Robert Citek rwcitek

This is a collection of bash commands that builds a Python binary for a specific Linux environment using Docker. Environment variables are used to set default values, e.g. Python version and compile options. Using those environment variables, a HERE-DOC command creates a Dockerfile. Docker then uses the Dockerfile to build the Python binary within a Docker image.

To see what the latest Python version is, visit https://www.python.org/ftp/python/.

set environment variables ( optional )

Only if you want to use something different from the defaults.

This file shows how one can configure a Docker instance to create a serverless function on Digital Ocean. Rather than running doctl auth init ... to set up a config.yaml file that holds the API token, the container exec command passes in an environment variable that contains the token. In that way, the container never has the token on persistent storage. That means the instance could be committed to an image without having credentials in the image. It also means the commands in the Here-Doc could be used as as a template to create a Dockerfile in the future.

From DO function docs

Create a Docker container

From https://www.mongodb.com/community/forums/t/installing-mongodb-over-ubuntu-22-04/159931/87

These commands were run using the bash shell on Debian 11 in the Linuv Dev Env on a Chromebook.

Make sure no mongodb instances exist

docker container stop mongodb ; docker container rm mongodb ; sleep 2

Run an Ubuntu 22.04 container in the background

	# adapted from: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-22-04
	## This allows a Docker container to connect to the Docker server on the host to manage Docker resources

	# run a Docker instance in the background
	docker container run \
	--rm \
	-v /var/run/docker.sock:/var/run/docker.sock \
	--name dood \
	ubuntu:22.04 sleep inf &

	# This gist combines specific commits from two different repos: jekyll-and-slide and reveal.js
	# - https://github.com/adamhollett/jekyll-and-slide
	# - https://github.com/hakimel/reveal.js
	# If there was a way to do this from the browser, this gist would be unnecessary.

	# prerequisite: an existing repo in GitHub, no branch named "gh-pages", and note repo URL
	REMOTE_URL='https://github.com/sluugdemogithub/demo03.git'

	# create the URL for GitHub Pages
	<<< "$REMOTE_URL" IFS='/' read scheme x host id repo

	temp=$(date +%s)

	cat <<'eof' > Dockerfile.${temp}

	FROM ubuntu:24.04
	ARG DEBIAN_FRONTEND=noninteractive
	SHELL ["/bin/bash", "-c"]

	# install the basics
	RUN apt-get update && \

	# These commands were run using the bash shell on Debian 11 in the Linuv Dev Env on a Chromebook

	# make sure no haskell instances exist
	docker container stop haskell ; docker container rm haskell ; sleep 2

	# run an Ubuntu container in the background
	docker container run -d --name haskell ubuntu:22.04 sleep inf

	# install utilities and haskell
	<<'eof' docker container exec -i haskell /bin/bash

	# Using a shell pipeline of awk, bc, sort, head in Docker with the Alpine image

	<<'eof' docker container run --rm -i alpine

	{ cat <<'eof2'
	1000
	2000
	3000

	4000

	# This should be turned into a multi-stage Dockerfile

	docker container stop build_haskell ; docker container rm build_haskell ; sleep 1

	docker container run -d --name build_haskell ubuntu:20.04 sleep inf

	<<'eof' docker container exec -i -w /tmp/ build_haskell /bin/bash
	export DEBIAN_FRONTEND=noninteractive
	apt-get update
	apt-get install -y vim tree jq file wget gcc g++ make xz-utils curl

	# From: https://www.simplilearn.com/tutorials/docker-tutorial/raspberry-pi-docker

	curl -fsSL https://get.docker.com -o get-docker.sh

	sudo sh get-docker.sh

	sudo usermod -aG docker ${USER}
	exec sudo su - ${USER}

	docker image pull ubuntu:22.04