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## Flexible Dockerized Phoenix Deployments.md

      
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                Faolain
                / Flexible Dockerized Phoenix Deployments.md
            
            
              Created
              November 18, 2018 07:40
                — forked from jswny/Flexible Dockerized Phoenix Deployments.md
            
              
                A guide to building and running zero-dependency Phoenix (Elixir) deployments with Docker. Works with Phoenix 1.2 and 1.3.
              
          
    Prelude

I. Preface and Motivation

This guide was written because I don't particularly enjoy deploying Phoenix (or Elixir for that matter) applications. It's not easy. Primarily, I don't have a lot of money to spend on a nice, fancy VPS so compiling my Phoenix apps on my VPS often isn't an option. For that, we have Distillery releases. However, that requires me to either have a separate server for staging to use as a build server, or to keep a particular version of Erlang installed on my VPS, neither of which sound like great options to me and they all have the possibilities of version mismatches with ERTS. In addition to all this, theres a whole lot of configuration which needs to be done to setup a Phoenix app for deployment, and it's hard to remember.
For that reason, I wanted to use Docker so that all of my deployments would be automated and reproducable. In addition, Docker would allow me to have reproducable builds for my releases. I could build my releases on any machine that I wanted in a contai

  
## phoenix_to_umbrella
How to convert existing phoenix app to an umbrella app.
https://elixir-lang.slack.com/archives/phoenix/p1472921051000134


chrismccord [10:14 PM]
@alanpeabody yes, it's straightforward

[10:14]
1) mix new my_umbrella --umbrella

## Error Logs
#Docker Container Logs

4/23/2017 9:29:13 PM Node 'hello@10.42.69.252' not responding to pings.
4/23/2017 9:29:14 PM Node 'hello@10.42.69.252' not responding to pings.
4/23/2017 9:29:14 PM Node 'hello@10.42.69.252' not responding to pings.
4/23/2017 9:29:15 PM Node 'hello@10.42.69.252' not responding to pings.
4/23/2017 9:29:16 PM 01:29:16.104 [info] Running Hello.Endpoint with Cowboy using http://localhost:8080
4/23/2017 9:29:16 PM Connecting to phoenix: [{10, 42, 69, 252}]
4/23/2017 9:29:16 PM pong
4/23/2017 9:29:16 PM Application is up!

## seed.ex
defmodule :release_tasks do

  def seed do
    :ok = Application.load(:myapp)

    [:postgrex, :ecto, :logger]
    |> Enum.each(&Application.ensure_all_started/1)

    Myapp.Repo.start_link


## poolboy_demo.ex
defmodule HttpRequester do
  use GenServer

  def start_link(_) do
    GenServer.start_link(__MODULE__, nil, [])
  end

  def fetch(server, url) do
    # Don't use cast: http://blog.elixirsips.com/2014/07/16/errata-dont-use-cast-in-a-poolboy-transaction/
    timeout_ms = 10_000
	How to convert existing phoenix app to an umbrella app.
	https://elixir-lang.slack.com/archives/phoenix/p1472921051000134


	chrismccord [10:14 PM]
	@alanpeabody yes, it's straightforward

	[10:14]
	1) mix new my_umbrella --umbrella
	#Docker Container Logs

	4/23/2017 9:29:13 PM Node 'hello@10.42.69.252' not responding to pings.
	4/23/2017 9:29:14 PM Node 'hello@10.42.69.252' not responding to pings.
	4/23/2017 9:29:14 PM Node 'hello@10.42.69.252' not responding to pings.
	4/23/2017 9:29:15 PM Node 'hello@10.42.69.252' not responding to pings.
	4/23/2017 9:29:16 PM 01:29:16.104 [info] Running Hello.Endpoint with Cowboy using http://localhost:8080
	4/23/2017 9:29:16 PM Connecting to phoenix: [{10, 42, 69, 252}]
	4/23/2017 9:29:16 PM pong
	4/23/2017 9:29:16 PM Application is up!
	defmodule :release_tasks do

	def seed do
	:ok = Application.load(:myapp)

	[:postgrex, :ecto, :logger]
	\|> Enum.each(&Application.ensure_all_started/1)

	Myapp.Repo.start_link
	defmodule HttpRequester do
	use GenServer

	def start_link(_) do
	GenServer.start_link(__MODULE__, nil, [])
	end

	def fetch(server, url) do
	# Don't use cast: http://blog.elixirsips.com/2014/07/16/errata-dont-use-cast-in-a-poolboy-transaction/
	timeout_ms = 10_000