config/config.exs

@@ -2,6 +2,5 @@ import Config
 
 config :ha_handler,
 	http_port: 4000,
-	acme_challenge_path: "acme-challenge",
 	haproxy_socket: System.get_env("HAPROXY_SOCKET") || "/var/run/haproxy.sock"
 

lib/ha_handler.ex

@@ -3,5 +3,4 @@ defmodule HAHandler do
 
   def http_port, do: Application.get_env(:ha_handler, :http_port)
   def haproxy_socket, do: Application.get_env(:ha_handler, :haproxy_socket)
-  def acme_challenge_path, do: Application.get_env(:ha_handler, :acme_challenge_path)
 end

lib/ha_handler/application.ex

@@ -10,7 +10,7 @@ defmodule HAHandler.Application do
   @impl true
   def start(_type, _args) do
     children = [
-      {Plug.Cowboy, scheme: :http, plug: HAHandler.Web.Router, options: [port: http_port()]}
+      {Plug.Cowboy, scheme: :http, plug: HAHandler.Web, options: [port: http_port()]}
     ]
 
     # See https://hexdocs.pm/elixir/Supervisor.html

lib/ha_handler/web.ex

@@ -1,9 +1,13 @@
-defmodule HAHandler.Web.Controller do
+defmodule HAHandler.Web do
 	import Plug.Conn
 
 	alias HAHandler.HAProxy
 
-	def index(conn) do
+	def init(opts) do
+		opts
+	end
+
+	def call(conn, _opts) do
 		{:ok, hostname} = :inet.gethostname()
 
 		stats = HAProxy.get_stats()

lib/ha_handler/web/router.ex

@@ -1,35 +0,0 @@
-defmodule HAHandler.Web.Router do
-	@moduledoc """
-	This module dispatch incoming HTTP requests to their
-	related logic. Please refer to [1] for details.
-
-	[1] https://hexdocs.pm/plug/Plug.Router.html#content
-	"""
-
-	use Plug.Router
-
-	import HAHandler, only: [acme_challenge_path: 0]
-
-	alias HAHandler.Web.Controller
-
-	# Note for plugs: oder is important, as a plug may stop
-	# want to stop the pipeline!
-
-	plug Plug.Logger, log: :debug
-	# Note: `plug` is a macro, hence evaluated at
-	# compile-time. The configuration (which path to
-	# serve) cannot be modified at runtime with this
-	# system.
-	plug Plug.Static,
-		at: "/.well-known/acme-challenge/",
-		from: acme_challenge_path()
-
-	plug :match
-	plug :dispatch
-
-	get "/", do: Controller.index(conn)
-
-	match _ do
-		send_resp(conn, 404, "Not found")
-	end
-end

mix.exs

@@ -7,8 +7,7 @@ defmodule HAHandler.MixProject do
       version: "0.1.0",
       elixir: "~> 1.12",
       start_permanent: Mix.env() == :prod,
-      deps: deps(),
-      releases: releases()
+      deps: deps()
     ]
   end
 
@@ -29,18 +28,4 @@ defmodule HAHandler.MixProject do
       {:poison, "~> 5.0"}
     ]
   end
-
-  # See https://hexdocs.pm/mix/Mix.Tasks.Release.html for details.
-  defp releases do
-    [
-      ha_handler: [
-        include_executables_for: [:unix],
-        applications: [runtime_tools: :permanent],
-        include_erts: true,
-        config_providers: [
-          {Config.Reader, {:system, "HA_HANDLER_CONFIG_DIR", "config.exs"}}
-        ]
-      ]
-    ]
-  end
 end

rel/env.sh.eex

@@ -1,17 +0,0 @@
-#!/bin/sh
-
-# Sets and enables heart (recommended only in daemon mode)
-# case $RELEASE_COMMAND in
-#   daemon*)
-#     HEART_COMMAND="$RELEASE_ROOT/bin/$RELEASE_NAME $RELEASE_COMMAND"
-#     export HEART_COMMAND
-#     export ELIXIR_ERL_OPTIONS="-heart"
-#     ;;
-#   *)
-#     ;;
-# esac
-
-# Set the release to work across nodes.
-# RELEASE_DISTRIBUTION must be "sname" (local), "name" (distributed) or "none".
-# export RELEASE_DISTRIBUTION=name
-# export RELEASE_NODE=<%= @release.name %>

rel/remote.vm.args.eex

@@ -1,11 +0,0 @@
-## Customize flags given to the VM: https://erlang.org/doc/man/erl.html
-## -mode/-name/-sname/-setcookie are configured via env vars, do not set them here
-
-## Number of dirty schedulers doing IO work (file, sockets, and others)
-##+SDio 5
-
-## Increase number of concurrent ports/sockets
-##+Q 65536
-
-## Tweak GC to run more often
-##-env ERL_FULLSWEEP_AFTER 10

rel/vm.args.eex

@@ -1,11 +0,0 @@
-## Customize flags given to the VM: https://erlang.org/doc/man/erl.html
-## -mode/-name/-sname/-setcookie are configured via env vars, do not set them here
-
-## Number of dirty schedulers doing IO work (file, sockets, and others)
-##+SDio 5
-
-## Increase number of concurrent ports/sockets
-##+Q 65536
-
-## Tweak GC to run more often
-##-env ERL_FULLSWEEP_AFTER 10