Synnefo

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from django.db.models import Sum, Count, Q

from synnefo.db.models import VirtualMachine, Network, IPAddress, Volume

from synnefo.quotas import Quotaholder

def get_db_holdings(user=None):

    """Get holdings from Cyclades DB."""

    holdings = {}

    vms = VirtualMachine.objects.filter(deleted=False)

    networks = Network.objects.filter(deleted=False)

    floating_ips = IPAddress.objects.filter(deleted=False, floating_ip=True)

    volumes = Volume.objects.filter(deleted=False)

    if user is not None:

        vms = vms.filter(userid=user)

        networks = networks.filter(userid=user)

        floating_ips = floating_ips.filter(userid=user)

    # Get resources related with VMs

    vm_resources = vms.values("userid")\

                      .annotate(num=Count("id"),

                                total_ram=Sum("flavor__ram"),

                                total_cpu=Sum("flavor__cpu"))

    vm_active_resources = \

        vms.values("userid")\

           .filter(Q(operstate="STARTED") | Q(operstate="BUILD") |

                   Q(operstate="ERROR"))\

           .annotate(ram=Sum("flavor__ram"),

                     cpu=Sum("flavor__cpu"))

    for vm_res in vm_resources.iterator():

        user = vm_res['userid']

        res = {"cyclades.vm": vm_res["num"],

               "cyclades.total_cpu": vm_res["total_cpu"],

               "cyclades.total_ram": vm_res["total_ram"] << 20}

        holdings[user] = res

    for vm_res in vm_active_resources.iterator():

        user = vm_res['userid']

        holdings[user]["cyclades.cpu"] = vm_res["cpu"]

        holdings[user]["cyclades.ram"] = vm_res["ram"] << 20

    # Get disk resource

    disk_resources = volumes.values("userid").annotate(Sum("size"))

    for disk_res in disk_resources.iterator():

        user = disk_res["userid"]

        holdings.setdefault(user, {})

        holdings[user]["cyclades.disk"] = disk_res["size__sum"] << 30

    # Get resources related with networks

    net_resources = networks.values("userid")\

                            .annotate(num=Count("id"))

    for net_res in net_resources.iterator():

        user = net_res['userid']

        holdings.setdefault(user, {})

        holdings[user]["cyclades.network.private"] = net_res["num"]

    floating_ips_resources = floating_ips.values("userid")\

                                         .annotate(num=Count("id"))

    for floating_ip_res in floating_ips_resources.iterator():

        user = floating_ip_res["userid"]

        holdings.setdefault(user, {})

        holdings[user]["cyclades.floating_ip"] = floating_ip_res["num"]

    return holdings

def get_quotaholder_holdings(user=None):

    """Get quotas from Quotaholder for all Cyclades resources.

    Returns quotas for all users, unless a single user is specified.

    """

    qh = Quotaholder.get()

    return qh.service_get_quotas(user)

def get_qh_users_holdings(users=None):

    qh = Quotaholder.get()

    if users is None or len(users) != 1:

        req = None

    else:

        req = users[0]

    quotas = qh.service_get_quotas(req)

    if users is None:

        return quotas

    qs = {}

    for user in users:

        try:

            qs[user] = quotas[user]

        except KeyError:

            pass

    return qs

def transform_quotas(quotas):

    d = {}

    for resource, counters in quotas.iteritems():

        used = counters['usage']

        limit = counters['limit']

        pending = counters['pending']

        d[resource] = (used, limit, pending)

    return d