[openstack-dev] [stable] New config options, no default change

Daniel P. Berrange berrange at redhat.com
Tue Nov 11 10:30:53 UTC 2014

On Tue, Nov 11, 2014 at 10:24:41AM +0000, Dave Walker wrote:
> Hi,
> Looking at a stable/juno cinder proposed change[0], I came across one
> that introduces a new config option.
> The default is a noop change for the behaviour, so no bad surprises on upgrade.
> These sort of changes feel like they are outside the 'no config
> changes' rule, but we have not really discussed this.
> What do others think?

I don't think "no config changes" is a completely black & white rule.
The most important part of it is that you don't change the semantics
or default values of any existing config options in stable, because
that would cause a change in behaviour for existing deployments who

If backporting a bug fix involves adding a new config parameter I
think that's broadly acceptable, provided the config option does
not result in a change in behaviour upon upgrade that violates the
stable tree requirements.

|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|

More information about the OpenStack-dev mailing list