2 Copyright (c) 2015 SONATA-NFV and Paderborn University
5 Licensed under the Apache License, Version 2.0 (the "License");
6 you may not use this file except in compliance with the License.
7 You may obtain a copy of the License at
9 http://www.apache.org/licenses/LICENSE-2.0
11 Unless required by applicable law or agreed to in writing, software
12 distributed under the License is distributed on an "AS IS" BASIS,
13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 See the License for the specific language governing permissions and
15 limitations under the License.
17 Neither the name of the SONATA-NFV [, ANY ADDITIONAL AFFILIATION]
18 nor the names of its contributors may be used to endorse or promote
19 products derived from this software without specific prior written
22 This work has been performed in the framework of the SONATA project,
23 funded by the European Commission under Grant number 671517 through
24 the Horizon 2020 and 5G-PPP programmes. The authors would like to
25 acknowledge the contributions of their colleagues of the SONATA
26 partner consortium (www.sonata-nfv.eu).
29 This module implements a simple REST API that behaves like SONATA's gatekeeper.
31 It is only used to support the development of SONATA's SDK tools and to demonstrate
32 the year 1 version of the emulator until the integration with WP4's orchestrator is done.
42 from docker
import Client
as DockerClient
43 from flask
import Flask
, request
44 import flask_restful
as fr
45 from collections
import defaultdict
49 LOG
= logging
.getLogger("sonata-dummy-gatekeeper")
50 LOG
.setLevel(logging
.DEBUG
)
51 logging
.getLogger("werkzeug").setLevel(logging
.WARNING
)
53 GK_STORAGE
= "/tmp/son-dummy-gk/"
54 UPLOAD_FOLDER
= os
.path
.join(GK_STORAGE
, "uploads/")
55 CATALOG_FOLDER
= os
.path
.join(GK_STORAGE
, "catalog/")
57 # Enable Dockerfile build functionality
58 BUILD_DOCKERFILE
= False
60 # flag to indicate that we run without the emulator (only the bare API for integration testing)
61 GK_STANDALONE_MODE
= False
63 # should a new version of an image be pulled even if its available
66 # Automatically deploy SAPs (endpoints) of the service as new containers
67 # Attention: This is not a configuration switch but a global variable! Don't change its default value.
70 # flag to indicate if we use bidirectional forwarding rules in the automatic chaining process
71 BIDIRECTIONAL_CHAIN
= False
73 class Gatekeeper(object):
76 self
.services
= dict()
78 self
.vnf_counter
= 0 # used to generate short names for VNFs (Mininet limitation)
79 LOG
.info("Create SONATA dummy gatekeeper.")
81 def register_service_package(self
, service_uuid
, service
):
83 register new service package
87 self
.services
[service_uuid
] = service
88 # lets perform all steps needed to onboard the service
91 def get_next_vnf_name(self
):
93 return "vnf%d" % self
.vnf_counter
96 class Service(object):
98 This class represents a NS uploaded as a *.son package to the
100 Can have multiple running instances of this service.
107 self
.uuid
= service_uuid
108 self
.package_file_hash
= package_file_hash
109 self
.package_file_path
= package_file_path
110 self
.package_content_path
= os
.path
.join(CATALOG_FOLDER
, "services/%s" % self
.uuid
)
114 self
.local_docker_files
= dict()
115 self
.remote_docker_image_urls
= dict()
116 self
.instances
= dict()
117 self
.vnf_name2docker_name
= dict()
118 self
.sap_identifiers
= set()
119 # lets generate a set of subnet configurations used for e-line chaining setup
120 self
.eline_subnets_src
= generate_subnet_strings(50, start
=200, subnet_size
=24, ip
=1)
121 self
.eline_subnets_dst
= generate_subnet_strings(50, start
=200, subnet_size
=24, ip
=2)
125 Do all steps to prepare this service to be instantiated
128 # 1. extract the contents of the package and store them in our catalog
129 self
._unpack
_service
_package
()
130 # 2. read in all descriptor files
131 self
._load
_package
_descriptor
()
136 # 3. prepare container images (e.g. download or build Dockerfile)
138 self
._load
_docker
_files
()
139 self
._build
_images
_from
_dockerfiles
()
141 self
._load
_docker
_urls
()
142 self
._pull
_predefined
_dockerimages
()
143 LOG
.info("On-boarded service: %r" % self
.manifest
.get("name"))
145 def start_service(self
):
147 This methods creates and starts a new service instance.
148 It computes placements, iterates over all VNFDs, and starts
149 each VNFD as a Docker container in the data center selected
150 by the placement algorithm.
153 LOG
.info("Starting service %r" % self
.uuid
)
155 # 1. each service instance gets a new uuid to identify it
156 instance_uuid
= str(uuid
.uuid4())
157 # build a instances dict (a bit like a NSR :))
158 self
.instances
[instance_uuid
] = dict()
159 self
.instances
[instance_uuid
]["vnf_instances"] = list()
161 # 2. Configure the chaining of the network functions (currently only E-Line and E-LAN links supported)
162 vnf_id2vnf_name
= defaultdict(lambda: "NotExistingNode",
163 reduce(lambda x
, y
: dict(x
, **y
),
164 map(lambda d
: {d
["vnf_id"]: d
["vnf_name"]},
165 self
.nsd
["network_functions"])))
167 # 3. compute placement of this service instance (adds DC names to VNFDs)
168 if not GK_STANDALONE_MODE
:
169 #self._calculate_placement(FirstDcPlacement)
170 self
._calculate
_placement
(RoundRobinDcPlacement
)
171 # iterate over all vnfds that we have to start
172 for vnfd
in self
.vnfds
.itervalues():
174 if not GK_STANDALONE_MODE
:
175 vnfi
= self
._start
_vnfd
(vnfd
)
176 self
.instances
[instance_uuid
]["vnf_instances"].append(vnfi
)
178 vlinks
= self
.nsd
["virtual_links"]
179 fwd_links
= self
.nsd
["forwarding_graphs"][0]["constituent_virtual_links"]
180 eline_fwd_links
= [l
for l
in vlinks
if (l
["id"] in fwd_links
) and (l
["connectivity_type"] == "E-Line")]
181 elan_fwd_links
= [l
for l
in vlinks
if (l
["id"] in fwd_links
) and (l
["connectivity_type"] == "E-LAN")]
183 # 4a. deploy E-Line links
184 # cookie is used as identifier for the flowrules installed by the dummygatekeeper
185 # eg. different services get a unique cookie for their flowrules
187 for link
in eline_fwd_links
:
188 src_id
, src_if_name
= link
["connection_points_reference"][0].split(":")
189 dst_id
, dst_if_name
= link
["connection_points_reference"][1].split(":")
191 # check if there is a SAP in the link
192 if src_id
in self
.sap_identifiers
:
193 src_docker_name
= "{0}_{1}".format(src_id
, src_if_name
)
194 src_id
= src_docker_name
196 src_docker_name
= src_id
198 if dst_id
in self
.sap_identifiers
:
199 dst_docker_name
= "{0}_{1}".format(dst_id
, dst_if_name
)
200 dst_id
= dst_docker_name
202 dst_docker_name
= dst_id
204 src_name
= vnf_id2vnf_name
[src_id
]
205 dst_name
= vnf_id2vnf_name
[dst_id
]
208 "Setting up E-Line link. %s(%s:%s) -> %s(%s:%s)" % (
209 src_name
, src_id
, src_if_name
, dst_name
, dst_id
, dst_if_name
))
211 if (src_name
in self
.vnfds
) and (dst_name
in self
.vnfds
):
212 network
= self
.vnfds
[src_name
].get("dc").net
# there should be a cleaner way to find the DCNetwork
213 LOG
.debug(src_docker_name
)
214 ret
= network
.setChain(
215 src_docker_name
, dst_docker_name
,
216 vnf_src_interface
=src_if_name
, vnf_dst_interface
=dst_if_name
,
217 bidirectional
=BIDIRECTIONAL_CHAIN
, cmd
="add-flow", cookie
=cookie
, priority
=10)
219 # re-configure the VNFs IP assignment and ensure that a new subnet is used for each E-Link
220 src_vnfi
= self
._get
_vnf
_instance
(instance_uuid
, src_name
)
221 if src_vnfi
is not None:
222 self
._vnf
_reconfigure
_network
(src_vnfi
, src_if_name
, self
.eline_subnets_src
.pop(0))
223 dst_vnfi
= self
._get
_vnf
_instance
(instance_uuid
, dst_name
)
224 if dst_vnfi
is not None:
225 self
._vnf
_reconfigure
_network
(dst_vnfi
, dst_if_name
, self
.eline_subnets_dst
.pop(0))
227 # 4b. deploy E-LAN links
229 for link
in elan_fwd_links
:
233 # generate lan ip address
235 for intf
in link
["connection_points_reference"]:
236 ip_address
= generate_lan_string("10.0", base
, subnet_size
=24, ip
=ip
)
237 vnf_id
, intf_name
= intf
.split(":")
238 if vnf_id
in self
.sap_identifiers
:
239 src_docker_name
= "{0}_{1}".format(vnf_id
, intf_name
)
240 vnf_id
= src_docker_name
242 src_docker_name
= vnf_id
243 vnf_name
= vnf_id2vnf_name
[vnf_id
]
245 "Setting up E-LAN link. %s(%s:%s) -> %s" % (
246 vnf_name
, vnf_id
, intf_name
, ip_address
))
248 if vnf_name
in self
.vnfds
:
249 # re-configure the VNFs IP assignment and ensure that a new subnet is used for each E-LAN
250 # E-LAN relies on the learning switch capability of Ryu which has to be turned on in the topology
251 # (DCNetwork(controller=RemoteController, enable_learning=True)), so no explicit chaining is necessary.
252 vnfi
= self
._get
_vnf
_instance
(instance_uuid
, vnf_name
)
254 self
._vnf
_reconfigure
_network
(vnfi
, intf_name
, ip_address
)
255 # increase for the next ip address on this E-LAN
258 # add this vnf and interface to the E-LAN for tagging
259 network
= self
.vnfds
[vnf_name
].get("dc").net
# there should be a cleaner way to find the DCNetwork
260 elan
.append({'name':src_docker_name
,'interface':intf_name
})
263 # install the VLAN tags for this E-LAN
266 # increase the base ip address for the next E-LAN
269 # 5. run the emulator specific entrypoint scripts in the VNFIs of this service instance
270 self
._trigger
_emulator
_start
_scripts
_in
_vnfis
(self
.instances
[instance_uuid
]["vnf_instances"])
272 LOG
.info("Service started. Instance id: %r" % instance_uuid
)
275 def _start_vnfd(self
, vnfd
):
277 Start a single VNFD of this service
278 :param vnfd: vnfd descriptor dict
281 # iterate over all deployment units within each VNFDs
282 for u
in vnfd
.get("virtual_deployment_units"):
283 # 1. get the name of the docker image to start and the assigned DC
284 vnf_name
= vnfd
.get("name")
285 if vnf_name
not in self
.remote_docker_image_urls
:
286 raise Exception("No image name for %r found. Abort." % vnf_name
)
287 docker_name
= self
.remote_docker_image_urls
.get(vnf_name
)
288 target_dc
= vnfd
.get("dc")
289 # 2. perform some checks to ensure we can start the container
290 assert(docker_name
is not None)
291 assert(target_dc
is not None)
292 if not self
._check
_docker
_image
_exists
(docker_name
):
293 raise Exception("Docker image %r not found. Abort." % docker_name
)
294 # 3. do the dc.startCompute(name="foobar") call to run the container
295 # TODO consider flavors, and other annotations
296 intfs
= vnfd
.get("connection_points")
298 # TODO: get all vnf id's from the nsd for this vnfd and use those as dockername
299 # use the vnf_id in the nsd as docker name
300 # so deployed containers can be easily mapped back to the nsd
301 vnf_name2id
= defaultdict(lambda: "NotExistingNode",
302 reduce(lambda x
, y
: dict(x
, **y
),
303 map(lambda d
: {d
["vnf_name"]: d
["vnf_id"]},
304 self
.nsd
["network_functions"])))
305 self
.vnf_name2docker_name
[vnf_name
] = vnf_name2id
[vnf_name
]
306 # self.vnf_name2docker_name[vnf_name] = GK.get_next_vnf_name()
308 LOG
.info("Starting %r as %r in DC %r" % (vnf_name
, self
.vnf_name2docker_name
[vnf_name
], vnfd
.get("dc")))
309 LOG
.debug("Interfaces for %r: %r" % (vnf_name
, intfs
))
310 vnfi
= target_dc
.startCompute(self
.vnf_name2docker_name
[vnf_name
], network
=intfs
, image
=docker_name
, flavor_name
="small")
313 def _get_vnf_instance(self
, instance_uuid
, name
):
315 Returns the Docker object for the given VNF name (or Docker name).
316 :param instance_uuid: UUID of the service instance to search in.
317 :param name: VNF name or Docker name. We are fuzzy here.
321 if name
in self
.vnf_name2docker_name
:
322 dn
= self
.vnf_name2docker_name
[name
]
323 for vnfi
in self
.instances
[instance_uuid
]["vnf_instances"]:
326 LOG
.warning("No container with name: %r found.")
330 def _vnf_reconfigure_network(vnfi
, if_name
, net_str
):
332 Reconfigure the network configuration of a specific interface
333 of a running container.
334 :param vnfi: container instacne
335 :param if_name: interface name
336 :param net_str: network configuration string, e.g., 1.2.3.4/24
339 intf
= vnfi
.intf(intf
=if_name
)
342 LOG
.debug("Reconfigured network of %s:%s to %r" % (vnfi
.name
, if_name
, net_str
))
344 LOG
.warning("Interface not found: %s:%s. Network reconfiguration skipped." % (vnfi
.name
, if_name
))
347 def _trigger_emulator_start_scripts_in_vnfis(self
, vnfi_list
):
348 for vnfi
in vnfi_list
:
349 config
= vnfi
.dcinfo
.get("Config", dict())
350 env
= config
.get("Env", list())
352 if "SON_EMU_CMD=" in env_var
:
353 cmd
= str(env_var
.split("=")[1])
354 LOG
.info("Executing entry point script in %r: %r" % (vnfi
.name
, cmd
))
355 # execute command in new thread to ensure that GK is not blocked by VNF
356 t
= threading
.Thread(target
=vnfi
.cmdPrint
, args
=(cmd
,))
360 def _unpack_service_package(self
):
362 unzip *.son file and store contents in CATALOG_FOLDER/services/<service_uuid>/
364 LOG
.info("Unzipping: %r" % self
.package_file_path
)
365 with zipfile
.ZipFile(self
.package_file_path
, "r") as z
:
366 z
.extractall(self
.package_content_path
)
369 def _load_package_descriptor(self
):
371 Load the main package descriptor YAML and keep it as dict.
374 self
.manifest
= load_yaml(
376 self
.package_content_path
, "META-INF/MANIFEST.MF"))
380 Load the entry NSD YAML and keep it as dict.
383 if "entry_service_template" in self
.manifest
:
384 nsd_path
= os
.path
.join(
385 self
.package_content_path
,
386 make_relative_path(self
.manifest
.get("entry_service_template")))
387 self
.nsd
= load_yaml(nsd_path
)
388 LOG
.debug("Loaded NSD: %r" % self
.nsd
.get("name"))
390 def _load_vnfd(self
):
392 Load all VNFD YAML files referenced in MANIFEST.MF and keep them in dict.
395 if "package_content" in self
.manifest
:
396 for pc
in self
.manifest
.get("package_content"):
397 if pc
.get("content-type") == "application/sonata.function_descriptor":
398 vnfd_path
= os
.path
.join(
399 self
.package_content_path
,
400 make_relative_path(pc
.get("name")))
401 vnfd
= load_yaml(vnfd_path
)
402 self
.vnfds
[vnfd
.get("name")] = vnfd
403 LOG
.debug("Loaded VNFD: %r" % vnfd
.get("name"))
405 def _load_saps(self
):
406 # Each Service Access Point (connection_point) in the nsd is getting its own container
407 SAPs
= [p
["id"] for p
in self
.nsd
["connection_points"] if p
["type"] == "interface"]
409 # endpoints needed in this service
410 sap_vnf_id
, sap_vnf_interface
= sap
.split(':')
411 # set of the connection_point ids found in the nsd (in the examples this is 'ns')
412 self
.sap_identifiers
.add(sap_vnf_id
)
414 sap_docker_name
= "%s_%s" % (sap_vnf_id
, sap_vnf_interface
)
416 # add SAP to self.vnfds
417 sapfile
= pkg_resources
.resource_filename(__name__
, "sap_vnfd.yml")
418 sap_vnfd
= load_yaml(sapfile
)
419 sap_vnfd
["connection_points"][0]["id"] = sap_vnf_interface
420 sap_vnfd
["name"] = sap_docker_name
421 self
.vnfds
[sap_docker_name
] = sap_vnfd
422 # add SAP vnf to list in the NSD so it is deployed later on
423 # each SAP get a unique VNFD and vnf_id in the NSD
424 self
.nsd
["network_functions"].append({"vnf_id": sap_docker_name
, "vnf_name": sap_docker_name
})
425 LOG
.debug("Loaded SAP: %r" % sap_vnfd
.get("name"))
427 def _load_docker_files(self
):
429 Get all paths to Dockerfiles from VNFDs and store them in dict.
432 for k
, v
in self
.vnfds
.iteritems():
433 for vu
in v
.get("virtual_deployment_units"):
434 if vu
.get("vm_image_format") == "docker":
435 vm_image
= vu
.get("vm_image")
436 docker_path
= os
.path
.join(
437 self
.package_content_path
,
438 make_relative_path(vm_image
))
439 self
.local_docker_files
[k
] = docker_path
440 LOG
.debug("Found Dockerfile (%r): %r" % (k
, docker_path
))
442 def _load_docker_urls(self
):
444 Get all URLs to pre-build docker images in some repo.
447 for k
, v
in self
.vnfds
.iteritems():
448 for vu
in v
.get("virtual_deployment_units"):
449 if vu
.get("vm_image_format") == "docker":
450 url
= vu
.get("vm_image")
452 url
= url
.replace("http://", "")
453 self
.remote_docker_image_urls
[k
] = url
454 LOG
.debug("Found Docker image URL (%r): %r" % (k
, self
.remote_docker_image_urls
[k
]))
456 def _build_images_from_dockerfiles(self
):
458 Build Docker images for each local Dockerfile found in the package: self.local_docker_files
460 if GK_STANDALONE_MODE
:
461 return # do not build anything in standalone mode
463 LOG
.info("Building %d Docker images (this may take several minutes) ..." % len(self
.local_docker_files
))
464 for k
, v
in self
.local_docker_files
.iteritems():
465 for line
in dc
.build(path
=v
.replace("Dockerfile", ""), tag
=k
, rm
=False, nocache
=False):
466 LOG
.debug("DOCKER BUILD: %s" % line
)
467 LOG
.info("Docker image created: %s" % k
)
469 def _pull_predefined_dockerimages(self
):
471 If the package contains URLs to pre-build Docker images, we download them with this method.
474 for url
in self
.remote_docker_image_urls
.itervalues():
475 if not FORCE_PULL
: # only pull if not present (speedup for development)
476 if len(dc
.images(name
=url
)) > 0:
477 LOG
.debug("Image %r present. Skipping pull." % url
)
479 LOG
.info("Pulling image: %r" % url
)
481 insecure_registry
=True)
483 def _check_docker_image_exists(self
, image_name
):
485 Query the docker service and check if the given image exists
486 :param image_name: name of the docker image
489 return len(DockerClient().images(image_name
)) > 0
491 def _calculate_placement(self
, algorithm
):
493 Do placement by adding the a field "dc" to
494 each VNFD that points to one of our
495 data center objects known to the gatekeeper.
497 assert(len(self
.vnfds
) > 0)
498 assert(len(GK
.dcs
) > 0)
499 # instantiate algorithm an place
501 p
.place(self
.nsd
, self
.vnfds
, GK
.dcs
)
502 LOG
.info("Using placement algorithm: %r" % p
.__class
__.__name
__)
503 # lets print the placement result
504 for name
, vnfd
in self
.vnfds
.iteritems():
505 LOG
.info("Placed VNF %r on DC %r" % (name
, str(vnfd
.get("dc"))))
509 Some (simple) placement algorithms
513 class FirstDcPlacement(object):
515 Placement: Always use one and the same data center from the GK.dcs dict.
517 def place(self
, nsd
, vnfds
, dcs
):
518 for name
, vnfd
in vnfds
.iteritems():
519 vnfd
["dc"] = list(dcs
.itervalues())[0]
522 class RoundRobinDcPlacement(object):
524 Placement: Distribute VNFs across all available DCs in a round robin fashion.
526 def place(self
, nsd
, vnfds
, dcs
):
528 dcs_list
= list(dcs
.itervalues())
529 for name
, vnfd
in vnfds
.iteritems():
530 vnfd
["dc"] = dcs_list
[c
% len(dcs_list
)]
531 c
+= 1 # inc. c to use next DC
537 Resource definitions and API endpoints
541 class Packages(fr
.Resource
):
545 Upload a *.son service package to the dummy gatekeeper.
547 We expect request with a *.son file and store it in UPLOAD_FOLDER
553 # lets search for the package in the request
554 if "package" in request
.files
:
555 son_file
= request
.files
["package"]
556 # elif "file" in request.files:
557 # son_file = request.files["file"]
559 return {"service_uuid": None, "size": 0, "sha1": None, "error": "upload failed. file not found."}, 500
560 # generate a uuid to reference this package
561 service_uuid
= str(uuid
.uuid4())
562 file_hash
= hashlib
.sha1(str(son_file
)).hexdigest()
563 # ensure that upload folder exists
564 ensure_dir(UPLOAD_FOLDER
)
565 upload_path
= os
.path
.join(UPLOAD_FOLDER
, "%s.son" % service_uuid
)
566 # store *.son file to disk
567 son_file
.save(upload_path
)
568 size
= os
.path
.getsize(upload_path
)
569 # create a service object and register it
570 s
= Service(service_uuid
, file_hash
, upload_path
)
571 GK
.register_service_package(service_uuid
, s
)
572 # generate the JSON result
573 return {"service_uuid": service_uuid
, "size": size
, "sha1": file_hash
, "error": None}, 201
574 except Exception as ex
:
575 LOG
.exception("Service package upload failed:")
576 return {"service_uuid": None, "size": 0, "sha1": None, "error": "upload failed"}, 500
580 Return a list of UUID's of uploaded service packages.
583 LOG
.info("GET /packages")
584 return {"service_uuid_list": list(GK
.services
.iterkeys())}
587 class Instantiations(fr
.Resource
):
591 Instantiate a service specified by its UUID.
592 Will return a new UUID to identify the running service instance.
595 # try to extract the service uuid from the request
596 json_data
= request
.get_json(force
=True)
597 service_uuid
= json_data
.get("service_uuid")
599 # lets be a bit fuzzy here to make testing easier
600 if service_uuid
is None and len(GK
.services
) > 0:
601 # if we don't get a service uuid, we simple start the first service in the list
602 service_uuid
= list(GK
.services
.iterkeys())[0]
604 if service_uuid
in GK
.services
:
605 # ok, we have a service uuid, lets start the service
606 service_instance_uuid
= GK
.services
.get(service_uuid
).start_service()
607 return {"service_instance_uuid": service_instance_uuid
}
608 return "Service not found", 404
612 Returns a list of UUIDs containing all running services.
615 LOG
.info("GET /instantiations")
616 return {"service_instantiations_list": [
617 list(s
.instances
.iterkeys()) for s
in GK
.services
.itervalues()]}
620 # create a single, global GK object
623 app
= Flask(__name__
)
624 app
.config
['MAX_CONTENT_LENGTH'] = 512 * 1024 * 1024 # 512 MB max upload
627 api
.add_resource(Packages
, '/packages')
628 api
.add_resource(Instantiations
, '/instantiations')
631 def start_rest_api(host
, port
, datacenters
=dict()):
633 # start the Flask server (not the best performance but ok for our use case)
637 use_reloader
=False # this is needed to run Flask in a non-main thread
641 def ensure_dir(name
):
642 if not os
.path
.exists(name
):
647 with
open(path
, "r") as f
:
650 except yaml
.YAMLError
as exc
:
651 LOG
.exception("YAML parse error")
656 def make_relative_path(path
):
657 if path
.startswith("file://"):
658 path
= path
.replace("file://", "", 1)
659 if path
.startswith("/"):
660 path
= path
.replace("/", "", 1)
664 def generate_lan_string(prefix
, base
, subnet_size
=24, ip
=0):
666 Helper to generate different network configuration strings.
668 r
= "%s.%d.%d/%d" % (prefix
, base
, ip
, subnet_size
)
672 def generate_subnet_strings(n
, start
=1, subnet_size
=24, ip
=0):
674 Helper to generate different network configuration strings.
677 for i
in range(start
, start
+ n
):
678 r
.append("%d.0.0.%d/%d" % (i
, ip
, subnet_size
))
682 if __name__
== '__main__':
684 Lets allow to run the API in standalone mode.
686 GK_STANDALONE_MODE
= True
687 logging
.getLogger("werkzeug").setLevel(logging
.INFO
)
688 start_rest_api("0.0.0.0", 8000)