Questions about the Kernel-based Virtual Machine, an open source virtualization infrastructure to use the Linux kernel as a hypervisor.

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3
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0answers
88 views

disable and enable KVM on demand?

Thanks to this great site, I think that I know how to disable KVM for the purpose of installing/running VMWare: sudo rmmod kvm_intel kvm Now, if I want to re-enable it (without rebooting Ubuntu, ...
3
votes
0answers
625 views

KVM-Guest only boots single user mode

We have a Vserver Host running on Ubuntu 12.04 with KVM/QEMU and so far guests been running fine with various OS's (Ubuntu 10.04, 12.10, Debian 6,7, CentOS 5,6). After the installation of Ubuntu ...
3
votes
0answers
112 views

How do I run a PXE server?

I'm going to run several virtual machines with KVM virtualization. In order to install guest systems over PXE protocol, I am going to run a PXE server on my host machine (I'm not doing it wrong, am ...
3
votes
0answers
265 views

How do I make wireless bridged networking work with linux guest in kvm/qemu?

I am running the ubuntu 13.10 cloud image on kvm/qemu. The guest networking works fine operating in NAT mode when on wireless. Wired bridged networking (eth0 + macvtap) works fine as well. When ...
2
votes
0answers
67 views

QEMU-KVM with VLANS and no bridges

Please be gentle, I'm both a novice Ubuntu user and novice networking guy. I'm trying to put together a virtual server to support a couple of telephony applications at my office. Both applications ...
2
votes
0answers
129 views

Virtualization limits for Ubuntu Server 14.04 LTS with KVM

Essentially I'm after something like this, but for Ubuntu Server 14.04 LTS. I'm trying to create some KVM guests with very large 1TB+ RAM (through OpenStack Nova). I can boot the 1TB VM fine, but I ...
2
votes
0answers
41 views

How to invoke a X Session and a VM instead of login prompt

The system is Ubuntu 12.04 but the OEM requirement is to make it appear as if it is a Windows system to the end user. Other VMs and daemons will be active in the system but it is controlled from ...
2
votes
0answers
144 views

Apparmor KVM Ubuntu 14

I am running Ubuntu 14.10. I am trying to install KVM guest. When I try to do so with VNC I get following apparmor error in syslog: kernel: [ 3016.448241] audit: type=1400 audit(1423018183.349:51): ...
2
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0answers
1k views

KVM GPU Passthrough

now i know this issue has been talked about before, but those topics are old now and slightly out dated. So I have recently been following a few different guides on getting this system working, ...
2
votes
0answers
682 views

Ubuntu 14.04: with bridge on wlan, no internet on kvm guests

I'm trying to be a "high-lander" sticking to KVM plus virt-manager to manage my VMs. But it's about a week I'm around trying to create a bridge that works for using with my VMs. I tried first tried ...
2
votes
0answers
103 views

Creating a user called 'root'

I am creating Virtual Machines using the ubuntu-vm-builder. The syntax goes something like this: ubuntu-vm-builder kvm precise \ --domain newvm \ --dest ...
2
votes
0answers
5k views

kvm error in syslog says cpu0 unhandled rdmsr

I have a server that hosts about 20 KVM guest machines. It's syslog is, at times, flooded with messages like these: 00:17:36 vhost-server kernel: [ 157.835078] kvm: 3138: cpu0 unhandled rdmsr: ...
1
vote
0answers
19 views

What is the cloud image default login?

I downloaded ubuntu-14.04-server-cloudimg-amd64-disk1.img and create a VM from it using virsh. It boots up fine and I get its IP address except that it looks for a configuration server. However it ...
1
vote
0answers
20 views

pci-passthru in Ubuntu KVM 14.04.2 on ppc64el

I'm working on Ubuntu 14.04.2 for ppc64. Is pci passthrough work on this version? We're using Mellanox nics. pci-assign: echo "0006:01:00.0" > /sys/bus/pci/drivers/pci-stub/bind ...
1
vote
0answers
57 views

Multi-headed Gaming VM Host on Ubuntu Server

I am trying to build a multi-headed gaming system based on an Ubuntu Server 15.04 host with either Windows or Ubuntu/Linux Mint guests. I have gotten the systems nearly working with Linux Mint/Ubuntu ...
1
vote
0answers
59 views

Manual for building a virtual machine with kvm

Using this manual I want to build a VM. However, the manual seems rather outdated: It talks about using Hardy on i386 architecture (I'm running Vivid on an x86_64). Also, ubuntu-vm-builder is no more ...
1
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0answers
48 views

graceful shutdown of libvirt virtual machines on host shutdown

I have a Windows 8 installation on a KVM virtual machine, runing on my Ubuntu 15.04 host. When I issue the shutdown option in virt-manager, or virsh shutdown windows, the virtual machine cleanly shuts ...
1
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0answers
23 views

BIND configured, DNS configured. No joy!

I have a GoDaddy domain, I've adding host names (ns1, ns2 of the domain through GD), I've pointed the name servers to my VPS server IP. So we are ok so far, great. I've resorted to install VestaCP on ...
1
vote
0answers
87 views

vmbuilder won't build “trusty” (14.04 LTS)

I can use this command to create a working VM running the "precise" (12.04 LTS) Ubuntu release: vmbuilder kvm ubuntu -v --suite=precise \ --libvirt=qemu:///system --arch=amd64 \ --cpus=2 ...
1
vote
0answers
186 views

kvm bridge dropping packets

Periodically one or more of the guests lose network connectivity. We are getting packet loss only in vms. Setup: We're running 3 KVM guests, all Ubuntu 12.04 LTS using bridged networking. OS on ...
1
vote
0answers
75 views

dns problem in guest after host connection to vpn

I configured linux guest in kvm runing on ubuntu14.04 host. It runs without any problem and has no issues with DNS. After connecting host to VPN (OpenVPN), guest is not resolving anything from DNS ...
1
vote
0answers
57 views

KVM guest can not access host using CIFS

I have a situation with a guest running on Ubuntu KVM than can't access SAMBA shares on the same host where guest is running. I would like to use samba for file sharing between host and guests. Guest ...
1
vote
0answers
50 views

Best setup for virtual machines

Today I have a Ubuntu Server with one lan connection (eht0) and two internet connections with one provider dedicated ip each (eth1 and eth2). I would like to change this setup to a new Ubuntu Server ...
1
vote
0answers
30 views

what is the effect of making my kvm's HD cache none vs default?

I am playing with KVM migration, and I got an error about unsafe migration due to hdd cache settings. I found the fix, which is to set the cache to none and it works after I made the change. But ...
1
vote
0answers
128 views

How to configure promiscuous mode rejected in KVM bridge?

I am using Ubuntu 14.04 (3.13.0-45-generic #74-Ubuntu SMP) as Host OS. KVM version 2.0.0 I have disabled promiscuous mode in guest Virtual Interfaces along with corresponding host vnet & bridge ...
1
vote
0answers
184 views

Can ping but cannot wget on host with bridge interface

This is driving me mad, since I have spent the las two days trying to solve this. I have an Ubuntu Server 14.04.2 LTS with KVM and libvirt. I have two guests virtual machines: pfSense-2.2: virtio ...
1
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0answers
193 views

KVM: Multiple bridges over single NIC

In my KVM host (Ubuntu 14.04 LTS) I want to setup one private network for the guests with static IP and internet access. Host is on a remote machine. I've the following configuration in the ...
1
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0answers
220 views

Configure private network within a Ubuntu 14.04 LTS KVM host

For learning purpose, I've got one low cost dedicated server to setup kvm host with Ubuntu 14.04 LTS. I'm completely new to this area. First of all I want to setup a private network within the host. ...
1
vote
0answers
147 views

Critical random slowdown issue using KVM/QEMU

I'm having a critical issue with KVM/QEMU which is severely impacting one of my projects and I don't know where to put my hands. I've set up a brand new physical server configured with a 2 x Intel ...
1
vote
0answers
104 views

How can I stop KVM guest from pausing on grub menu

I'm using virt-manager to create a VM from a qcow2 image that I previously created. I pre-configured the image to skip the grub screen unless Shift is held down but the first time I launch the VM ...
1
vote
0answers
82 views

can not install kvm on my ubuntu

i have a ubuntu desktop 12.04 64bit on vmware. with vmware i already turn on VT-x ( my CPU is intel). Now i want to install kvm on this ubuntu virtual machine. 1. type: egrep -c ‘(svm|vmx)’ ...
1
vote
0answers
222 views

Trying to install KVM

hwr44ever@hwr44ever-Latitude-D630:~$ sudo apt-get install qemu-kvm libvirt-bin bridge-utils virt-manager Reading package lists... Done Building dependency tree Reading state information... Done ...
1
vote
0answers
138 views

qemu: how to select from which hdd to boot?

I want to connect 2 hdds to my qemu virtual machine. One of them is actually a file connected via virtio, and I want it to be the bootable drive. The other is a partition that I want to pass through; ...
1
vote
0answers
166 views

Why does Ubuntu still use a blacklisted graphics card claimed by stub?

I am following Multiheaded NVIDIA Gaming using Ubuntu 14.04 + KVM tutorial and it seems like everything went well except that my ubuntu installation still shows HD7970 under Additional Drivers which ...
1
vote
0answers
149 views

How to enable promiscuous mode in a KVM virtual NIC?

How to enable promiscuous mode on an Xubuntu 14.04.1 host? How to enable promiscuous mode in a KVM virtual NIC? (using virt-manager if possible.)
1
vote
0answers
49 views

Ubuntu KVM guest uses only 1 out of N cores - even under load

I have a web application server running Ubuntu 12.04 as a KVM guest. What I have seen is that even under heavy load only one core is being used extensively. It is not an issue of the application not ...
1
vote
0answers
351 views

Restoring a VM to LV, GRUB disk not found

This is what my setup looks like: ubuntu 14.04 running KVM with libvirt has a HW-Raid it's running from (/dev/sda) and another HW-RAID (/dev/sdb) that is the PV to a LVM VG called "datavg" with ...
1
vote
0answers
202 views

How to install qemu-kvm from source

I previously installed kvm via apt-get. Then I install qemu from source via following steps: wget http://wiki.qemu.org/download/qemu-2.1.91.tar.bz2 cd qemu-2.1.91 ./configure make && make ...
1
vote
0answers
285 views

Bridge wireless and ethernet to KVM

I've just installed a new laptop with Ubuntu 14.10 Desktop and I'd like to get try and get KVM running so that I can host a couple of guest VM's. The problem is I can't figure out how to configure the ...
1
vote
0answers
87 views

Server crashed but why?

could someone tell me what causes the crash of this kernel panic? This machine (14.04.1) is a virtual machine on my KVM host (14.04.1) See the screenshot My host machine has 32GB of RAM and uses ...
1
vote
0answers
150 views

Automount USB disk (ntfs) and use files for libvirt/qemu/kvm?

When I plugin my NTFS USB disk it gets auto-mounted. That's fine. But when I want to use files for libvirt/kvm/qemu virtualizaztion they cannot be accessed. Sadly I cannot find the parameter or option ...
1
vote
0answers
25 views

Need commands to fetch Guest VM OS version from Xen and KVM

I m looking for the commands that can be executed to fetch the OS Version of the VMs running on the below Hypervisors. Xen (Not the citrix Xen server, but the Xen Sever hosted on a ubuntu Machine) ...
1
vote
0answers
57 views

Deploy ubuntu with MAAS fails

I have a problem with the Ubuntu deploying with MAAS. I'm trying to install Ubuntu on a KVM virtual machine. The boot with pxe works, I see the login prompt during the deploying, the server connect ...
1
vote
0answers
27 views

KVM image size has changed?

We had a 180GB VM image. Inside the guest VM everything is OK and hdd size is 180G. but when we look the image size on the host it is 475MB. I am afraid that if we restart, the VM wouldn't work. I ...
1
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0answers
489 views

Virtualizing Windows 7 with qemu-kvm SATA Issues

I am working on virtualizing a windows 7 image using kvm on Ubuntu 12.10 64 bit. Here are the specs for my machine: CPU: Intel i7-2860WM ,8G RAM I am using an image created with WinImage of a ...
1
vote
0answers
514 views

Can't ping KVM guest from another computer

I've set up several KVM guest OSs on my Thinkpad laptop. These guests are all on the 192.168.122.0/24 subnet, while the host OS are in the subnet 192.168.1.0/24 together with another laptop(Dell) of ...
1
vote
0answers
455 views

Build Ubuntu VM using mirror

In kvm, using virt-install I can create centos images using this parameter in my virt install command. -l http://mirror.umd.edu/centos/6/os/x86_64/ Starting install... Retrieving file .treeinfo... ...
1
vote
0answers
103 views

What facets should I consider when deciding which guest to jail in (“full”) KVM and which in LXC?

Currently I am migrating to a new server. The old one ran 10.04 as host system and a few more 10.04 and Debian 6 as KVM guests. This was alright, because the processor had support for virtualization. ...
0
votes
0answers
9 views

“Openbox-Message: A window manager is alredy running on screen 0”

I have a problem with creating a remote graphical connection to my Ubuntu 14.04.1 LTS server (GNU/Linux 3.13.0-32-generic x86_64). I've already tried everything I can find on google and forums. I ...
0
votes
0answers
14 views

Keyboard and Mouse Sharing Software that isn't Synergy

I have two Windows machines and one Ubuntu machine that I want to control with one keyboard and mouse. Synergy works half way for this, but since the Linux machine has two monitors and Synergy doesn't ...