Nesting virtual machines
It is possible to create a virtual cluster using a Proxmox hypervisor on top of an existing Proxmox cluster. Due to the performance drop of a nested hypervisor, the use case for a nested cluster is very limited. They can be used in, but are not limited to, the following scenarios:
Practice clusters in a classroom
Test clusters to test the latest software releases before applying them to real environments
Proof of concept clusters to test new configuration ideas
In this section, we will see how to enable the nested feature in Proxmox.
Getting ready
Deploying a nested virtual cluster is very different from deploying on true hardware. Make sure to plan ahead if the nested virtual cluster is going to be used on a physical Proxmox cluster. There must be adequate resources, such as CPU and memory available to support the actual and virtual nested clusters. The nested virtual host can quickly be starved of resources in such an environment since there is a lot overhead due to...
