CODEWITHSUNDEEP
dockercontainersmount
t_tia
t_tia

Reputation: 566

Mounted host file becomes a directory inside a docker container

I mount a host file into a docker container, and the mounted file becomes a directory inside the container. That's how I run it:

$ docker run --name <containername> -it -d -v /home/core/account_config.py:/code/account_config.py  <imagename>

Inside the container:

    # ls -la
    -rw-r--r--. 4 root root     0 Nov  6 10:25 __init__.py
    drwxr-xr-x. 2 root root  4096 Nov  6 10:59 account_config.py
    ....

The file (in the host file system) is still a perfectly ok python file.

The source code is added into /code during build. The corresponding line in my Dockerfile is:

ADD ./code /code

I want to be able to change the content of config file without rebuilding the image, so I want mount it later. What went wrong and how can I fix this?

Upvotes: 3

Views: 1595

Answers (2)

carter
carter

Reputation: 5432

If you want to be able to modify a file on the host machine and have changes reflect within a container, you should mount the volume via -v HOST_PATH:CONTAINER_PATH when you run the container.

Upvotes: 0

t_tia
t_tia

Reputation: 566

As it happens with (almost) every weird issue, turned out that this one has a very simple solution.

The path to host file contained a typo, so the docker automatically created a directory in this path, and mounted it to the container.

Upvotes: 2

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