Ready Stack design limits

The Ready Stack for Red Hat OpenShift Container Platform 4.6 design requires a minimum of four servers for a three-node cluster, with each node running as both a controller node and a compute node. A three-node cluster can be expanded to a five-node cluster if required. You can also expand the five-node cluster with more compute nodes at any time. The maximum configuration that the customized Dell Technologies deployment tools support is 210 servers.

Server, switch, and rack configuration

This design guide uses a server-node base configuration for the PowerEdge R640 and PowerEdge R740xd server nodes that can be used in each node role. For compute nodes that require add-in devices such as GPUs, we strongly recommend PowerEdge R740xd servers. Appendix A shows the PowerEdge server baseline configurations that we used in the design. The following table shows the hardware configuration that is required to build the cluster design that we used for our validation work:

Table 8.              Cluster configuration: Number of servers

*A three-node cluster does not require any compute nodes; however, to expand a three-node cluster with additional compute machines; you must first expand the cluster to a five-node cluster with two additional compute nodes.

The following table provides additional cluster configuration information:

Table 9.              Cluster configuration: Reference information

*Rack enclosures and power distribution units are site-specific. Review the physical dimensions and power requirements in a site survey.