Docker container can't mount folder

Question

I am working on an application. Using NodeJS for language and docker docker-compose for deployment.

I have an endpoint for uploading files. When i upload a file application keeps it at the "files" folder (files folder is at the root of the project). When container restarts i dont want to loose files, so i created a volume named "myfiles" and mounted it to "/files" path.

But when i check the myfiles volume path i dont see any of the created files by api. And if i restart the container uploaded files disappears.

Here is my docker-compose.yaml file for api

version: '3.1'

services:
  api:
    image: api-image
    restart: always
    volumes:
      - myfiles:/files
volumes:
  myfiles:

After docker-compose up -d i upload some files and see them in container by calling

docker exec -it container_name ls files node_modules package.json index.js package-lock.json src

docker exec -it container_name ls files d5a3455a39d8185153308332ca050ad8.png

Files created succesfully.

I checked if container mounts correctly by docker inspect container_name and result:

"Mounts": [
        {
            "Type": "bind",
            "Source": "/var/lib/docker/volumes/myfiles/_data",
            "Destination": "/files",
            "Mode": "rw",
            "RW": true,
            "Propagation": "rslave"
        }
    ]

Answer 1

You are creating volume, you are not using folder. Try to use folder myfiles from current directory:

version: '3.1'

services:
  api:
    image: api-image
    restart: always
    volumes:
      - ./myfiles:/files