If you need to copy files from a Docker Container to the Host, then you can do one of the following:
Option 1 – Using docker cp
Syntax:
docker cp [OPTIONS] CONTAINER: SRC_PATH DEST_PATH
Setup the container:
# pull the ubuntu image
docker pull ubuntu
# run the container locally
docker run -it -d ubuntu
# connect to the container
docker exec -it abcde123456 /bin/bash
Create a file from the container:
cd usr
cd share
touch some_file.txt
ls
Copy the file from the container to the host:
docker cp abcde123456:/usr/share/some_file.txt ./some_file.txt
ls
Option 2 – Using Docker Mounts
Syntax:
docker run -ti -v <host_directory>:<container_directory>
Perform the copy:
docker run -it -v $HOME/directory/some_container:/some_container --name some_container ruby bash
Option 3 – Using COPY in the Dockerfile
Syntax:
COPY <SRC> <DEST>
Create a Dockerfile with the COPY syntax:
FROM python
WORKDIR /var/www/
# Copy any resources required
COPY ./app.py /var/www/app.py
COPY ./requirements.txt /var/www/requirements.txt
RUN pip install -r /var/www/requirements.txt
ENTRYPOINT ["echo", "Hello from the container"]