Now the VM is ready for nested virtualization. Select the Processor tab, then the Enable Nested VT-x/AMD-V checkbox and click OK. The system settings are divided into a series of tabs. Click on the System icon, and the dialog box displays the VM's system settings. The Settings dialog box contains a series of icons that run along the left side of the window. Once you create the VM to host the nested copy of VirtualBox, open the VirtualBox Manager, right-click on the VM and then choose the Settings command from the shortcut menu. You must create a VM before you can enable nested virtualization. Generally, admins launch nested virtualization in VirtualBox on a per-VM basis. Version 6.1 adds support for Intel processors. Oracle supports nested virtualization on a limited basis in version 6.0 but only for certain AMD CPUs. To use VirtualBox nested virtualization, run version 6.1 or higher.
This strategy protects the virtual environment from VMs that overwhelm memory or other resources. Then the user can create VMs on an as-needed basis but cannot consume more resources than what you allocate to the VM with the nested VirtualBox copy. With nested virtualization, you can give a user access to a VM that runs a nested copy of VirtualBox. To set up VirtualBox nested virtualization, you install VirtualBox onto the OS, create a VM and then install a copy of VirtualBox on that VM. VirtualBox users can virtualize Oracle VM Server or KVM within its VMs. VirtualBox is a free, open source hypervisor from Oracle that runs on a variety of VMs and supports nested virtualization.
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