Synnefo

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from optparse import make_option

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

from synnefo.db.models import VirtualMachine, Backend, Flavor

from synnefo.logic.backend import create_instance

from synnefo.logic.backend_allocator import BackendAllocator

from synnefo.api.util import get_image, allocate_public_address

from synnefo.api.faults import ItemNotFound

HELP_MSG = """

Create a new VM without authenticating the user or checking the resource

limits of the user. Also the allocator can be bypassed by specifing a

backend-id.

"""

class Command(BaseCommand):

    help = "Create a new VM." + HELP_MSG

    output_transaction = True

    option_list = BaseCommand.option_list + (

            make_option("--backend-id", dest="backend_id",

                        help="Unique identifier of the Ganeti backend."

                             " Use snf-manage backend-list to find out"

                             " available backends."),

            make_option("--name", dest="name",

                        help="An arbitrary string for naming the server"),

            make_option("--user-id", dest="user_id",

                        help="Unique identifier of the owner of the server"),

            make_option("--image-id", dest="image_id",

                        help="Unique identifier of the image."

                             " Use snf-manage image-list to find out"

                             " available images."),

            make_option("--flavor-id", dest="flavor_id",

                        help="Unique identifier of the flavor"

                             " Use snf-manage flavor-list to find out"

                             " available flavors."),

            make_option("--password", dest="password",

                        help="Password for the new server")

        )

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

        if args:

            raise CommandError("Command doesn't accept any arguments")

        name = options['name']

        user_id = options['user_id']

        backend_id = options['backend_id']

        image_id = options['image_id']

        flavor_id = options['flavor_id']

        password = options['password']

        if not name:

            raise CommandError("name is mandatory")

        if not user_id:

            raise CommandError("user-id is mandatory")

        if not password:

            raise CommandError("password is mandatory")

        # Get Flavor

        if flavor_id:

            try:

                flavor_id = int(flavor_id)

                flavor = Flavor.objects.get(id=flavor_id)

            except ValueError:

                raise CommandError("Invalid flavor-id")

            except Flavor.DoesNotExist:

                raise CommandError("Flavor not found")

        else:

            raise CommandError("flavor-id is mandatory")

        # Get Image

        if image_id:

            try:

                img = get_image(image_id, user_id)

            except ItemNotFound:

                raise CommandError("Image not found")

            properties = img.get('properties', {})

            image = {}

            image['backend_id'] = img['location']

            image['format'] = img['disk_format']

            image['metadata'] = dict((key.upper(), val) \

                                     for key, val in properties.items())

        else:

            raise CommandError("image-id is mandatory")

        # Get Backend

        if backend_id:

            try:

                backend_id = int(backend_id)

                backend = Backend.objects.get(id=backend_id)

            except (ValueError, Backend.DoesNotExist):

                raise CommandError("Invalid Backend ID")

        else:

            ballocator = BackendAllocator()

            backend = ballocator.allocate(user_id, flavor)

            if not backend:

                raise CommandError("Can not allocate VM")

        # Get Public address

        (network, address) = allocate_public_address(backend)

        if address is None:

            raise CommandError("Can not allocate a public address."\

                               " No available public network.")

        nic = {'ip': address, 'network': network.backend_id}

        # Create the VM in DB

        vm = VirtualMachine.objects.create(name=name,

                                           backend=backend,

                                           userid=user_id,

                                           imageid=image_id,

                                           flavor=flavor)

        # Create the instance in Backend

        jobID = create_instance(vm, nic, flavor, image, password, [])

        self.stdout.write("Creating VM %s with IP %s in Backend %s. JobID: %s\n" % \

                          (vm, address, backend, jobID))