Cannot mount file as a volume in docker-compose after weekends, why?

Question

Today i got new error in my docker-environment. I just started my project (Web, Php and Postgres Containers), but Nginx container dont started, because the site.conf, which i mount with volumes is a "directory".

Last friday it was ok and worked nice for me. I dont change anything in this case. ;(

I created extra docker-compose file, where you can try to reproduce my error.

docker-compose File:

version: "3"

services:
  nginx:
    container_name: nginxCr
    image: nginx:1.15.7
    ports:
      - "80:80"
    volumes:
      - .:/var/www
      - ./site.conf:/etc/nginx/conf.d/site.conf

site.conf can be empty for testing.

after docker-compose up -d Container is not running.

docker logs nginxCr provides following:

2019/03/04 14:49:25 [crit] 1#1: pread() "/etc/nginx/conf.d/site.conf" failed (21: Is a directory) nginx: [crit] pread() "/etc/nginx/conf.d/site.conf" failed (21: Is a directory)

Somehow start the docker (docker compose) to creating directory instead of linking my config file.

I have Windows 10 Pro (Build 17134)

Docker version 18.09.2, build 6247962

docker-compose version 1.23.2, build 1110ad01

UPDATE: Problem seems to be Windows only... on my Nix-Server it works fine

Answer 1

the solution was to uncheck -> apply

and then

check -> apply the Harddrive in "Shared Drivers" in Docker-Settings

*facepalm*

Answer 2

Keep your www files in a sperate folder instead of . . Have a compose file like below:

services:
  nginx:
    container_name: nginxCr
    image: nginx:1.15.7
    ports:
      - "80:80"
    volumes:
      - ./www:/var/www
      - ./site.conf:/etc/nginx/conf.d/site.conf

So, in your Present working Dir you should have a folder called www (so that you don't have to merge volumes) and a file called site.conf . Even if it is an empty file, you should have it in your directory. Otherwise, docker will create a folder in that name.

In case if you have a folder called site.conf , delete that folder and do touch site.conf , then do docker-compose up -d