[RAILS] Added Docker configuration for the example applications

Author: karmi

elasticsearch-rails/lib/rails/templates/.dockerignore

@@ -0,0 +1,3 @@
+tmp/*
+log/*
+.git

elasticsearch-rails/lib/rails/templates/.gitignore

@@ -0,0 +1 @@
+searchapp-*

elasticsearch-rails/lib/rails/templates/Dockerfile

@@ -0,0 +1,29 @@
+# docker build --tag searchapp-01 --build-arg PATH_TO_APPLICATION=searchapp-01 .
+
+FROM ruby:2.3
+
+MAINTAINER [email protected]
+
+ARG PATH_TO_APPLICATION
+
+RUN apt-get update && apt-get install --yes --fix-missing \
+  build-essential \
+  sqlite3 \
+  libsqlite3-dev \
+  nodejs
+
+RUN mkdir -p /app
+WORKDIR /app
+
+COPY ${PATH_TO_APPLICATION}/Gemfile ${PATH_TO_APPLICATION}/Gemfile.lock ./
+RUN gem install bundler && bundle install --jobs 4 --retry 3
+
+COPY ${PATH_TO_APPLICATION} ./
+
+EXPOSE 3000
+
+ENV RAILS_ENV=production RAILS_SERVE_STATIC_FILES=true
+
+RUN rm -f /app/tmp/pids/server.pid
+
+CMD ["bundle", "exec", "rails", "server", "-p", "3000", "-b", "0.0.0.0"]

elasticsearch-rails/lib/rails/templates/docker-compose.yml

@@ -0,0 +1,43 @@
+version: '2'
+
+services:
+  searchapp-01:
+    build:
+      context: .
+      args:
+        PATH_TO_APPLICATION: ./searchapp-01
+    command: rails server -p 3000 -b '0.0.0.0'
+    environment:
+      - ELASTICSEARCH_URL=${ELASTICSEARCH_URL}
+    ports:
+      - "3001:3000"
+
+  searchapp-02:
+    build:
+      context: .
+      args:
+        PATH_TO_APPLICATION: ./searchapp-02
+    command: rails server -p 3000 -b '0.0.0.0'
+    environment:
+      - ELASTICSEARCH_URL=${ELASTICSEARCH_URL}
+    ports:
+      - "3002:3000"
+
+  searchapp-03:
+    build:
+      context: .
+      args:
+        PATH_TO_APPLICATION: ./searchapp-03
+    command: rails server -p 3000 -b '0.0.0.0'
+    environment:
+      - ELASTICSEARCH_URL=${ELASTICSEARCH_URL}
+      - REDIS_URL=redis://redis:6379
+    ports:
+      - "3003:3000"
+    links:
+      - redis
+
+  redis:
+    image: redis:alpine
+    command: redis-server
+    ports: ["6379"]