[openstack-dev] [Neutron] Debugging Devstack Neutron with Pycharm

Gal Sagie gsagie at vmware.com
Wed Jun 11 12:36:07 UTC 2014

Thanks a lot, this works, i will update the wiki. 

----- Original Message -----

From: "Henry Gessau" <gessau at cisco.com> 
To: openstack-dev at lists.openstack.org 
Sent: Wednesday, June 11, 2014 2:41:47 PM 
Subject: Re: [openstack-dev] [Neutron] Debugging Devstack Neutron with Pycharm 

Gal Sagie wrote: 

I am trying to debug devstack Neutron with Pycharm, i have found here ( https://wiki.openstack.org/wiki/NeutronDevelopment#How_to_debug_Neutron_.28and_other_OpenStack_projects_probably_.29 ) 
That i need to change the neutron server code to this=> eventlet.monkey_patch() To: eventlet.monkey_patch(os=False, thread=False) 

I don't need to do this. But I do need to go into the PyCharm settings under Python Debugger and enable "Gevent compatible debugging". 


I have done so, debug seems to run, but when i am trying to initiate commands from the CLI i get this: 

gal at ubuntu:~/devstack$ neutron net-list 
Connection to neutron failed: Maximum attempts reached 

Are you sure you have sourced openrc correctly for the credentials? 


(the server seems to run ok...) 

Any help is appreciated as i am trying to learn and understand main flows by debugging the code locally. 

First I start devstack in offline mode. 
OFFLINE=True ./stack.sh 

Once it is running I go to the neutron window in screen. 
There I stop neutron-server with ctrl-C, and press up-arrow to view the start command. 

To run neutron-server in the PyCharm debugger edit the Run/Debug configuration with the following settings: 

Script: /usr/local/bin/neutron-server 
Script params: --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini 
# I got this from the screen window where I stopped neutron 
Working directory: /opt/stack/neutron 

Now restart neutron from PyCharm instead of screen. 

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