Hi Douglas, I checked "L2DestForwardStaticRyu.py", and it seems to be "hacked" to run app without "ryu-manager". To start the built-in Ryu application with "L2DestForwardStaticRyu.py", how about the following? The following appends to "ofctl_rest" app to the argument of "manager".
e.g.) around line 91: if __name__ == "__main__": - manager.main(args=sys.argv) + manager.main(args=sys.argv + ['ryu.app.ofctl_rest']) Thanks, Iwase On 2017年06月09日 21:00, Douglas Harewood-Gill wrote: > Hi Iwase. Thank you for contacting me and apologies for my delay in > responding. I have tried what you have suggested but the problem I have is > that the L2DestForwardStaticRyu.py program is designed to run on its own. It > imports the the ryu.cmd import manager and uses the Ryu controller but you > start it by typing "|python l2DestForwardStaticRyu.py > --netfile=ExNetwithLoops1A.json" |where it imports =ExNetWithLoops1A.Json. > When this program is started, it automatically loads Ryu and implements the > code within this program. I am not sure how to start the this and > ryu.app.ofctl_rest at the same time. I have tried starting them separately in > different terminals but that did not work. > > Thank you also for the information you have sent. I have looked at it before > but I do not know how to implement this with my custom code. I have been > looking for examples but they seem to be few and far between. Any advice as > always would be greatly appreciated. > > Thanks again. > > Douglas > > On 8 June 2017 at 01:27, Iwase Yusuke <iwase.yusu...@gmail.com > <mailto:iwase.yusu...@gmail.com>> wrote: > > Hi Douglas, > > Excuse me for cutting in. > > Just for getting flow statistics, how about running your app and > ofctl_rest > together as Fujimoto said. > e.g.) > $ ryu-manager your_app.py ryu.app.ofctl_rest > > > If you want to implement your own REST APIs on your app, Ryu-Book is the > most helpful as far as I know. > (You might already be aware of this though...) > http://osrg.github.io/ryu-book/en/html/rest_api.html > <http://osrg.github.io/ryu-book/en/html/rest_api.html> > > > FYI, here is an sample implementation on simple_switch_13.py for getting > flow statistics. > The usage of "WSGI" framework is described on Ryu-Book. > > > $ git diff > diff --git a/ryu/app/simple_switch_13.py b/ryu/app/simple_switch_13.py > index 3e7c598..f33e474 100644 > --- a/ryu/app/simple_switch_13.py > +++ b/ryu/app/simple_switch_13.py > @@ -13,6 +13,8 @@ > # See the License for the specific language governing permissions and > # limitations under the License. > > +import json > + > from ryu.base import app_manager > from ryu.controller import ofp_event > from ryu.controller.handler import CONFIG_DISPATCHER, MAIN_DISPATCHER > @@ -21,14 +23,26 @@ from ryu.ofproto import ofproto_v1_3 > from ryu.lib.packet import packet > from ryu.lib.packet import ethernet > from ryu.lib.packet import ether_types > +from ryu.app.ofctl import api as ofctl_api > +from ryu.app.wsgi import ControllerBase > +from ryu.app.wsgi import Response > +from ryu.app.wsgi import route > +from ryu.app.wsgi import WSGIApplication > + > + > +_URI_PREFIX = '/simpleswitch/stats/{dpid}' > > > class SimpleSwitch13(app_manager.RyuApp): > OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION] > + _CONTEXTS = {'wsgi': WSGIApplication} > > def __init__(self, *args, **kwargs): > super(SimpleSwitch13, self).__init__(*args, **kwargs) > self.mac_to_port = {} > + wsgi = kwargs['wsgi'] > + wsgi.register(SimpleSwitchController, > + {SimpleSwitch13.__name__: self}) > > @set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER) > def switch_features_handler(self, ev): > @@ -117,3 +131,32 @@ class SimpleSwitch13(app_manager.RyuApp): > out = parser.OFPPacketOut(datapath=datapath, > buffer_id=msg.buffer_id, > in_port=in_port, actions=actions, > data=data) > datapath.send_msg(out) > + > + def get_flow_stats(self, dpid): > + datapath = ofctl_api.get_datapath(self, dpid) > + if datapath is None: > + return None > + > + parser = datapath.ofproto_parser > + req = parser.OFPFlowStatsRequest(datapath) > + > + rep = ofctl_api.send_msg( > + app=self, msg=req, > + reply_cls=parser.OFPFlowStatsReply, reply_multi=True) > + return [r.to_jsondict() for r in rep] > + > + > +class SimpleSwitchController(ControllerBase): > + > + def __init__(self, req, link, data, **config): > + super(SimpleSwitchController, self).__init__(req, link, data, > **config) > + self.simple_switch_app = data[SimpleSwitch13.__name__] > + > + @route('simpleswitch', _URI_PREFIX, methods=['GET']) > + def list_mac_table(self, req, **kwargs): > + dpid = int(str(kwargs['dpid'])) > + ret = self.simple_switch_app.get_flow_stats(dpid) > + if ret is None: > + return Response(status=404) > + > + return Response(content_type='application/json', > body=json.dumps(ret)) > > > $ ryu-manager ryu/app/simple_switch_13.py > Registered VCS backend: git > Registered VCS backend: hg > Registered VCS backend: svn > Registered VCS backend: bzr > loading app ryu/app/simple_switch_13.py > loading app ryu.controller.ofp_handler > loading app ryu.app.ofctl.service > loading app ryu.controller.ofp_handler > creating context wsgi > instantiating app ryu.app.ofctl.service of OfctlService > instantiating app ryu/app/simple_switch_13.py of SimpleSwitch13 > instantiating app ryu.controller.ofp_handler of OFPHandler > (10332) wsgi starting up on http://0.0.0.0:8080 > ... > > > $ curl -X GET http://localhost:8080/simpleswitch/stats/1 > <http://localhost:8080/simpleswitch/stats/1> | python -m json.tool > [ > { > "OFPFlowStatsReply": { > "body": [ > { > "OFPFlowStats": { > "byte_count": 140, > "cookie": 0, > "duration_nsec": 771000000, > "duration_sec": 1, > "flags": 0, > "hard_timeout": 0, > "idle_timeout": 0, > "instructions": [ > { > "OFPInstructionActions": { > "actions": [ > { > "OFPActionOutput": { > "len": 16, > "max_len": 65535, > "port": 4294967293, > "type": 0 > } > } > ], > "len": 24, > "type": 4 > } > } > ], > "length": 80, > "match": { > "OFPMatch": { > "length": 4, > "oxm_fields": [], > "type": 1 > } > }, > "packet_count": 2, > "priority": 0, > "table_id": 0 > } > } > ], > "flags": 0, > "type": 1 > } > } > ] > > > Thanks, > Iwase > > > On 2017年06月07日 20:21, Douglas Harewood-Gill wrote: > > Hi there. That is fantastic. Sounds exactly like what I am looking for > so thank you. > > > > One last question for the minute. I know you provided a link but how do > you implement this with custom Ryu controller code? > > > > My apologies if I am asking something really obvious. > > > > Cheers > > > > Douglas > > > > On 7 June 2017 at 01:15, Fujimoto Satoshi <satoshi.fujimo...@gmail.com > <mailto:satoshi.fujimo...@gmail.com> <mailto:satoshi.fujimo...@gmail.com > <mailto:satoshi.fujimo...@gmail.com>>> wrote: > > > > Hi, Douglas > > > > Ryu has ofctl_rest.py, which is a sample application and provides > REST API to get flow statistics. > > http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html > <http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html> > <http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html > <http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html>> > > > > I think it is better to use ofctl_rest.py than to implement your > own REST API in your app. > > > > Thanks, > > Fujimoto > > > > > > On 2017年06月06日 21:18, Douglas Harewood-Gill wrote: > >> > >> Greetings I am a PhD student new to both Python and Ryu and I was > wondering if anyone could give me some advice. > >> > >> > >> I am using the Ryu controller program (L2DestForwardStaticRyu.py) > provided by Dr Grey Bernstein > (https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu > <https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu> > <https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu > <https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu>>) > for shortest path computation for a full Mesh network in Mininet but the > example provided does not include REST which I require to be able to collect > flow statistics such as the flows in each router, bandwidth, latency, etc. > >> > >> > >> Unfortunately I have been looking and with the exception of > (https://osrg.github.io/ryu-book/en/html/rest_api.html > <https://osrg.github.io/ryu-book/en/html/rest_api.html> > <https://osrg.github.io/ryu-book/en/html/rest_api.html > <https://osrg.github.io/ryu-book/en/html/rest_api.html>>) which seems overly > specific, I am unable to find a good example that would allow me to work out > how to integrate REST into the above Ryu control program. > >> > >> So if anyone can point me in the right direction or can provide > some examples, I would be most grateful. > >> > >> > >> Thank you for your time. > >> > >> > >> Best Regards > >> > >> > >> Douglas > >> > >> > >> > >> -- > >> *Douglas Harewood-Gill MSc MIET* > >> CDT Student in Communications (PhD), University of Bristol > >> Post-Graduate Student (Taught and Research) > >> e-mail: douglas.harewood-g...@bristol.ac.uk > <mailto:douglas.harewood-g...@bristol.ac.uk> > <mailto:douglas.harewood-g...@bristol.ac.uk > <mailto:douglas.harewood-g...@bristol.ac.uk>> > >> > >> * > >> CDT Communications* > >> > >> University of Bristol, Merchant Venturers' Building, Woodland > Road, Clifton, Bristol. BS8 1UB > >> > >> http://www.bristol.ac.uk/ > >> > >> > >> > >> > >> > ------------------------------------------------------------------------------ > >> Check out the vibrant tech community on one of the world's most > >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot > >> > >> > >> _______________________________________________ > >> Ryu-devel mailing list > >> Ryu-devel@lists.sourceforge.net > <mailto:Ryu-devel@lists.sourceforge.net> > <mailto:Ryu-devel@lists.sourceforge.net > <mailto:Ryu-devel@lists.sourceforge.net>> > >> https://lists.sourceforge.net/lists/listinfo/ryu-devel > <https://lists.sourceforge.net/lists/listinfo/ryu-devel> > <https://lists.sourceforge.net/lists/listinfo/ryu-devel > <https://lists.sourceforge.net/lists/listinfo/ryu-devel>> > > > > > > > > > > -- > > *Douglas Harewood-Gill MSc MIET* > > CDT Student in Communications (PhD), University of Bristol > > Post-Graduate Student (Taught and Research) > > e-mail: douglas.harewood-g...@bristol.ac.uk > <mailto:douglas.harewood-g...@bristol.ac.uk> > <mailto:douglas.harewood-g...@bristol.ac.uk > <mailto:douglas.harewood-g...@bristol.ac.uk>> > > > > * > > CDT Communications* > > > > University of Bristol, Merchant Venturers' Building, Woodland Road, > Clifton, Bristol. BS8 1UB > > > > http://www.bristol.ac.uk/ > > > > > > > > > > > ------------------------------------------------------------------------------ > > Check out the vibrant tech community on one of the world's most > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > > > > > > > _______________________________________________ > > Ryu-devel mailing list > > Ryu-devel@lists.sourceforge.net <mailto:Ryu-devel@lists.sourceforge.net> > > https://lists.sourceforge.net/lists/listinfo/ryu-devel > <https://lists.sourceforge.net/lists/listinfo/ryu-devel> > > > > > > > -- > *Douglas Harewood-Gill MSc MIET* > CDT Student in Communications (PhD), University of Bristol > Post-Graduate Student (Taught and Research) > e-mail: douglas.harewood-g...@bristol.ac.uk > <mailto:douglas.harewood-g...@bristol.ac.uk> > > * > CDT Communications* > > University of Bristol, Merchant Venturers' Building, Woodland Road, Clifton, > Bristol. BS8 1UB > > http://www.bristol.ac.uk/ > > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > > > _______________________________________________ > Ryu-devel mailing list > Ryu-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/ryu-devel > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Ryu-devel mailing list Ryu-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ryu-devel
