[glue-wg] VOTE by 8/1: GLUE 2.1 for describing cloud resources?

[Salvatore Pinto]

Hi Maria,
since we are only adding new entities in the schema, I think it will be 
possible to perform the migration quite smoothly in 4 steps:

  1. Top-BDII & Site-BDII s to update schema to 2.1 (this can be done 
via an update of the BDII software in the UMD/EMI and will not distrupt 
anything)
  2. Site-BDII provider update to publish cloud info in both 2.0 and 2.1 
(this can be done in parallel with #1, since Top-BDIIs not already 
updated to 2.1 will just ignore the new 2.1 entities)
  3. When 1&2 are complete, update clients to consume 2.1 information 
(at the time, only AppDB is consuming this info, the new clients we are 
going to develop will be already based on at least a draft of 2.1)
  4. When 3 is complete, Site-BDII provider update to publish cloud info 
only in 2.1

Cheers,
   Salvatore.

On 29/07/2014 12:03, Maria Alandes Pradillo wrote:
> Dear Florido,
>
>>> The only problem I see if we go for a 2.1 version is that we need to
>>> understand how to deploy all this in the hierarchical BDII model.
>>> What happens if a site BDII hasn´t upgraded the schema to 2.1, it only
>>> understands 2.0, and it queries a cloud resource which supports 2.1?
>>> will it fail? Or will it fail to publish only those new entities that
>>> do not exist yet in 2.0? The same scenario goes for a 2.0 top BDII
>>> trying to query 2.1 site BDIIs. I guess until the whole grid hasn´t
>>> moved to 2.1 we may have some inconsistent things published around. I
>>> haven´t tested this so I´m not sure what happens when you want to
>>> publish something in LDAP that is not declared in the LDAP schema
>>> file.
>> It is not possible to add ldap entities to an LDAP database if these entities do no
>> refer to objects in the schema. In short, any BDII using the 2.0 schema will reject
>> all 2.1-specific objects, that is, the cloud stuff.
> OK, so this is going to be the case in the infrastructure until all resource, site and top BDIIs are updated to glue-schema 2.1.
>
> Regards,
> Maria
> _______________________________________________
> glue-wg mailing list
> glue-wg at ogf.org
> https://www.ogf.org/mailman/listinfo/glue-wg


-- 
Salvatore Pinto
Cloud Technologist, EGI.eu
e-mail: salvatore.pinto at egi.eu
skype: salvatore.pinto0
Science Park 140, Amsterdam, The Netherlands