(very low priority, there are much bigger things in k8s we're not collecting) https://kubernetes.io/docs/tasks/inject-data-application/environment-variable-expose-pod-information/#use-container-fields-as-values-for-environment-variables We do `:field_path => env_var.valueFrom.try(:fieldRef).try(:fieldPath)` but don't handle resourceFieldRef. https://github.com/cben/manageiq-providers-kubernetes/blob/8a0f8f3ffeb7dd9161f0e880e1180f4ac7508db8/app/models/manageiq/providers/kubernetes/container_manager/refresh_parser.rb#L730