new volume not pre-filled with ECS contexts.

[chrisbecke]

Description

It is established docker behavior that when docker creates a volume, if the folder in the image already contains files the volume is pre-populated with those files. When deploying services to an ECS context, volume creation behavior is not honored.

Steps to reproduce the issue:

1. Create a docker compose based off, e.g. a Minecraft image. Ensure the /server folder is mounted so that changes to configuration can be persisted.
2. Deploy the compose to ECS.

Describe the results you received:

The image does not start as the entrypoint cannot find the minecraft_server.jar file. The minecraft_server.jar file starts out in the /server folder, but as this folder is mounted, it is not present.

Describe the results you expected:

One of (in descending order of preference)
A. The contents of the folder to populate the created AWS::EFS::Filesystem object.
B. Docker compose to warn that the generated Filesystem will be empty, but the image is not.
C. The Documentation to call out this change from expected behaviour.

Output of docker-compose --version:

Docker Compose version v2.7.0

Output of docker version:

 Engine:
  Version:          20.10.17
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.17.11
  Git commit:       a89b842
  Built:            Mon Jun  6 23:01:23 2022
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.6.6
  GitCommit:        10c12954828e7c7c9b6e0ea9b0c02b01407d3ae1
 runc:
  Version:          1.1.2
  GitCommit:        v1.1.2-0-ga916309
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

Additional environment details (AWS ECS, Azure ACI, local, etc.):

AWS ECS

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[stale]

This issue has been automatically closed because it had not recent activity during the stale period.