How to install packages to docker's python?

Question

How to install packages to docker's python?

For example, I need lmxl. Inside django application in docker I run pip install lxml and terminal responses that requirement is already satisfied (because it's installed in OS X python 2.7 packages), but in fact it's not installed in docker's python packages.

So, how to apply pip install something to docker?

Answer 1

The correct way is to update the requirements.txt file of your project.

# requirements.txt
# .. other requirements
lxml

add the lxml dependencies to your Dockerfile after (RUN apt-get update .....)

RUN apt-get install -y python-dev libxml2-dev libxslt1-dev zlib1g-dev

now build and run. Using either

docker-compose build
docker-compose up

or

docker-compose up --build

Answer 2

There are many ways to install packages in docker but i prefer is to use docker file https://rominirani.com/docker-tutorial-series-writing-a-dockerfile-ce5746617cd#.q00am7bh3

https://www.digitalocean.com/community/tutorials/docker-explained-using-dockerfiles-to-automate-building-of-images

check out these links it might help you.

Answer 3

You would use Docker's docker-compose run --rm --service-ports web bash command. That will bring you to the command line of the container. Once there, you can run pip install lxml. After installation, just type exit, and you will exit the container used to the web container and remove it.

Here's the article on Docker run for reference: https://docs.docker.com/compose/reference/run/