+
+ # 3. Configure the chaining of the network functions (currently only E-Line links supported)
+ vnf_id2vnf_name = defaultdict(lambda: "NotExistingNode",
+ reduce(lambda x, y: dict(x, **y),
+ map(lambda d: {d["vnf_id"]: d["vnf_name"]},
+ self.nsd["network_functions"])))
+
+ vlinks = self.nsd["virtual_links"]
+ fwd_links = self.nsd["forwarding_graphs"][0]["constituent_virtual_links"]
+ eline_fwd_links = [l for l in vlinks if (l["id"] in fwd_links) and (l["connectivity_type"] == "E-Line")]
+
+ # cookie is used as identifier for the flowrules installed by the dummygatekeeper
+ # eg. different services get a unique cookie for their flowrules
+ cookie = 1
+ for link in eline_fwd_links:
+ src_id, src_if_name = link["connection_points_reference"][0].split(":")
+ dst_id, dst_if_name = link["connection_points_reference"][1].split(":")
+
+ src_name = vnf_id2vnf_name[src_id]
+ dst_name = vnf_id2vnf_name[dst_id]
+
+ LOG.debug(
+ "Setting up E-Line link. %s(%s:%s) -> %s(%s:%s)" % (
+ src_name, src_id, src_if_name, dst_name, dst_id, dst_if_name))
+
+ if (src_name in self.vnfds) and (dst_name in self.vnfds):
+ network = self.vnfds[src_name].get("dc").net # there should be a cleaner way to find the DCNetwork
+ src_docker_name = self.vnf_name2docker_name[src_name]
+ dst_docker_name = self.vnf_name2docker_name[dst_name]
+ LOG.debug(src_docker_name)
+ ret = network.setChain(
+ src_docker_name, dst_docker_name,
+ vnf_src_interface=src_if_name, vnf_dst_interface=dst_if_name,
+ bidirectional=True, cmd="add-flow", cookie=cookie)
+
+ # re-configure the VNFs IP assignment and ensure that a new subnet is used for each E-Link
+ src_vnfi = self._get_vnf_instance(instance_uuid, src_name)
+ if src_vnfi is not None:
+ self._vnf_reconfigure_network(src_vnfi, src_if_name, self.eline_subnets_src.pop(0))
+ dst_vnfi = self._get_vnf_instance(instance_uuid, dst_name)
+ if dst_vnfi is not None:
+ self._vnf_reconfigure_network(dst_vnfi, dst_if_name, self.eline_subnets_dst.pop(0))
+
+ # 4. run the emulator specific entrypoint scripts in the VNFIs of this service instance
+ self._trigger_emulator_start_scripts_in_vnfis(self.instances[instance_uuid]["vnf_instances"])
+