X-Git-Url: https://osm.etsi.org/gitweb/?a=blobdiff_plain;f=src%2Femuvim%2Fapi%2Fsonata%2Fdummygatekeeper.py;h=bea0a010be8696fb70549e1d7332f86f9d6413c9;hb=ca88566fc038a5a59c8ca3d3af82aab8db7d253a;hp=0875adf638007c8c6c726fc47a3204b040659120;hpb=ee2f7e896f66d1fcb1729b2b83221c2e401bf879;p=osm%2Fvim-emu.git diff --git a/src/emuvim/api/sonata/dummygatekeeper.py b/src/emuvim/api/sonata/dummygatekeeper.py old mode 100644 new mode 100755 index 0875adf..bea0a01 --- a/src/emuvim/api/sonata/dummygatekeeper.py +++ b/src/emuvim/api/sonata/dummygatekeeper.py @@ -1,4 +1,31 @@ """ +Copyright (c) 2015 SONATA-NFV and Paderborn University +ALL RIGHTS RESERVED. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. + +Neither the name of the SONATA-NFV [, ANY ADDITIONAL AFFILIATION] +nor the names of its contributors may be used to endorse or promote +products derived from this software without specific prior written +permission. + +This work has been performed in the framework of the SONATA project, +funded by the European Commission under Grant number 671517 through +the Horizon 2020 and 5G-PPP programmes. The authors would like to +acknowledge the contributions of their colleagues of the SONATA +partner consortium (www.sonata-nfv.eu). +""" +""" This module implements a simple REST API that behaves like SONATA's gatekeeper. It is only used to support the development of SONATA's SDK tools and to demonstrate @@ -14,6 +41,7 @@ import yaml from docker import Client as DockerClient from flask import Flask, request import flask_restful as fr +from collections import defaultdict logging.basicConfig() LOG = logging.getLogger("sonata-dummy-gatekeeper") @@ -31,8 +59,7 @@ BUILD_DOCKERFILE = False GK_STANDALONE_MODE = False # should a new version of an image be pulled even if its available -FORCE_PULL = True - +FORCE_PULL = False class Gatekeeper(object): @@ -78,6 +105,10 @@ class Service(object): self.local_docker_files = dict() self.remote_docker_image_urls = dict() self.instances = dict() + self.vnf_name2docker_name = dict() + # lets generate a set of subnet configurations used for e-line chaining setup + self.eline_subnets_src = generate_subnet_strings(50, start=200, subnet_size=24, ip=1) + self.eline_subnets_dst = generate_subnet_strings(50, start=200, subnet_size=24, ip=2) def onboard(self): """ @@ -108,11 +139,13 @@ class Service(object): :return: """ LOG.info("Starting service %r" % self.uuid) + # 1. each service instance gets a new uuid to identify it instance_uuid = str(uuid.uuid4()) # build a instances dict (a bit like a NSR :)) self.instances[instance_uuid] = dict() self.instances[instance_uuid]["vnf_instances"] = list() + # 2. compute placement of this service instance (adds DC names to VNFDs) if not GK_STANDALONE_MODE: self._calculate_placement(FirstDcPlacement) @@ -122,6 +155,51 @@ class Service(object): if not GK_STANDALONE_MODE: vnfi = self._start_vnfd(vnfd) self.instances[instance_uuid]["vnf_instances"].append(vnfi) + + # 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 = 1 # not clear why this is needed - to check with Steven + 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) + cookie += 1 + + # 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"]) + LOG.info("Service started. Instance id: %r" % instance_uuid) return instance_uuid @@ -146,10 +224,68 @@ class Service(object): raise Exception("Docker image %r not found. Abort." % docker_name) # 3. do the dc.startCompute(name="foobar") call to run the container # TODO consider flavors, and other annotations - vnfi = target_dc.startCompute(GK.get_next_vnf_name(), image=docker_name, flavor_name="small") - # 6. store references to the compute objects in self.instances + intfs = vnfd.get("connection_points") + # mgmt connection points can be skipped, this is considered to be the connection the default docker0 bridge + intfs = [intf for intf in intfs if 'mgmt' not in intf['id']] + + # use the vnf_id in the nsd as docker name + # so deployed containers can be easily mapped back to the nsd + vnf_name2id = defaultdict(lambda: "NotExistingNode", + reduce(lambda x, y: dict(x, **y), + map(lambda d: {d["vnf_name"]: d["vnf_id"]}, + self.nsd["network_functions"]))) + self.vnf_name2docker_name[vnf_name] = vnf_name2id[vnf_name] + # self.vnf_name2docker_name[vnf_name] = GK.get_next_vnf_name() + + LOG.info("Starting %r as %r in DC %r" % (vnf_name, self.vnf_name2docker_name[vnf_name], vnfd.get("dc"))) + LOG.debug("Interfaces for %r: %r" % (vnf_name, intfs)) + vnfi = target_dc.startCompute(self.vnf_name2docker_name[vnf_name], network=intfs, image=docker_name, flavor_name="small") return vnfi + def _get_vnf_instance(self, instance_uuid, name): + """ + Returns the Docker object for the given VNF name (or Docker name). + :param instance_uuid: UUID of the service instance to search in. + :param name: VNF name or Docker name. We are fuzzy here. + :return: + """ + dn = name + if name in self.vnf_name2docker_name: + dn = self.vnf_name2docker_name[name] + for vnfi in self.instances[instance_uuid]["vnf_instances"]: + if vnfi.name == dn: + return vnfi + LOG.warning("No container with name: %r found.") + return None + + @staticmethod + def _vnf_reconfigure_network(vnfi, if_name, net_str): + """ + Reconfigure the network configuration of a specific interface + of a running container. + :param vnfi: container instacne + :param if_name: interface name + :param net_str: network configuration string, e.g., 1.2.3.4/24 + :return: + """ + intf = vnfi.intf(intf=if_name) + if intf is not None: + intf.setIP(net_str) + LOG.debug("Reconfigured network of %s:%s to %r" % (vnfi.name, if_name, net_str)) + else: + LOG.warning("Interface not found: %s:%s. Network reconfiguration skipped." % (vnfi.name, if_name)) + + + def _trigger_emulator_start_scripts_in_vnfis(self, vnfi_list): + for vnfi in vnfi_list: + config = vnfi.dcinfo.get("Config", dict()) + env = config.get("Env", list()) + for env_var in env: + if "SON_EMU_CMD=" in env_var: + cmd = str(env_var.split("=")[1]) + LOG.info("Executing entrypoint script in %r: %r" % (vnfi.name, cmd)) + vnfi.cmdPrint(cmd) + def _unpack_service_package(self): """ unzip *.son file and store contents in CATALOG_FOLDER/services// @@ -337,6 +473,7 @@ class Packages(fr.Resource): Return a list of UUID's of uploaded service packages. :return: dict/list """ + LOG.info("GET /packages") return {"service_uuid_list": list(GK.services.iterkeys())} @@ -368,7 +505,8 @@ class Instantiations(fr.Resource): Returns a list of UUIDs containing all running services. :return: dict / list """ - return {"service_instance_list": [ + LOG.info("GET /instantiations") + return {"service_instantiations_list": [ list(s.instances.iterkeys()) for s in GK.services.itervalues()]} @@ -416,6 +554,16 @@ def make_relative_path(path): return path +def generate_subnet_strings(n, start=1, subnet_size=24, ip=0): + """ + Helper to generate different network configuration strings. + """ + r = list() + for i in range(start, start + n): + r.append("%d.0.0.%d/%d" % (i, ip, subnet_size)) + return r + + if __name__ == '__main__': """ Lets allow to run the API in standalone mode.