[openstack-dev] [Trove] Pluggable conductor manager

Russell Bryant rbryant at redhat.com
Mon Jun 2 20:55:09 UTC 2014

On 06/02/2014 09:23 AM, boden wrote:
> On 4/28/2014 2:58 PM, Dan Smith wrote:
>>> I'd like to propose the ability to support a pluggable trove conductor
>>> manager. Currently the trove conductor manager is hard-coded [1][2] and
>>> thus is always 'trove.conductor.manager.Manager'. I'd like to see this
>>> conductor manager class be pluggable like nova does [3].
>> Note that most of us don't like this and we're generally trying to get
>> rid of these sorts of things. I actually didn't realize that
>> conductor.manager was exposed in the CONF, and was probably just done to
>> mirror other similar settings.
>> Making arbitrary classes pluggable like this without a structured and
>> stable API is really just asking for trouble when people think it's a
>> pluggable interface.
>> So, you might not want to use "because nova does it" as a reason to add
>> it to trove like this :)
>> --Dan
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>> OpenStack-dev mailing list
>> OpenStack-dev at lists.openstack.org
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> Thanks for the input Dan.
> Is the real concern here that the conductor API(s) and manager are
> coupled based on version?

FWIW, I really don't like this either.

I snipped some implementation detail proposals here.  I missed why you
want to do this in the first place.  This seems far from an obvious plug
point to me.

Russell Bryant

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