Thanks, I am looking at the discovery module, which is helpful.
Also, found a small bug
In netapps/discovery/discoveryws.py
from nox.webapps.webserver.webservice import json_parse_message_body
^^^^^^^^^
from nox.webapps.webserver.webservice import NOT_DONE_YET
should be
from nox.webapps.webservice.webservice import json_parse_message_body
from nox.webapps.webservice.webservice import NOT_DONE_YET
Pradeep
> -----Original Message-----
> From: Martin Casado [mailto:[email protected]]
> Sent: Thursday, October 15, 2009 12:08 PM
> To: Natasha Gude
> Cc: Pradeep Padala; [email protected]
> Subject: Re: [nox-dev] pytopology usage question
>
> Alternatively, you can just register for link-events and keep track of
> the topology yourself.
>
> > datapathids are IDs of the Openflow switches that have joined.
These
> > IDs are included in datapath_join events, which you can register for
> > using self.register_for_datapath_join(callback) in any python
component.
> >
> > Unfortunately we currently don't have a way for dumping the entire
> > topology.
> >
> > Natasha
> >
> > On Oct 15, 2009, at 11:34 AM, Pradeep Padala wrote:
> >
> >> Hi Natasha,
> >>
> >> I can use this, but I don't know the host ids. When I try to use 0
and
> >> 1, I just get empty list. How are these host ids related to the
output
> >> produced by dpctl?
> >>
> >> Is there a simple way to dump the complete topology into a data
> >> structure?
> >>
> >> Thanks,
> >> Pradeep
> >>
> >>> -----Original Message-----
> >>> From: Natasha Gude [mailto:[email protected]]
> >>> Sent: Wednesday, October 14, 2009 6:22 PM
> >>> To: Pradeep Padala
> >>> Cc: Martin Casado; [email protected]
> >>> Subject: Re: [nox-dev] make check fails "Import by filename is not
> >>> supported"
> >>>
> >>> Hi Pradeep,
> >>>
> >>> pytopology has a method get_outlinks thats takes a source
datapathid
> >>> and destination datapathid, and returns a list of all of the port
> >>> pairs that are connected. This is defined in pytopology.i
> >>>
> >>> For example:
> >>>
> >>> if datapath 1's ports 5 and 6 are connected to datapath 2's ports
3
> >>> and 4 respectively, you would have the following.
> >>>
> >>> from nox.lib.netinet.netinet import create_datapathid_from_host
> >>>
> >>> dp1 = create_datapathid_from_host(1)
> >>> dp2 = create_datapathid_from_host(2)
> >>> ports = pytop.get_outlinks(dp1, dp2)
> >>>
> >>> where ports would be a list of PyLinkPorts of length 2, where
> >>> PyLinkPorts is described in that pytopology.i file. Particularly
it
> >>> would be the equivalent of [ (5, 3), (6, 4) ] , however it's
actually
> >>> a SWIG-ed out list, which needs to be iterated through using
begin(),
> >>> incr(), and end().
> >>>
> >>> Hope that helps,
> >>> Natasha
> >>>
> >>> On Oct 14, 2009, at 5:56 PM, Pradeep Padala wrote:
> >>>
> >>>> That works for me. I also looked at miscws/noxinfows.py, which
seems
> >>>> to
> >>>> do some of the things I wanted.
> >>>>
> >>>> I am trying to modify noxinfows.py to return topology. I got a
> >> handle
> >>>> for pytopology with
> >>>>
> >>>> self.pytop = self.resolve(pytopology)
> >>>>
> >>>> Later, when the GET request comes, I am calling the function I
wrote
> >>>> below
> >>>>
> >>>> def _get_nox_topology(self, request, arg):
> >>>> try:
> >>>> return simplejson.dumps(self.pytop.XXXXXXXXXXXXXXXXX)
> >>>> except Exception, e:
> >>>> return self.err(Failure(), request, "_get_topology",
> >>>> "Could not retrieve topology")
> >>>>
> >>>> Now, I don't know how to access the pytopology functions
> >> (XXXXXXXXXXXX
> >>>> part). For example, the get_outlinks() function takes two
arguments,
> >>>> but
> >>>> in the C++ file, I didn't find any comments on what to pass here.
> >>>>
> >>>> In the manual, there are just a few notes about the topology
module,
> >>>> grepping through the whole source tree, I didn't find any
examples
> >> of
> >>>> using pytopology (may be I am missing something).
> >>>>
> >>>> Any help would be great.
> >>>>
> >>>> Thanks,
> >>>> Pradeep
> >
> >
> > _______________________________________________
> > nox-dev mailing list
> > [email protected]
> > http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
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