Docker Swarm in Engine: Overlay Network explanation

[BlaM]

I think the documentation page at https://docs.docker.com/engine/swarm/networking/ could be more precise about the fact that you HAVE TO create your own overlay network to use the service discovery feature.

As discussed in moby/moby#26993 was under the impression that - while I noticed that I have the option to create new overlay networks - Docker would give me a "default" overlay network (after all there was that ingress network). @sanimej has added some explanation to the documentation of ingress, but that would not have helped me as I was working through the "Getting Started" guide - and the ingress page does not seem to be part of that.

[londoncalling]

Labelling this as a good Hackathon issue. Step one will be making sure it's not already been addressed per more recent changes, but on a quick glance, I don't think so.

[johnharris85]

I'll take a look and claim this one :)

[JimGalasyn]

@johnharris85 What's the status on this? I'll need to put it back into the unclaimed pool if we don't see a PR in a couple of hours.

[johnharris85]

Sorry @JimGalasyn, will commit before I take off :) (should be in the next 30 mins).