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
59 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
592 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
104 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
236 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
27 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
30 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
116 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
votes
0answers
964 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
573 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
95 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
4k 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
29 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
26 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
11 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
35 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
15 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
51 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
115 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
vote
0answers
116 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
vote
0answers
149 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
90 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
57 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
56 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
123 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
85 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
129 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
121 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
39 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
248 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
134 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
244 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
73 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
120 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
21 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
51 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
185 views

Could not ping Solaris KVM Guest from another computer

I setup Solaris Guest using KVM in Ubuntu. I don't have problem pinging host (Ubuntu) to guest (Solaris) and vice versa. Also my Solaris guest can ping other computers in my network but not the other ...
1
vote
0answers
24 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
vote
0answers
399 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
449 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
376 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
79 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
10 views

PPA Pinning, trying to install qemu with glusterfs packages

I need to have glusterfs enabled qemu, however default repository qemu is not built with glusterfs support. I have found a ppa & added it, I made the pinning in apt preferences, however even when ...
0
votes
0answers
42 views
+50

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 ...
0
votes
0answers
87 views

Testing 15.04 livecd with kvm

I am trying to test 15.04 livecd using KVM without success. It boots fine, but when I choose to 'Try Ubuntu', instead of 'Install Ubuntu' on the first screen, it goes to lightdm and asks for the ...
0
votes
0answers
41 views

KVM VM is unable to access internet: help me clean up my networking

I installed Ubuntu Server 14.04 with the intent to set it up with KVM and VMs for many purposes. I've been able to get a few VMs up and running with their own versions of Ubuntu Server 14.04. However, ...
0
votes
0answers
41 views

kvm live migration across ubuntu hosts, how live is live?

I am exploring KVM live migration. I got three VMs running on VMWare workstation. Two of them are KVM hosts and one of them is NFS. The two KVM hosts are ubuntu 14, the one nfs also running ubuntu 14 ...
0
votes
0answers
61 views

Error “KVM disabled by BIOS” during attempt to install Ubuntu 14.10

I recently bought the new HP Notebook - 15-r203tx which comes with DOS. Then I tried to install Ubuntu 14.10. So far, I made a bootable pen drive. But on the Boot menu after choosing the install ...
0
votes
0answers
30 views

Performance of KVM on 32 Bit Ubuntu compared to 64 Bit?

Due to hardware failure, I recently grabbed a harddisk out of an old 32 bit machine and plugged it into a new 64 bit system - powered on, everything good, services outage minimised. Now I am planning ...
0
votes
0answers
39 views

How to access the a qemu virtual machine?

I'm following the tutorial at: https://coreos.com/docs/running-coreos/platforms/qemu/ And I tried to add my ~/.ssh/id_rsa.pub to it so I could access it, using this command: ...
0
votes
0answers
27 views

Is there a way to create a 10G network interface for VMs in KVM2.0?

We have installed & configured the KVM 2.0 (qemu-kvm 2.0.0+dfsg-2ubuntu1.10) on Ubuntu 14.04. The physical server is connected to 10G network, KVM is configured in Bridged mode But the issue is, ...