[ClusterLabs Developers] Validation of resource meta-attributes

[Oyvind Albrigtsen]

On 18/09/17 11:09 +0000, Ondrej Mular wrote:
>Hi all,
>
>during summit in Nuremberg, there was a discussion about improving
>usability. One of mentioned areas was validation of resource meta-
>attributes.
>
>There was an idea to have meta-attributes as element attributes of
>resource elements (primitive/group/clone/master/bundle) in CIB. With
>this approach meta-attributes will be validated directly against CIB
>scheme. But this idea was rejected right away because it doesn't work
>with meta-attributes used with rules.
>
>Maybe better way to solve this would be to do it in similar fashion as
>cluster properties. Pacemaker provides definition of cluster properties
>in same XML metadata format as resource-agents have.
>
>If we can obtain definition of meta-attributes metadata from pacemaker
>in similar format, then each CLI can validate meta-attributes against
>this definition and in GUI setting of them can be more user friendly.
>Also, we can take advantage of this format and put there some
>understandable description (maybe also name/label of meta-attribute)
>and much more. Actually, marx is working on some improvements of ocf
>XML metadata format so we can have more useful information for UIs.
>
>Currently, pcs doesn't do any validation of resource meta-attributes.
>We were thinking about some validation, but we will have to hardcode it
>into pcs and update it every time some changes happen in pacemaker.
>With metadata approach, change in definition would be sufficient.
>
>What is your opinion on this?
I think validation based on metadata definition would be the best way to do it.
>
>Ondrej
>
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