installer/docs/user/environment-variables.md

Environment Variables

The installer accepts a number of environment variable that allow the interactive prompts to be bypassed. Setting any of the following environment variables to their corresponding value, will cause the installer to use that value instead of prompting.

General

Environment Variable	Description
OPENSHIFT_INSTALL_BASE_DOMAIN	The base domain of the cluster. All DNS records will be sub-domains of this base.
OPENSHIFT_INSTALL_CLUSTER_NAME	The name of the cluster. This will be used when generating sub-domains.
OPENSHIFT_INSTALL_EMAIL_ADDRESS	The email address of the cluster administrator. This will be used to log in to the console.
OPENSHIFT_INSTALL_PASSWORD	The password of the cluster administrator. This will be used to log in to the console.
OPENSHIFT_INSTALL_PLATFORM	The platform onto which the cluster will be installed.
OPENSHIFT_INSTALL_PULL_SECRET	The container registry pull secret for this cluster.
OPENSHIFT_INSTALL_SSH_PUB_KEY	The SSH key used to access all nodes within the cluster. This is optional.

Platform-Specific

Environment Variable	Description
OPENSHIFT_INSTALL_AWS_REGION	The AWS region to be used for installation.
OPENSHIFT_INSTALL_LIBVIRT_URI	The libvirt connection URI to be used. This must be accessible from the running cluster.