[Openstack] Openstack Nova/Quantum :; api-paste.ini file

Michael Basnight mbasnight at gmail.com
Thu Dec 6 19:13:46 UTC 2012

Seems like a good start to a wiki page to me :)

Sent from my digital shackles

On Dec 6, 2012, at 11:27 AM, "Kevin L. Mitchell" <kevin.mitchell at rackspace.com> wrote:

> Honestly, I don't understand your questions; I figured the documentation
> I pointed you to would answer them, and the fact it doesn't suggests
> that you're not asking what I thought you were asking.  Maybe an
> approach from the beginning:
> Nova, Quantum, Glance, Keystone, etc. all have, as components, a REST
> API.  They use the PasteDeploy package to build this API; PasteDeploy
> provides a means of building a WSGI stack (WSGI is the Python Web Server
> Gateway Interface, an interface by which HTTP requests can be presented
> to a Python application; it allows for not only an application, but also
> a set of "middleware", which wraps the application and can provide
> enhancements).
> The various configuration files you reference are used by PasteDeploy to
> construct the WSGI stack for the API; that is, the configuration file
> tells PasteDeploy that the nova-api service is composed of a specified
> controller, wrapped by middleware that implements exception trap
> translation, authentication checks, ratelimit enforcement, etc., all in
> a specific order.  In essence, the configuration file acts sort of like
> code, rather than configuration; it expresses the structure of the final
> application.  (Although configuration can also be expressed in the file,
> we're trying to avoid that, so that we don't mix configuration with
> code.)
> Does that help you some?
> On Thu, 2012-12-06 at 22:29 +0530, Trinath Somanchi wrote:
>> [1] What is the significance of the api-paste.ini file in the
>> configuration of nova/quantum and other modules of ipenstack?
>> [2] How do the modules use these API configuration options? How they
>> are used different from normal ".conf" files?
> -- 
> Kevin L. Mitchell <kevin.mitchell at rackspace.com>
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