Comment 1 for bug 1933955

So a possibility is to just use the in-driver cache to generate the cache, as it should have data representing what the is comprised inside the nova-compute process's conductor group view of nodes, so the counts *should* match, and removing it won't result in a list of all nodes in the ironic database if the cache is used. If memory serves, the code in the nova.virt.ironic driver which uses caching also will get the nodes *if* the cache is not populated and if memory serves it gets refreshed as resource tracking updates run.