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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capping VM IO with cgroups

I'm using cgroups to cap disk IO that a VM does by using libvirt's support for cgroups. So, I'm getting the major/minor number of the device from a 'ls -lL' on the drive where the '.img' file for the ...
2
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1answer
425 views

OpenNebula-managed libvirt not allowing access to /dev/kvm

I have a fresh Open Nebula 3.2.1 installation which I'm trying to get working and manage some freshly-installed debian squeeze kvm hosts. My problem is that when Open Nebula deploys VMs the KVM ...
2
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1answer
839 views

virt-install kept on adding --no-reboot - even though I don't want it to

I have a bit of a problem getting my guests to reboot after the OS installation using virt-install. For whatever reason, virt-install insists on inserting "--no-reboot" when you create a VM: ...
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1answer
429 views

Setting up reverse proxy for virtual machines on HostOS

I am currently installing a server that consists of a Virtualization Host (kvm on ubuntu) and 7 VM's, some running MySQL and LDAP, others running different webservers and webapplications. The VMs ...
2
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1answer
589 views

Ubuntu Server mdadm drbd ocfs2 kvm hangs under heavy file reading

I have deployed four ubuntu 10.04 server. They are coupled two by two in a cluster scenario. on both sides we have software raid1 disks, drbd8 and OCFS2 and on top of it some kvm machines run with ...
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1answer
495 views

Installing and running a guest OS on KVM-qemu with only serial console access

I am trying to installing a bsd distro with virt-installer. With a Linux distro I used this: virt-install -n debian -r 1024 --vcpus=1 --accelerate -v --disk ...
2
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1answer
696 views

Windows NT from vmware to kvm

I'm trying to convert a couple of old Windows NT virtual servers from vmware to KVM. I tried almost all guidelines and how to I found around the web but with no luck. I have the vmware virtual disk: ...
2
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1answer
490 views

Give a KVM Guest only access to OpenVPN

I'm in a kind of weird situation where I need to do the following: Connect an OpenVPN tunnel with static RFC1918 IPs (think of 10.3.3.1 for the server end and 10.3.3.2 for the client end) and have it ...
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1answer
236 views

KVM QEMU looses USB devices

I have a KVM Qemu setup. I'm mapping a USB device to a VM running windows vista. I get the device mapped, and all is well for some time. Suddenly the device disappears in Vista. If I do "lsusb" in ...
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1answer
381 views

iptables string match works on VM host but not guest

Have been tested some iptables string match rules on Linux KVM virtual machines with a bridged interface (Fedora 12 & 13 64-bit), for example a rule in the INPUT Chain that is before other port 80 ...
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1answer
35 views

VPN SSTP windows client can not ping or connect to VPN server but it can talk to every other PC on the local LAN that VPN server is on

So I have an SSTP (with native Windows client) working fine in a sense. My windows client's local IP is 192.168.10.11 , so its local network is: 192.168.10.x The Remote VPN server is behind a router ...
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1answer
270 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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1answer
968 views

OpenVPN connects and access to ip works but not url in browser

I have been struggling for 2 days to setup Openvpn access to one of my servers but something doesn't work. First about my setup: My server is Debian 6 installed on vps on kvm environment. I have ...
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1answer
106 views

CentOS 6.5 Server Lockup

Today one of our CentOS 6.5 KVM nodes from OVH crashed after 46 days of uptime and we were unable to find the reason why, we had this issue before with the OVH kernel on another server but this one is ...
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1answer
324 views

Ping (DUP) with Linux bridges and tap devices

http://imgur.com/qPoy2QJ I have two Linux (Ubuntu 12.04) VM (running on KVM) that networked together using two Linux bridges as shown above. The network interfaces are Linux TAP devices. The problem ...
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1answer
165 views

kvm hypervisor kernel panic

My kvm hypervisor had been running with 20+ vps guests for a few months. But a few days ago it went to kernel panic. There were no abnormal operation that I found would cause the problem, except that ...
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1answer
140 views

Bridging is breaking the server: KVM configuration

I'm pretty new to networking and just can't get my head around this. I'm trying to setup KVM-Qemu so I can run some virtual machines. The instructions I'm following are telling me to use eth0 and ...
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1answer
2k views

Assign ipv6 address to KVM guests on bridge mode

System: CentOS 6.5 Network: Bridge on br0 IPv6: ISP Native /64 block. IPv4: ISP address (not internal LAN) Purpose: To assign IPv6 only to guests (manually), I don't want ipv4 address to be ...
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1answer
295 views

kvm guest can not connect to outside of host, vice versa

I have a vmware vm running ubuntu 12.04 server(name=vmhost), with network bridged and full access to the internet. This vmhost is using the kvm hypervisor and is running a vm(centOS 6.4),network ...
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1answer
172 views

virt-viewer slower than virt-manager when viewing

I've got a thin client server in which I have a few VM's for users under KVM which I manage through virt-manager. What I've noticed is if I start a VM guest on a thin client using the command ...
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1answer
317 views

KVM Slow performance on XP Guest

The system is very slow to do anything, even browse a local folder, and CPU sits at 100% frequently. Guest is XP 32 bit. Host is Scientific Linux 6.2, Libvirt 0.10, Guest XP OS shows ACPI ...
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1answer
867 views

OpenStack Instance not using up full space

I have created new instance with Centos 6.4 with 20 GB Disk Space but when i logging to the VPS and Execute df -h the space shown as the following Filesystem Size Used Avail Use% Mounted ...
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1answer
393 views

KVM bridge network initial setup - 2 public IPs

I have actually two problems with my server. The setup is like this: server in a data center connected directly to the internet one network card / two public IPs (one IP the server gets over DHCP, ...
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1answer
207 views

How can I tell what Hyper-V enlightenments a 2008R2 guest is using?

I have a Server 2008R2 guest running inside a KVM host. I've enabled various Hyper-V enlightenments through KVM (-cpu host,hv_relaxed,hv_vapic,hv_spinlocks=0x1000), but I'm not sure how I can confirm ...
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1answer
647 views

Proxmox - Assign more memory to KVM VM

Is it possible to assign more memory to a KVM virtual machine without restarting it? I changed the memory size of a VM using the Proxmox web interface, but can't see that increase in the guest.
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1answer
107 views

Migrating to kvm

Ours is a small setup. Currently we have two windows/hyper-v servers running around 8 ubutu server virtual machines. The virtual machines were built long time back to the extent that ubuntu version is ...
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1answer
180 views

Is it possible to create an equivalent environment of a KVM guest using QEMU for Windows?

I have a KVM guest in a datacenter that is my production server for a service I am developing. I would like to create an equivalent virtual environment on my Windows machine so I can be sure that ...
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1answer
290 views

assign a USB to KVM virtual machine centos 5.8

can any one advice how to assign a USB to a guest based on KVM and host is centos 5.8 64-bit ? when i tried with gui using virt-manager -> add physical device-> usb i got all usb like null despite ...
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1answer
246 views

Apply libvirt nwfilter without editing of XML

Is it possible to apply libvirt's network filter to a KVM guest without manually editing the XML (for use in scripts)? Or is there any easy way of pushing the network filter configuration into ...
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1answer
178 views

kvm -monitor pty : how to find out the associated /dev/pts/#num

I have a server running multiple kvms. These are two to three vms so I consider libvirt somewhat oversized for management. And I'm completely comfortable with that setup. I actually just need the kvm ...
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1answer
383 views

Connect KVM virtual network to internet

I have a CentOS server running KVM and need to connect a virtual network to the internet. The network must be routed or NATted, it must not be bridged (port security). If possible, I would like to ...
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1answer
59 views

IP and network config

I have a question regarding IP and network config. I have Ubuntu OS with KVM - Virt Manager and I installed two VM Guest OS(Ubuntu).I config the Host IP with 172.X.X.1(local IP) and try to access the ...
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1answer
1k views

How to make sysctl network bridge settings persist after a reboot?

I am setting up a notebook for software demo purpose. The machine has 8GB RAM, a Core i7 Intel CPU, a 128GB SSD, and runs Ubuntu 12.04 LTS 64bit. The notebook is used as a KVM host and runs a few KVM ...
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1answer
176 views

Multiple IPs on eth0, bridging to VMs and routing

Current situation: I have a host running 3 virtual machines. One IP for eth0 (xxx.xxx.xxx.239) and one additional for eth0:1 (yyy.yyy.yyy.35). This works fine for me... Host (eth0) (xxx.xxx.xxx.239) ...
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1answer
520 views

iptables and virtual machines of KVM, no ping, no ssh from VMs

Hi everyone :) I have two virtual machines KVM. I did two alias to eth0 - eth0:0 and eth0:1 and put them on an external IPs (eth0:0 - 89.114.122.3, eth0:1 - 89.114.122.4)​​. Now the problem is: ...
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1answer
184 views

View Desktop of all currently logged in Users on Windows Server

Were running Windows Server 2008 R2 Enterprise in a small research project at home. We need multiple users running Software in the background. For Monitoring purposes I'd like to have the ability to ...
1
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1answer
371 views

Opennebula KVM onevnet

I am experimenting with Open Nebula and KVM and so far I have a frontend and a few hosts (all hosts have two NICs for redundancy). I know that KVM makes on the hosts a virtual interface virbr0. ...
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1answer
412 views

CPU usage is very large in top command of Linux

I run SUSE Linux Enterprise Server 11 SP1 in a virtual machine. The hypervisor is KVM. There is 4 virtual CPU cores for the VM. Now there is a very strange thing. In theory the maximum CPU usage ...
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1answer
472 views

Shared storage for VMs without dedicated storage server

On a legacy project I've got 4 physical machines (servers, PM's) where each server has access to the SAN and fixed-space by it's own two devices (via device-mapper multipath). The local disks of the ...
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1answer
145 views

Virtualization queries

I am virtualization newbie. Please advise on these questions. Please note using a commercial VM software like Citrix or VMware is not a choice for me. I have at my disposal couple 2x 4 core servers ...
0
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1answer
10 views

libvirt management is slow under ubuntu

I've just done a fresh install of KVM/Qemu under Ubuntu 14.04.2 on an older (C2D gen) server with dual quad core xeons and 24 gb of ram. I'm finding that I'm waiting for operations in virsh for around ...
0
votes
1answer
89 views

How can I configure multiple tap interfaces for a single KVM virtual machine

I am trying to setup a VM using Linux KVM for a F5 BIG-IP VE deployment (used in a lab) ...
0
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1answer
50 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 ...
0
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1answer
155 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 ...
0
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1answer
34 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 ...
0
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1answer
95 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. ...
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1answer
341 views

KVM Isolated network between host and guest fails after few hours

I have a KVM CentOS host with several CentOS guests. All of the guests are using a bridge for network communication. The guests have been up and operational for several months and work properly. The ...
0
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1answer
35 views

auto assign ip address to httpd.conf

I am building a cluster of servers in which new virtual machines will spin up as resources are needed. Is it possible in the apache config file to use a variable that will detect the servers ip ...
0
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1answer
717 views

Debian Jessie Qemu KVM GPU Passthrough to Windows Virtual Machine guest Virt-Manager error Bus PCI not found

I'm having problems with Virt-Manager not wanting to boot a VM and giving error: Error starting domain: internal error: process exited while connecting to monitor: char device redirected to ...
0
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1answer
571 views

ERROR Host does not support virtualization type 'hvm'

I have a problem in installing vm on KVM using libvirt virsh install sudo virt-install -n ccnx1 -r 512 --vcpus=1 --os-type=linux --accelerate --nographics -v -l ~/ubuntu-12.04.5-alternate-i386.iso ...