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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">There was a presentation on DON at the Vancouver summit. Here is the link:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">https://www.openstack.org/summit/vancouver-2015/summit-videos/presentation/don-diagnosing-ovs-in-neutron<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Salvatore Orlando [mailto:salv.orlando@gmail.com]
<br>
<b>Sent:</b> Tuesday, September 22, 2015 3:51 AM<br>
<b>To:</b> OpenStack Development Mailing List (not for usage questions)<br>
<b>Subject:</b> Re: [openstack-dev] [neutron] Neutron debugging tool<o:p></o:p></span></p>
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<p class="MsoNormal">Thanks Ganesh!<o:p></o:p></p>
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<p class="MsoNormal">I did not know about this tool.<o:p></o:p></p>
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<p class="MsoNormal">I also quite like the network visualization bits, though I wonder how practical that would be when one debugs very large deployments.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I think it won't be a bad idea to list these tools in the networking guide or in neutron's devref, or both.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Salvatore<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On 22 September 2015 at 04:25, Ganesh Narayanan (ganeshna) <<a href="mailto:ganeshna@cisco.com" target="_blank">ganeshna@cisco.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">Another project for diagnosing OVS in Neutron:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><a href="https://github.com/CiscoSystems/don" target="_blank">https://github.com/CiscoSystems/don</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">Thanks,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">Ganesh<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">From:
</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">Salvatore Orlando <<a href="mailto:salv.orlando@gmail.com" target="_blank">salv.orlando@gmail.com</a>><br>
<b>Reply-To: </b>OpenStack Development Mailing List <<a href="mailto:openstack-dev@lists.openstack.org" target="_blank">openstack-dev@lists.openstack.org</a>><br>
<b>Date: </b>Monday, 21 September 2015 2:55 pm<br>
<b>To: </b>OpenStack Development Mailing List <<a href="mailto:openstack-dev@lists.openstack.org" target="_blank">openstack-dev@lists.openstack.org</a>><br>
<b>Subject: </b>Re: [openstack-dev] [neutron] Neutron debugging tool<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">It sounds like indeed that easyOVS covers what you're aiming too.
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">However, from what I gather there is still plenty to do in easy OVS, so perhaps rather than starting a new toolset from scratch you might build on the existing
one.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">Personally I'd welcome its adoption into the Neutron stadium as debugging control plane/data plane issues in the neutron reference impl is becoming difficult
also for expert users and developers.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">I'd just suggest renaming it because calling it "OVS" is just plain wrong. The neutron reference implementation and OVS are two distinct things.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">As concern neutron-debug, this is a tool that was developed in the early stages of the project to verify connectivity using "probes" in namespaces. These probes
are simply tap interfaces associated with neutron ports. The neutron-debug tool is still used in some devstack exercises. Nevertheless, I'd rather keep building something like easyOVS and then deprecated neutron-debug rather than develop it.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">Salvatore<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">On 21 September 2015 at 02:40, Li Ma <<a href="mailto:skywalker.nick@gmail.com" target="_blank">skywalker.nick@gmail.com</a>> wrote:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">AFAIK, there is a project available in the github that does the same thing.<br>
<a href="https://github.com/yeasy/easyOVS" target="_blank">https://github.com/yeasy/easyOVS</a><br>
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I used it before.<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><br>
On Mon, Sep 21, 2015 at 12:17 AM, Nodir Kodirov <<a href="mailto:nodir.qodirov@gmail.com" target="_blank">nodir.qodirov@gmail.com</a>> wrote:<br>
> Hello,<br>
><br>
> I am planning to develop a tool for network debugging. Initially, it<br>
> will handle DVR case, which can also be extended to other too. Based<br>
> on my OpenStack deployment/operations experience, I am planning to<br>
> handle common pitfalls/misconfigurations, such as:<br>
> 1) check external gateway validity<br>
> 2) check if appropriate qrouter/qdhcp/fip namespaces are created in<br>
> compute/network hosts<br>
> 3) execute probing commands inside namespaces, to verify reachability<br>
> 4) etc.<br>
><br>
> I came across neutron-debug [1], which mostly focuses on namespace<br>
> debugging. Its coverage is limited to OpenStack, while I am planning<br>
> to cover compute/network nodes as well. In my experience, I had to ssh<br>
> to the host(s) to accurately diagnose the failure (e.g., 1, 2 cases<br>
> above). The tool I am considering will handle these, given the host<br>
> credentials.<br>
><br>
> I'd like get community's feedback on utility of such debugging tool.<br>
> Do people use neutron-debug on their OpenStack environment? Does the<br>
> tool I am planning to develop with complete diagnosis coverage sound<br>
> useful? Anyone is interested to join the development? All feedback are<br>
> welcome.<br>
><br>
> Thanks,<br>
><br>
> - Nodir<br>
><br>
> [1] <a href="http://docs.openstack.org/cli-reference/content/neutron-debug_commands.html" target="_blank">
http://docs.openstack.org/cli-reference/content/neutron-debug_commands.html</a><br>
><br>
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http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a><br>
<br>
<br>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#888888">--<br>
<br>
Li Ma (Nick)<br>
Email: <a href="mailto:skywalker.nick@gmail.com" target="_blank">skywalker.nick@gmail.com</a></span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p></o:p></span></p>
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