Salman,
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.
TL;DR Version : I use pdb (aka Python Debugger) It is very easy to use if you
have used gdb - (Refer to
http://docs.python.org/library/pdb.html#debugger-commands if you are unfamiliar
with pdb)
Longer Version:
* 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
You also need "import pdb" somewhere at the top in the same file.
* Stop and restart nova-network process from "screen" (So that modified
nova/network/quantum/manager.py is used.)
* 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
-Mandar
From: openstack-bounces+mandar.vaze=nttdata....@lists.launchpad.net
[mailto:openstack-bounces+mandar.vaze=nttdata....@lists.launchpad.net] On
Behalf Of Salman Malik
Sent: Monday, June 11, 2012 10:49 PM
To: openstack@lists.launchpad.net
Subject: [Openstack] Development/Debugging
Hi All,
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.
(Please note that I have read the nova and Quantum administration guides and
also looked at the nova developer's guide)
Any help would be much appreciated.
Thanks,
Salman
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