Pass argument to python script running in a docker container

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Suppose the following setup:

  • Website written in php / laravel
  • User uploads a file (either text / doc / pdf)
  • We have a docker container which contains a python script for converting text into a numpy array.

I want to take this uploaded data and pass it to the python script.

I can't find anything which explains how to pass dynamically generated inputs into a container.

Can this be done by executing a shell script from inside the laravel app which contains the uploaded file as a variable specified in the dockerfile's ENTRYPOINT?

Are there any other ways of doing this?

... a python script for ...

Just run it; don't package it into a Docker container. That's doubly true if its inputs and outputs are both local files, and it expects to do its thing and exit promptly: the filesystem isolation Docker provides works against you here.

This is, of course, technically possible. Depending on how exactly the support program container is set up, the "command" at the end of docker run will be visible to the Python script in sys.argv, like any other command-line options. You can use a docker run -v option to publish parts of the host's filesystem into the container. So you might be able to run something like

docker run --rm -v $PWD/files:/data \
  converter_image \
  python /data/in.txt /data/out.pkl

where all of the /data paths are in the container's private filesystem space.

There are two big caveats:

  1. The host paths in the docker run -v option are paths specifically on the physical host. If your HTTP service is also running in a container you need to know some host-system path you can write to that's also visible in your container filesystem.

  2. Running any docker command at all effectively requires root privileges. If any of the filenames or paths involved are dynamic, shell injection attacks can compromise your system. Be very careful with how you run this from a network-accessible script.

how to pass command line arguments to a python script running in , You cannot use -t and -d as you intend, as those are options for docker run . -t starts a terminal. -d starts the docker container as a daemon. This will run a container based on the alpine image and pass “ls” as an argument (which will effectively execute ls as alpine container will run a shell for you) and return the output as a sequence of bytes. The container will be removed after execution is complete.

One way to do this would be to upload the files to a directory to which the Docker container has access to and then poll the directory for new files using the Python script. You can access local directories from Docker containers using "bind mounts". Google something like "How to share data between a Docker container and host system" to read more about bind mount and sharing volumes.

Arguments and variables in Docker, How do I run a Python script in a Docker container? If you run a container using the above Dockerfile, at container start, ab script will get executed with the dummy-url as an argument. How To Run Custom Script Inside Docker. In this example, we have a custom shell script which accepts three command line arguments ($1, $2 & $3). If you pass true as the the first argument, the script will run in a infinite loop. Other two arguments are just to print the values.

Passing arguments to python script that is run from , How do you pass a command line argument in Python? You can easily pass command line arguments to a Python script. In this tutorial, we will help you to read the command line arguments in a Python script. Search for: Search

Pass argument to python script running in a docker container, I have 2 python scripts which I am planning to make images of and run them as containers. My docker-compose looks like version: “2” services:  It depends how the entrypoint was set up. If it was set up in “exec form” then you simply pass the arguments after the docker runcommand, like this: docker run image -a -b -c. If it was set up in “shell form” then you have to override the entrypoint, unfortunately. $ docker run --entrypoint echo image hihi.

Passing arguments to docker run, docker run python script jenkins docker run arguments how to pass jvm arguments to docker container python command line arguments docker run command  Some uses may be: to pass a value to one or more of your build steps, changing how things are run; another may be to bake a value into the image so that it’s accessible to both of your build steps and when it comes time to run the container. Runtime arguments are passed in when you `docker run` or start your container:

Assigning variables for python arguments : docker, A quick example on how to pass arguments to a python script running in a Dockerfile. The Python script: #!/usr/bin/python import sys  If you only need to run a simple script (with a single file), you can avoid writing a complete Dockerfile. In the examples below, assume you store in /usr/src/widget_app/, and you want to name the container my-first-python-script: Python 3: