-stale', action='store_true', dest='fix_stale', |
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default=False, help='Fix (remove) stale DB entries in DB'), |
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make_option('--fix-orphans', action='store_true', dest='fix_orphans', |
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default=False, help='Fix (remove) orphan Ganeti VMs'), |
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make_option('--fix-unsynced', action='store_true', dest='fix_unsynced', |
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default=False, help='Fix server operstate in DB, set ' + |
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'from Ganeti'),
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make_option('--fix-all', action='store_true', dest='fix_all', |
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default=False, help='Enable all --fix-* arguments')) |
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def _process_args(self, options): |
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keys_detect = [k for k in options.keys() if k.startswith('detect_')] |
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keys_fix = [k for k in options.keys() if k.startswith('fix_')] |
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if options['detect_all']: |
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for kd in keys_detect: |
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options[kd] = True
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if options['fix_all']: |
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for kf in keys_fix: |
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options[kf] = True
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if not reduce(lambda x, y: x or y, |
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map(lambda x: options[x], keys_detect)): |
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raise CommandError("At least one of --detect-* must be specified") |
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for kf in keys_fix: |
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kd = kf.replace('fix_', 'detect_', 1) |
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if (options[kf] and not options[kd]): |
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raise CommandError("Cannot use --%s without corresponding " |
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"--%s argument" % (kf, kd))
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def handle(self, **options): |
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verbosity = int(options['verbosity']) |
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self._process_args(options)
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D = reconciliation.get_servers_from_db() |
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G = reconciliation.get_instances_from_ganeti() |
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#
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# Detect problems
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#
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if options['detect_stale']: |
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stale = reconciliation.stale_servers_in_db(D, G) |
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if len(stale) > 0: |
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print >> sys.stderr, "Found the following stale server IDs: " |
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print " " + "\n ".join( |
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[str(x) for x in stale]) |
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elif verbosity == 2: |
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print >> sys.stderr, "Found no stale server IDs in DB." |
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if options['detect_orphans']: |
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orphans = reconciliation.orphan_instances_in_ganeti(D, G) |
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if len(orphans) > 0: |
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print >> sys.stderr, "Found orphan Ganeti instances with IDs: " |
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print " " + "\n ".join( |
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[str(x) for x in orphans]) |
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elif verbosity == 2: |
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print >> sys.stderr, "Found no orphan Ganeti instances." |
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if options['detect_unsynced']: |
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unsynced = reconciliation.unsynced_operstate(D, G) |
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if len(unsynced) > 0: |
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print >> sys.stderr, "The operstate of the following server" \ |
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" IDs is out-of-sync:"
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print " " + "\n ".join( |
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["%d is %s in DB, %s in Ganeti" %
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(x[0], x[1], ('UP' if x[2] else 'DOWN')) |
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for x in unsynced]) |
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elif verbosity == 2: |
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print >> sys.stderr, "The operstate of all servers is in sync." |
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#
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# Then fix them
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#
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if options['fix_stale'] and len(stale) > 0: |
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print >> sys.stderr, \
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"Simulating successful Ganeti removal for %d " \
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"servers in the DB:" % len(stale) |
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for vm in VirtualMachine.objects.filter(pk__in=stale): |
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event_time = datetime.datetime.now() |
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backend.process_op_status(vm=vm, etime=event_time, jobid=-0,
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opcode='OP_INSTANCE_REMOVE', status='success', |
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logmsg='Reconciliation: simulated Ganeti event')
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print >> sys.stderr, " ...done" |
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if options['fix_orphans'] and len(orphans) > 0: |
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print >> sys.stderr, \
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"Issuing OP_INSTANCE_REMOVE for %d Ganeti instances:" % \
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len(orphans)
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for id in orphans: |
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rapi = GanetiRapiClient(*settings.GANETI_CLUSTER_INFO) |
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rapi.DeleteInstance('%s%s' %
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(settings.BACKEND_PREFIX_ID, str(id))) |
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print >> sys.stderr, " ...done" |
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if options['fix_unsynced'] and len(unsynced) > 0: |
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print >> sys.stderr, "Setting the state of %d out-of-sync VMs:" % \ |
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len(unsynced)
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for id, db_state, ganeti_up in unsynced: |
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vm = VirtualMachine.objects.get(pk=id)
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opcode = "OP_INSTANCE_REBOOT" if ganeti_up \ |
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else "OP_INSTANCE_SHUTDOWN" |
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event_time = datetime.datetime.now() |
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backend.process_op_status(vm=vm, etime=event_time ,jobid=-0,
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opcode=opcode, status='success',
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logmsg='Reconciliation: simulated Ganeti event')
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print >> sys.stderr, " ...done" |