jkt3000 · July 10, 2024 17:58 · Jan 1, 2022
diff --git a/Dockerfile b/Dockerfile
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+# Rails production setup via SQLite3 made durable by https://litestream.io/ 
+# Copy this to Dockerfile on a fresh rails app. Deploy to fly.io or any other container engine. 
+#
+#  try locally: docker build . -t rails && docker run -p3000:3000 -it rails
+#
+#  in production you might want to map /data to somewhere on the host, 
+#  but you don't have to!
+# 
+FROM ruby:3.0.2
+
+# use https://github.com/benbjohnson/litestream/releases/download/v0.3.7/litestream-v0.3.7-linux-amd64-static.tar.gz on intel
+ADD https://github.com/benbjohnson/litestream/releases/download/v0.3.7/litestream-v0.3.7-linux-arm64-static.tar.gz /tmp/litestream.tar.gz
+RUN tar -C /usr/local/bin -xzf /tmp/litestream.tar.gz
+
+ENV RAILS_ENV 'production'
+ENV DB_PATH '/data/production.sqlite3'
+
+# find a REPLICA_URL host/keys setup for persisting your sqlite3 database ( https://litestream.io/guides/ )
+# supports sftp, s3, azure, google cloud storage, backblaze, etc. you probably have an account 
+# already 
+ENV REPLICA_URL 's3://<your-url>/db.sqlite3'
+ENV LITESTREAM_ACCESS_KEY_ID '<your-access-key-id>'
+ENV LITESTREAM_SECRET_ACCESS_KEY '<your-secret-access-key>'
+
+# get dependencies
+WORKDIR /app
+ADD Gemfile /app/
+ADD Gemfile.lock /app/
+RUN bundle install
+
+# add code (and bundle)
+ADD . /app
+RUN bundle exec rake assets:precompile
+
+# rails expects production.sqlite3 to be in db/production.sqlite3
+RUN ln -nfs $DB_PATH /app/db/production.sqlite3
+
+EXPOSE 3000
+
+CMD \
+  # if the db file doesn't exist we get it from the REPLICA_URL
+  [ ! -f $DB_PATH ] && litestream restore -v -if-replica-exists -o $DB_PATH "${REPLICA_URL}" \
+  # then we run the migrations
+  ; bundle exec rake db:migrate \
+  # then we launch replicate and execute rails server
+  ; litestream replicate -exec "bundle exec rails server -p 3000" $DB_PATH $REPLICA_URL