Questions tagged [paravirtualization]

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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Minishift on GCE portforward to local browser with putty

I have on GCE an Ubuntu 18.04 with paravirtualization that is using kvm to host a minishift VM. I want to expose the console of minishift (e.g.: https://192.168.42.89:8443) through putty without ...
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kvmtool: guest OS fails: mounting /dev/vda on /root failed: No such device

I am trying to load a guest Ubuntu using kvmtool. For this I am running following command. sudo ./lkvm run --disk ~/Downloads/ubuntu-core-16-amd64.img --kernel ~/kvmtool/guest_linux_kernel/linux-4.13/...
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2k views

Cannot connect to EC2 instance after converting Ubuntu 16 PV to Ubuntu 16 HVM

So it's been a few days and I still can not connect to my new HVM instance with EC2 running Ubuntu 16. For reference, I am trying to upgrade our server from an m3 instance running Ubuntu 16, to a C5 ...
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404 views

Citrix XenCenter templates for RHEL 6.x OS

I have Citrix XenServer 7.1 installed on my server. In Citrix XenCenter, I have connected my server and created few VMs. On choosing respective VM templates, OS with 6.x architecture (i.e. RHEL 6.x, ...
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Can the Amazon AMI Operating System (in particular 2016.03) use huge pages on a paravirtual (PV) instance?

I don't believe huge pages work on PV machine running Amazon's AMI OS. I would like to know if this is related to the Amazon OS, or the virtualisation type. I believe huge pages can be enabled (...
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936 views

How can I force xenserver to create a full (not paravirtualized) vm?

Exact opposite of this question: How to makesure VM is in Para virtualization mode on XEN? I've got xenserver 6.2 and nowhere in the UI when creating a VM does it give me the option to use HVM and ...
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How can I track security issues with running kernel under paravirtualisation?

I've got a bunch of client's virtual machines running by various providers who use Xen paravirtualisation. Almost all of these are Debian or Debian based systems. I rely on APT pretty heavily to ...
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Mismatch in SCSI controllers between vSphere and Linux using pvscsi driver

Using RHEL6 and vSphere 5.5. System was previously using LSI Parallel scsi controller. After switching to Paravirtual SCSI controller, the SCSI controllers (and therefor disk IDs) are not matching ...
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Create something like Citrix XenDesktop using Xen [closed]

I am doing an academic project. I want to deploy a Virtual Desktop Infrastructure for my college. So, is there any way/guideline to make something like XenDesktop using Xen on a Linux Distro from ...
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995 views

Use graphical DomU (X11 for Linux, regular UI for Windows) from Dom0 without any GUI on Dom0

I am creating a Xen (para)virtualization setup, with two DomU's: a Windows 10 client install, on HVM, and an Linux client install with X11, on PV. Dom0 is a non-graphical Debian install. So far I have ...
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Can I run multiple Linux instances within a RHEV-M VM?

My overlords have allocated me one VM and externally-routable IP for use on a certain project, and I've since discovered that the software that runs on this is essentially a singleton (no more than 1 ...
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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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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
30k 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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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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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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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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482 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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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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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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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" kernel;...
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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
5k 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: http://www.ioncannon.net/system-administration/1246/converting-from-virtualbox-or-vmware-to-ec2-now-...
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288 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 ...