Open Stack

Thanks folks for the interesting suggestions on this topic!  I’ll b updating the BP this week with this and other info i am gathering. 

Please let me know if you are interested in being involved in brainstorming on this issue and I will set up an irc meeting to discuss it further

On Nov 11, 2013, at 3:08 PM, Mark McLoughlin <markmc at redhat.com> wrote:

> Hi Nikola,
> 
> On Mon, 2013-11-11 at 12:44 +0100, Nikola Đipanov wrote:
>> Hey all,
>> 
>> During the summit session on the the VMWare driver roadmap, a topic of
>> validating the passed configuration prior to starting services came up
>> (see [1] for more detail on how it's connected to that specific topic).
>> 
>> Several ideas were thrown around during the session mostly documented in
>> [1].
>> 
>> There are a few more cases when something like this could be useful (see
>> bug [2] and related patch [3]), and I was wondering if a slightly
>> different approach might be useful. For example use an already existing
>> validation hook in the service class [4] to call into a validation
>> framework that will potentially stop the service with proper
>> logging/notifications. The obvious benefit would be that there is no
>> pre-run required from the user, and the danger of running a
>> misconfigured stack is smaller.
> 
> One thing worth trying would be to encode the validation rules in the
> config option declaration.
> 
> Some rules could be straightforward, like:
> 
> opts = [
>  StrOpt('foo_url',
>         validate_rule=cfg.MatchesRegexp('(git|http)://')),
> ]
> 
> but the rule you describe is more complex e.g.
> 
> def validate_proxy_url(conf, group, key, value):
>    if not conf.vnc_enabled:
>        return
>    if conf.ssl_only and value.startswith("http://"):
>        raise ValueError('ssl_only option detected, but ...')
> 
> opts = [
>  StrOpt('novncproxy_base_url',
>         validate_rule=validate_proxy_url),
>  ...
> ]
> 
> I'm not sure I love this yet, but it's worth experimenting with.
> 
> Mark.
> 
> 
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20131112/cc1809e2/attachment.html>