Large user data (>8k) prevents creation of VMs

[Burt Holzman]

This affects all openstack versions AFAIK, but we saw this with Folsom (EPEL openstack-nova-api-2012.2.2-1.el6).

We have an application that sends in large amounts of userdata via the URI. However, eventlet.wsgi.server() has url_length_limit=8192 as a default argument. (Since it was coupled with bug 1054501, it was not obvious from the server side what was going on, but the client was returning HTTP Error 414).

Here's a simple fix against master.

(edited to include a better patch):
https://github.com/holzman/nova/commit/bc05982a2691108a421594bde81ff3d16d8fedbe

[Davanum Srinivas (DIMS) (dims-v)]

Burt,

Can you please submit a git review per the process here?
http://wiki.openstack.org/HowToContribute#If_you.27re_a_developer.2C_start_here:

thanks,
dims

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/19842

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/19842
Committed: http://github.com/openstack/nova/commit/dfec46ac8e4cba23da842698c2bc746c03994afe
Submitter: Jenkins
Branch: master

commit dfec46ac8e4cba23da842698c2bc746c03994afe
Author: Burt Holzman <email address hidden>
Date: Thu Jan 24 00:24:09 2013 -0600

    Increase maximum URI size for EC2 API to 16k

    The EC2 API supports both HTTP GET and POST agnostically. It also supports
    user-data of 16k -- meaning that client tools could generate 16k URIs.
    The WSGI default limit is 8k; this raises it.

    Fixes bug 1098646.

    Change-Id: Idec460d88b2affab970c9d9f39fa61295db035c5