KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, ...

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virsh: error loading shared libraries: libyajl.so.2 is missing

I just tried to setup some KVMs on RHEL7. My procedure was: yum install qemu-kvm qemu-img yum install virt-install libvirt libvirt-client libvirt-client The I tried out virsh list --all to ...
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2answers
44 views

Install windows 2012 R2 over KVM-virtualizaton

I'm trying to install Windows Server 2012 R2 over linux KVM-virtualization. The installation process stops and requires drivers to continue. I'm trying with virtio drivers from fedora but doesn't ...
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1answer
23 views

Is it possible to install virt manager in client mode?

I have a KVM server (updated to Ubuntu 14.04) for several years now, that I handle distantly with virt-manager under different Linux flavours. I recently formatted and reinstalled my main workstation ...
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1answer
9 views

KVM debian wheezy packages with ceph support

Does anybody know any packages out there for kvm which are compiled with RBD support? I have these installed right now: ii kvm 1:1.1.2+dfsg-6+deb7u8 amd64 ...
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1answer
15 views

How do i find the overcommit ratio for CPU on a KVM host or for that matter on any hypervisor?

I have a host and I have installed KVM on it.Now I need to know how much overcommiting of resources it allows, CPU, memory. Is there some command to get the ratios or it all exists in theory and no ...
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0answers
13 views

How to prevent virt-viewer from asking a password

I am aware of what file I need to create, in order to prevent virt-manager from prompting me for a password. However, I'd like to create a shortcut on my desktop that opens directly the virtual image ...
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0answers
24 views

QEMU USB passthrough is not working

I stuck at getting USB passthrough working with Windows 8.1 guest OS on Ubuntu Server 14.04. I started by installing qemu using the Ubuntu Documentation (https://help.ubuntu.com/community/KVM). The ...
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1answer
16 views

How to edit the XML config file of a domain with virsh? [closed]

How to easily edit the XML config file of a domain with virsh?
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1answer
17 views

kvm/qemu host windows guest BSOD about driver_irql_not_less_or_equal for viostore.sys

I have a KVM/Qemu host running 4 Windows Server 2012 guests and after upgrading the host from Ubuntu 12.04 to 14.04 I get blue screens with a bug check string of "driver_irql_not_less_or_equal" that ...
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0answers
12 views

Monitoring / logging bandwidth usage per KVM on SmartOS?

Usually on a KVM node with CentOS, iptables support is enabled on the bridge (bridge-nf-call-iptables) iptables rules can be used to log the data, 2 chain rules one for incoming and one for outgoing ...
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0answers
9 views

OpenNebula host CPUs count altering

I am playing around with the latest OpenNebula sandbox for VirtualBox. In the "cloud" view, where users can create and delete their virtual machines, the CPU cores dedicated to each machine are ...
1
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1answer
33 views

Creating a virtual network for KVM guests spanning multiple host machines

I have 5 physical machines running Ubuntu 14.04, all of them are together in a network. These all have static IP addresses. Each of these machines has 1 to 4 virtual machines via KVM/QEMU running ...
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20 views

Trouble Switching From non-VLAN to VLAN-Enabled Network with Sophos Gateway

Nasty conundrum here. Some background: I have a Sophos UTM ASG220 serving as gateway device for a number of networks, with a Cisco 2960 network switch, and a raft of Red Hat 6.6 servers running KVM ...
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2answers
26 views

Add a network bridge to Ubuntu and lost internet and lan connection

I'm trying to make network bridging to work on a Ubuntu 15.04 (I'm experimenting in order to make a QEMU/KVM virtual machine that will be visible to the outside network as if it were a distinct ...
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0answers
26 views

Putty SSH connection timed out but OVH KVM ok

I dont know why today SSH give me an error but i can ping server and connect to SSH via OVH panel with KVM I reboot my server, load new config in putty, change try alive option to 200, change user ...
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1answer
12 views

enable vnc after virt-install

I've created a virtual machine using virt-install with graphics --none. I want to enable vnc. I've tried virsh -c qemu:///system qemu-monitor-command vm171-SC-1 --hmp change vnc :3 but it doesn't ...
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3answers
371 views

Is it safe to boot a linux server from a USB drive?

I have an HP DL360 G7 server I plan to install KVM and ZFS on. The purpose is going to be a lab in a box. I have the 8 drive bays in the front loaded with 4 drives and an SSD (for the ZFS ZIL cache). ...
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1answer
12 views

Kickstarting RHEL7 VM stalls with “No device selected”

I've been using Ashgar Ghori's RHEL7 study guide and have hit a small snag which I have not been able to find a solution to. Using a kickstart file that worked previously, whenever I use it for a new ...
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0answers
14 views

Configuring additional static IP for Guest Machine

I am trying to bind my Guest machine to respond on my second public IP address. Sometimes it works automatically by DHCP just by configuring my MAC address, sometimes it doesn't work at all. All I ...
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0answers
21 views

Stucking qemu-kvm process

What i have: CentOS 7.1 as KVM host - Xeon E3-1200 v2, 32GB RAM, with and without dedicated raid controller (i tried both options) 3x Ubuntu 14.04.2 as quest VM (3 CPU, 512MB RAM on each VM) host ...
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2answers
27 views

Creating several kvm bridges over tagged bond

I have the following configuration in a RHEL6.5 which works great. # ifcfg-em1_2 DEVICE=em1_2 HWADDR=C8:1F:66:D8:77:D2 TYPE=Ethernet ONBOOT=yes NM_CONTROLLED=no MASTER=bond0 SLAVE=yes USERCTL=no ...
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1answer
39 views

Is there any way to lock/unlock a Hosted Engine in oVirt?

I have a weird situation with my Hosted Engine in oVirt. We have an oVirt cluster set up using gluster as the storage for the engines isos and all the information. About a week ago two of the three ...
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0answers
17 views

Openstack Icehouse - Hypervisor (KVM) cpu_mode config

I have installed Openstack Icehouse, using the guide located here, and I am trying to find out what 'cpu' is exposed through the hypervisor to a VM. I have found this guide in order to configure the ...
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2answers
29 views

Virtualization: vCPU pinning with Hyperthreading Host CPU?

I'm using KVM/libvirt on a Linux server with Core i7-2600 CPU, which has the following CPU topology (1 Socket, 4 Cores, 8 Threads): Physical | Logical ---------+-------- Core 0 | 0, 4 Core 1 | 1, ...
1
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1answer
33 views

KVM Bridged connection not forwarding ports?

Host and guest are both CentOS 6. Guest has an admin panel listening on port 15672 that I am unable to access from the outside. From the guest, curl localhost:15672 and curl vm1:15672 give me the ...
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2answers
136 views

Linux Routing with two NICs (LAN vs Internet) with NAT and bridging for VMs

My Setup: There is only one physical machine in this setup, a Host System for Virtual Machines (VMs) with two network adapters. One NIC (eth0) is connected to an internal network (LAN subnet, e.g. ...
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1answer
100 views

Installing VM on CentOS 6.6 with virt-install hangs

I'm trying to install a Centos 6.6 VM on a CentOS 6.6 host with the following command. virt-install \ --name vm-queue \ --description "Queue Server" \ --ram 2048 \ --disk ...
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0answers
16 views

mdadm and LVM high load and IOwait

I've got a new CentOS 6.6 server with 2 HDD with mdadm & LVM. As I've used the CentOS install CD I assume everything should be aligned properly. I've just written a KVM image to a LVM LV using dd ...
3
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1answer
82 views

Qemu+libvirt+kvm significant performance lag in VM's

I am troubleshooting poor performance on our new VM host machine which is a Dell PowerEdge R415 with hardware RAID. We've got about 20 VM's running like this: qemu-system-x86_64 \ -enable-kvm \ ...
0
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1answer
60 views

Unable to import Ubuntu virtual machine on Centos 7 kvm host

[root@kvm ~]# virsh create /root/ns1.jesse64.xml error: Failed to create domain from /root/ns1.jesse64.xml error: internal error: process exited while connecting to monitor: qemu-kvm: -machine ...
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0answers
14 views

Unable create/access storage pool in a KVM

I have trouble using storage pools in my KVM setup. I get the following error message whenever I try to use a pool-* command in my virsh shell. virsh # pool-list error: Failed to get the number of ...
0
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2answers
58 views

Should I backup from within each guest, or from the host?

I'm searching for advice on whether backups are better taken from within a guest (e.g. ShadowProtect), or from within the host (e.g. copying virtual disk files, or other software). We have 12 VM's (a ...
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0answers
17 views

virsh console is “eating” keyboard input

A system upgrade messed up the sshd options in my virtual server (no matching cipher found), and while trying to get a serial console over virsh console, it seems to be "eating" or ignoring some key ...
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0answers
35 views

How use namespaces and fabric

I am using python and fabric, I have a hypervisor (KVM) defined as follows: env.hypervisor_address = 'hypervisor' # 192.168.0.250 From one VM (in the hypervisor) I want to SSH to other VMs with ...
0
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1answer
21 views

Low Screen Resolution on SLES 11.3 KVM guest

I have a SLES 11.3 guest running on KVM on an Ubuntu 14.04 host. When I installed the OS, I selected 'vga' as the QEMU display type. Now that the guest is up and running I cannot change the display ...
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0answers
25 views

Linux router showing packet loss

I have two linux boxes that are using a third box as a router. Packets flow normally. BoxA(10.0.0.10) -> (10.0.0.20) RouterBox (172.16.50.20) -> BoxB(172.16.50.30) When I run mtr from BoxA to BoxB the ...
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0answers
18 views

How to use baseimage and deriverd image to create VMs in ceph cluster?

Scenerio: Suppose I have a template disk image and I want to use this to create many VMs by using this template file as a baseimage and derived image for different VM instances. in qemu we can use ...
0
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1answer
47 views

KVM Networking trouble

I'm running KVM on a centOS 7 server and it has been working fine, but occasionally the network connections to the virtual machines seams to drop and the virtual machines can't be reached until the ...
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0answers
59 views

kvm guest routing with 2 default gateways

I have a kvm guest with two virtual NIC. NIC with internal IP III.III.III.III (eth0) NIC with external IP EEE.EEE.EEE.EEE(eth1) I'm using macvtap. The host has his own external IP. I can ping ...
0
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1answer
71 views

Backup kvm Virtual Machine with lvm

I'm new to virtualization and have been searching for a while for a flexible disk format for setting up a kvm VM, after some reading i decided to go with lvm. And did set up the disk and the ...
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0answers
30 views

KVM NIC passthrough “device already in use”

I have a server with 2 NICs 01:00.0 Ethernet controller: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 (rev 01) 01:00.1 Ethernet controller: Intel Corporation Ethernet Controller ...
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0answers
41 views

Failed to create OpenNebula VM

I'm trying to instantiate a virtual machine from the OpenNebula sunstone. The frontend is a CentOS machine with the sandbox installed. The two hosts are ubuntu 12.04 32 bits machines, and they can all ...
0
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0answers
35 views

Filtering KVM guests with IPtables

My partner has a server with OVH that receives a constant variety of ddos attacks, while still staying up. We want to use IPtables on the host to filter the guests VM's traffic. The guest VM we want ...
0
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0answers
55 views

OpenNebula glusterfs cannot create on volume

I try to create a VM on my gluster volume, it fails with the following message: Wed May 20 20:37:30 2015 [Z0][DiM][I]: New VM state is ACTIVE. Wed May 20 20:37:30 2015 [Z0][LCM][I]: New VM state is ...
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4answers
143 views

Bare metal hyper-visor that supports viewing it's own guests [closed]

I'm trying to understand if it is possible to have a Type-1 Hypervisor (bare metal, no host OS) with the ability to view the guest(s) operating system(s) on the same machine. i.e. I have a XenServer ...
0
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1answer
125 views

Enabling Qemu/KVM Filesystem Passthrough Centos 7

I have a system running Centos 7 with the stock qemu/KVM code. I have several virtual servers running on this system and would like to enable the filesystem passthrough option. So far, I have not ...
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0answers
45 views

Why are Windows XP and 7 qemu/kvm guests not recognizing updates to a local Samba share?

I develop cross-platform software and test the Windows ports with wine, Windows XP, and Windows 7, the latter two tested using qemu with KVM. I also have several versions of OS X and Debian Wheezy as ...
0
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0answers
110 views

qemu-img snapshot on live VM

I have created multiple KVM VMs using QCOW2 images. Each VM has its own qcow2 file and is not based on any backing file. My question is specifically related to snapshots of QCow2 images on these ...
0
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1answer
44 views

ubuntu kvm disk io slowdown after some tyme

Host system: Ubuntu Server x64 12.04 mdadm raid 1 (/dev/sda /dev/sdb) no lvm dd bs=1M count=256 if=/dev/zero of=filename conv=fdatasync avarage ~ 40 MB/s NCQ on disks is disabled WriteCache is ...
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0answers
15 views

Will KVM cpu utilization affect other KVM hosts? [duplicate]

I have got 4 kvm host with a total of 4 cpus cores assigned (on a intel core i7 3ghz). If one kvm host will take high cpu utilization (like 100%) will it affect to the other kvm hosts?