Mounting named volumes doesn’t work in docker-compose files

[bggolding]

I believe this is a bug.

When docker-compose tries to mount a named volume, by default it prepends the project’s name to the volume, ie, a named volume “nexus-data” will be mounted as “project_nexus-data”. The direct docker command doesn’t prepend the project name so the two commands don’t access the same data. To make docker-compose use the unmodified name, it needs to be marked as an external container and its name specified.

Please provide a sample input docker run command

docker run -d -p 8081:8081 -p 5000:5000 --name nexus --restart=always -v nexus-data:/nexus-data sonatype/nexus3

What is the current output?*

version: '3.3'
services:
    nexus3:
        ports:
            - '8081:8081'
            - '5000:5000'
        container_name: nexus
        restart: always
        volumes:
            - 'nexus-data:/nexus-data'
        image: sonatype/nexus3

What is the expected/desired output?

version: '3.3'
services:
    nexus3:
        ports:
            - '8081:8081'
            - '5000:5000'
        container_name: nexus
        restart: always
        volumes:
            - 'nexus-data:/nexus-data'
        image: sonatype/nexus3

volumes:
    nexus-data:
        external:
            name: nexus-data