A single node cluster refers to a Kubernetes system comprised of a single physical server and is the only deployment model supported by ICE OS. While this effectively defeats the resiliency benefits provided by redundant hardware, it offers a low cost and simple deployment model for applications where large scale and maximum uptime are not required.

A single node cluster running on a 16 core, 2.0 GHz Intel Xeon-based server with 32GB RAM is sufficient for serving approximately 800 concurrently active users (producing a voice load of 19,200 calls per hour). Scale can be increased vertically by adding additional memory and CPU cores.