7.2. Cartridge Environment Variables

OpenShift Enterprise provides three environment variables for all cartridges by default. These variables are read-only.

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Table 7.2. Cartridge Environment Variables
Name	Value
OPENSHIFT_{Cartridge-Short-Name}_DIR	The directory where cartridge information is installed.
OPENSHIFT_{Cartridge-Short-Name}_IDENT	The identity of the cartridge, sourced from its `manifest.yml` file. The format is `Cartridge-Vendor:Version:Cartridge-Version`.
OPENSHIFT_PRIMARY_CARTRIDGE_DIR	The directory where the primary cartridge on a gear is installed. For example, a scaling PHP application has both a PHP cartridge and a HAProxy cartridge installed on the head gear. In this case, the PHP cartridge is the primary cartridge.

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