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

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

	# 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.

	<html>
	<head>
	<title>Step progress bar</title>
	<style type="text/css">
	.container {
	width: 100%;
	}
	.progressbar {
	counter-reset: step;
	}

	#!/bin/bash
	if [ "$EUID" -ne 0 ]
	then echo "Please run as root"
	exit
	fi

	apt-get install pkg-config libmagickwand-dev -y
	cd /tmp
	wget https://pecl.php.net/get/imagick-3.4.0.tgz
	tar xvzf imagick-3.4.0.tgz

	<?php

	namespace App\Http\Middleware;

	use Closure;
	use Illuminate\Http\Request;
	use Illuminate\Http\Response;
	use Symfony\Component\DomCrawler\Crawler;

	class PjaxMiddleware

	<?php namespace App\Providers;

	use Illuminate\Support\ServiceProvider;

	/**
	* If the incoming request is an OPTIONS request
	* we will register a handler for the requested route
	*/
	class CatchAllOptionsRequestsProvider extends ServiceProvider {

	# supervisor
	#
	# Author: Günter Grodotzki <[email protected]>
	# Version: 2015-04-25
	#
	# - set param "SUPERVISE=enable" to activate
	# - chmod +x supervise.sh
	#
	packages:
	yum:

	<?php

	/* This gist is offered as is, make sure to test in your environment
	*
	* This class can be used to iterate over a large Eloquent query. It uses a combination of the PDO Fetch and
	* the chunk methods to collect a series of items in memory. The chunk part was necessary in order to implement
	* eager loading options. You can set the CHUNK_SIZE in the code to set how many rows to load in memory at a time
	* again for the eager loading purposes.
	*
	* I am sure there are other ways to implement this technique more effectively