Setup Fly Deployment CI

Author: BrooklinJazz

.dockerignore

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+# flyctl launch added from .elixir_ls/.gitignore
+.elixir_ls/**/*
+
+# flyctl launch added from .gitignore
+# The directory Mix will write compiled artifacts to.
+_build
+
+# If you run "mix test --cover", coverage assets end up here.
+cover
+
+# The directory Mix downloads your dependencies sources to.
+deps
+
+# Where 3rd-party dependencies like ExDoc output generated docs.
+doc
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+**/erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+**/*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+**/elixir_newbie-*.tar
+
+# Ignore assets that are produced by build tools.
+priv/static/assets
+
+# Ignore digested assets cache.
+priv/static/cache_manifest.json
+
+# In case you use Node.js/npm, you want to ignore these.
+**/npm-debug.log
+assets/node_modules
+
+fly.toml

.github/workflows/fly.yml

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+name: Fly Deploy
+on:
+  push:
+    branches:
+      - main
+env:
+  FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}
+jobs:
+  deploy:
+      name: Deploy app
+      runs-on: ubuntu-latest
+      steps:
+        - uses: actions/checkout@v3
+        - uses: superfly/flyctl-actions/setup-flyctl@master
+        - run: flyctl deploy --remote-only

Dockerfile

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+# 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-20221004-slim - for the release image
+#   - https://pkgs.org/ - resource for finding needed packages
+#   - Ex: hexpm/elixir:1.14.2-erlang-25.1.2-debian-bullseye-20221004-slim
+#
+ARG ELIXIR_VERSION=1.14.2
+ARG OTP_VERSION=25.1.2
+ARG DEBIAN_VERSION=bullseye-20221004-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 $MIX_ENV
+RUN mkdir config
+
+# copy compile-time config files before we compile dependencies
+# to ensure any relevant config change will trigger the dependencies
+# to be re-compiled.
+COPY config/config.exs config/${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/elixir_newbie ./
+
+USER nobody
+
+CMD ["/app/bin/server"]
+
+# Appended by flyctl
+ENV ECTO_IPV6 true
+ENV ERL_AFLAGS "-proto_dist inet6_tcp"

fly.toml

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+# fly.toml file generated for elixirnewbie on 2022-12-29T13:13:04-08:00
+
+app = "elixirnewbie"
+kill_signal = "SIGTERM"
+kill_timeout = 5
+processes = []
+
+[deploy]
+  release_command = "/app/bin/migrate"
+
+[env]
+  PHX_HOST = "elixirnewbie.fly.dev"
+  PORT = "8080"
+
+[experimental]
+  allowed_public_ports = []
+  auto_rollback = true
+
+[[services]]
+  http_checks = []
+  internal_port = 8080
+  processes = ["app"]
+  protocol = "tcp"
+  script_checks = []
+  [services.concurrency]
+    hard_limit = 25
+    soft_limit = 20
+    type = "connections"
+
+  [[services.ports]]
+    force_https = true
+    handlers = ["http"]
+    port = 80
+
+  [[services.ports]]
+    handlers = ["tls", "http"]
+    port = 443
+
+  [[services.tcp_checks]]
+    grace_period = "1s"
+    interval = "15s"
+    restart_limit = 0
+    timeout = "2s"

lib/elixir_newbie/release.ex

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+defmodule ElixirNewbie.Release do
+  @moduledoc """
+  Used for executing DB release tasks when run in production without Mix
+  installed.
+  """
+  @app :elixir_newbie
+
+  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

lib/elixir_newbie_web/live/home_live.ex

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+defmodule ElixirNewbieWeb.HomeLive do
+  use ElixirNewbieWeb, :live_view
+
+  def render(assigns) do
+    ~H"""
+    Hello World
+    """
+  end
+
+  def mount(_params, _session, socket) do
+    {:ok, socket}
+  end
+end

lib/elixir_newbie_web/router.ex

@@ -17,7 +17,8 @@ defmodule ElixirNewbieWeb.Router do
   scope "/", ElixirNewbieWeb do
     pipe_through :browser
 
-    get "/", PageController, :home
+    # get "/", PageController, :home
+    live "/", HomeLive, :home
   end
 
   # Other scopes may use custom stacks.

rel/overlays/bin/migrate

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+#!/bin/sh
+cd -P -- "$(dirname -- "$0")"
+exec ./elixir_newbie eval ElixirNewbie.Release.migrate

rel/overlays/bin/migrate.bat

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+call "%~dp0\elixir_newbie" eval ElixirNewbie.Release.migrate

rel/overlays/bin/server

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+#!/bin/sh
+cd -P -- "$(dirname -- "$0")"
+PHX_SERVER=true exec ./elixir_newbie start

rel/overlays/bin/server.bat

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+set PHX_SERVER=true
+call "%~dp0\elixir_newbie" start