1. A resource management node comprising: a processor; and a memory coupled to the processor and comprising computer readable program code that when executed by the processor causes the processor to perform operations comprising: for a plurality of guest virtual machines (VMs), determining operational resources of physical host machines available in a distributed computing system that are needed to provide the plurality of guest VMs by operations comprising: measuring electrical power consumption by the physical host machines while the physical host machines are processing the plurality of guest VMs; and for each of the plurality of guest VMs, proportionally attributing the electrical power consumption, which is measured, to the guest VM based on the relative amount of processor resource of the physical host machines that is utilized to process the guest VM; recursively determining an amount of electrical power capacity of cabinets used by each of a plurality of different placements of the plurality of guest VMs on the physical host machines in the cabinets of the distributed computing system using the measured electrical power consumption that is proportionally attributed to each of the plurality of guest VMs, to identify one of the plurality of different placements that satisfies a defined rule for how much electrical power capacity of the cabinets is allowed to be used and how much physical rack storage space of the cabinets is allowed to be used, and that does not result in placement in a same cabinet of a pair of the guest VMs that have been identified as not allowed to be hosted on physical host machines located in a same cabinet; recursively determining an amount of physical rack storage space of the cabinets used by each of the plurality of different placements of the guest VMs on the plurality of physical host machines in the cabinets of the distributed computing system to further identify the one of the plurality of different placements that also satisfies the defined rule for how much physical rack storage space of the cabinets is allowed to be used, and selecting the one of the plurality of different placements further responsive to determining that it distributes the physical host machines among the cabinets to distribute amounts of unused physical rack storage space between the cabinets according to the defined rule for how much physical rack storage space; and controlling placement of the plurality of guest VMs on the physical host machines in the cabinets according to the one of the plurality of different placements that is identified.