With the release of HashiCorp Nomad 1.0, Nomad Enterprise now includes Dynamic Application Sizing, an expansion of Nomad's existing Autoscaler capabilities.
Nomad 0.11 announced a Technical Preview of the HashiCorp Nomad Autoscaler. This is a new open source project that provides the ability to automatically scale workloads running on a Nomad cluster. It's capable of being easily deployed on Nomad, and it employs a plugin system that allows operators to perform autoscaling in whatever way is appropriate for their workloads.