[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:
> Looking at a stable/juno cinder proposed change, 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.
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