How to install python and other pre-requisites for node-red-contrib-machine-learning-v2 on a docker container

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I need to install these dependencies in advance, I am using docker to install nodered, how to install these dependencies, is there an easy way.
thanks！

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Is this a duplicate of How to install the required dependencies ?

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node-red-contrib-machine-learning-v2 (node) - Node-RED

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Hi @lei1 this is not really node-red question & this not a docker forum.

Your options are (as far i can see)...

  • ask on stackoverlfow or a docker forum
  • learn how to create custom images.
  • give up on docker and install to the OS
  • wait and hope someone will come along and be nice enough & competent to help with this non-node-red question

PS, this is a duplicate thread. Please dont double post.

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@Steve-Mcl I don't think it is unreasonable to ask for help installing Node-RED node in the Node-RED provided docker image. This is not a 'non-node-red' question.

@lei1 this is definitely an area our docs don't provide a lot of help with, so it does currently require a good knowledge of Docker and how to build containers.
I can't give you some immediate help on it right now... but I've asked someone who knows more Docker than I do to take a look and respond to your question.

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Ok, my apologies, I considered this non node-red as it was an issue particular to a contrib node with pre-reqs outside of the core node-red setup.

Noted for future :+1

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thank you so much

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Hi @lei1

I have a blog post I've been working on but it's not quite ready to publish just yet, but here is section of it that I hope should help.

As well as the pre-built containers the node-red-docker project on github also contains the Dockerfile and scripts to build a version of the Node-RED Docker container based on the Debian Linux distribution. This uses the normal glibc library and also being a mainstream Linux distribution it is more likely to be used as the basis for instructions for install many libraries and pre-requisites for NodeJS nodes.

You can build the container locally by running the following commands:

$ git clone https://github.com/node-red/node-red-docker.git
$ cd node-red-docker /docker-custom
$ ./docker-debian.sh

This will build a container image called testing:node-red-build by default and which can be run as follows:

$ docker run -d -p 1880:1880 -v node_red_data:/data --name myNRtest testing:node-red-build

Now you have a debian based container it can either be used as the base for a new Dockerfile which can be used to add in any prerequisite libraries or applications.

For example to install the prerequisite libraries for node-red-contrib-machine-learning node the following Dockerfile will extend the output of the previous command and add the required python libraries.

FROM testing:node-red-build
USER root
RUN apt-get install -y python3-pip python3-numpy python3-pandas 
RUN pip install scikit-learn tensorflow
USER node-red

Another approach would be to edit the Dockerfile.debian found in the docker-custom directory mentioned earlier.

...
COPY --from=build /usr/src/node-red/prod_node_modules ./node_modules
# Chown, install devtools & Clean up

RUN chown -R node-red:root /usr/src/node-red && \
    apt-get update && apt-get install -y build-essential python-dev python3 \ 
    python3-pip python3-numpy python3-pandas && \
    pip install scikit-learn tensorflow && \
    rm -r /tmp/*
USER node-red
...
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Thank you very much for your help, it was so useful for me, thank you!