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compdemocracy / polis

:milky_way: Open Source AI for large scale open ended feedback
https://pol.is
GNU Affero General Public License v3.0
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Support auto-scaling #1398

Open metasoarous opened 2 years ago

metasoarous commented 2 years ago

Thanks to @geoah, we now are able to support scaling the server (see #1352). However, it's not clear that we'll be able to support auto-scaling through the current docker-compose setup.

If it's possible to support this via docker-compose with some additional configuration or documentation, that would be a great solution. There have been recent efforts by the docker team to make docker-compose into more of a production tool by deploying to various cloud providers coupled with docker swarm, so there may be some luck here.

But it's also not unlikely that using something like kubernetes would provide more flexibility/power, and may be worth doing even if we sort out how to accomplish it just with docker-compose.

NewJerseyStyle commented 2 years ago

As I know, all scaling feature is deprecated in docker-compose for years... So I don't think there is any magic that we can scaling out by simply adding some more docker-compose configurations.

Do it with something like Kubernetes, or create some load-balancers, distributed database and run docker-compose on each machine using the same set of load-balancers and distributed database with ssh manually (or automate it with ansible)

metasoarous commented 2 years ago

Hi @NewJerseyStyle; Thanks for commenting here.

As I know, all scaling feature is deprecated in docker-compose for years...

This may be true of ye old docker-compose, but the ecosystem is a little confusing right now, because there's also now docker compose built into docker, and this has now been set up to support deploying to AWS or other cloud providers (IIUC, via docker swarm). So I think it may be possible now, but haven't fully explored this yet, and it's unfortunately often confusing finding out of date information on docker-compose which doesn't necessarily apply to new features of docker compose.

metasoarous commented 2 years ago

That having been said, we do have a Draft PR with a Kubernetes setup: #1399.

I think we'll likely continue to support both options for the foreseeable future, since even if docker compose is able to auto-scale, it's much newer on the scene than Kubernetes, and I think is intentionally not as sophisticated (and so may be more appropriate in particular circumstances).

NewJerseyStyle commented 2 years ago

the ecosystem is a little confusing right now, because there's also now docker compose built into docker

Oh... I thought docker swarm was End-Of-Life something :see_no_evil:

metasoarous commented 2 years ago

As far as I can tell, it's still a thing. And actually, after poking at this for a short bit, it seems like most of the answers to "how to get docker compose to autoscale" is actually to look at docker swarm. It's still not totally clear to me how all the configuration actually fits together when using together, but that's the thread which can be pulled on here.

My sense is that docker compose with docker swarm will work for ~98% of the deploys out there, and have the advantage of being closer to the infrastructure being used in development. That having been said, if you're particularly keen on seeing Kubernetes support, you're welcome to help push that forward.

NewJerseyStyle commented 2 years ago

I always think Kubernetes is too heavy for small clusters to maintain (Myth?). I prefer docker swarm in this case.