Commit e5668c79 authored by Christos Stavrakakis's avatar Christos Stavrakakis
Browse files

Management command for removing backend

parent 5d92d9b1
# Copyright 2011-2012 GRNET S.A. All rights reserved.
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from django.core.management.base import BaseCommand, CommandError
from synnefo.db.models import Backend, VirtualMachine, BackendNetwork
class Command(BaseCommand):
can_import_settings = True
help = "Remove a backend from the Database. Backend should be set\n" \
"to drained before trying to remove it, in order to avoid the\n" \
"allocation of a new instances in this Backend.\n\n" \
"Removal of a backend will fail if the backend hosts any\n" \
"non-deleted instances."
output_transaction = True # The management command runs inside
# an SQL transaction
def handle(self, *args, **options):
if len(args) < 1:
raise CommandError("Please provide a backend ID")
try:
backend_id = int(args[0])
backend = Backend.objects.get(id=backend_id)
except ValueError:
raise CommandError("Invalid backend ID")
except Backend.DoesNotExist:
raise CommandError("Backend not found in DB")
self.stdout.write('Trying to remove backend: %s\n' % backend.clustername)
vms_in_backend = VirtualMachine.objects.filter(backend=backend,
deleted=False)
if vms_in_backend:
raise CommandError('Backend hosts non-deleted vms. Can not delete')
networks = BackendNetwork.objects.filter(backend=backend, deleted=False)
networks = [net.network.backend_id for net in networks]
backend.delete()
self.stdout.write('Successfully removed backend.\n')
if networks:
self.stdout.write('Left the following orphans networks in Ganeti:\n')
self.stdout.write(' ' + '\n * '.join(networks) + '\n')
self.stdout.write('Manually remove them.\n')
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