Synnefo

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from optparse import make_option

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

from synnefo.db.models import Backend

from synnefo.management.common import (get_network, get_backend)

from snf_django.management.utils import parse_bool

from synnefo.logic import networks, backend as backend_mod

from django.db import transaction

class Command(BaseCommand):

    args = "<network id>"

    help = "Modify a network."

    option_list = BaseCommand.option_list + (

        make_option(

            '--name',

            dest='name',

            metavar='NAME',

            help="Rename a network"),

        make_option(

            '--userid',

            dest='userid',

            help="Change the owner of the network."),

        make_option(

            "--drained",

            dest="drained",

            metavar="True|False",

            choices=["True", "False"],

            help="Set as drained to exclude for IP allocation."

                 " Only used for public networks."),

        make_option(

            "--floating-ip-pool",

            dest="floating_ip_pool",

            metavar="True|False",

            choices=["True", "False"],

            help="Convert network to a floating IP pool. During this"

                 " conversation the network will be created to all"

                 " available Ganeti backends."),

        make_option(

            '--add-reserved-ips',

            dest="add_reserved_ips",

            help="Comma seperated list of IPs to externally reserve."),

        make_option(

            '--remove-reserved-ips',

            dest="remove_reserved_ips",

            help="Comma seperated list of IPs to externally release."),

        make_option(

            "--add-to-backend",

            dest="add_to_backend",

            metavar="BACKEND_ID",

            help="Create a network to a Ganeti backend."),

        make_option(

            "--remove-from-backend",

            dest="remove_from_backend",

            metavar="BACKEND_ID",

            help="Remove a network from a Ganeti backend."),

    )

    @transaction.commit_on_success

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

        if len(args) != 1:

            raise CommandError("Please provide a network ID")

        network = get_network(args[0])

        new_name = options.get("name")

        if new_name is not None:

            old_name = network.name

            network = networks.rename(network, new_name)

            self.stdout.write("Renamed network '%s' from '%s' to '%s'.\n" %

                              (network, old_name, new_name))

        drained = options.get("drained")

        if drained is not None:

            drained = parse_bool(drained)

            network.drained = drained

            network.save()

            self.stdout.write("Set network '%s' as drained=%s.\n" %

                              (network, drained))

        new_owner = options.get("userid")

        if new_owner is not None:

            if "@" in new_owner:

                raise CommandError("Invalid owner UUID.")

            old_owner = network.userid

            network.userid = new_owner

            network.save()

            msg = "Changed the owner of network '%s' from '%s' to '%s'.\n"

            self.stdout.write(msg % (network, old_owner, new_owner))

        floating_ip_pool = options["floating_ip_pool"]

        if floating_ip_pool is not None:

            floating_ip_pool = parse_bool(floating_ip_pool)

            if floating_ip_pool is False and network.floating_ip_pool is True:

                if network.ips.filter(deleted=False, floating_ip=True)\

                              .exists():

                    msg = ("Cannot make network a non floating IP pool."

                           " There are still reserved floating IPs.")

                    raise CommandError(msg)

            network.floating_ip_pool = floating_ip_pool

            network.save()

            self.stdout.write("Set network '%s' as floating-ip-pool=%s.\n" %

                              (network, floating_ip_pool))

            if floating_ip_pool is True:

                for backend in Backend.objects.filter(offline=False):

                    bnet, jobs =\

                        backend_mod.ensure_network_is_active(backend,

                                                             network.id)

                    if jobs:

                        msg = ("Sent job to create network '%s' in backend"

                               " '%s'\n" % (network, backend))

                        self.stdout.write(msg)

        add_reserved_ips = options.get('add_reserved_ips')

        remove_reserved_ips = options.get('remove_reserved_ips')

        if add_reserved_ips or remove_reserved_ips:

            if add_reserved_ips:

                add_reserved_ips = add_reserved_ips.split(",")

                for ip in add_reserved_ips:

                    network.reserve_address(ip, external=True)

            if remove_reserved_ips:

                remove_reserved_ips = remove_reserved_ips.split(",")

                for ip in remove_reserved_ips:

                    network.release_address(ip, external=True)

        add_to_backend = options["add_to_backend"]

        if add_to_backend is not None:

            backend = get_backend(add_to_backend)

            bnet, jobs = backend_mod.ensure_network_is_active(backend,

                                                              network.id)

            if jobs:

                msg = "Sent job to create network '%s' in backend '%s'\n"

                self.stdout.write(msg % (network, backend))

        remove_from_backend = options["remove_from_backend"]

        if remove_from_backend is not None:

            backend = get_backend(remove_from_backend)

            if network.nics.filter(machine__backend=backend,

                                   machine__deleted=False).exists():

                msg = "Cannot remove. There are still connected VMs to this"\

                      " network"

                raise CommandError(msg)

            backend_mod.delete_network(network, backend, disconnect=True)

            msg = "Sent job to delete network '%s' from backend '%s'\n"

            self.stdout.write(msg % (network, backend))