ERROR: In file '.\docker-compose.yml', service must be a mapping, not a NoneType

[nwoodcl]

Type of issue

• [ x] Bug
• New feature
• Enhancement

Description

Following the documentation, went to fresh clone, scripts, build directory and ran docker-compose up
Get the error:
ERROR: In file '.\docker-compose.yml', service must be a mapping, not a NoneType
...

Steps to reproduce

1. [First step]
2. [Second step]
3. [and so on...]

Expected behavior

...

Current behavior <!-- The actual behavior observed --

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Known workarounds

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Possible solution

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Context and Environment

• Operating System: ...
• GitHub branch: ...
• .NET Runtime: ...

Code to reproduce the bug

using Xunit;

public class MyTest
{
    [Fact]
    public void TestToReproduceIssue()
    {
        // Arrange
        ...

        // Act
        ...

        // Assert
        ...
    }
}

[peterfelts]

I created a clean clone of the repo on my Windows box (Build 19042.685)

Docker -v
Docker version 20.10.2, build 2291f61

cd to the ...device-simulation-dotnet3\scripts\docker directory
docker-compose up

And the service started running.

I see the same error that you mentioned on Stack Overflow... perhaps this is a Docker version issue?

https://stackoverflow.com/questions/43452448/docker-compose-yml-service-must-be-a-mapping-not-a-nonetype

[peterfelts]

Closing this as I wasn't able to repro it and there hasn't been any activity. Please reactivate if you're still seeing this error.