init Additional property init is not allowed

[acca301]

Trying to deploy a stack with Docker 17.06.2-ce

A service is having 'init:' property set:

version: "3.1"
services:
  dummy:
    image: hello-world
    init: true

Getting an error:

$ docker stack deploy -c dummy.yml dummy
init Additional property init is not allowed

The 'init:' option had been introduced in version 2.2 of 'docker-compose' format. Any clue would be greatly appreciated.

[tianon]

Is the init: option supported by docker stack deploy? Does your example file work with docker-compose?

I found init: listed under https://docs.docker.com/compose/compose-file/compose-file-v2/#init (in the 2.2 file format reference), but not under the v3 reference, so perhaps it was removed in v3? (likely due to not being supported for services under Swarm Mode -- see moby/moby#25303, where it appears moby/swarmkit#2350 was merged in swarmkit, but still pending for CLI in docker/cli#51 and/or moby/moby#34529)

[tianon]

Additionally, in the future, it'd be better to post questions like this in the Docker Community Forums, the Docker Community Slack, or on Stack Overflow. Thanks!

[thaJeztah]

Compose file support was implemented in docker/cli#1129, and completes a long chain of PR's to implement this feature 🎉