MSBuild failing to parse a valid compose file

[rbanks54]

When I try to build a .dcproj I've recently started seeing this error:

1>------ Build started: Project: docker-compose, Configuration: Debug Any CPU ------
1>C:\Program Files (x86)\Microsoft Visual Studio\Preview\Enterprise\MSBuild\Sdks\Microsoft.Docker.Sdk\build\Microsoft.VisualStudio.Docker.Compose.targets(294,5): error : (Line: 10, Col: 7, Idx: 156) - (Line: 10, Col: 7, Idx: 156): Expected 'MappingStart', got 'SequenceStart' (at Line: 10, Col: 7, Idx: 156).
1>Done building project "docker-compose.dcproj" -- FAILED.

The top part of the dockerfile is as follows:

version: '3.6'

services:
  mssql:
    image: microsoft/mssql-server-linux:2017-latest
    hostname: mssql
    environment:
      - ACCEPT_EULA=Y
      - SA_PASSWORD=${SA_Password}

Where the first element of the environment section is causing the problem.

The docker-compose.yml file is perfectly fine and everything works as expected using docker-compose up

P.S. I did recently install the latest 2.1.300-preview2-008533 dotnet core SDK, but I haven't uninstalled it yet to see if it is somehow causing the problem.

[stevejgordon]

I'm seeing the same issue on 2.1.300-preview2-008530 on windows. and Visual Studio 2017 15.7 preview 4.

[pellea]

Same error here with the latest VS2017 preview (15.7.0 preview 5).

[KevM]

I too had this problem. I was able to work around it by using the alternative environment notation:

  rabbitmq:
    image: "rabbitmq:3.6-management-alpine"
    platform: linux
    environment:
      RABBITMQ_ERLANG_COOKIE: "weeeeeeeeeeeeeeee"
      RABBITMQ_DEFAULT_USER: "rabbitmq"
      RABBITMQ_DEFAULT_PASS: "Password123!"
      RABBITMQ_DEFAULT_VHOST: "/"
    ports:
      - "15672:15672"
      - "5672:5672"

[pellea]

This notation isn't working for me. I already tested it and I got the same error.

[dbreshears]

Thanks for reporting. We are investigating the parsing issue in our tooling. I did find the alternative environment notation seemed to work as a workaround. @pellea, what is the error you see with the workaround?

[KevM]

Try the following. This works for me. I think the underscores are causing the problem.

  mssql:
    image: microsoft/mssql-server-linux:2017-latest
    platform: linux
    environment:
      "ACCEPT_EULA": "Y"
      "SA_PASSWORD": "${SA_Password}"

[haniamr]

@pellea one possible workaround you can try is to define those variables in docker-compose.override.yml instead and see if that works.

[pellea]

My bad, the workaround works.

I didn't remove the '-' before the line of each env key/value.

[stevejgordon]

I can confirm that the workaround works for me too.

[pysco68]

Same here, worked all fine until I installed VS 15.7.0 today. The notation from @KevM solved the issue.

[pitming]

Same problem here with 15.7.1.

Actually my docker-compose file is still in version 2 can that be the problem ?

will try the workaround

[veuncent]

Note: don't forget to put a space between keys and values:
Yes:

    environment:
      ASPNETCORE_ENVIRONMENT: Development

No:

    environment:
      ASPNETCORE_ENVIRONMENT:Development

[DinnyMN]

Running into this same issue but I am unsure how to convert nested variables into the working format.

    environment:
      - Mongo:Host=mongo
      - Mongo:Port=27017

Update: this worked after finding the right docs here

    environment:
      Mongo__Host: mongo
      Mongo__Port: 27017

[TroelsL]

Also ran into this issue after VS2017 automatically updated my project. This worked before:

environment:
      - VIRTUAL_HOST=devices.example.com
      - LETSENCRYPT_HOST=devices.example.com
      - LETSENCRYPT_EMAIL=me@example.com

Changing to this fixed it:

    environment:
      VIRTUAL_HOST: devices.example.com
      LETSENCRYPT_HOST: devices.example.com
      LETSENCRYPT_EMAIL: me@example.com

[prisar]

@haniamr removing

    environment:
      - ASPNETCORE_ENVIRONMENT=Development
      - ASPNETCORE_URLS=http://0.0.0.0:80

from docker-compose.yml worked for me. I kept it in docker-compose.override.yml also.

[haniamr]

@prisar thanks for the confirmation, I'll be closing this issue since the fix is already in the latest public version.

[hammypants]

@haniamr This is an issue in VS 15.9.6 when using the same valid format for build arguments.

Build:

4>------ Build started: Project: docker-compose, Configuration: Debug Any CPU ------
4>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\Sdks\Microsoft.Docker.Sdk\build\Microsoft.VisualStudio.Docker.Compose.targets(291,5): error : (Line: 11, Col: 9, Idx: 171) - (Line: 11, Col: 9, Idx: 171): Expected 'MappingStart', got 'SequenceStart' (at Line: 11, Col: 9, Idx: 171).
4>Done building project "docker-compose.dcproj" -- FAILED.

Severity	Code	Description	Project	File	Line	Suppression State
Error		(Line: 11, Col: 9, Idx: 171) - (Line: 11, Col: 9, Idx: 171): Expected 'MappingStart', got 'SequenceStart' (at Line: 11, Col: 9, Idx: 171).	docker-compose	C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\Sdks\Microsoft.Docker.Sdk\build\Microsoft.VisualStudio.Docker.Compose.targets	291	

In docker-compose.yml

services:
  web:
    image: web
    build:
      context: ./backend/src
      dockerfile: Web/Dockerfile
      target: final
      args:
        - BUILD_CONFIGURATION=Debug

The args part of the file does not support said format. I would expect to be able to use it.

Should I make this a new issue?