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The OpenShift Container Platform 4.6 Reference Architecture design requires a minimum of four servers for a three-node cluster, with each node running as both a control-plane node and a compute node. A three-node cluster can be expanded to a standard cluster if required. You can also expand the standard cluster with more compute nodes at any time. The maximum configuration that the customized Dell Technologies deployment tools support is 210 servers.
This guide uses a server-node baseline configuration for the PowerEdge R640 and PowerEdge R740xd, PowerEdge R650 and PowerEdge R750 server nodes that can be used in each node role. Appendix A shows the PowerEdge server baseline configurations that we used. For compute nodes that require add-in devices such as GPUs, Dell Technologies strongly recommends using PowerEdge R740xd or R750 servers.
The following table shows the hardware configuration that is required to build the cluster design that we used for our validation:
Node name |
Quantity |
Configuration |
CSAH |
2 |
PowerEdge R640/R650 server configuration |
Controller |
3 |
PowerEdge R640/R650 server configuration |
Compute |
2 or more* |
PowerEdge R640/R650 or R740xd/R750 server configuration |
*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:
Quantity* |
Description |
Dell Technologies reference |
1 |
Rack enclosure: APC AR3300 NetShelter SZ 42U |
|
1 |
Management switch: Dell EMC Networking S3048-ON |
|
2 |
Data switch: Dell EMC Networking S5248F-ON or Dell EMC Networking S5232-ON |
|
7-210 |
CSAH, Control-plane: Compute nodes: or Dell EMC PowerEdge R740xd/R750 or Dell EMC PowerEdge XE2420 |
or or or |
2-4 |
Power distribution unit: APC metered rack PDU 17.2 kW |
APC Metered Rack PDU AP8867 - 0U - 208V 3Phase IEC 309 60A 3P+PE Input / (30) C13 Output |
*Rack enclosures and power distribution units are site-specific. Review the physical dimensions and power requirements in a site survey.