Dockerized

Dockerfile

@@ -0,0 +1,20 @@
+FROM ruby:2.4.3
+
+ENV BUILD_PACKAGES="apt-utils build-essential curl less nodejs sudo wget zsh libmysqlclient-dev ruby-serialport libserialport-dev"
+
+# throw errors if Gemfile has been modified since Gemfile.lock
+RUN \
+  bundle config --global frozen 1
+ 
+
+WORKDIR /usr/src/app
+
+COPY Gemfile Gemfile.lock ./
+RUN \
+  apt-get update -qq && \
+  apt-get install -y $BUILD_PACKAGES && \
+  bundle install
+
+COPY . .
+
+CMD ["cd /usr/src/app && ruby smartmeter.rb"]

Gemfile

@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
-gem "activerecord", "3.2.13"
+gem "activerecord"
 gem "mysql2"
 gem "serialport"
 gem "state_pattern"

Gemfile.lock

@@ -1,40 +1,48 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (3.2.13)
-      activesupport (= 3.2.13)
-      builder (~> 3.0.0)
-    activerecord (3.2.13)
-      activemodel (= 3.2.13)
-      activesupport (= 3.2.13)
-      arel (~> 3.0.2)
-      tzinfo (~> 0.3.29)
-    activesupport (3.2.13)
-      i18n (= 0.6.1)
-      multi_json (~> 1.0)
-    arel (3.0.2)
-    builder (3.0.4)
-    daemons (1.1.9)
-    i18n (0.6.1)
-    mail (2.6.1)
-      mime-types (>= 1.16, < 3)
-    mime-types (2.3)
-    multi_json (1.7.7)
-    mysql2 (0.3.11)
-    rufus-scheduler (2.0.19)
-      tzinfo (>= 0.3.23)
-    serialport (1.1.0)
-    state_pattern (2.0.1)
-    tzinfo (0.3.37)
+    activemodel (5.1.5)
+      activesupport (= 5.1.5)
+    activerecord (5.1.5)
+      activemodel (= 5.1.5)
+      activesupport (= 5.1.5)
+      arel (~> 8.0)
+    activesupport (5.1.5)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (~> 0.7)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    arel (8.0.0)
+    concurrent-ruby (1.0.5)
+    daemons (1.2.6)
+    et-orbi (1.0.9)
+      tzinfo
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
+    mail (2.7.0)
+      mini_mime (>= 0.1.1)
+    mini_mime (1.0.0)
+    minitest (5.11.3)
+    mysql2 (0.4.10)
+    rufus-scheduler (3.4.2)
+      et-orbi (~> 1.0)
+    serialport (1.3.1)
+    state_pattern (2.0.2)
+    thread_safe (0.3.6)
+    tzinfo (1.2.5)
+      thread_safe (~> 0.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  activerecord (= 3.2.13)
+  activerecord
   daemons
   mail
   mysql2
   rufus-scheduler
   serialport
   state_pattern
+
+BUNDLED WITH
+   1.16.1

config/database.yml

@@ -1,5 +1,6 @@
-host: 'localhost'
+host: 'smartmeter_db'
 adapter: 'mysql2'
 database: 'smartmeter'
 username: 'root' 
+password: 'rootme'
 pool: 5

db/migrate/001_creates_readings.rb

@@ -1,4 +1,4 @@
-class CreatesReadings < ActiveRecord::Migration
+class CreatesReadings < ActiveRecord::Migration[4.2]
   def change
     create_table :readings do |t|
       t.float :total_kwh_consumed_high

docker-compose.yml

@@ -0,0 +1,16 @@
+version: '3'
+services:
+  db:
+    container_name: smartmeter_db
+    image: mysql 
+    environment:
+      MYSQL_ROOT_PASSWORD: rootme
+      MYSQL_DATABASE: smartmeter
+  smartmeter:
+    container_name: smartmeter
+    build: .
+    command: 'ruby ./smartmeter.rb'
+    volumes:
+      - .:/usr/src/app
+    depends_on:
+      - db