planetstack/core/xoslib/objects/sliceplus.py

   1 from core.models import Slice, SlicePrivilege, Sliver, Site, Node
   2 from plus import PlusObjectMixin
   3 from operator import itemgetter, attrgetter
   4
   5 class SlicePlus(Slice, PlusObjectMixin):
   6     class Meta:
   7         proxy = True
   8
   9     def __init__(self, *args, **kwargs):
  10         super(SlicePlus, self).__init__(*args, **kwargs)
  11         self._update_site_allocation = None
  12         self._update_users = None
  13
  14     def getSliceInfo(self, user=None):
  15         used_sites = {}
  16         used_deployments = {}
  17         sliverCount = 0
  18         for sliver in self.slivers.all():
  19             site = sliver.node.site_deployment.site
  20             deployment = sliver.node.site_deployment.deployment
  21             used_sites[site.name] = used_sites.get(site.name, 0) + 1
  22             used_deployments[deployment.name] = used_deployments.get(deployment.name, 0) + 1
  23             sliverCount = sliverCount + 1
  24
  25         roles = []
  26         if (user!=None):
  27             roles = [x.role.role for x in self.sliceprivileges.filter(user=user)]
  28
  29         return {"sitesUsed": used_sites,
  30                 "deploymentsUsed": used_deployments,
  31                 "sliverCount": sliverCount,
  32                 "siteCount": len(used_sites.keys()),
  33                 "roles": roles}
  34
  35     @property
  36     def site_allocation(self):
  37         return self.getSliceInfo()["sitesUsed"]
  38
  39     @site_allocation.setter
  40     def site_allocation(self, value):
  41         self._update_site_allocation = value
  42         #print "XXX set sitesUsed to", value
  43
  44     @property
  45     def users(self):
  46         user_ids = []
  47         for priv in SlicePrivilege.objects.filter(slice=self):
  48             if not (priv.user.id in user_ids):
  49                 user_ids.append(priv.user.id)
  50         return user_ids
  51
  52     @users.setter
  53     def users(self, value):
  54         self._update_users = value
  55         #print "XXX set users to", value
  56
  57     @property
  58     def network_ports(self):
  59         # XXX this assumes there is only one network that can have ports bound
  60         # to it for a given slice. This is intended for the tenant view, which
  61         # will obey this field.
  62         networkPorts = ""
  63         for networkSlice in self.networkslices.all():
  64             network = networkSlice.network
  65             if network.ports:
  66                 networkPorts = network.ports
  67
  68         return networkPorts
  69
  70     @network_ports.setter
  71     def network_ports(self, value):
  72         print "XXX set networkPorts to", value
  73
  74     @staticmethod
  75     def select_by_user(user):
  76         if user.is_admin:
  77             qs = SlicePlus.objects.all()
  78         else:
  79             slice_ids = [sp.slice.id for sp in SlicePrivilege.objects.filter(user=user)]
  80             qs = SlicePlus.objects.filter(id__in=slice_ids)
  81         return qs
  82
  83     def get_site_node_allocation(self, siteList):
  84         siteIDList = [site.id for site in siteList]
  85         nodeList = []
  86         for node in Node.objects.all():
  87             if (node.site_deployment.site.id in siteIDList):
  88                 node.sliverCount = 0
  89                 for sliver in node.slivers.all():
  90                      if sliver.slice.id == self.id:
  91                          node.sliverCount = node.sliverCount + 1
  92                 nodeList.append(node)
  93         return nodeList
  94
  95     def save(self, *args, **kwargs):
  96         super(SlicePlus, self).save(*args, **kwargs)
  97
  98         if self._update_site_allocation:
  99             self.save_site_allocation(noAct=True)
 100             self.save_site_allocation()
 101
 102     def save_site_allocation(self, noAct = False):
 103         new_site_allocation = self._update_site_allocation
 104
 105         all_slice_slivers = self.slivers.all() # Sliver.objects.filter(slice=self)
 106         for site_name in new_site_allocation.keys():
 107             desired_allocation = new_site_allocation[site_name]
 108
 109             # make a list of the slivers for this site
 110             slivers = []
 111             for sliver in all_slice_slivers:
 112                 if sliver.node.site_deployment.site.name == site_name:
 113                     slivers.append(sliver)
 114
 115             # delete extra slivers
 116             while (len(slivers) > desired_allocation):
 117                 sliver = slivers.pop()
 118                 print "deleting sliver", sliver
 119                 if (not noAct):
 120                     sliver.delete()
 121
 122             # add more slivers
 123             if (len(slivers) < desired_allocation):
 124                 site = Site.objects.get(name = site_name)
 125                 nodes = self.get_site_node_allocation([site])
 126
 127                 if (not nodes):
 128                     raise ValueError("no nodes in site %s" % site_name)
 129
 130                 while (len(slivers) < desired_allocation):
 131                     # pick the least allocated node
 132                     nodes = sorted(nodes, key=attrgetter("sliverCount"))
 133                     node = nodes[0]
 134
 135                     sliver = Sliver(name=node.name,
 136                             slice=self,
 137                             node=node,
 138                             image = self.default_image,
 139                             flavor = self.default_flavor,
 140                             creator = self.creator,
 141                             deployment = node.site_deployment.deployment)
 142                     slivers.append(sliver)
 143                     if (not noAct):
 144                         sliver.save()
 145
 146                     print "added sliver", sliver
 147
 148                     node.sliverCount = node.sliverCount + 1
 149
 150