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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KVM virt-clone while the VM is running

Is it possible to clone a running kvm machine without tools like virt-clone? They already have the original vm in production, I cannot shut it down. If I don't care about temporary data corruption ...
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0answers
9 views

How to configure and use qemu-guest-agent in Ubuntu 12.04? My main aim is to get the IP address of guest VM from Host machine

In the documentation it is not very clear that how to install and use qemu-guest-agent in Ubuntu 12.04. So can anyone help me out ? http://wiki.libvirt.org/page/Qemu_guest_agent It is a daemon ...
2
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1answer
38 views

How to measure boot time of a VM from host machine?

On both Guest machine and host machine, I am using Ubuntu 12.04. As a hypervisor I am using KVM. I want to perform some experiments related to boot-storm and I have created all other scripts to ...
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0answers
27 views

netcat not listening on desired port

When I want to listen on desired port on one server, I use netcat ie: nc -l 8888 Then I can verify the server is actually listening on that port: netstat -tlnp | grep 8888 tcp 0 0 ...
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1answer
27 views

Networking in Linux KVM

I want to know if there is any other way other than using linux bridges to interconnect interfaces from two virtual machines ? Since I am trying to run private spanning tree implementation in virtual ...
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0answers
12 views

ISCSI drives suddenly lost partitions

We have a VM host, and each VM is given an ISCSI volume to boot off of. These ISCSI volumes are stored on a second server. Today, we had to reboot the VM host because ISCSI hosts kept going into ...
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0answers
20 views

kvm guest wont power off after network kickstart installation finishes

I'd like to be able full automate the creation a KVM guest, so I need the KVM guest to power off, so that the virt-install command returns. Unfortunately the guest doesn't power down, but end with: ...
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1answer
24 views

Using a pfSense guest to firewall/route traffic for other guests

I was curious if this falls into the "why..." category or not. I have a dedicated, hardware UTM (Untangle) that's serving as an edge device with two hosts and a dozen guests behind it. Right now, I ...
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0answers
29 views

KVM Aggregate Throughput Limited at 1Gb - Virtio Queues Limiting Factor?

I have a KVM host with three NICs and can't get traffic between guests (in same subnet) above 1gbps aggregate. Is this by design and the only way to achieve >1gbps to use multiqueue support? So far, ...
2
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1answer
52 views

Pass an USB hub from a KVM host to a guest with libvirt

I have the following USB devices on a Linux server: # lsusb -t /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/2p, 480M |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/6p, 480M ...
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3answers
87 views

KVM guest is unable to access the internet

I have a Debian host that has several allocated IPs and KVM with a Debian guest using a bridged network. The guest is completely unable to reach the network, including the LAN or even the host. ...
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0answers
26 views

How do I configure KVM guest to have Internet access?

I am trying to get KVM working on my Debian server and I am having a slight problem with networking with my guest OS (also Debian). The virtual machine is using the "default" network (without a ...
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1answer
43 views

routing a second public IP to multiple VM's

myself and a friend have rented a dedicated server and have used KVM and libvirt to create virtual machines for us to use. (we are using debian jessie on the host) we purchased two additional IP ...
0
votes
1answer
26 views

Iptables overridden after reboot in Ubuntu server

On my Ubuntu server (installed KVM and Kimchi), I noticed that the iptables are changed after a reboot. Unfortunately I did not find out which script is responsible for these changes. I tried to ...
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2answers
38 views

Enabling bridged connections with a single network card with multiple IP addresses

I have a server with one network card in it (eth1). My server is assigned 5 public IP addresses and it is currently configured like this (/etc/network/interfaces): # The primary network interface ...
3
votes
2answers
67 views

attaching usb dongle to KVM VM

I'm struggling to connect a usb device, that gets detected correctly by the host, to a kvm vm. I have a freshly installed Ubuntu Server 14.10 as KVM/QEMU host. I set up an Ubuntu vm using this ...
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0answers
37 views

QEMU/KVM port forwarding issues

I'm trying to access websites hosted on a QEMU/KVM debian virtual machine from a Ubuntu host machine and other PCs/devices on the host machine's network. Later, I'd like to access this from the ...
1
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1answer
99 views

Set up network interfaces in Ubuntu for KVM virtual machine

I am currently renting an Ubuntu server. On this machine I would like to run virtual machines using KVM. For some web access I have installed Kimchi, a very simple html5-based KVM management tool. ...
3
votes
1answer
41 views

What is fastest way to copy a sparse file? What method results in the smallest file?

BACKGROUND: I'm copying a sparse qcow2 VM image that is 200GB in size, but has 16GB of allocated blocks. I've tried various methods to copy this sparse file within the same server and have some ...
0
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1answer
86 views

Installing a Windows guest with virtio in a single step (Debian)

I am trying to create a Windows 7 (32bits) with virtio disk and network in a single step using virt-manager. I've been trying to follow the step-by-step procedure here. However there is no such ...
0
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1answer
69 views

Extremely slow disk IO in qemu-kvm VM

I have a VM running Debian Woody (kernel 2.4.18). Qemu-2.1.2, 2 CPU cores, 512M RAM, qcow2 image connected as IDE, ext3. The issue is that disk IO is slow. Here is a result of dd "benchmark" right ...
1
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0answers
45 views

Multiple KVM QEMU virtual machine instances slow down

I've set up a brand new physical server configured with a 2 x Intel Xeon E5504 (4c/4t) and 16GB of RAM. I have installed Ubuntu Server 14.04.1 (linux-image 3.13.0-44-generic) along with KVM ...
0
votes
1answer
65 views

Running Vagrant/libvirt: trying to establish public/private networks

I'm running Vagrant 1.7 (from their official 1.7 packages) on Ubuntu 14.04 LTS and I'm trying to provision several private VMs and one public one. My Ansible provisioning scripts change all the ...
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2answers
40 views

How do I make KVM images with LVM partitioning be thinly provisioned with a max growth size?

BACKGROUND: Up to now, I have been provisioning VMs as follows: Create template/gold VM: Create new CentOS 6.6 VM with raw 200GB disk (1 .xml file, 1 .img file) LVM partitioning with: /boot, swap, ...
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2answers
88 views

Need to restart iptables after server shutdown

I have a server acting as host (KVM), proxy and firewall. In order to access the services provided by the virtual machines in this host, iptables must work in order to redirect the packets properly to ...
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0answers
31 views

SolusVM KVM-Virtualisation: Add IPs from multiple Subnets to VPS

I would like to add IPs from different networks to my SolusVM-KVM-Virtualisation. The virtualisation is working fine and is accessible via 81.95.3.xxx. But other IPs I added (82.199.134.xxx) are not ...
2
votes
2answers
112 views

PFsense https connections unusably slow

I have a very strange issue with PFsense as router running in KVM with CentOS 7. https connections are incredibly slow (10KB/s or less), and uploads over https simply don't work; for example using ...
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0answers
89 views

KVM Windows guest macvtap host device bridge no access to network but DHCP works

KVM on CentOS 7, guest OS windows 7 x64, I need the guest to have direct access to network and let my network infrastructure to handle IP addressing. In virt-manager, I set NIC to: source device => ...
0
votes
1answer
22 views

What's a good way to check KVM networking status?

I'm running several KVM with libvirt on a debian wheezy host. I want to check networking (maybe more later on) on the guests and if it is not available, restart the guest in question. Is there ...
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votes
1answer
35 views

KVM vCPU: Creating VPS with more GHz

I was trying to find a suitable answer to my question about if it is possible to create 2 x 3 GHz guest on a host server that has 6 cores running at 2 GHz. As I understood I would have 12 GHz total ...
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0answers
99 views

CentOS 6.6 - Additional public IP through aliasing in VM with bridged network

The scenario: A CentOS 6.6 virtual machine with a working public IP assigned to its eth0 via bridged networking (details about the setup below). The problem: I would like to add an additional public ...
2
votes
1answer
106 views

Ubuntu 12.04.2 LTS Server - Randomly hangs with no logging

My server randomly hangs and becomes unresponsive without any logging (dmesg, syslog, kern.log, boot.log, and messages). I cannot predict when it is going to happen. Sometimes the server runs fine for ...
0
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0answers
18 views

kvm guest not able to reach anything other than host

I'm trying to setup KVM on a vm in my esxi instance. The vm is ubuntu 14.04 and I have enabled virtualization for my vm. I want to use bridged networking for the setup. I can get the guest up and ...
0
votes
1answer
74 views

libvirt and host firewall

Hiho! I'm using libvirt with kvm and that works great. My desire is to lock down the host system using a host firewall. Up to today I always used shorewall as my iptables mangement utility of choice. ...
0
votes
1answer
213 views

Installing Windows 2012 KVM Guest on Ubuntu 14.10 - unable to VNC into guest

I have a Ubuntu 14.10 (x64) host, and I am using KVM to setup a Windows 2012 R2 guest VM on it. I am using the virt-install command to set things up. I have setup a bridge network in ...
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0answers
46 views

gluster libgfapi HA

I was exploring KVM_qemu with gluster distributed storage. My goal was to build a test cluster with complete HA . i.e HA for VMs as well as gluster storage . I'm planning to setup a 3 node gluster ...
1
vote
1answer
122 views

Promiscuous mode in KVM

I have cloud system based on Openstack Icehouse-version. Now I want to test newer version of Openstack (Juno) inside my existing cloud. All hosts and guests use Ubuntu 14.04 as their OS. KVM is ...
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votes
1answer
81 views

Windows Server 2012 R2 under KVM [duplicate]

Usually I deal with Linux and other Unix-like OS, but now I have to set up Windows server to run some specific software. I can't have physical box for it, so I decide to buy and deploy Windows Server ...
1
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0answers
86 views

Can't get a PowerKVM guest's network to work

I've been stuck by this issue for a couple of days. I am running a Ubuntu 14.04 guest on top of a PowerKVM host (PowerKVM is KVM on IBM's Power Systems, so basically it's just KVM.). I can't get the ...
0
votes
0answers
37 views

Strange performance issues on CentOS KVM guests

I have a very basic hypervisor server. It is based on consumer hardware and does have some quirks, so I'm not excluding hardware issues. Guests on this machine have strange performance issues, it ...
1
vote
0answers
45 views

Debian KVM Host, Debian guests : where full-disk encryption should be done?

I have a host under Debian Wheezy, running qemu/KVM. I want to have all my guests fully-encrypted. I can see to possibilities : - Either I encrypt the LVM Volume using dm-crypt (cryptsetup) and use ...
1
vote
0answers
66 views

intel xeon e3 1231 v3 server load

I'm running a server with a single Intel Xeon E3-1231 v3 processor which is used as a virtual machine host (host OS is CentOS 7 and I'm using the KVM hypervisor via virt-manager). I created 4 virtual ...
1
vote
1answer
91 views

KVM bridged network like in virtualbox

I have a server with 3 NIC's with OpenSUSE 13.2 and KVM installed. I have installed Debian as guest. My network is 192.168.88.0/24, DHCP server is at 192.168.88.1. Now I want my guest to also get a ...
0
votes
2answers
168 views

internal error: unable to execute QEMU command 'cont': Resetting the Virtual Machine is required

I try to install a kvm img in my vps, but after i install it, it show root@wz:~# virsh list Id Name State ---------------------------------------------------- 12 ...
1
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0answers
34 views

When i use virt-install --import, virsh vol-list --pool default return null

I upload my guaji.img file to server, and use following code: sudo virt-install -n guaji -r 512 --os-type=windows --os-variant=winxp --disk #{to_rmt},device=disk,bus=virtio --noautoconsole --import ...
2
votes
1answer
46 views

libvirt - Restart VMs after return from power failure?

Is there any way to make KVM automatically restart any VMs that have been shut down due to power failure? Here is my scenario: I run a small VM tank, mostly with development VMs on it. I now have a VM ...
0
votes
1answer
63 views

Snort in KVM machines

I have installed two physical machines with KVM virtualization using Red hat as OS ( h1 and h2). In h1 I have installed the virtual machines w1 and db1 and in h2 the virtual machines w2 , db1 and ids. ...
4
votes
3answers
757 views

Optimize SSD storage on Centos 6.6 - KVM

I have a Dell R610 with hardware: H700 raid card 4xMicron MX100 512GB -> configured raid 10 I have installed Centos 6.6 on this server and configured: KVM virtualization Volume Group for raid 10 ...
1
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2answers
353 views

Assigning video card to KVM guest VM with PCI-Pass Through

This is on Ubuntu 12.04LTS using KVM. The system has a graphics card which is visible to the hypervisor's kernel shown as follows: # virsh nodedev-dumpxml pci_0000_21_00_0 <device> ...
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1answer
140 views

can't ssh into KVM VM despite using bridged network

I'm trying to access a KVM virtual machine running inside my company's network. I am VPN'ed into the network from my laptop and can ssh into other VMs, and I set up my VM to use a bridged network for ...