Rails 4 - cannot get ENV variables in production - ruby-on-rails-4

Question

I am trying to get my ENV variables in production mode ...
but now way .. cannot reach the server ... the SECRET_KEY_BASE is not found ... if I hardcode it , then go trouble w the database creds, and if I hardcode them, got trouble w the SMTP creds...
this means that no ENV[] variables cannot be reached ...
I added the gemfile to get it in :production environment, and bundled it
gem 'dotenv-rails', :groups => [:development, :test, :staging, :production]
my .env file is present in my remote server ( Ubuntu 14 - w .rbenv Ruby 2.0 , Rais 4.2 )
cat /var/www/workshop/shared/.env
SECRET_KEY_BASE=106063d5146566142b6aa4782b874115c73a61ac2505f11f8e
DATABASE_USER_NAME=myself
DATABASE_PASSWORD=mydbpwd
MAILGUN_SMTP_SERVER=smtp.mailgun.org
MAILGUN_SMTP_USER_NAME=postmaster#mydomain.com
MAILGUN_SMTP_PASSWORD=2fc998a7399999999a264b88c
MAILGUN_SMTP_DOMAIN=mydomain.com
I set my secrets.yml file on the remote server
cat secrets.yml
production:
secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>
I set my database.yml
cat database.yml
production:
adapter: postgresql
database: workshop
encoding: unicode
pool: 5
username: <%= ENV['DATABASE_USER_NAME'] %>
password: <%= ENV['DATABASE_PASSWORD'] %>
and I updated my config/environments/production.rb w smtp creds
cat production.rb
.....
# SMTP settings for mailgun
config.action_mailer.smtp_settings = {
:port => 587,
:address => ENV['MAILGUN_SMTP_SERVER'],
:user_name => ENV['MAILGUN_SMTP_USER_NAME'],
:password => ENV['MAILGUN_SMTP_PASSWORD'],
:domain => ENV['MAILGUN_SMTP_DOMAIN'],
:authentication => :plain,
:enable_starttls_auto => true
}
...

Answer 1

Finally I gave up w .dotenv in production...
I resolved using Rails 4.1 secrets.yml...
as I am deploying w capistrano 3 ,
- I use the gem capistrano-upload-config
- I created : secrets.production.yml , database.production.yml, configuration.production.yml
- I added in my capistrano deploy.rb
set :config_files, %w{config/database.yml config/secrets.yml config/application.yml}
set :linked_files, %w{config/database.yml config/secrets.yml config/application.yml}
capistrano uploads these productions files from the local .production files and link them... so
the server database.yml is loaded/linked (from local database.production.yml)
the server secrets.yml is loaded/linked (from local secrets.production.yml)
the server application.yml is loaded/linked (from local application.production.yml)
regarding the production.rb SMTP settings , I use the secrets file :
:address => Rails.application.secrets.mailgun_smtp_server,
...
all these files are in .gitignore