You can add compute clusters and datastores to an existing VMware Integrated OpenStack deployment.
Adding Compute Resources from Multiple vCenter Server Instances
You can add multiple vCenter Server instances to your VMware Integrated OpenStack deployment, if you use VMware NSX-T as virtual network provider. By adding more instances, you improve scalability and resiliency for your OpenStack infrastructure.
Requirements for Adding Compute Resources from Multiple vCenter Server Instances
You can add multiple vCenter Server instances, if the following requirements are met:
High Availability deployments only, not available for compact mode deployments.
Virtual network must be provided by VMware NSX-T, not available for deployments that use vSphere Distributed Switch or VMware NSX for vSphere .
You can have only one availability zone per vCenter Server instance.