Synnefo

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from optparse import make_option

from snf_django.management.commands import SynnefoCommand, CommandError

from synnefo.management import common, pprint

from synnefo.logic import backend as backend_mod, reconciliation, utils

from synnefo.db.models import Volume

HELP_MSG = """Import an existing Ganeti disk to Cyclades

Create a Cyclades Volume from an existing Ganeti disk. This command is useful

to handle disks that have been created directly in the Ganeti backend (instead

of being created by Cyclades). The command will not create/delete/modify the

specified disk in the Ganeti backend. Instead, it will create a Volume in

Cyclades DB, and rename the Ganeti disk with the Volume name.

"""

class Command(SynnefoCommand):

    help = HELP_MSG

    option_list = SynnefoCommand.option_list + (

        make_option(

            "--name",

            dest="name",

            default=None,

            help="Display name of the volume."),

        make_option(

            "--description",

            dest="description",

            default=None,

            help="Display description of the volume."),

        make_option(

            "--server",

            dest="server_id",

            default=None,

            help="The ID of the server that the volume is currently attached"),

        make_option(

            "--disk",

            dest="disk_uuid",

            default=None,

            help="The UUID of the disk to be imported"),

    )

    @common.convert_api_faults

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

        if args:

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

        display_name = options.get("name", "")

        display_description = options.get("description", "")

        server_id = options.get("server_id")

        if server_id is None:

            raise CommandError("Please specify the server that the disk is"

                               " currently attached.")

        disk_uuid = options.get("disk_uuid")

        if disk_uuid is None:

            raise CommandError("Please specify the UUID of the Ganeti disk")

        vm = common.get_vm(server_id)

        instance_info = backend_mod.get_instance_info(vm)

        instance_disks = reconciliation.disks_from_instance(instance_info)

        try:

            disk = filter(lambda d: d["uuid"] == disk_uuid, instance_disks)[0]

        except IndexError:

            raise CommandError("Instance '%s' does not have a disk with"

                               " UUID '%s" % (vm.id, disk_uuid))

        # Check that the instance disk is not already a Cyclades Volume

        try:

            disk_id = utils.id_from_disk_name(disk["name"])

        except:

            pass

        else:

            raise CommandError("Disk '%s' of instance '%s' is already a"

                               " Cyclades Volume. Volume ID: %s"

                               % (disk_uuid, vm.id, disk_id))

        size = disk["size"] >> 10  # Convert to GB

        self.stdout.write("Import disk/%s of instance %s, size: %s GB\n"

                          % (disk["index"], vm.id, size))

        volume = Volume.objects.create(

            userid=vm.userid,

            size=size,

            machine_id=server_id,

            name=display_name,

            description=display_description,

            index=disk["index"])

        self.stdout.write("Created Volume '%s' in DB\n" % volume.id)

        pprint.pprint_volume(volume, stdout=self.stdout)

        self.stdout.write("\n")

        client = vm.get_client()

        jobId = client.ModifyInstance(

            instance=vm.backend_vm_id,

            disks=[("modify", disk["index"],

                    {"name": volume.backend_volume_uuid})])

        (status, error) = backend_mod.wait_for_job(client, jobId)

        vm.put_client(client)

        if status == "success":

            self.stdout.write("Successfully imported disk\n")

        else:

            self.stdout.write("Failed to imported disk:\n %s\n" % error)