Dell Technologies validated a deployment consisting of:
- 15 Dell PowerEdge R660 servers
- 15 Dell PowerEdge R760 servers
- 4 Dell PowerSwitch S5232F-ON switches
- 4 Dell PowerSwitch S4148F-ON switches
The characterizations in this chapter are representative of this deployment as it was validated in the Dell Technologies testing environment. You can use these characterizations as a guide when building your own specific deployment. Dell Telecom Infrastructure Blocks for Red Hat can be deployed in a variety of sizes. See the Limitations section in the Dell Telecom Infrastructure Blocks for Red Hat Release Notes for a complete list of solution limitations.
The infrastructure cloud runs on three PowerEdge R660 servers. The Dell Telecom Infrastructure Automation Suite nodes are VMs that are hosted on Red Hat Enterprise Linux running Kernel-based Virtual Machine.
- One PowerEdge R660 is used to host one Telecom Infrastructure Automation Suite HA node.
- Two PowerEdge R660 servers are used to host two additional Telecom Infrastructure Automation Suite HA nodes.
The National Data Center (NDC) management cloud and the NDC and Regional Data Center (RDC) workload clouds have the same hardware resources setup. Each of these clouds runs on four PowerEdge R660 servers and five PowerEdge R760 servers as follows:
- One PowerEdge R660 server is used to host the provisioner node.
- Three PowerEdge R660 servers are used to host control plane nodes.
- Three PowerEdge R760 servers are used to host compute nodes and Red Hat OpenShift Data Foundation.
- Two PowerEdge R760 servers are used to host only compute nodes.
The following figure shows the servers as they were set up in the internal testing environment:
- Tested Telecom Infrastructure Blocks for Red Hat cloud sizing acronyms
- CP—control plane
- DTIAS—Dell Telecom Infrastructure Automation Suite
- LDC—Local Data Center
- NDC—National Data Center
- ODF—Red Hat OpenShift Data Foundation
- RDC—Regional Data Center
- SNO—Single Node OpenShift cluster
Management cloud size maximum and limitations
The maximum management cloud size is limited to eight servers total:
- Three Dell PowerEdge R660 servers for control nodes
- Two Dell PowerEdge R760 servers for compute nodes
- Three Dell PowerEdge R760 servers for compute nodes and Red Hat OpenShift Data Foundation storage
This limitation is caused by insufficient disk space in the infrastructure cloud for more than eight installation ISO files. Each server requires its own unique installation ISO file. This limitation does not impact the provisioner node because its operating system is installed at the Dell factory.
Scaling maximums and limitations
Management clouds do not support vertical scaling, scaling down, or horizontal scaling. Workload clouds support horizontal scaling (scaling out), but you cannot scale down or vertically scale (scale up) a workload cloud.
The following table lists scaling maximums for various components that are a part of the Telecom Infrastructure Blocks for Red Hat solution:
Item | Maximum |
Red Hat Advanced Cluster Management for Kubernetes | Manages up to 3,500 single node OpenShift (SNO) clusters. |
Telecom Infrastructure Automation Suite | Telecom Infrastructure Automation Suite (Automation Suite) 2.0 targets an onboarding limit of over 75,000 servers. The maximum number of servers tested on Automation Suite 2.0.1 is 8,500. The Automation Suite 2.0 Telemetry application has been tested to subscribe to metrics data from a maximum of 1,000 Dell PowerEdge servers. |