How to copy image file from my desktop to docker container

Question

I have a profile page in my app which I am migrating to docker. I want to have a default profile picture for user who don't upload any picture for that I need to store that picture in my container.

I have my default profile pic stored at data/web/media/default.jpg and want it to copy to vol/web/media/default.jpg in my docker container.

I tried COPY but got this error

failed to solve: rpc error: code = Unknown desc = failed to compute cache key: "/data" not found: not found

My dockerfile:

FROM python:3.9-alpine3.13
LABEL maintainer="mRk"

ENV PYTHONUNBUFFERED 1

COPY ./requirements.txt /requirements.txt
COPY ./app /app
COPY ./scripts /scripts
COPY ./data /vol

WORKDIR /app
EXPOSE 8000

RUN python -m venv /py && \
    /py/bin/pip install --upgrade pip && \
    apk add --update --no-cache postgresql-client && \
    apk add --update --no-cache --virtual .tmp-deps \
        build-base postgresql-dev musl-dev linux-headers && \
    apk add --virtual build-deps gcc python3-dev musl-dev && \
    apk add jpeg-dev zlib-dev libjpeg && \
    pip install Pillow && \
    apk del build-deps && \
    /py/bin/pip install -r /requirements.txt && \
    apk del .tmp-deps && \
    adduser --disabled-password --no-create-home app && \
    mkdir -p /vol/web/static && \
    mkdir -p /vol/web/media && \
    cp ./data/web/media/default.jpg /vol/web/media/default.jpg && \
    chown -R app:app /vol && \
    chmod -R 755 /vol && \
    chmod -R +x /scripts

ENV PATH="/scripts:/py/bin:$PATH"

USER app

CMD ["run.sh"]

My docker-compose file:

version: "3.9"

services:
  app:
    build:
      context: .
    restart: always
    volumes:
      - static-data:/vol/web
    environment:
      - DB_HOST=db
      - DB_NAME=${DB_NAME}
      - DB_USER=${DB_USER}
      - DB_PASS=${DB_PASS}
      - SECRET_KEY=${SECRET_KEY}
      - ALLOWED_HOSTS=${ALLOWED_HOSTS}
      - EMAIL_USER=${EMAIL_USER}
      - EMAIL_PASS=${EMAIL_PASS}
    depends_on:
      - db

  db:
    image: postgres:13-alpine
    restart: always
    volumes:
      - postgres-data:/var/lib/postgresql/data
    environment:
      - POSTGRES_DB=${DB_NAME}
      - POSTGRES_USER=${DB_USER}
      - POSTGRES_PASSWORD=${DB_PASS}

  proxy:
    build:
      context: ./proxy
    restart: always
    depends_on:
      - app
    ports:
      - 80:8000
    volumes:
      - static-data:/vol/static

volumes:
  postgres-data:
  static-data:

Answer 1

This line isn't going to work since you set your WORKDIR to /app/ earlier.

cp ./data/web/media/default.jpg /vol/web/media/default.jpg && \

You have to change your working directory or use an absolute path

An other solution would be to put this line below the RUN command since you don't need to be in the /app/ directory to run it:

WORDIR = /app/

Answer 2

It looks like you try to copy something from the data dir:

cp ./data/web/media/default.jpg /vol/web/media/default.jpg && \

But this directory does not exist. However, you copied everything from the data dir on your host machine into your container dir vol on line:

COPY ./data /vol

That means, that all your files and dirs from data or copied into the vol dir in the container. So I geuss you do not need that line at all, as it is already in your container but in the vol directory.

Answer 3

You can use docker volumes which help you to copy and read files from docker

https://docs.docker.com/storage/volumes/