How to create docker volume device/host path

Question

I believe there is an easy way to copy files into a docker volume that has already been mounted to a container.

docker cp /tmp/my_data/. my_container:/my_data

Answer 1

To bind volumes between container and host machine. The most easy way is to use volume mounting. With which we can setup your container before starting it, (its images, ports, ..etc)

To build the container from an image: docker-compose build To start the container : docker-compose up

Volumes key in the docker-compose file is used to set the binding. which means when we update the content of volumes in the container it will persist even after stopping the container.

We can bind volumes from a local dir or from a named docker volume see the exmple below

We can use COPY or ADD in your Dockerfile to make the content of your local diroctory available in the docker container.

read docs here

version: "3.2"
services:
  web:
    image: nginx:alpine
    ports:
      - "80:80"
    volumes:
      - type: volume
        source: mydata
        target: /data
        volume:
          nocopy: true
      - type: bind
        source: ./static
        target: /opt/app/static

    networks:
      webnet:

    volumes: