Environment Variables Defined by the Ruby Buildpack
Pivotal Web Services provides configuration information to apps through environment variables. This topic describes the additional environment variables provided by the Ruby buildpack.
For more information about the standard environment variables provided by Pivotal Web Services, see the Cloud Foundry Environment Variables topic.
Ruby Buildpack Environment Variables
The following table describes the environment variables provided by the Ruby buildpack.
| Environment Variable | Description |
|---|---|
BUNDLE_BIN_PATH |
The directory where Bundler installs binaries. Example: BUNDLE_BIN_PATH:/home/vcap/app/vendor/bundle/ruby/1.9.1/gems/bundler-1.3.2/bin/bundle |
BUNDLE_GEMFILE |
The path to the Gemfile for the app. Example: BUNDLE_GEMFILE:/home/vcap/app/Gemfile |
BUNDLE_WITHOUT |
Instructs Cloud Foundry to skip gem installation in excluded groups. Use this with Rails applications, where “assets” and “development” gem groups
typically contain gems that are not needed when the app runs in production. Example: BUNDLE_WITHOUT=assets
|
DATABASE_URL |
Cloud Foundry examines the database_uri for bound services to see if they match known database types. If known relational database services are bound to the app, then the DATABASE_URL environment variable is set to the first services in the list.
If your application requires that DATABASE_URL is set to the connection string for your service, and Cloud Foundry does not set it, use the Cloud Foundry Command Line Interface (cf CLI) cf set-env command to set this variable manually. Example: $ cf set-env my-app DATABASE_URL mysql://example-database-connection-string |
GEM_HOME |
The directory where gems are installed. Example: GEM_HOME:/home/vcap/app/vendor/bundle/ruby/1.9.1 |
GEM_PATH |
The directory where gems can be found. Example: GEM_PATH=/home/vcap/app/vendor/bundle/ruby/1.9.1: |
RACK_ENV |
The Rack deployment environment, which governs the middleware loaded to run the app. Valid value are development, deployment, and none. Example: RACK_ENV=none |
RAILS_ENV |
The Rails deployment environment, which controls which environment-specific configuration file governs how the app is executed. Valid value are development, test, and production. Example: RAILS_ENV=production |
RUBYOPT |
Defines command-line options
passed to Ruby interpreter. Example: RUBYOPT: -I/home/vcap/app/vendor/bundle/ruby/1.9.1/gems/bundler-1.3.2/lib -rbundler/setup |