I currently have a Python application running in a Docker container on Ubuntu 20.04.
In this Python application I want to create a text file every few minutes for use in other applications on the Ubuntu server. However, I am finding it challenging to create a file and save it on the server from inside a containerised Python application.
The application Dockerfile/start.sh/main.py files reside in /var/www/my_app_name/ and I would like to have the output.txt file that main.py creates in that same folder, the location of the Dockerfile/main.py source.
The text file is created in Python using a simple line:
text_file = open("my_text_file.txt", "wt")
I have seen that the best way to do this is to use a volume. My current docker run which is called by batch script start.sh includes the line:
docker run -d --name=${app} -v $PWD:/app ${app}
However I am not having much luck and the file is not created in the working directory where main.py resides.