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Virtualization: Guest in guest?
Is it possible to run a virtual machine under a virtual machine ?
- I thought of this the other day. I wonder if you can measure the performance loss the deeper the VM's go. A VMware inside a Hyper-V inside a VMWare? Hmmm... inside virtualbox?Jason Taylor– Jason Taylor2011-09-29 17:31:37 +00:00Commented Sep 29, 2011 at 17:31
- 32 words: VM Inception!Tablemaker– Tablemaker2011-09-29 17:40:46 +00:00Commented Sep 29, 2011 at 17:40
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5 Answers
Possibly, but not with ahrdware acceleration - the processor only has one ring 0. For the hyper-visor.
The sense of it is academic, though - it makes NO sense from an admin perspective.
- ...but Linux kernel 3.1 is going to add this functionality. With all the problems.mailq– mailq2011-09-29 17:02:11 +00:00Commented Sep 29, 2011 at 17:02
esxi 4.1 can virtualize itself.
- As can Linux's KVM. avikivity.blogspot.com/2008/09/…sciurus– sciurus2011-09-29 18:01:42 +00:00Commented Sep 29, 2011 at 18:01
Yes it is known a nested virtualization. Here is a paper on same http://www.xen.org/files/xensummit_intel09/xensummit-nested-virt.pdf relative to Xen from Intel.
Yes, it is possible with bare-metal hypervizors, and is very common for virtualization lab environments. Not generally recommended for production though.
http://www.vcritical.com/2009/05/vmware-esx-4-can-even-virtualize-itself/
Sure. For some reason not long ago I was running QEMU as an ARM emulator inside Fedora inside VMWare Server on a Windows XP desktop.
It worked well enough.
