A VM class is a template that defines CPU, memory, and reservations for VMs. If you want to create a custom vmclass you can use dcli or vSphere UI.
Following is an example using dcli:
❯ dcli +server vcenter-server-fqdn +skip-server-verification com vmware vcenter namespacemanagement virtualmachineclasses create --id best-effort-16xlarge --cpu-count 64 --memory-mb 131072
This will create a vmclass with 64 vCPUs and 128GB memory with no reservations.
❯ dcli +server vcenter-server-fqdn +skip-server-verification com vmware vcenter namespacemanagement virtualmachineclasses create --id guaranteed-16xlarge --cpu-count 64 --memory-mb 131072 --cpu-reservation 100 --memory-reservation 100
This will create a vmclass with 64 vCPUs and 128GB memory with 100% reservations.
Note: You will need to attach this newly created vmclass to a supervisor namespace to use it.
Here is the documentation reference: https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-with-tanzu-services-workloads/GUID-18C7B2E3-BCF5-488C-9C50-937E29BB0C48.html
Hope it was useful. Cheers!
