Compose does not support 'configs' configuration with v3.3

[MrHash]

Docker version 17.07.0-ce-rc2, build 36ce605
docker-compose version 1.15.0, build e12f3b9

sample config

version: "3.3"
configs:
  config.yml:
    file: ../config/config.yml
services:
  php:
    image: php:7.1-fpm
    configs:
      - source: config.yml
        target: /configs/config.yml

returns
WARNING: Some services (php) use the 'configs' key, which will be ignored. Compose does not support 'configs' configuration - use docker stack deploy to deploy to a swarm.

[shin-]

What is your question?

[MrHash]

According to the documentation this should be supported: https://docs.docker.com/compose/compose-file/#short-syntax

So what is the correct solution to using configs in docker-compose v3.3? I am unable to deploy a stack (or is it a swarm) without completely redesigning compose files and this is a massive headache compared to the functionality of the previous minor release.

[shin-]

Configs are only used when you deploy on Swarm mode using docker stack deploy. Compose recognizes the option as valid, but does not use the section as it is a feature only available for Swarm mode services / stacks.

HTH

[MrHash]

Does the same apply to secrets now?

[shin-]

We went with a compromise for the secrets implementation, see #4994 for details.

[grikdotnet]

Looks like documentation is written in a science-fiction manner.

[teodorescuserban]

I wish a compromise would also be taken for extends (see moby/moby#31101).

[3ynm]

This only confuses people. There's no reason why docker-compose supports secrets but not configs, since both can be implemented the same way. At least are you accepting PR for this?

[shin-]

@HACKTIVISTA We don't want to commit to continued support for configs once the feature starts diverging from secrets, so it'll have to stay a Swarm-exclusive feature. Sorry.

[jacobsvante]

@shin- I don't understand this. Can you please explain?

[Mobe91]

Also just hit this issue. It is not obvious to me why docker-compose supports secrets but not configs. Especially for running swarm stacks locally via compose it would be nice to support this.