[Buildbot-devel] Is it possible to deploy buildbot to google app engine
macke at yar.nu
Wed Dec 30 10:39:45 UTC 2009
On 2009-12-30 11:27, Dustin Sallings wrote:
> On Dec 30, 2009, at 2:17, Marcus Lindblom wrote:
>> I think it'd be awesomely cool to run buildbot instances on GAE, but
>> that would, as I said, require ripping out quite a bit of the
>> entrails and re-jigger them into something new, that doesn't store
>> any state in memory for more than the lifetime of the request.
>> The current pickle-system might work on GAE, but we need to
>> pickle/unpickle a lot (probably too much) on each request. Brian's DB
>> work would not be applicable, unless it also abstracts the backend
>> store so much that a non-RDB store is feasible.
> There's pretty much no part of GAE that could do proper scheduling of
> builders. The slaves would all have to be polling it or something --
> or every slave would have to be internet addressable. That would be
> an unfortunate loss of functionality either way.
Right. Forgot about that direction.
> XMPP might be a middle man, but XMPP as available to GAE is
> excessively limited.
If we don't worry about efficiency too much, does it need to be more
than sending a notification to the slave that new orders are available
on the master?
>>> I made a webhook status notifier and made an excessively simple, but
>>> event-driven UI here:
>>> source code is here:
>>> I'd love to see that be touched by someone who knows how to make UIs
>>> that make sense. :)
>> Interesting work. Does it poll the build-masters regularly to update
>> the info?
> I despise polling. :)
As do I. :)
> It updates as build builders arrive, and as builds and steps start and
> finish. The only polling that exists at all is people with web
> browsers hitting it.
Ah, so you have a notifer on the buildmaster that pushes changes. That
>> Building a web-only-interface for buildbot on GAE should be easy
>> (if/when we have a HTTP-interface to the DB) and would off-load some
>> work from the master, so that it could focus on controlling the
>> slaves and storing results. But, running the entire buildmaster on
>> GAE would be even cooler. The way GAE scales would make it attractive
>> to run really large build masters on, handling 100s or thousands of
> GAE scales in a way that is in conflict with things that aren't web
> services for the most part.
Well, in my mind BuildBot _is_ mostly a web service (except for the
continous log output streaming and with some data-push from the server)
but I might not have the right picture of it.
It seems to me as it's mostly well defined discrete events going back
and forth. I suppose where it breaks down is where the master notifies
When will a http-push technique be available? It seems as with all the
AJAX, RSS and similar stuff going on today, there's way too much polling
going on everywhere.
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