LXD
Powerful system container and virtual machine manager
...It provides flexibility and scalability for various use cases, with support for different storage backends and network types and the option to install on hardware ranging from an individual laptop or cloud instance to a full server rack. When using LXD, you can manage your instances (containers and VMs) with a simple command line tool, directly through the REST API or by using third-party tools and integrations. LXD implements a single REST API for both local and remote access. The LXD project was founded and is currently led by Canonical Ltd with contributions from a range of other companies and individual contributors.