Is the original file kept in the container?

Question

Docker

Hello everyone,

while building the image with the docker build command, 2 files are pulled into it, in the Dockerfile, for example, with the commands

COPY conf /etc/clamav
RUN curl -o file.txt http://X.X.X.X/path/to/file/file.txt

while the container is running, these files can be updated by the processes in the container.

1) Correct, do I understand that the original versions of the files are still stored in the upper layers of the container's file system?

2) Can a process in a container access them?

all the best,
Vadim

Answer 1

1. Remain in the bottom (the image is a typical stack / pyramid, the layers are superimposed on top of the base), if they were there
   
2. It is impossible without mounting from the host, because they are not in the top layer