An Azure service that is used to provision Windows and Linux virtual machines.
You can run below Resource Graph Query
Below query extract all D services VMs supporting SPOT for European region.
SpotResources
| where type =~ 'microsoft.compute/skuspotpricehistory/ostype/location'
| where sku.name matches regex @'(?i)Standard+_(?i)D[0-9]+_v[0-9]'
| where properties.osType in~ ('linux','windows')
| where location in~ ('westeurope', 'norteurope')
| project skuName = tostring(sku.name), osType = tostring(properties.osType), location, latestSpotPriceUSD = todouble(properties.spotPrices[0].priceUSD)
| order by latestSpotPriceUSD asc