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The following diagram shows the logical architecture of this solution.
Figure 2. Logical design of OpenShift with PowerFlex CSI on VMware vSphere
The PowerFlex cluster is deployed in a two-layer architecture, using four storage-only nodes and three compute-only nodes. The four storage-only nodes are installed with PowerFlex embedded operating system and the compute-only resources are installed with VMware ESXi hypervisor.
For more information about the hardware used in this solution, see PowerFlex compute-only configuration and PowerFlex storage-only node configuration.
The Red Hat OpenShift Assisted Installer portal is used to install and configure the OpenShift cluster as VMs with RHCOS operating system on the PowerFlex compute-only nodes. The OpenShift cluster that is deployed in this example has three control plane VMs that act as master nodes and three compute VMs that act as the worker nodes of the OpenShift cluster.
The PowerFlex CSI driver is deployed on the OpenShift Cluster compute nodes. The PowerFlex CSI driver allows the OpenShift users to provision and manage persistent storage volumes (PV) from PowerFlex dynamically.