Open Stack

Hi,

This is about review:
https://review.openstack.org/#/c/156633/

1 line, can be controversial

Its purpose is to add the possibility not to use libguestfs for data 
injection in nova, even when installed.

Not discussing about the fact that libguestfs should be preferred over 
fuse mounts for data injection as much as possible because mounts are 
more subject to causing security issues (and already have in the past 
nova releases).

However, there are a lot of potential cases when libguestfs won't be 
usable for data injection

This was the case here (fixed):
https://bugzilla.redhat.com/show_bug.cgi?id=984409

I entcountered a similar case more recently on powerkvm 2.1.0 (defect 
with the libguestfs)

So just saying it could be good adding a simple config flag (set to True 
by default, to keep the current behaviour untouched) to force nova not 
using libguestfs without having to uninstall it and thus prevent other 
users on the host from using it.

regards

raphael