add fly config

Author: manuelmeurer

.dockerignore

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+.git
+tmp
+!tmp/pids
+log
+public/assets
+public/packs
+.bundle
+
+db/*.sqlite3
+db/*.sqlite3-*
+
+storage
+config/master.key
+config/credentials/*.key
+
+node_modules

Dockerfile

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+# syntax = docker/dockerfile:experimental
+
+# Dockerfile used to build a deployable image for a Rails application.
+# Adjust as required.
+#
+# Common adjustments you may need to make over time:
+#  * Modify version numbers for Ruby, Bundler, and other products.
+#  * Add library packages needed at build time for your gems, node modules.
+#  * Add deployment packages needed by your application
+#  * Add (often fake) secrets needed to compile your assets
+
+#######################################################################
+
+# Learn more about the chosen Ruby stack, Fullstaq Ruby, here:
+#   https://github.com/evilmartians/fullstaq-ruby-docker.
+#
+# We recommend using the highest patch level for better security and
+# performance.
+
+ARG RUBY_VERSION=3.1.2
+ARG VARIANT=jemalloc-bullseye-slim
+FROM quay.io/evl.ms/fullstaq-ruby:${RUBY_VERSION}-${VARIANT} as base
+
+LABEL fly_launch_runtime="rails"
+
+ARG BUNDLER_VERSION=2.3.26
+
+ARG RAILS_ENV=production
+ENV RAILS_ENV=${RAILS_ENV}
+
+ENV RAILS_SERVE_STATIC_FILES true
+ENV RAILS_LOG_TO_STDOUT true
+
+ARG BUNDLE_WITHOUT=development:test
+ARG BUNDLE_PATH=vendor/bundle
+ENV BUNDLE_PATH ${BUNDLE_PATH}
+ENV BUNDLE_WITHOUT ${BUNDLE_WITHOUT}
+
+RUN mkdir /app
+WORKDIR /app
+RUN mkdir -p tmp/pids
+
+RUN gem update --system --no-document && \
+    gem install -N bundler -v ${BUNDLER_VERSION}
+
+#######################################################################
+
+# install packages only needed at build time
+
+FROM base as build_deps
+
+ARG BUILD_PACKAGES="git build-essential libpq-dev wget vim curl gzip xz-utils libsqlite3-dev"
+ENV BUILD_PACKAGES ${BUILD_PACKAGES}
+
+RUN --mount=type=cache,id=dev-apt-cache,sharing=locked,target=/var/cache/apt \
+    --mount=type=cache,id=dev-apt-lib,sharing=locked,target=/var/lib/apt \
+    apt-get update -qq && \
+    apt-get install --no-install-recommends -y ${BUILD_PACKAGES} && \
+    rm -rf /var/lib/apt/lists /var/cache/apt/archives
+
+#######################################################################
+
+# install gems
+
+FROM build_deps as gems
+
+COPY Gemfile* ./
+RUN bundle install &&  rm -rf vendor/bundle/ruby/*/cache
+
+#######################################################################
+
+# install deployment packages
+
+FROM base
+
+ARG DEPLOY_PACKAGES="postgresql-client file vim curl gzip libsqlite3-0"
+ENV DEPLOY_PACKAGES=${DEPLOY_PACKAGES}
+
+RUN --mount=type=cache,id=prod-apt-cache,sharing=locked,target=/var/cache/apt \
+    --mount=type=cache,id=prod-apt-lib,sharing=locked,target=/var/lib/apt \
+    apt-get update -qq && \
+    apt-get install --no-install-recommends -y ${DEPLOY_PACKAGES} && \
+    rm -rf /var/lib/apt/lists /var/cache/apt/archives
+
+# copy installed gems
+COPY --from=gems /app /app
+COPY --from=gems /usr/lib/fullstaq-ruby/versions /usr/lib/fullstaq-ruby/versions
+COPY --from=gems /usr/local/bundle /usr/local/bundle
+
+#######################################################################
+
+# Deploy your application
+COPY . .
+
+# Adjust binstubs to run on Linux and set current working directory
+RUN chmod +x /app/bin/* && \
+    sed -i 's/ruby.exe\r*/ruby/' /app/bin/* && \
+    sed -i '/^#!/aDir.chdir File.expand_path("..", __dir__)' /app/bin/*
+
+# The following enable assets to precompile on the build server.  Adjust
+# as necessary.  If no combination works for you, see:
+# https://fly.io/docs/rails/getting-started/existing/#access-to-environment-variables-at-build-time
+ENV SECRET_KEY_BASE 1
+# ENV AWS_ACCESS_KEY_ID=1
+# ENV AWS_SECRET_ACCESS_KEY=1
+
+# Run build task defined in lib/tasks/fly.rake
+ARG BUILD_COMMAND="bin/rails fly:build"
+RUN ${BUILD_COMMAND}
+
+# Default server start instructions.  Generally Overridden by fly.toml.
+ENV PORT 8080
+ARG SERVER_COMMAND="bin/rails fly:server"
+ENV SERVER_COMMAND ${SERVER_COMMAND}
+CMD ${SERVER_COMMAND}

fly.toml

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+# fly.toml file generated for ruby-docs on 2022-12-04T08:18:39+01:00
+
+app = "ruby-docs"
+kill_signal = "SIGINT"
+kill_timeout = 5
+processes = []
+
+[build]
+  [build.args]
+    BUILD_COMMAND = "bin/rails fly:build"
+    SERVER_COMMAND = "bin/rails fly:server"
+
+[deploy]
+  release_command = "bin/rails fly:release"
+
+[env]
+  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"
+
+[[statics]]
+  guest_path = "/app/public"
+  url_prefix = "/"

lib/tasks/fly.rake

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+# commands used to deploy a Rails application
+namespace :fly do
+  # BUILD step:
+  #  - changes to the filesystem made here DO get deployed
+  #  - NO access to secrets, volumes, databases
+  #  - Failures here prevent deployment
+  task :build => 'assets:precompile'
+
+  # RELEASE step:
+  #  - changes to the filesystem made here are DISCARDED
+  #  - full access to secrets, databases
+  #  - failures here prevent deployment
+  task :release => 'db:migrate'
+
+  # SERVER step:
+  #  - changes to the filesystem made here are deployed
+  #  - full access to secrets, databases
+  #  - failures here result in VM being stated, shutdown, and rolled back
+  #    to last successful deploy (if any).
+  task :server => :swapfile do
+    sh 'bin/rails server'
+  end
+
+  # optional SWAPFILE task:
+  #  - adjust fallocate size as needed
+  #  - performance critical applications should scale memory to the
+  #    point where swap is rarely used.  'fly scale help' for details.
+  #  - disable by removing dependency on the :server task, thus:
+  #        task :server do
+  task :swapfile do
+    sh 'fallocate -l 512M /swapfile'
+    sh 'chmod 0600 /swapfile'
+    sh 'mkswap /swapfile'
+    sh 'echo 10 > /proc/sys/vm/swappiness'
+    sh 'swapon /swapfile'
+  end
+end