Robert Citek rwcitek

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

First, create a Personal Accesss Token ( PAT )

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.

	# 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

	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 && \

	# 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

	# 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: create a blank repo in GitHub and note repo URL
	# i.e. no README, no license, completely blank
	REMOTE_URL='https://github.com/sluugdemogithub/demo03.git'

	# create the URL for GitHub Pages

	# https://dvillalobos.github.io/2020/How-to-install-and-run-Docker-on-a-Chromebook/

	export DEBIAN_FRONTEND=noninteractive

	sudo apt-get update --allow-releaseinfo-change

	sudo apt-get -y install \
	apt-transport-https \
	ca-certificates \
	curl \

	# from http://docs.ansible.com/intro_installation.html#running-from-source
	# as of 2015-02-08

	## ansible on Ubuntu 10.04
	# become root
	sudo su -

	# as root ...
	apt-get update
	apt-get -y install python-pip python-dev git-core make

	# finding DEB packages that should be held back because they will require a reboot to take effect

	# get latest state of packages
	apt-get clean && apt-get update && apt-get -dy upgrade

	# find those needing reboot
	cd /var/cache/apt/archives/ && rm -rf DEBIAN
	for i in *.deb ; do
	echo == ${i}
	dpkg-deb -e ${i}