Synnefo

# Copyright 2012 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

#

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

from django.core.management import CommandError

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

from snf_django.lib.api import faults

from synnefo.api import util

from synnefo.logic.rapi import GanetiApiError, GanetiRapiClient

from synnefo.logic.utils import (id_from_instance_name,

                                 id_from_network_name)

import logging

log = logging.getLogger(__name__)

def format_vm_state(vm):

    if vm.operstate == "BUILD":

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

    else:

        return vm.operstate

def validate_network_info(options):

    subnet = options['subnet']

    gateway = options['gateway']

    subnet6 = options['subnet6']

    gateway6 = options['gateway6']

    try:

        util.validate_network_params(subnet, gateway)

    except (faults.BadRequest, faults.OverLimit) as e:

        raise CommandError(e)

    return subnet, gateway, subnet6, gateway6

def get_backend(backend_id):

    try:

        backend_id = int(backend_id)

        return Backend.objects.get(id=backend_id)

    except ValueError:

        raise CommandError("Invalid Backend ID: %s" % backend_id)

    except Backend.DoesNotExist:

        raise CommandError("Backend with ID %s not found in DB. "

                           " Use snf-manage backend-list to find"

                           " out available backend IDs." % backend_id)

def get_image(image_id, user_id):

    if image_id:

        try:

            return util.get_image_dict(image_id, user_id)

        except faults.ItemNotFound:

            raise CommandError("Image with ID %s not found."

                               " Use snf-manage image-list to find"

                               " out available image IDs." % image_id)

    else:

        raise CommandError("image-id is mandatory")

def get_vm(server_id):

    """Get a VirtualMachine object by its ID.

    @type server_id: int or string

    @param server_id: The server's DB id or the Ganeti name

    """

    try:

        server_id = int(server_id)

    except (ValueError, TypeError):

        try:

            server_id = id_from_instance_name(server_id)

        except VirtualMachine.InvalidBackendIdError:

            raise CommandError("Invalid server ID: %s" % server_id)

    try:

        return VirtualMachine.objects.get(id=server_id)

    except VirtualMachine.DoesNotExist:

        raise CommandError("Server with ID %s not found in DB."

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

                           " available server IDs." % server_id)

def get_network(network_id):

    """Get a Network object by its ID.

    @type network_id: int or string

    @param network_id: The networks DB id or the Ganeti name

    """

    try:

        network_id = int(network_id)

    except (ValueError, TypeError):

        try:

            network_id = id_from_network_name(network_id)

        except Network.InvalidBackendIdError:

            raise CommandError("Invalid network ID: %s" % network_id)

    try:

        return Network.objects.get(id=network_id)

    except Network.DoesNotExist:

        raise CommandError("Network with ID %s not found in DB."

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

                           " available network IDs." % network_id)

def get_flavor(flavor_id):

    try:

        flavor_id = int(flavor_id)

        return Flavor.objects.get(id=flavor_id)

    except ValueError:

        raise CommandError("Invalid flavor ID: %s", flavor_id)

    except Flavor.DoesNotExist:

        raise CommandError("Flavor with ID %s not found in DB."

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

                           " available flavor IDs." % flavor_id)

def check_backend_credentials(clustername, port, username, password):

    try:

        client = GanetiRapiClient(clustername, port, username, password)

        # This command will raise an exception if there is no

        # write-access

        client.ModifyCluster()

    except GanetiApiError as e:

        raise CommandError(e)

    info = client.GetInfo()

    info_name = info['name']

    if info_name != clustername:

        raise CommandError("Invalid clustername value. Please use the"

                           " Ganeti Cluster name: %s" % info_name)

class Omit(object):

    pass