Changes requested by @yivo

Dockerfile

@@ -31,7 +31,8 @@ RUN su app -s /bin/bash -c "bundle install --path /opt/vendor/bundle"
 # Copy the main application.
 COPY . $APP_HOME
 
-RUN chown -R app:app /home/app
+RUN chown -R app:app /home/app && \
+    mv config/database.yml.example config/database.yml
 USER app
 
 RUN bundle exec rake tmp:create assets:precompile

config/charts/barong/templates/_helpers.tpl

@@ -37,7 +37,7 @@ It is pre-install hook, so we don't have secrets created yet and we need to use
 - name: COOKIES_SECRET_KEY
   value: ""
 {{- if .Values.db.password }}
-- name: DATABASE_PASS
+- name: DATABASE_PASSWORD
   value: {{ .Values.db.password }}
 {{- end }}
 {{- end -}}
@@ -66,7 +66,7 @@ Environment for barong container
       name: {{ template "fullname" . }}
       key: cookiesSecretKey
 {{- if .Values.db.password }}
-- name: DATABASE_PASS
+- name: DATABASE_PASSWORD
   valueFrom:
     secretKeyRef:
       name: {{ template "fullname" . }}

config/database.yml.example

@@ -2,8 +2,10 @@ default: &default
   adapter:  mysql2
   encoding: utf8
   pool:     <%= ENV.fetch('RAILS_MAX_THREADS', 5) %>
-  username: <%= ENV['DATABASE_USER'] %>
-  password: <%= ENV['DATABASE_PASSWORD'] %>
+
+  # Optional variables may be omitted in development environment.
+  username: <%= ENV.fetch('DATABASE_USER', 'root') %>
+  password: <%= ENV.fetch('DATABASE_PASSWORD', 'root') %>
 
 development:
   <<: *default
@@ -15,4 +17,8 @@ test:
 
 production:
   <<: *default
-  database: barong_production
+
+  # Mandatory variables. Must be set in environment.
+  database: <%= ENV.fetch('DATABASE_NAME') %>
+  username: <%= ENV.fetch('DATABASE_USER') %>
+  password: <%= ENV.fetch('DATABASE_PASSWORD') %>