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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Salman,<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">I haven’t used UI tools like Pydev and/or eclipse. I have a devstack installation running on linux box where I use ssh for all my development.<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">TL;DR Version : I use pdb (aka Python Debugger) It is very easy to use if you have used gdb - (Refer to
</span><a href="http://docs.python.org/library/pdb.html#debugger-commands">http://docs.python.org/library/pdb.html#debugger-commands</a>
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">if you are unfamiliar with pdb)<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">Longer Version:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">To trace how the “allocate_for_instance” works for Quantum – put “pdb.set_trace()” in method “def allocate_for_instance” in file nova/network/quantum/manager.py<o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">You also need “import pdb” somewhere at the top in the same file.<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="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Stop and restart nova-network process from “screen” (So that modified nova/network/quantum/manager.py is used.)<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="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Try to create an instance (which eventually needs to allocate fixed IP for the instance) Now go to “nova-network” console – as soon as RPC call is
made to the method “allocate_for_instance” , execution will stop and you are presented with (pdb) interactive prompt – From here on you can debug using pdb commands
<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"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">-Mandar<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"><o:p> </o:p></span></p>
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<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""> openstack-bounces+mandar.vaze=nttdata.com@lists.launchpad.net [mailto:openstack-bounces+mandar.vaze=nttdata.com@lists.launchpad.net]
<b>On Behalf Of </b>Salman Malik<br>
<b>Sent:</b> Monday, June 11, 2012 10:49 PM<br>
<b>To:</b> openstack@lists.launchpad.net<br>
<b>Subject:</b> [Openstack] Development/Debugging<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#366092">Hi All,<br>
<br>
I have been trying to get my head around the OpenStack functionality for a while now but unfortunately haven't been able to grasp it. I am interested on working on Quantum (and may be creating new plugins) but I am still unable to debug my own problems. So
I thought it would be best for me to learn from how code works. Although I have been looking at the code for quite some time but didn't get anywhere. Now I have installed Pydev on Eclipse and am wondering how to run the massive OpenStack code in debug mode
(so as to learn the call/control flow) ? So I thought I could get some help from OpenStack gurus like how do you people develop/debug problems ? What environment are you using ? Any suggestions/tips are welcome.
<br>
(Please note that I have read the nova and Quantum administration guides and also looked at the nova developer's guide)<br>
<br>
Any help would be much appreciated.<br>
<br>
Thanks,<br>
Salman</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><o:p></o:p></span></p>
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