Missing documentation for `tasks.service-name` DNS discovery feature

[pandaxtc]

Is this a docs issue?

• [X] My issue is about the documentation content or website

Type of issue

Information is incorrect

Description

I couldn't find any documentation for the tasks.service-name discovery feature in the Docker Swarm documentation. A note about this feature was previously added in https://github.com/docker/docs/issues/5854 but is now gone.

This feature is extremely useful for services that use the VIP endpoint mode for ingress purposes but still need distinct internal IPs for clustering purposes (e.g. NATS), so it would be a good idea to document it.

Thanks!

Location

https://docs.docker.com/engine/network/drivers/overlay/#container-discovery

Suggestion

Add a sentence explaining the feature, either in the documentation about overlay networks (where the note was previously) or in the documentation about swarm networking.