Running a docker-compose "Getting Started" example causes "Invalid volume specification" on Windows

Question

I am absolutely new to Docker. I followed steps described in Docker Compose's "Getting Started" tutorial:

1. Install Docker Toolbox
2. Start Docker Quickstart Terminal
3. Add project files
4. Run docker-compose up command

And I got following error:

ERROR: for web  Cannot create container for service web: Invalid bind mount spec "D:\\Projects\\composetest:/code:rw": Invalid volume specification: 'D:\Projects\composetest:/code:rw' [31mERROR[0m: Encountered errors while bringing up the project. 

docker-compose.yml:

version: '2' services:   web:     build: .     ports:      - "5000:5000"     volumes:      - .:/code:rw   redis:     image: "redis:alpine" 

Project structure:

D:\Projects\composetest   ├── app.py   ├── docker-compose.yml   ├── Dockerfile   └── requirements.txt 

My configuration:

1. Windows 10 Single Language
2. Docker Toolbox 1.12.5

Why does it happen? Is there some workaround?

Answer 1

I found the solution. The problem was I didn't set the environment variable COMPOSE_CONVERT_WINDOWS_PATHS. It is described in the CLI variables doc.

So, if this problem exists, you should create new Windows environment variable called COMPOSE_CONVERT_WINDOWS_PATHS and set it to 1. Or you can create .env file in the path docker-compose.yml is placed with following content:

 COMPOSE_CONVERT_WINDOWS_PATHS=1 

It will solve this problem.