Could I gather the following metrics from VMware vCenter vSphere REST api?
Or is this data only accessible through the Powershell CLI?
Thanks
Unfortunately, there's only a limited subset of metrics available via the REST API and almost all of them are only for the vCenter Appliance itself.
The stats are available from the vSphere Web Services API, particularly the PerformanceManager service.
You can also access that through numerous programing languages (vSphere Management SDK, pyvmomi, rbvmomi, govmomi, etc.), as well as PowerShell/PowerCLI.