Paravirtualization is a virtualization technique in which the kernel of the guest OS 'cooperates' with the hypervisor in providing low-level hardware-related functions, instead of relying on slower and much more complex emulation. This requires a modified kernel of the guest OS.

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PXE boot server on a xen PV guest?

I've set up a Xen hypervisor on ubuntu 14.04 and a PV guest also on ubuntu 14.04. I want this PV guest to be a PXE boot server. But when I look at the /boot folder I see that it's empty. I'm a newbie ...
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2answers
4k views

CentOS 7.0 as DomU in XenServer 6.2 SP1; cannot run with PV drivers?

It appears that CentOS 7 cannot work with paravirtualized drivers with XenServer 6.2 I’ve installed one PVHVM guest with the xs-tools package but the drivers fails to connect at bootime. I got this ...
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1answer
1k views

Whole block device named xvda1, xvda2 instead of xvda, xvdb

I am working on a VM that was set up for me in a public cloud. It's running under the Xen hypervisor in paravirtualized mode and has two virtual disks. So I expect the virtual disk block devices to be ...
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0answers
213 views

FreeBSD XEN kernel not booting in XenServer 6.2

I have a XenServer 6.2 host, and I am trying to get a FreeBSD-9.1-i386 guest to run in PV mode. The installation of the guest is fine, but after a reboot with the new kernel the system does not boot. ...
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1answer
135 views

Error: Cannot find ramdisk “hd(0)/boot/grub/menu.lst”

I have a dom0 and try to run domU with config like this: kernel = '/root/xen/dist/install/usr/local/lib/xen/boot/pv-grub-x86_32.gz' ramdisk = 'hd(0)/boot/grub/menu.lst' vcpus = '2' ...
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3answers
2k views

How to makesure VM is in Para virtualization mode on XEN?

I am having a server running XEN,with ubuntu 12.04 as Domain 0. Intel VT is turned on by default and i dont want to run any Windows OS as VM. So 1. how can i makesure that all the created VM will ...
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1answer
175 views

Is it possible to run Windows as a Xen VM without VT, using Qemu-dm?

Is it possible to run windows as a virtual machine under Xen using qemu-dm? If so, how can it be done? Since Xen without VT technology supports only para-virtualization, can qemu-dm, the emulator ...
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2answers
216 views

Why do KVM needs Hardware Assisted support to install even Linux based OS

For XEN we dont need Hardware Assisted support for running linux os. But why do we need that for KVM for running even linux based os. Can Kvm be configured to support para virtualization. Edit: ...
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2answers
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xenserver PV mode — lvm problems?

So, I'm trying to convert some domU's I have to use PV mode. xe-edit-bootloader -u ... -p 2 Finds the menu.lst no problem. The grub, boot, and root partitions are 1, 2, and 3, respectively. I ...
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0answers
139 views

Xen Hosting - What Could Be Causing My Kernel to Not Boot - At All?

I have a VPS at Linode, and I'm trying to boot Gentoo's hardened kernel - which is patched with Grsecurity and PaX. On Linode, you can boot a kernel of your choice by utilizing their "PV-Grub" ...
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Running linux containers (lxc) on ubuntu to isolate web server processes (ruby/thin)

I am trying to setup a server where I would be running multiple apps. Mostly internal but could also be open source projects like Redmine. They would all be Rails/Ruby apps/test scripts running on ...
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1answer
4k views

Does CentOS 6 have Xen-compatible Kernel?

I would to try to convert my VirtualBox image and upload to Amazon EC2, following this tutorial: ...
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1answer
254 views

Does XenServer 5.6's pygrub require initrd?

I'm trying to run Gentoo paravirtualized under XenServer 5.6. Now, Gentoo is perfectly capable of booting without initrd, so my question is: Do I need an initrd for pygrub to work? Earlier ...