Synnefo

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from optparse import make_option

from snf_django.management.commands import ListCommand

from synnefo.db.models import VirtualMachine

from synnefo.management.common import get_backend

from synnefo.api.util import get_image

from synnefo.settings import (CYCLADES_SERVICE_TOKEN as ASTAKOS_TOKEN,

                              ASTAKOS_BASE_URL)

from logging import getLogger

log = getLogger(__name__)

class Command(ListCommand):

    help = "List servers"

    option_list = ListCommand.option_list + (

        make_option(

            '--suspended',

            action='store_true',

            dest='suspended',

            default=False,

            help="List only suspended servers"),

        make_option(

            '--backend-id',

            dest='backend_id',

            help="List only servers of the specified backend"),

        make_option(

            "--build",

            action="store_true",

            dest="build",

            default=False,

            help="List only servers in the building state"),

        make_option(

            "--image-name",

            action="store_true",

            dest="image_name",

            default=False,

            help="Display image name instead of image ID"),

    )

    object_class = VirtualMachine

    deleted_field = "deleted"

    user_uuid_field = "userid"

    astakos_url = ASTAKOS_BASE_URL

    astakos_token = ASTAKOS_TOKEN

    def get_public_ip(vm):

        try:

            return vm.nics.all()[0].ipv4

        except IndexError:

            return None

    def format_vm_state(vm):

        if vm.operstate == "BUILD":

            return "BUILD(" + str(vm.buildpercentage) + "%)"

        else:

            return vm.operstate

    FIELDS = {

        "id": ("id", "ID of the server"),

        "name": ("name", "Name of the server"),

        "user.uuid": ("userid", "The UUID of the server's owner"),

        "flavor": ("flavor.name", "The name of the server's flavor"),

        "backend": ("backend", "The Ganeti backend that hosts the VM"),

        "image.id": ("imageid", "The ID of the server's image"),

        "image.name": ("image", "The name of the server's image"),

        "state": (format_vm_state, "The current state of the server"),

        "ip": (get_public_ip, "The public IP of the server"),

        "created": ("created", "The date the server was created"),

        "deleted": ("deleted", "Whether the server is deleted or not"),

        "suspended": ("suspended", "Whether the server is administratively"

                      " suspended"),

    }

    fields = ["id", "name", "user.uuid", "state", "flavor", "image.id",

              "backend"]

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

        if options["suspended"]:

            self.filters["suspended"] = True

        if options["backend_id"]:

            backend = get_backend(options["backend_id"])

            self.filters["backend"] = backend.id

        if options["build"]:

            self.filters["operstate"] = "BUILD"

        if options["image_name"]:

            self.fields = ["image.name" if x == "image.id" else x

                           for x in self.fields]

    def handle_db_objects(self, rows, *args, **kwargs):

        icache = ImageCache()

        for vm in rows:

            vm.image = icache.get_image(vm.imageid, vm.userid)

class ImageCache(object):

    def __init__(self):

        self.images = {}

    def get_image(self, imageid, userid):

        if not imageid in self.images:

            try:

                self.images[imageid] = get_image(imageid, userid)['name']

            except Exception as e:

                log.warning("Error getting image name from imageid %s: %s",

                            imageid, e)

                self.images[imageid] = imageid

        return self.images[imageid]