Terracloudx offers this software product repackaged where additional charges apply for technical support provided by Terracloudx and Red Hat Enterprise Linux 7.9 with High Availability , email support@terracloudx.com. The Red Hat Enterprise Linux with High Availability image is the foundation to a clustered system that provides reliability, scalability, and availability to critical production services. A cluster is two or more instances (called nodes or members) that work together to perform a task.