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, kvm-...

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Openfiler as KVM guest does not recognize drives

Team, I am using openfiler as a KVM guest, I have provisioned virtual drives and can see them when I login to the openfiler cli and run fdisk -l. I cannot however configure them from the openfiler ...
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2answers
812 views

Solidworks: activation license mode is not supported in this virtual environment (Qemu-KVM)

The question is not around Solidworks actually, so please continue to read. The whole idea of virtualization is to be hardware independent. Before our eyes a whole new dependency level is being ...
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66 views

Ubuntu 14.04 Dektop libVMI installatoin

In Ubuntu 14.04 I install KVM and successfully created Win 7 guest, Info: Kvm version: QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.19), Copyright (c) 2003- Now I am following this link ...
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2answers
516 views

Backup of KVM raw-images

` Hi,guys! I'm running qemu-img-0.12.1.2-2.355.0.1.el6 on CentOS 6.3 using raw images for my virtual machines. Is there any way to safely backup guests, without stopping them? I've tried to make ...
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1answer
83 views

VM-VM only network with KVM

I'm trying to create a VM only network where guests can speak to each other, but not with the host. I want to isolate the host for security reasons, as multiple test users will be using the VMs. ...
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1answer
10 views

How can I set the vnet number for my KVM VM?

I need to ba able to sniff the vnetX interface that is created for a KVM VM when it starts. The problem is, the X in vnetX is automatically incremented from 0 with each VM. I've read somewhere that ...
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2answers
35 views

Why is Windows 7 64 bit not recognising my IDE HDD in KVM?

I'm trying to run Windows 7 64 bit on KVM on Ubuntu 14.04.3 LTS (GNU/Linux 3.16.0-46-generic x86_64). If I install Windows 7 32 bit, the windows installer recognizes the IDE HDD, but the 64 bit ...
2
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1answer
361 views

dhcp not assigning gateway

So I am running a dev server for KVM virtual machines. I have a DHCP server running locally on the host node with the following configuration: /etc/dhcp/dhcpd.conf ddns-update-style none; default-...
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21 views

KVM - Reassembly of packets done by virtual bridge interfaces

I've 2 guest OSs in KVM based setup, talking to each other using a virtual bridge(VBR) Client--Device1--(VNET1)----VBR----(VNET2)Device2--- Server I see that the packets are getting fragmented by ...
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1answer
264 views

KVM: how to resize guest VM disk via LVM

on the Debian host nl-ams02c-kvm02 there is CentOS guest VM nl-ams02c-ispbgp02. i resized the corresponding LVM like : root@nl-ams02c-kvm02:~# lvextend -L +10000G /dev/raid50/nl-ams02c-ispbgp02 root@...
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115 views

Use host's VGA output from virtual machine

Is there a way to stop a host OS from using its VGA port (on the motherboard) and allow a VM to use it instead with KVM-QEMU? I have read about VGA pass-through, but all the discussion I've found on ...
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70 views

enable ssh over virtual machines running on kvm

I am trying to connect to a virtual machine running on KVM hypervisor from a host machine (Ubuntu 14.04) through ssh, but it is giving me the following error: ssh: connect to host 10.117.82.2 port 22:...
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1answer
150 views

KVM hypervisor swap

I've had my first CentOS 7 KVM host setup for about a year now, it is a dual quad-core machine with 32GB of physical memory. I have a dozen VM's running with a total allocated memory of 23GB. This ...
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1answer
4k views

network configuration (bridging) proxmox

I bought yesterday an proxmox license. All works fine only the network configuration is very complicated. My network configuration: 84.200.50.186 -> hostsystem ip 84.200.50.186 -> VM ip 255.255....
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103 views

kvm network bridge on centos 6

I have a Centos 6 KVM host. I installed the KVM following this manual: https://wiki.centos.org/HowTos/KVM Its network has been configured as a bridge: [root@server ~]# ifconfig br0 Link encap:...
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1answer
1k views

Delete “orphan” libvirt snapshot

I am trying to live-snapshot using KVM as per this procedure. I must have messed up at some point because I'm in a state I don't understand. My VM is called prod. It was created in file /srv/vm/prod....
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1answer
89 views

port forwarding with libvirt

I'm trying to get port forwarding working through libvirt on top of QEMU and KVM. I found this article (https://snippets.webaware.com.au/howto/running-qemu-with-port-redirection-through-libvirt/), but ...
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2answers
228 views

How do I connect to my libvirt/qemu/guests ? (with no ip address)

I have inherited the administration of a trusty ubuntu server with several virtual servers, also ubuntu using libvirt and qemu. I have the problem I cannot connect to these virtual servers/guests. ...
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0answers
113 views

How to configure HW, OS, network for virtualization with VMDq and SR-IOV features [closed]

I have: SUN X4100 M2 Intel Ethernet Adapter E1G42ET (VMDq and SR-IOV supported) Linux Ubuntu 14.04 Server (host machine) May setup 15 KVM as hypervisor I want some virtual guest machines (linux) ...
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1answer
67 views

Server abandons set static ip and returns to dhcp given address

I have a few virtualized (ubuntu 14.04 LTS) servers under KVM that I'm trying to move to an ip block other than the one reserved for servers under dhcp (the 10.10.2.0/24 block). I change the ip and ...
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1answer
666 views

Best options for KVM/qemu/libvirt VM migrations without shared storage

My team has recently been tasked with improving the virtualization infrastructure at the company and one thing we're looking into doing is speeding up migrations. We use local storage only on all VM ...
2
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1answer
2k views

Backup of running KVM qcow2 VPS

I want a robust method of taking backup of KVM VPS of qcow2 file, while running. After searching for a long time I found that we can use rsync for live backup. I used following command for rsync: ...
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0answers
115 views

KVM - graphic passthrough

My PC have two PCIs and installed CentOS 7. I followed this Document about PCI Passthrough I added iommu and enabled BIOS VT-D grep iommu /boot/grub2/grub.cfg linux16 /vmlinuz-3.10.0-229....
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2answers
195 views

How to install a guest OS in a minimal installation of Centos using KVM?

KVM newbie here, so be tolerant plz. I am trying to install a guest OS in a minimal installation of Centos7. I've been looking for tutorials around the web but all seem to be using a graphical host ...
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0answers
11 views

KVM Error While Deploying Existing Image

I have KVM running with 2 VM's. I tried backing up one of the images by copying it and then deploying using virtual machine manager using that existing image, that fired up fine. Now the second backup ...
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1answer
101 views

Expanding/Growing OCFS2 forever

I have a kvm environment where a shared disk mounted by 2 VMs through rbd ceph. What I would like to know that in the future how is it possible to expand OCFS2 filesystem what I planning to use on top ...
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2answers
257 views

qemu-kvm take 100% cpu during start Win 7

I have Centos 6 with qemu-kvm version: qemu-kvm.x86_64 2:0.12.1.2-2.448.el6_6.4 On Dell Precision with 2x Xeon 5110 When I run VM qemu-kvm process take 100% of CPU and starting Windows on ...
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0answers
165 views

XFS/EXT4: Why is actual file size on disk larger than apparent size? Clarification

On a CentOS 7.1.1503 (3.10.0-229.el7.x86_64) system running KVM/qemu on an XFS filesystem, I'm attempting to work out what specifically is adding additional space to a VM diskimage file. $ ls -ls --...
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2answers
430 views

Installing Windows on KVM with LVM disk

I am trying to install a windows server 2012 on a KVM. The host system is Ubuntu Server 14.04. I would like to use a logical volume, say /dev/VG/win, as main device for the guest system. However, the ...
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1answer
57 views

KVM guest static ip with ports forwarded to another guest

Im on host-machine with Centos 7 and 2 guests on Centos 6.6. I want one of my guests have static external ip but some his ports must be routed to another guest. On host machine I do: iptables -t nat ...
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1answer
41 views

Proper iptables rules to allow Guests network connection

I have a KVM running on Ubuntu 14.04 with a few guests (mostly CentOS7) behind NAT configuration. It seems the guests can't reach the internet connection if the following firewall rules are activated ...
0
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1answer
148 views

KVM TFTP Boot / WDS

I installed all my Chef Infrastructure, PXE install of my Linux VM's, Preseed/Kickstart, etc. via KVM on my local server (Host OS is Debian 8). Installing a new Linux VM is a piece of cake with that ...
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1answer
197 views

Remote desktop connection to kvm virtual machine starts working after vnc-logon?

I am running a Windows XP on kvm inside my debian system. Everything runs smoothly and I can connect via VNC as well as via Remote Desktop. VNC connection is naturally supported right from boot up ...
1
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1answer
61 views

Multiple public IPs routed via Cisco ASA to Proxmox VMs

I have a network with IP 199.221.2.136 (/29). I would like the Cisco ASA5505 [1] to work on .137 as router and use two public IPs (.138 and .139) on two VMs on a Proxmox server. Not sure how to route ...
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2answers
130 views

IP conflict on a KVM bridge network connection

We're running a CentOS 7 server, with KVM installed on top of it, and the host has 2 Ethernet interfaces attached to it (em1 and em2). A new windows 7 VM was just created, and we wanted that specific ...
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283 views

How to use vhost-scsi with Intel P3700 NVME SSD in KVM

I am using proxmox beta 4 in my HP DL 380 server with KVM. I configured Intel P3700 NVME - nvme0n1 as Virtio and on windows server 2008 r2 with virtio-scsi driver. I am getting 100 K random IOPS ...
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2answers
138 views

Shared filesystem between KVMs

If I want to have shared fs between multiple kvm machines what is the best way to go when I'm already using ceph. I accessing my kvm disks directly through rbd devices but with ext4 on top of this ...
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0answers
13 views

Determining what type of virtualisation used on VPS/VDS? [duplicate]

I bought VPS/VDS and want to know what virtualization used. I have a root prompt in Debian Linux.
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2answers
137 views

KVM host won't use memory for caching

I have a KVM host (Linux 3.14.32) running 8 virtual machines. They are overprovisioned (memory allocated for them is greater than available physical memory on the host). However they consume only ...
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0answers
166 views

Host cpu association with numa node not reflected in guest

In host NUMA node 0 has cpus 0-7 and 16-23 NUMA node 1 has cpus 8-15 and 24-31 But in guest NUMA node 0 has cpus 0-7 and 16-31 NUMA node 1 has cpus 8-15 only My Question is why NUMA node cpu ...
0
votes
1answer
118 views

Installed KVM, but Virtual Machine Manager says localhost(QEMU)

My understanding is that KVM uses the CPU virtualization properties and is much faster than QEMU, which is emulation. I used the Virtual Machine Manager to create the virtual machine. I am nearly ...
1
vote
1answer
22 views

Checking for disk failures and issues in a VM

If you host with a provider who runs a RAID 10 or another RAID based system and your in a VM. Are you able to check for disk failures or RAID failures from within the VM or does it require host based ...
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1answer
22 views

RHEL6 undo virtual client rhel6 [closed]

I am running rhel6 on my laptop. I was playing with the Open Client Go Virtual and accidently installed a KVM image of RHEL6. It runs the full virtual machine. I want to unregister, delete and reclaim ...
2
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1answer
72 views

KVM fastest network between 2 guests

I wonder if there is any way to speed up the network communication between 2 KVM guests on the same physical machine. Would that help at all if I would configure a separate bridge network for just ...
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0answers
112 views

Set custom cpu string for qemu/kvm

I have some virtual machines with software, which licensing check depends on cpu string. They're running on kvm - with default cpu string value - which is QEMU Virtual CPU version 1.7.1 After ...
3
votes
1answer
71 views

ganeti network: change bridge name

I try to add an instance to network, first first I need to connect the network to a bridge. I'm using bridge vbr0 instead of standard xen-br0, gnt-cluster info shows that ganeti has the default set ...
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0answers
378 views

virsh shutdown not working on linux guest

Solution to this issue is usually installing acpi on the guest vm and making sure the vm has the following: <features> <acpi/> <apic/> <pae/> </features> I have that, ...
0
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1answer
239 views

Import a vm image to a new host machine with virt-manager

I need to recover a guest machine with Windows 2003 on a new host server on Centos 7 with virt-manager. I've shut down a guest machine and simply copied its .img file from /var/lib/libvirt/images. ...
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2answers
136 views

Iptables on Centos 7 doesn't work after reboot

I am on Centos 7, removed the new firewall and installed a classic iptables service. I have a guest machine in it with Debian 8.1 and static external ip. I do: echo 1 > /proc/sys/net/ipv4/...
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3answers
2k views

Exporting libvirt+KVM virtual machines to files

I am going to retire an old libvirt + KVM server, but I need to preserve the VMs. Unfortunately, the network is down and I cannot create connections to the system. Is there any way to export the VMs ...