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Choosing node roles for overcloud deployment and planning the correct network topology are some of the most crucial steps that is mandatory for successful deployment of RHOSP environment.
Type |
Node Description |
Count |
Notes |
SAH node |
Dell EMC PowerEdge R740 or R640 server |
3 |
The SAH is an administrative node which hosts infrastructure VMs like DNS, NTP, undercloud, PowerFlex Gateway and so forth. |
Overcloud controller |
Virtual machine |
3 |
These VMs provide administration, networking, and HA for RHOSP. VMs are configured with Cinder and installed with SDC to communicate with PowerFlex storage-only node. |
Overcloud compute-only nodes |
PowerFlex appliance R640 or R740 |
2 |
These nodes provide computing resources and use SDC to communicate with PowerFlex. |
PowerFlex storage-only node |
PowerFlex appliance R640 or R740xd |
4 |
These nodes provide storage to compute nodes using PowerFlex. |
Network Switch |
Cisco or Dell Switches |
2 |
vPC/VLT configured across the switches |
Note: For a virtualized control plane, the hard limit for baremetal compute nodes depends on the provisioned resources for control plane. For more information, see Deployment Limits for RHOSP. For complete baremetal deployment, see Recommendations for large deployments.