On Wed, Mar 08, 2017 at 02:48:15PM +0000, Bogaert, Bart (Nokia - BE) wrote: > Hi, > > > If we pick the former, it will not be possible to configure a > > component with a system controlled parent (unless you also add the > > system controlled parent to the configuration). > > [Bart Bogaert] Is there a reason to only have this parent in the > > state tree and not in the config tree? > > I am not sure I understand the question. Suppose the config tree is > empty, and the system boots and populates the state tree with all > detected harwdare. Next, a client would like to pre-provision a > module in a chassis that exists in state. If the leafref is to the > config tree, the client would have to create both the chassis and the > module in the config tree, since the leafef would otherwise fail to validate. > > [Bart Bogaert] Ok, so you are looking for a solution that refers to an > entry in the state tree. I always thought that one could not refer > from config to state but it seems I misunderstood this since this is > exactly what you are proposing. > > > If we pick the latter you will not get any validation (since it has > > to be require-instance false). > > > > It is fine w/ me to change the type string to a leafref of the > > former > type. > > Correction: I am fine with changing the string to a leafref to state. > > > [Bart Bogaert] If we leave it as a string it would mean that an > > external application would have to check whether the value of the > > string actually corresponds to a component that should exist (in the > > case of a non-system-controlled parent)? > > So are you ok with a leafref to state? > > [Bart Bogaert] Since that seems possible this would solve the problem. > I'm checking this with our people.
Are you discussing leafref to a config false node with require instance false? I am not sure this is valid YANG. [Bart Bogaert] Well this is what I was thinking too but this was suggested by Martin. Regards, Bart /js -- Juergen Schoenwaelder Jacobs University Bremen gGmbH Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany Fax: +49 421 200 3103 <http://www.jacobs-university.de/>
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