Synnefo

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from optparse import make_option

from django.db import transaction

from django.core.management.base import BaseCommand, CommandError

from synnefo.management.common import get_floating_ip_by_address

from synnefo import quotas

class Command(BaseCommand):

    can_import_settings = True

    output_transaction = True

    help = "Release a floating IP"

    @transaction.commit_on_success

    def handle(self, *args, **options):

        if not args:

            raise CommandError("Please provide a floating-ip address")

        address = args[0]

        floating_ip = get_floating_ip_by_address(address, for_update=True)

        if floating_ip.nic:

            # This is safe, you also need for_update to attach floating IP to

            # instance.

            msg = "Floating IP '%s' is attached to instance." % floating_ip.id

            raise CommandError(msg)

        # Return the address of the floating IP back to pool

        floating_ip.release_address()

        # And mark the floating IP as deleted

        floating_ip.deleted = True

        floating_ip.save()

        # Release quota for floating IP

        quotas.issue_and_accept_commission(floating_ip, delete=True)

        transaction.commit()

        # Delete the floating IP from DB

        floating_ip.delete()

        self.stdout.write("Deleted floating IP '%s'.\n" % address)