Nova Exercise 1.rst

Trace Nova client server code path

Run the following commands:

1. Log into your VM as stack user

2. Issue the following commands:

   cd devstack
   source openrc admin admin
   nova --debug list
   

3. Trace and document the code path that is taken from 'nova client' to 'nova server' for this list command to work. The nova client code is located at /opt/stack/python-novaclient and the nova server code is loctaed at /opt/stack/nova/nova.

   • Check the client.py file in python-novaclient/novaclient/[nova version]/client.py

   • Check the shell.py file in python-novaclient/novaclient/[nova version]/shell.py

   • The command for checking the endpoint URLs is:

     keystone endpoint-list
     keystone service-list
     

   • Find the method (function) that nova list calls

   • Nova and Keystone Documentation:

     • http://docs.openstack.org/developer/keystone/
     • http://docs.openstack.org/developer/nova/
     • http://docs.openstack.org/developer/nova/architecture.html
     • http://docs.openstack.org/developer/keystone/architecture.html

   • To check if code has been modified from when it was checked out:

     git status (in the source directory of the particular component)
     git diff <filename> (This will give you differences from the original version of the file)
     

Debugging Hints are at https://github.com/UTSA-ICS/devstack-101/blob/master/Debugging%20hints.rst