planetstack/observer/steps/sync_network_deployments.py

   1 import os
   2 import base64
   3 from collections import defaultdict
   4 from netaddr import IPAddress, IPNetwork
   5 from django.db.models import F, Q
   6 from planetstack.config import Config
   7 from observer.openstacksyncstep import OpenStackSyncStep
   8 from core.models.network import *
   9 from core.models.slice import *
  10 from util.logger import Logger, logging
  11
  12 logger = Logger(level=logging.INFO)
  13
  14 class SyncNetworkDeployments(OpenStackSyncStep):
  15     requested_interval = 0
  16     provides=[NetworkDeployments]
  17
  18     def fetch_pending(self):
  19         # network deployments are not visible to users. We must ensure
  20         # networks are deployed at all deploymets available to their slices.
  21         slice_deployments = SliceDeployments.objects.all()
  22         slice_deploy_lookup = defaultdict(list)
  23         for slice_deployment in slice_deployments:
  24             slice_deploy_lookup[slice_deployment.slice].append(slice_deployment.deployment)
  25
  26         network_deployments = NetworkDeployments.objects.all()
  27         network_deploy_lookup = defaultdict(list)
  28         for network_deployment in network_deployments:
  29             network_deploy_lookup[network_deployment.network].append(network_deployment.deployment)
  30
  31         for network in Network.objects.filter():
  32             expected_deployments = slice_deploy_lookup[network.owner]
  33             for expected_deployment in expected_deployments:
  34                 if network not in network_deploy_lookup or \
  35                   expected_deployment not in network_deploy_lookup[network]:
  36                     nd = NetworkDeployments(network=network, deployment=expected_deployment)
  37                     nd.save()
  38         return NetworkDeployments.objects.filter(Q(enacted__lt=F('updated')) | Q(enacted=None))
  39
  40     def get_next_subnet(self, deployment=None):
  41         # limit ourself to 10.0.x.x for now
  42         valid_subnet = lambda net: net.startswith('10.0')
  43         driver = self.driver.admin_driver(deployment=deployment)
  44         subnets = driver.shell.quantum.list_subnets()['subnets']
  45         ints = [int(IPNetwork(subnet['cidr']).ip) for subnet in subnets \
  46                 if valid_subnet(subnet['cidr'])]
  47         ints.sort()
  48         if ints:
  49             last_ip = IPAddress(ints[-1])
  50         else:
  51             last_ip = IPAddress('10.0.0.0')
  52         last_network = IPNetwork(str(last_ip) + "/24")
  53         next_network = IPNetwork(str(IPAddress(last_network) + last_network.size) + "/24")
  54         return next_network
  55
  56     def save_network_deployment(self, network_deployment):
  57         if not network_deployment.network_id and network_deployment.network.template.sharedNetworkName:
  58             network_deployment.network_id = network_deployment.network.template.sharedNetworkId
  59
  60         if not network_deployment.net_id:
  61             network_name = network_deployment.network.name
  62
  63             # create network
  64             os_network = self.driver.create_network(network_name, shared=True)
  65             network_deployment.net_id = os_network['id']
  66
  67             # create router
  68             router = self.driver.create_router(network_name)
  69             network_deployment.router_id = router['id']
  70
  71             # create subnet
  72             next_subnet = self.get_next_subnet(deployment=network_deployment.deployment.name)
  73             cidr = str(next_subnet.cidr)
  74             ip_version = next_subnet.version
  75             start = str(next_subnet[2])
  76             end = str(next_subnet[-2])
  77             subnet = self.driver.create_subnet(name=network_name,
  78                                                network_id = network_deployment.net_id,
  79                                                cidr_ip = cidr,
  80                                                ip_version = ip_version,
  81                                                start = start,
  82                                                end = end)
  83             network_deployment.subnet = cidr
  84             network_deployment.subnet_id = subnet['id']
  85             # add subnet as interface to slice's router
  86             self.driver.add_router_interface(router['id'], subnet['id'])
  87             # add external route
  88             self.driver.add_external_route(subnet)
  89             logger.info("created private subnet (%s) for network: %s" % (cidr, network_deployment.network))
  90         else:
  91             (network_deployment.subnet_id, network_deployment.subnet) = self.driver.get_network_subnet(network_deployment.net_id)
  92             logger.info("sync'ed subnet (%s) for network: %s" % (network_deployment.subnet, network_deployment.network))
  93
  94         network_deployment.save()
  95
  96     def sync_record(self, network_deployment):
  97         if network_deployment.network.owner and network_deployment.network.owner.creator:
  98             try:
  99                 # update manager context
 100                 real_driver = self.driver
 101                 self.driver = self.driver.client_driver(caller=network_deployment.network.owner.creator,
 102                                                         tenant=network_deployment.network.owner.name,
 103                                                         deployment=network_deployment.deployment.name)
 104                 self.save_network_deployment(network_deployment)
 105                 self.driver = real_driver
 106                 logger.info("saved network deployment: %s" % (network_deployment))
 107             except Exception,e:
 108                 logger.log_exc("save network deployment failed: %s" % network_deployment)
 109                 raise e
 110
 111
 112