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Re: Virtualization inside a virtualizer, discussions

PostPosted: 13. Jan 2016, 19:31
by Matei
This is an old thread, but I wanted to point out for reference what seems to me a legitimate use case of virtualization inside virtualization not mentioned in here, which is: running Docker inside a Windows VM (which, I understand, uses VBox under the hood). The motivation would be using a purely Linux host to test the deployment of Linux-based software to Windows indirectly via Docker. Is this currently possible?

Re: Virtualization inside a virtualizer, discussions

PostPosted: 13. Jan 2016, 20:08
by scottgus1
To the extent that one stays within the available capabilities. VT-x/AMD-V does not get through the first guest to be used in the second guest. So any 2nd-layer guest that requires VT-x/AMD-V will not run. Single processors only, no 64-bit, no 32-bit-requiring-VT-x. Older 32-bit may run but may (will?) be slow. Suitability for testing may be slim.

Re: Virtualization inside a virtualizer, discussions

PostPosted: 15. Mar 2016, 23:45
by AnrDaemon
Matei wrote:This is an old thread, but I wanted to point out for reference what seems to me a legitimate use case of virtualization inside virtualization not mentioned in here, which is: running Docker inside a Windows VM (which, I understand, uses VBox under the hood). The motivation would be using a purely Linux host to test the deployment of Linux-based software to Windows indirectly via Docker. Is this currently possible?

Docker is NOT A VIRTUALIZATION. It is an ISOLATION. See the note above about LXC.

Re: Virtualization inside a virtualizer, discussions

PostPosted: 18. Mar 2016, 22:20
by IAX
I can't believe this hasn't been issued. A use case is to have a Guest Linux VM and you want to test with vagrant some configurations with multiple machines, and test ansible playbooks.

This feature works perfect in VMWare:
VMWare VM.jpg
VMWare
VMWare VM.jpg (103.06 KiB) Viewed 2780 times


Not In VirtualBox:
VirtualBox VM.jpg
VirtualBox
VirtualBox VM.jpg (117.2 KiB) Viewed 2780 times

Re: Virtualization inside a virtualizer, discussions

PostPosted: 18. Mar 2016, 22:21
by Martin
So what's new? We already know that this feature doesn't exist in Vbox.

Re: Virtualization inside a virtualizer, discussions

PostPosted: 16. Dec 2016, 21:23
by sej7278
Martin wrote:So what's new? We already know that this feature doesn't exist in Vbox.


well it kind of did in 4.x (i ran esxi under vbox until 5.0) and as it seems like the only logical feature left to implement, it would seem like a nice thing for vbox 5.2, actual functionality rather than copy'n'paste or broken audio like 5.1 has focused on

Re: Virtualization inside a virtualizer, discussions

PostPosted: 16. Dec 2016, 22:42
by Martin
Features are added when a commercial customer pays for them, or when volunteers donate the code... ;)