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 NSX Transformers 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 NSX Transformers, not available for deployments that use vSphere Distributed Switch or NSX Data Center for vSphere.
Multiple availability zones in one vCenter Server instance are allowed. Clusters from different vCenter Server instances in the same availability zone are not allowed.