I'm trying to create with Vagrant + VirtualBox an Ubuntu 12.04 virtual machine (let's name it VM2) inside another Ubuntu 12.04 virtual machine (VM1). I installed successfully Vagrant and VirtualBox in VM1, but when I'm launching the virtual machine VM2 using vagrant up inside VM1 I have the following error:
default: Warning: Connection timeout. Retrying...
default: Warning: Connection timeout. Retrying...
default: Warning: Connection timeout. Retrying...
default: Warning: Connection timeout. Retrying...
default: Warning: Connection timeout. Retrying...
default: Warning: Connection timeout. Retrying...
default: Warning: Connection timeout. Retrying...
default: Warning: Connection timeout. Retrying...
default: Warning: Connection timeout. Retrying...
Finally it stops booting and I'm not able to create the virtual machine. I saw in VirtualBox forums that is possible to do it, but you mustn't use Virtualization Extensions (AMD-V, VT-X) inside a virtualized server (see this). I disabled this extensions using the following commands:
$ VBoxManage modifyvm VM2 --hwvirtex off
$ VBoxManage modifyvm VM2 --vtxvpid off
$ VBoxManage modifyvm VM2 --vtxux off
But if I try to boot VM2 it's still not working.
At the beginning I was using an Ubuntu-64 box for VM2 but I have read that this extensions must be turned on if you want to boot a 64 bits machine, so my next step was trying to boot an Ubuntu 12.04-i386 box for VM2 but I obtained the same results (default: Warning: Connection timeout. Retrying...). I tried also disabling the AMD-V / VT-X extensions in the 32 bits box but I'm having the same error all the time.
What can I try? Is it possible to boot my virtual machine VM2 inside VM1?
