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On 06/04/2015 06:18 PM, Devananda van der Veen wrote:
>
> On Jun 4, 2015 5:53 AM, "Dmitry Tantsur" <dtantsur at redhat.com
> <mailto:dtantsur at redhat.com>> wrote:
>  >
>  > Hi!
>  >
>  > While working on the enroll spec [1], I got a thinking: within the
> new state machine, when should we allow to change a node driver?
>  >
>  > My initial idea was to only allow driver change in ENROLL. Which
> sounds good to me, but then it will be impossible to change a driver
> after moving forward: we don't plan on having a way back to ENROLL from
> MANAGEABLE.
>  >
>  > What do you folks think we should do:
>  > 1. Leave driver field as it was before
>  > 2. Allow changing driver in ENROLL, do not allow later
>  > 3. Allow changing driver in ENROLL only, but create a way back from
> MANAGEABLE to ENROLL ("unmanage"??)
>  >
>
> What problem are you trying to solve? Because I don't see a problem with
> the current behavior, and you're proposing breaking the API and
> requiring users to follow a significantly more complex process should
> they need to change what driver is in use for a node, and preventing
> ever doing that while a workload is running...

I'm not trying to solve anything right now, I'm just wondering what the 
point of verification is, if we can change driver right in available 
state (and what the consequences of such change are).

I'm fine with answer #1 "do nothing" :)

>
> -Deva
>
>  > Cheers,
>  > Dmitry
>  >
>  > [1] https://review.openstack.org/#/c/179151
>  >
>  >
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