vSphere was released in 2009, with the 4.1 incremental release arriving in July of 2010. As with prior versions, ESXi (as well as ESX) is VMware’s hypervisor that is the critical piece vSphere. For anyone wanting to experiment with vSphere features, work with testing updates, or set up a lab environment to practice for training purposes; a virtualized lab environment can be very valuable.
ESXi can be installed as a guest operating system for these and other non-production purposes. In this gallery, the steps required to install virtual machine running ESXi will be performed on an ESXi host. While this is a capable function of the platform, it is not supported and should not be used for production workloads.