Slimming Telescope Feed-Discovery Docker Image

[raygervais]

What would you like to be added:

Recently, I had found https://github.com/docker-slim/docker-slim which claims to work with Node based Docker containers. If this were to work, it would improve both local and server storage requirements.

Furthermore, this may help the future plan of integrating Kubernetes clusters or moving to the cloud by reducing the storage costs of the various micro services.

[TDDR]

Related discussion #2683

[humphd]

Modified this to be about working on the feed-discovery service first, then we can add others once we have the process in place.

[TDDR]

Waiting on #2801

[TDDR]

I've spent a few hours looking at other repos and trying to figure out the best way to go about this. Seems like most repos are using this in their yaml file responsible for publishing, and that they do it on the build-and-push stage. Ex:

• https://github.com/invakid404/funtoo-bot/blob/deadcad126b6748535c6cab918d112c8c855b1b0/.github/workflows/publish.yml#L82
• https://github.com/webb-tools/dkg-substrate/blob/2226aca1c9aad769e9b751eab983cf9f13bc162e/.github/workflows/image-publish.yml#L26

I think in order to do this we would have to omit setup-buildx-action and implement docker-slim as our builder. I'm not sure of the consequences of that though.

Also, instead of downloading and installing slim through curl there is the option of pulling an image and having that run in our containers. Would we be able to pull that image into our registry and have it do it's thing in from there?

@humphd, @manekenpix your feed back would be appreciated

[humphd]

I don't want to stop using buildx, since it's what makes all of our caching work. Can you see if you can get this work with with buildx? A quick scan of their repo issues didn't seem to preclude using it, unless you are cross-compiling, which we don't.

[JerryHue]

@TDDR, do you think that we can make this for 2.9? I can move it to 3.0-alpha in the case we need to more discussion.

cc @humphd, @manekenpix

[humphd]

Moving to Alpha, I want @TDDR to focus on the deploy stuff.

[TDDR]

I don't think it's possible yet to use docker-slim as the building engine for buildx yet. slimtoolkit/slim#152

[humphd]

OK, thanks for looking into this. I don't want to move away from buildx, so let's leave this for when they do support it.

[humphd]

I don't think this is worth doing, now that we have better caching and our own registry in place.