planetstack/openstack_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 core.models.sliver import Sliver
  11 from util.logger import Logger, logging
  12
  13 logger = Logger(level=logging.INFO)
  14
  15 class SyncNetworkDeployments(OpenStackSyncStep):
  16     requested_interval = 0
  17     provides=[Network, NetworkDeployments, Sliver]
  18
  19     def fetch_pending(self, deleted):
  20         if (deleted):
  21             return NetworkDeployments.deleted_objects.all()
  22         else:
  23             # network deployments are not visible to users. We must ensure
  24             # networks are deployed at all deploymets available to their slices.
  25             slice_deployments = SliceDeployments.objects.all()
  26             slice_deploy_lookup = defaultdict(list)
  27             for slice_deployment in slice_deployments:
  28                 slice_deploy_lookup[slice_deployment.slice].append(slice_deployment.deployment)
  29
  30             network_deployments = NetworkDeployments.objects.all()
  31             network_deploy_lookup = defaultdict(list)
  32             for network_deployment in network_deployments:
  33                 network_deploy_lookup[network_deployment.network].append(network_deployment.deployment)
  34
  35             for network in Network.objects.filter():
  36                 expected_deployments = slice_deploy_lookup[network.owner]
  37                 for expected_deployment in expected_deployments:
  38                     if network not in network_deploy_lookup or \
  39                       expected_deployment not in network_deploy_lookup[network]:
  40                         nd = NetworkDeployments(network=network, deployment=expected_deployment)
  41                         nd.save()
  42             return NetworkDeployments.objects.filter(Q(enacted__lt=F('updated')) | Q(enacted=None))
  43
  44     def get_next_subnet(self, deployment=None):
  45         # limit ourself to 10.0.x.x for now
  46         valid_subnet = lambda net: net.startswith('10.0')
  47         driver = self.driver.admin_driver(deployment=deployment)
  48         subnets = driver.shell.quantum.list_subnets()['subnets']
  49         ints = [int(IPNetwork(subnet['cidr']).ip) for subnet in subnets \
  50                 if valid_subnet(subnet['cidr'])]
  51         ints.sort()
  52         if ints:
  53             last_ip = IPAddress(ints[-1])
  54         else:
  55             last_ip = IPAddress('10.0.0.0')
  56         last_network = IPNetwork(str(last_ip) + "/24")
  57         next_network = IPNetwork(str(IPAddress(last_network) + last_network.size) + "/24")
  58         return next_network
  59
  60     def save_network_deployment(self, network_deployment):
  61         if (not network_deployment.net_id) and network_deployment.network.template.sharedNetworkName:
  62             # It's a shared network, try to find the shared network id
  63
  64             quantum_networks = self.driver.shell.quantum.list_networks(name=network_deployment.network.template.sharedNetworkName)["networks"]
  65             if quantum_networks:
  66                 logger.info("set shared network id %s" % quantum_networks[0]["id"])
  67                 network_deployment.net_id = quantum_networks[0]["id"]
  68             else:
  69                 logger.info("failed to find shared network id for deployment")
  70                 return
  71
  72         # At this point, it must be a private network, so create it if it does
  73         # not exist.
  74
  75         if not network_deployment.net_id:
  76             network_name = network_deployment.network.name
  77
  78             # create network
  79             os_network = self.driver.create_network(network_name, shared=True)
  80             network_deployment.net_id = os_network['id']
  81
  82             # create router
  83             #router = self.driver.create_router(network_name)
  84             #network_deployment.router_id = router['id']
  85
  86             # create subnet
  87             next_subnet = self.get_next_subnet(deployment=network_deployment.deployment.name)
  88             cidr = str(next_subnet.cidr)
  89             ip_version = next_subnet.version
  90             start = str(next_subnet[2])
  91             end = str(next_subnet[-2])
  92             subnet = self.driver.create_subnet(name=network_name,
  93                                                network_id = network_deployment.net_id,
  94                                                cidr_ip = cidr,
  95                                                ip_version = ip_version,
  96                                                start = start,
  97                                                end = end)
  98             network_deployment.subnet = cidr
  99             network_deployment.subnet_id = subnet['id']
 100             # add subnet as interface to slice's router
 101             #self.driver.add_router_interface(router['id'], subnet['id'])
 102             # add external route
 103             #self.driver.add_external_route(subnet)
 104             logger.info("created private subnet (%s) for network: %s" % (cidr, network_deployment.network))
 105
 106         # Now, figure out the subnet and subnet_id for the network. This works
 107         # for both private and shared networks.
 108
 109         if (not network_deployment.subnet_id) or (not network_deployment.subnet):
 110             (network_deployment.subnet_id, network_deployment.subnet) = self.driver.get_network_subnet(network_deployment.net_id)
 111             logger.info("sync'ed subnet (%s) for network: %s" % (network_deployment.subnet, network_deployment.network))
 112
 113         if (not network_deployment.subnet):
 114             # this will generate a non-null database constraint error
 115             #   ... which in turn leads to transaction errors
 116             # it's probably caused by networks that no longer exist at the
 117             # quantum level.
 118
 119             logger.info("null subnet for network %s, skipping save" % network_deployment.network)
 120             return
 121
 122         network_deployment.save()
 123
 124     def sync_record(self, network_deployment):
 125         if network_deployment.network.owner and network_deployment.network.owner.creator:
 126             try:
 127                 # update manager context
 128                 real_driver = self.driver
 129                 self.driver = self.driver.client_driver(caller=network_deployment.network.owner.creator,
 130                                                         tenant=network_deployment.network.owner.name,
 131                                                         deployment=network_deployment.deployment.name)
 132                 self.save_network_deployment(network_deployment)
 133                 self.driver = real_driver
 134                 logger.info("saved network deployment: %s" % (network_deployment))
 135             except Exception,e:
 136                 logger.log_exc("save network deployment failed: %s" % network_deployment)
 137                 raise e
 138
 139
 140     def delete_record(self, network_deployment):
 141         driver = OpenStackDriver().client_driver(caller=network_deployment.network.owner.creator,
 142                                                  tenant=network_deployment.network.owner.name,
 143                                                  deployment=network_deployment.deployment.name)
 144         if (network_deployment.router_id) and (network_deployment.subnet_id):
 145             driver.delete_router_interface(network_deployment.router_id, network_deployment.subnet_id)
 146         if network_deployment.subnet_id:
 147             driver.delete_subnet(network_deployment.subnet_id)
 148         if network_deployment.router_id:
 149             driver.delete_router(network_deployment.router_id)
 150         if network_deployment.net_id:
 151             driver.delete_network(network_deployment.net_id)