Re: [netmod] Schema Mount with Inline Type
Ladislav Lhotka <lhotka@nic.cz> Fri, 04 January 2019 12:51 UTC
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From: Ladislav Lhotka <lhotka@nic.cz>
To: Rohit R Ranade <rohitrranade@huawei.com>, "netmod@ietf.org" <netmod@ietf.org>
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Date: Fri, 04 Jan 2019 13:51:34 +0100
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Subject: Re: [netmod] Schema Mount with Inline Type
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Rohit R Ranade <rohitrranade@huawei.com> writes: > Hi, > > I donot have a specific scenario as of now. But the scenario used in the draft is that a module which is mounted needs to refer to its parent-schema. I donot see how that is related to "mount point instances having shared-schema or different schema". > > If we look at the LNE draft, I think it avoids the "parent-reference" > by having a " bind-lne-name" which binds the interface to the LNE and > also creates a "system" configuration for that interface inside the > LNE instance. So the interface references inside the mount jail get > resolved. If I understand it correctly (maybe not), the "bind-lne-name" is used at the level of Network Device to assign an interface to a configured LNE. This information IMO is not meaningful inside the LNE itself. If it is so, there is in fact no parent reference. > > So in future, if "inlined" schema needs to use parent-schema, it needs > to use a "bind" mechanism to add entries from the module in > parent-schema to the same module under mount-point ? In my view, the inline case makes only sense in the split management scenario where each mount jail is managed via a separate NC/RC server. In this case it makes no sense to refer to data outside the mount jail. My standard complaint is that schema mount mixes up two rather different concepts: the shared-schema case is a data modelling concept whereas the inline case is more about combining instance data. This causes a lot of complexity and confusion. Lada > > > -----Original Message----- > From: Ladislav Lhotka [mailto:lhotka@nic.cz] > Sent: 02 January 2019 19:29 > To: Rohit R Ranade <rohitrranade@huawei.com>; netmod@ietf.org > Subject: Re: [netmod] Schema Mount with Inline Type > > Hi Rohit, > > Rohit R Ranade <rohitrranade@huawei.com> writes: > >> Hi All, >> >> module: ietf-yang-schema-mount >> +--ro schema-mounts >> +--ro namespace* [prefix] >> | +--ro prefix yang:yang-identifier >> | +--ro uri? inet:uri >> +--ro mount-point* [module label] >> +--ro module yang:yang-identifier >> +--ro label yang:yang-identifier >> +--ro config? boolean >> +--ro (schema-ref) >> +--:(inline) >> | +--ro inline! >> +--:(shared-schema) >> +--ro shared-schema! >> +--ro parent-reference* yang:xpath1.0 >> >> Any reason for not adding "parent-reference" for "inline" type ? What >> is the solution for the modules defined under such mount points to >> refer to parent schema ? > > The inline case was intentionally designed with an impenetrable "mount jail". Do you see any use case where parent references are needed and the "shared-schema" strategy cannot be used? > > Lada > >> >> With Regards, >> Rohit >> _______________________________________________ >> netmod mailing list >> netmod@ietf.org >> https://www.ietf.org/mailman/listinfo/netmod > > -- > Ladislav Lhotka > Head, CZ.NIC Labs > PGP Key ID: 0xB8F92B08A9F76C67 -- Ladislav Lhotka Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67
- [netmod] Schema Mount with Inline Type Rohit R Ranade
- Re: [netmod] Schema Mount with Inline Type Ladislav Lhotka
- Re: [netmod] Schema Mount with Inline Type Rohit R Ranade
- Re: [netmod] Schema Mount with Inline Type Ladislav Lhotka
- Re: [netmod] Schema Mount with Inline Type Rohit R Ranade