Re: Non-image blocker process change proposal

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> Up top I'd like to note there are really kind of two buckets of
> 'special blockers' for any given release. If the release being
> validated is N, they are:
> 
> 1) Bugs for which the fix must be in the 0-day update set for N
> 2) Bugs for which the fix must be stable in N-1 and N-2 by N release day

Hello folks,

I'd like to return to the high-level overview for this topic and discuss the changes we plan to do in our SOPs. 

So far, we decided to call bugs from bucket 1) as Accepted0Day and bugs from bucket 2) as AcceptedPreviousRelease. I also worked on some technical details for ensuring AcceptedPreviousRelease updates get pushed on time. Now we need to discuss what *happens* when we have one of these two bugs.


== Question #1: Do we slip always? ==

With media blockers, we need to create new media, which ensures a slip (there were a few exceptional situations in the past where we managed to build and test fixed media in a day, and therefore postponed the Go/NoGo decision for a day). With non-media blockers, the affected artifact is either the repository tree (we need to push a new build for Accepted0Day), or a previous release repository tree (we need to push an update for AcceptedPreviousRelease). For Accepted0Day, this will most likely involve critical bugs in components which are not on the default installation media (but for example negatively influence them, or prevent some other important functionality). For AcceptedPreviousRelease, this will most likely involve bugs in upgrading the system, or a few other specific cases like creating a bootable media of the new release or booting the new release in a VM.

Now the question is whether exactly the same rules apply (i.e. if this is not fixed at go/no-go, we slip), or whether in certain cases we would decide to not slip.

Since pushing an update can be done relatively fast, I can imagine that people would propose to not slip if an update is prepared and tested, but not yet pushed stable. Earlier in this thread, I tried to point out that this is not enough, because things can go wrong on multiple levels and we really need to insist that update is already stable (and metalink metadata adjusted to not allow usage of older pushes). Of course this can be handled with the same trick as media blockers sometimes, i.e. postponing the Go/NoGo decision for a day, provided RelEng approves. But in general I think we should not avoid slipping and just "hope for the best". These bugs were accepted as blockers and we need to make sure people don't hit them, even if they have a bad luck of being assigned to an older mirror.

Do you see any other cases where we should either not slip, or it would be tempting to not slip and we should discuss and define such use case explicitly?


== Question #2: For how long do we slip? ==

Earlier in this thread, I suggested some kind of a dynamic slip that would reflect how fast we can resolve things (for example perform a push). But both Kevin from Infra and Dennis from RelEng didn't think it was a good idea, and claimed we should slip as usual, i.e. a week (if I misunderstood something, please correct me). Of course this is their field, not QA's, so I definitely believe their judgment.

Do you have some other ideas/proposals, in general or in some specific situations regarding the slip length?


Thanks a lot for feedback,
Kamil
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