Instance or Virtual Machine Deployment in OpenStack
Instances or virtual machines run the applications and services that support individual users and entire lines of business. These instances or VMs must be properly designed, provisioned, and managed for the efficient operation of the associated applications and services.
Instance Design Decisions
The following table lists the virtual machine design decisions made for this architecture design.
Table 78. Virtual Machine Design Decisions
| Decision ID | Design Decision | Design Justification | Design Implication |
|---|---|---|---|
| For this design, <Customer> has made the decisions listed in this table. | |||
| Virtual machine hardware version 11 will be used. | This is a greenfield deployment and no previous versions of VMware ESX® are involved. | Cannot migrate to older ESXi hosts. | |
| vCPUs will be assigned to VMs as required. | VMs may be oversized. | ||
| VMXNET3 is used on the management cluster for VMs where the guest OS supports the type. | Best network performance. | Additional features of the VMXNET3 driver will not be available unless configured. | |
| VMware Tools will be installed in all virtual machines. | Adds appropriate drivers and enhancements to the tools. | Not available for ALL operating systems. |