Ndtyjky

I'm trying to create a Dockerfile along with a docker-compose.yml file to run dotnet watch run on a multi project ASP.Net Core solution. The goal is to have a container watching for changes in all of the three projects.

My solution structure is this:

Nc.Application

Nc.Domain

Nc.Infrastructure

docker-compose.yml

Nc.Application contains the main project to run, and the other two folders are .Net standard projects referenced by the main project. Inside Nc.Application i have a folder, Docker, with my dockerfile.

Controllers

Docker

  Development.Dockerfile

Properties

Program.cs

Startup.cs

...

My Dockerfile and compose file contains the following:

Development.Dockerfile

FROM microsoft/dotnet:2.1-sdk AS build

ENTRYPOINT [ "dotnet", "watch", "run", "--no-restore", "--urls", "http://0.0.0.0:5000" ]

docker-compose.yml

version: '3'



services:



  nc.api:

    container_name: ncapi_dev

    image: ncapi:dev

    build:

      context: ./Nc.Application

      dockerfile: Docker/Development.Dockerfile

    volumes:

      - ncapi.volume:.

    ports:

      - "5000:5000"

      - "5001:5001"



volumes:

  ncapi.volume:

When i try to run docker-compose up i get the following error:

ERROR: for f6d811109779_ncapi_dev  Cannot create container for service nc.api: invalid volume specification: 'nc_ncapi.volume:.:rw': invalid mount config for type "volume": invalid mount path: '.' mount path

must be absolute



ERROR: for nc.api  Cannot create container for service nc.api: invalid volume specification: 'nc_ncapi.volume:.:rw': invalid mount config for type "volume": invalid mount path: '.' mount path must be absolute

ERROR: Encountered errors while bringing up the project.

I don't know what the path for the volume should be, as the idea is to create
a container not directly containing files, but watching files in a folder on my system.

Does anyone have any suggestions as to how to go about this?

You shouldn't mount things at the root of the container. Use another mount point like /app. Also, you don't need a named volume but a bind mount for this situation.

Make changes like this

Development.Dockerfile

FROM microsoft/dotnet:2.1-sdk AS build

WORKDIR /app

ENTRYPOINT [ "dotnet", "watch", "run", "--no-restore", "--urls", "http://0.0.0.0:5000" ]

docker-compose.yml

version: '3'



services:



  nc.api:

    container_name: ncapi_dev

    image: ncapi:dev

    build:

      context: ./Nc.Application

      dockerfile: Docker/Development.Dockerfile

    volumes:

      - ./:/app

    ports:

      - "5000:5000"

      - "5001:5001"