Daniel Schniepp dschniepp

Deploying Elixir and Phoenix applications using Docker and Exrm

Goal

By the end of this quick guide, you will know how to compile a Phoenix app release using Exrm and run it inside a Docker container. I've found only a couple of articles that discuss getting an Elixir app up and running inside a Docker container, and even those only touched on some parts of the process. The idea is that this guide will give you a full end-to-end example of how to get all the pieces and parts working together so that you are able to deploy your Phoenix application inside a Docker container.

Assumptions

You already have a working Elixir environment with the Phoenix Framework installed
You have at least basic working knowledge of Docker, and have installed the Docker tools onto your local environment

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Fullscreen Expanding Div

A Pen by Colin Lohner on CodePen.

License.

Moved to Shopify/graphql-design-tutorial

	# ATTENTION: This is now supported in plug_cowboy as of 2.1.0:
	# https://hexdocs.pm/plug_cowboy/Plug.Cowboy.Drainer.html

	defmodule DrainStop do
	@moduledoc """
	DrainStop Attempts to gracefully shutdown an endpoint when a normal shutdown
	occurs. It first shuts down the acceptor, ensuring that no new requests can be
	made. It then waits for all pending requests to complete. If the timeout
	expires before this happens, it stops waiting, allowing the supervision tree
	to continue its shutdown order.

	FROM elixir:1.4.5 as asset-builder-mix-getter

	ENV HOME=/opt/app

	RUN mix do local.hex --force, local.rebar --force
	# Cache elixir deps
	COPY config/ $HOME/config/
	COPY mix.exs mix.lock $HOME/
	COPY apps/myproject_web/mix.exs $HOME/apps/myproject_web/
	COPY apps/myproject_web/config/ $HOME/apps/myproject_web/config/

	<?php

	// Create in-memory SQLite database
	$sqlite = new PDO('sqlite::memory:');

	// Generate schema (for whatever tables you want)
	$sqlite->prepare('CREATE TABLE users(id, family_id, first_name, last_name, email)')->execute();
	$sqlite->prepare('CREATE TABLE families(id, name, phone, address)')->execute();

	// Insert pre-defined data

	defmodule Foo.Factory do
	alias Foo.Blog.{Post, Comment}

	def params_for(Post) do
	%{
	title: Faker.Lorem.sentence(),
	body: Faker.Lorem.paragraph()
	}
	end

	// http://genius.cat-v.org/brian-kernighan/articles/beautiful

	// c matches any literal character c
	// . matches any single character
	// ^ matches the beginning of the input string
	// $ matches the end of the input string
	// * matches zero or more occurrences of the previous character

	/* match: search for regexp anywhere in text */
	int match(char regexp, char text)

	# Move erts IO Polling to dedicated threads
	# https://github.com/erlang/otp/pull/1552