The third hypervisor choice on our OpenNebula environment could be one of the VMware virtualization products such as VMware ESXi. It is a lightweight bare-metal hypervisor given for free (but it is not open source like KVM and Xen, thus requiring a free registration to obtain a serial number).
Although the current VMware driver supports VMware ESX and VMware Server products, here we will cover only ESXi as it is simpler to configure and because the other two are becoming legacy software. VMware itself advices its customers to migrate existing deployments to VMware ESXi.
The installation on the host is really simple, you just need to download and burn the ISO available from the link https://www.vmware.com/tryvmware/?p=free-esxi5&lp=default&ext=1, boot from your CD/DVD, and follow the Easy Wizard for the installation.
During the installation, your hardware is checked to make sure it meets the minimum requirements for ESXi, which are as follows:
A 64 bit CPU with...