From 98e74dc75ce8b71d8f006a00e3cdcdcace71496e Mon Sep 17 00:00:00 2001
From: Stephen Turley <stephen@turley.dev>
Date: Sat, 16 Dec 2023 06:17:35 -0500
Subject: [PATCH] added fly.io config and removed Ecto config

---
 .dockerignore                   | 45 ++++++++++++++++
 Dockerfile                      | 92 +++++++++++++++++++++++++++++++++
 config/dev.exs                  |  9 ----
 config/prod.exs                 |  6 ---
 config/runtime.exs              | 16 ------
 config/test.exs                 | 13 -----
 elixir_buildpack.config         |  2 -
 fly.toml                        | 34 ++++++++++++
 lib/wordual/release.ex          | 28 ++++++++++
 phoenix_static_buildpack.config |  1 -
 rel/env.sh.eex                  |  8 +++
 rel/overlays/bin/migrate        |  3 ++
 rel/overlays/bin/migrate.bat    |  1 +
 rel/overlays/bin/server         |  3 ++
 rel/overlays/bin/server.bat     |  2 +
 15 files changed, 216 insertions(+), 47 deletions(-)
 create mode 100644 .dockerignore
 create mode 100644 Dockerfile
 delete mode 100644 elixir_buildpack.config
 create mode 100644 fly.toml
 create mode 100644 lib/wordual/release.ex
 delete mode 100644 phoenix_static_buildpack.config
 create mode 100755 rel/env.sh.eex
 create mode 100755 rel/overlays/bin/migrate
 create mode 100755 rel/overlays/bin/migrate.bat
 create mode 100755 rel/overlays/bin/server
 create mode 100755 rel/overlays/bin/server.bat

diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..61a7393
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,45 @@
+# This file excludes paths from the Docker build context.
+#
+# By default, Docker's build context includes all files (and folders) in the
+# current directory. Even if a file isn't copied into the container it is still sent to
+# the Docker daemon.
+#
+# There are multiple reasons to exclude files from the build context:
+#
+# 1. Prevent nested folders from being copied into the container (ex: exclude
+#    /assets/node_modules when copying /assets)
+# 2. Reduce the size of the build context and improve build time (ex. /build, /deps, /doc)
+# 3. Avoid sending files containing sensitive information
+#
+# More information on using .dockerignore is available here:
+# https://docs.docker.com/engine/reference/builder/#dockerignore-file
+
+.dockerignore
+
+# Ignore git, but keep git HEAD and refs to access current commit hash if needed:
+#
+# $ cat .git/HEAD | awk '{print ".git/"$2}' | xargs cat
+# d0b8727759e1e0e7aa3d41707d12376e373d5ecc
+.git
+!.git/HEAD
+!.git/refs
+
+# Common development/test artifacts
+/cover/
+/doc/
+/test/
+/tmp/
+.elixir_ls
+
+# Mix artifacts
+/_build/
+/deps/
+*.ez
+
+# Generated on crash by the VM
+erl_crash.dump
+
+# Static artifacts - These should be fetched and built inside the Docker image
+/assets/node_modules/
+/priv/static/assets/
+/priv/static/cache_manifest.json
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..d08810b
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,92 @@
+# Find eligible builder and runner images on Docker Hub. We use Ubuntu/Debian instead of
+# Alpine to avoid DNS resolution issues in production.
+#
+# https://hub.docker.com/r/hexpm/elixir/tags?page=1&name=ubuntu
+# https://hub.docker.com/_/ubuntu?tab=tags
+#
+#
+# This file is based on these images:
+#
+#   - https://hub.docker.com/r/hexpm/elixir/tags - for the build image
+#   - https://hub.docker.com/_/debian?tab=tags&page=1&name=bullseye-20231009-slim - for the release image
+#   - https://pkgs.org/ - resource for finding needed packages
+#   - Ex: hexpm/elixir:1.15.7-erlang-26.1.2-debian-bullseye-20231009-slim
+#
+ARG ELIXIR_VERSION=1.15.7
+ARG OTP_VERSION=26.1.2
+ARG DEBIAN_VERSION=bullseye-20231009-slim
+
+ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
+ARG RUNNER_IMAGE="debian:${DEBIAN_VERSION}"
+
+FROM ${BUILDER_IMAGE} as builder
+
+# install build dependencies
+RUN apt-get update -y && apt-get install -y build-essential git \
+    && apt-get clean && rm -f /var/lib/apt/lists/*_*
+
+# prepare build dir
+WORKDIR /app
+
+# install hex + rebar
+RUN mix local.hex --force && \
+    mix local.rebar --force
+
+# set build ENV
+ENV MIX_ENV="prod"
+
+# install mix dependencies
+COPY mix.exs mix.lock ./
+RUN mix deps.get --only $MIX_ENV
+RUN mkdir config
+
+# copy compile-time config files before we compile dependencies
+# to ensure any relevant config change will trigger the dependencies
+# to be re-compiled.
+COPY config/config.exs config/words.exs config/${MIX_ENV}.exs config/
+RUN mix deps.compile
+
+COPY priv priv
+
+COPY lib lib
+
+COPY assets assets
+
+# compile assets
+RUN mix assets.deploy
+
+# Compile the release
+RUN mix compile
+
+# Changes to config/runtime.exs don't require recompiling the code
+COPY config/runtime.exs config/
+
+COPY rel rel
+RUN mix release
+
+# start a new build stage so that the final image will only contain
+# the compiled release and other runtime necessities
+FROM ${RUNNER_IMAGE}
+
+RUN apt-get update -y && apt-get install -y libstdc++6 openssl libncurses5 locales \
+  && apt-get clean && rm -f /var/lib/apt/lists/*_*
+
+# Set the locale
+RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
+
+ENV LANG en_US.UTF-8
+ENV LANGUAGE en_US:en
+ENV LC_ALL en_US.UTF-8
+
+WORKDIR "/app"
+RUN chown nobody /app
+
+# set runner ENV
+ENV MIX_ENV="prod"
+
+# Only copy the final release from the build stage
+COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/wordual ./
+
+USER nobody
+
+CMD ["/app/bin/server"]
diff --git a/config/dev.exs b/config/dev.exs
index 54cab0f..6be9619 100644
--- a/config/dev.exs
+++ b/config/dev.exs
@@ -1,14 +1,5 @@
 import Config
 
-# Configure your database
-config :wordual, Wordual.Repo,
-  username: "postgres",
-  password: "postgres",
-  hostname: "localhost",
-  database: "wordual_dev",
-  show_sensitive_data_on_connection_error: true,
-  pool_size: 10
-
 # For development, we disable any cache and enable
 # debugging and code reloading.
 #
diff --git a/config/prod.exs b/config/prod.exs
index 2d7a034..f035991 100644
--- a/config/prod.exs
+++ b/config/prod.exs
@@ -19,12 +19,6 @@ config :wordual, WordualWeb.Endpoint,
   cache_static_manifest: "priv/static/cache_manifest.json",
   version: Mix.Project.config()[:version]
 
-config :wordual, Wordual.Repo,
-  adapter: Ecto.Adapters.Postgres,
-  url: "${DATABASE_URL}",
-  database: "",
-  pool_size: String.to_integer(System.get_env("POOL_SIZE") || "10")
-
 # Do not print debug messages in production
 config :logger, level: :info
 
diff --git a/config/runtime.exs b/config/runtime.exs
index 171be77..d612d27 100644
--- a/config/runtime.exs
+++ b/config/runtime.exs
@@ -13,22 +13,6 @@ if System.get_env("PHX_SERVER") && System.get_env("RELEASE_NAME") do
 end
 
 if config_env() == :prod do
-  database_url =
-    System.get_env("DATABASE_URL") ||
-      raise """
-      environment variable DATABASE_URL is missing.
-      For example: ecto://USER:PASS@HOST/DATABASE
-      """
-
-  maybe_ipv6 = if System.get_env("ECTO_IPV6"), do: [:inet6], else: []
-
-  config :wordual, Wordual.Repo,
-    # ssl: true,
-    url: database_url,
-    database: "wordual",
-    pool_size: String.to_integer(System.get_env("POOL_SIZE") || "10"),
-    socket_options: maybe_ipv6
-
   # The secret key base is used to sign/encrypt cookies and other secrets.
   # A default value is used in config/dev.exs and config/test.exs but you
   # want to use a different value for prod and you most likely don't want
diff --git a/config/test.exs b/config/test.exs
index 96b7bd0..ce7a044 100644
--- a/config/test.exs
+++ b/config/test.exs
@@ -1,18 +1,5 @@
 import Config
 
-# Configure your database
-#
-# The MIX_TEST_PARTITION environment variable can be used
-# to provide built-in test partitioning in CI environment.
-# Run `mix help test` for more information.
-config :wordual, Wordual.Repo,
-  username: "postgres",
-  password: "postgres",
-  hostname: "localhost",
-  database: "wordual_test#{System.get_env("MIX_TEST_PARTITION")}",
-  pool: Ecto.Adapters.SQL.Sandbox,
-  pool_size: 10
-
 # We don't run a server during test. If one is required,
 # you can enable the server option below.
 config :wordual, WordualWeb.Endpoint,
diff --git a/elixir_buildpack.config b/elixir_buildpack.config
deleted file mode 100644
index 1e342d2..0000000
--- a/elixir_buildpack.config
+++ /dev/null
@@ -1,2 +0,0 @@
-elixir_version=1.13.2
-erlang_version=24.2
diff --git a/fly.toml b/fly.toml
new file mode 100644
index 0000000..2f9429b
--- /dev/null
+++ b/fly.toml
@@ -0,0 +1,34 @@
+# fly.toml app configuration file generated for wordual on 2023-12-16T06:04:27-05:00
+#
+# See https://fly.io/docs/reference/configuration/ for information about how to use this file.
+#
+
+app = "wordual"
+primary_region = "ord"
+kill_signal = "SIGTERM"
+
+[build]
+
+# [deploy]
+#   release_command = "/app/bin/migrate"
+
+[env]
+  PHX_HOST = "wordual.fly.dev"
+  PORT = "8080"
+
+[http_service]
+  internal_port = 8080
+  force_https = true
+  auto_stop_machines = true
+  auto_start_machines = true
+  min_machines_running = 0
+  processes = ["app"]
+  [http_service.concurrency]
+    type = "connections"
+    hard_limit = 1000
+    soft_limit = 1000
+
+[[vm]]
+  cpu_kind = "shared"
+  cpus = 1
+  memory_mb = 1024
diff --git a/lib/wordual/release.ex b/lib/wordual/release.ex
new file mode 100644
index 0000000..ee15da6
--- /dev/null
+++ b/lib/wordual/release.ex
@@ -0,0 +1,28 @@
+defmodule Wordual.Release do
+  @moduledoc """
+  Used for executing DB release tasks when run in production without Mix
+  installed.
+  """
+  @app :wordual
+
+  def migrate do
+    load_app()
+
+    for repo <- repos() do
+      {:ok, _, _} = Ecto.Migrator.with_repo(repo, &Ecto.Migrator.run(&1, :up, all: true))
+    end
+  end
+
+  def rollback(repo, version) do
+    load_app()
+    {:ok, _, _} = Ecto.Migrator.with_repo(repo, &Ecto.Migrator.run(&1, :down, to: version))
+  end
+
+  defp repos do
+    Application.fetch_env!(@app, :ecto_repos)
+  end
+
+  defp load_app do
+    Application.load(@app)
+  end
+end
diff --git a/phoenix_static_buildpack.config b/phoenix_static_buildpack.config
deleted file mode 100644
index 16e8c73..0000000
--- a/phoenix_static_buildpack.config
+++ /dev/null
@@ -1 +0,0 @@
-node_version=17.4.0
diff --git a/rel/env.sh.eex b/rel/env.sh.eex
new file mode 100755
index 0000000..2bdface
--- /dev/null
+++ b/rel/env.sh.eex
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# configure node for distributed erlang with IPV6 support
+export ERL_AFLAGS="-proto_dist inet6_tcp"
+export ECTO_IPV6="true"
+export DNS_CLUSTER_QUERY="${FLY_APP_NAME}.internal"
+export RELEASE_DISTRIBUTION="name"
+export RELEASE_NODE="${FLY_APP_NAME}-${FLY_IMAGE_REF##*-}@${FLY_PRIVATE_IP}"
diff --git a/rel/overlays/bin/migrate b/rel/overlays/bin/migrate
new file mode 100755
index 0000000..02561f6
--- /dev/null
+++ b/rel/overlays/bin/migrate
@@ -0,0 +1,3 @@
+#!/bin/sh
+cd -P -- "$(dirname -- "$0")"
+exec ./wordual eval Wordual.Release.migrate
diff --git a/rel/overlays/bin/migrate.bat b/rel/overlays/bin/migrate.bat
new file mode 100755
index 0000000..f4691c6
--- /dev/null
+++ b/rel/overlays/bin/migrate.bat
@@ -0,0 +1 @@
+call "%~dp0\wordual" eval Wordual.Release.migrate
diff --git a/rel/overlays/bin/server b/rel/overlays/bin/server
new file mode 100755
index 0000000..70d0812
--- /dev/null
+++ b/rel/overlays/bin/server
@@ -0,0 +1,3 @@
+#!/bin/sh
+cd -P -- "$(dirname -- "$0")"
+PHX_SERVER=true exec ./wordual start
diff --git a/rel/overlays/bin/server.bat b/rel/overlays/bin/server.bat
new file mode 100755
index 0000000..745b6de
--- /dev/null
+++ b/rel/overlays/bin/server.bat
@@ -0,0 +1,2 @@
+set PHX_SERVER=true
+call "%~dp0\wordual" start