ExtensionVM does not resolve containers in a composefile

[hguerrero]

Describe the bug When trying to execute commands using the CLI in the VM using a compose file, the exec call tries to run the command into the compose grouping name and there is no way to access a specific container in the compose group.

Add the steps to reproduce Steps to reproduce the behavior:

1. Create an extension that uses more than 2 containers through compose file
2. Try to execute any command with ddClient.extension.vm?.cli.exec
3. See the error message in the debug window

Describe the expected behavior There should be a way to get into any of the containers of the compose group and execute the command in that container.

Output of docker extension version:

Client Version: v0.2.4
Server API Version: 0.2.3

Output of docker version:

Client: Docker Engine - Community
 Cloud integration: v1.0.25
 Version:           20.10.16
 API version:       1.41
 Go version:        go1.17.10
 Git commit:        aa7e414
 Built:             Thu May 12 09:17:39 2022
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Desktop
 Engine:
  Version:          20.10.16
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.17.10
  Git commit:       f756502
  Built:            Thu May 12 09:15:42 2022
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.6.4
  GitCommit:        212e8b6fa2f44b9c21b2798135fc6fb7c53efc16
 runc:
  Version:          1.1.1
  GitCommit:        v1.1.1-0-g52de29d
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

Additional context Using WSL2 in Windows 10

[benja-M-1]

Hi @hguerrero sorry for the delay, do you still see the issue? Would you mind sharing the error message you see?

[gtardif]

Effectively for the sake of simplicity when creating this API, we arbitrarily choose to focus on the "single container" scenario for the CLI command execution, and we try to execute commands in container corresponding to the first compose service in the list. It should be also possible to reorder services in the compose file in order to execute commands in it if you have several containers, but one specific to have commands execution triggered by the front end. We need to specify this in our docs, until we improve the API to allow selecting a container.