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"devdatta kulkarni" <devdatta.kulkarni at rackspace.com> writes:

> Hi,
>
> I have been looking at Zuul for last few days and had a question
> about its intended role within Solum.
>
> From what I understand, Zuul is a code gating system.
>
> I have been wondering if code gating is something we are considering as a feature
> to be provided in Solum? If yes, then Zuul is a perfect fit.
> But if not, then we should discuss what benefits do we gain by using Zuul
> as an integral part of Solum.
>
> It feels to me that right now we are treating Zuul as a conduit for triggering job(s)
> that would do the following:
> - clone/download source
> - run tests
> - create a deployment unit (DU) if tests pass
> - upload DU to glance
> - trigger the DU deployment workflow
>
> In the language-pack working group we have talked about being able to do
> CI on the submitted code and building the DUs only after tests pass. 
> Now, there is a distinction between doing CI on merged code vs.
> doing it before code is permanently merged to master/stable branches.
> The latter is what a 'code gating' system does, and Zuul is a perfect fit for this.
> For the former though, using a code gating system is not be needed.
> We can achieve the former with an API endpoint, a queue,
> and a mechanism to trigger job(s) that perform above mentioned steps.
>
> I guess it comes down to Solum's vision. If the vision includes supporting, among other things, code gating
> to ensure that Solum-managed code is never broken, then Zuul is a perfect fit.
> Of course, in that situation we would want to ensure that the gating functionality is pluggable
> so that operators can have a choice of whether to use Zuul or something else.
> But if the vision is to be that part of an overall application lifecycle management flow which deals with
> creation and scaling of DUs/plans/assemblies but not necessarily be a code gate, then we should re-evaluate Zuul's role
> as an integral part of Solum.
>
> Thoughts?
>

Is Zuul tightly couple with launchpad? I see that most of the
information that it displays is coming from launchpad.

If it is, is it a good idea to force launchpad on users?

Regards,
Noorul