Why does my Docker composer not work with volume?

Question

I'm trying to create a volume to be shared among the containers, and this volume binds to a location of my host, the problem is that every time I run the docker-compose up gives the following error:

In file '. \ docker-compose.yml', service 'volumes' must be a mapping not an array.

and so far I didn't understand why. Following is the compose file:

version : '3.4'

services:
    testando-volume-compartilhado-a:
      image: carloshenriquecarniatto/teste:latest

    volumes:
       - D:\App:/app
    ports:
        - "10001:80"
        - "44378:443" 

Solution

It seems there is a spacing issue in your yaml

You should change the compose file to

version : '3.4'

services:
    testando-volume-compartilhado-a:
      image: carloshenriquecarniatto/teste:latest

    volumes:        
        - D:\App:/app  # <- extra space here
    ports:
        - "10001:80"
        - "44378:443" 

Comments

[Admin]

I have maked changes but not solved....

[Richard Slater]

The examples in Compose file version 3 reference seem to suggest that the hyphen is actually correct, i.e. it *should be a YAML list. It's possible here that the additional : in the Windows path is confusing the YAML parser? I know little to nothing about Docker Compose. Equally, it might be that the indentation is off, as in the D of volumes is indented by three, ports by four and image by two.

[Bruce Becker]

you're quite right @RichardSlater