Questions tagged [libvirt]
libvirt is an API and toolkit for developing applications which manage virtual machine hypervisors, the virtual machines running under them, and virtual machine storage.
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how to design network for virtual machines with just one nic
for the past week or so i've been recovering from the shock that i have literally no idea how my isp's network works, by getting a new box and trying to do a sensible design from scratch.
our design ...
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2
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Any suggestions on setting a vswitch to allow a kvm guest to pxe install from an external boot server?
Any suggestions on setting a vSwitch to allow a kvm guest to pxe install from an external boot server?
I'm trying to configure a vSwitch, in Fedora 20, so that I would be able to do a net-install, of ...
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Accessing VirtualBox with libvirt from a guest
I have installed libvirt on OSX, and from outside a virtualbox I can access it using virsh no problem. However, I want to access it from inside a guest, and this is giving me the hopelessly useless ...
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Bridging Adapter in Ubuntu 12.04 LTS for KVM
Fresh install of Ubuntu 12.04 LTS with libvert/KVM installed. I have 2 virtual machines that I need need to be on the same LAN as the host. The host has two physical interfaces eth0 and eth1. eth1 is ...
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Libvirt providing bootp options without being configured to do so
I have a virtual network configured in libvirt and configured to provide DHCP (via dnsmasq) but not configured to provide bootp information (see below), but when I boot an iPXE ISO and look at the ...
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Qcow2 backing image and overlay idea
I have 2 KVM servers running Windows Guests. I want to create a Qcow2 image with Windows 7 on it, install the base software needed, and then make that a backing image, read-only, with one qcow2 ...
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kvm/qemu via libvirt on CentOS - pass string or key/value or file to guest
I have a sizeable deployment of qemu/KVM VMs already, managed through libvirt. They're all CentOS 5 or 6 hosts and guests (the kernel lacks the 9p filesystem flags, so the "mount" shared filesystem ...
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nwfilter: Generated firewall rules don't make any sense
I'm trying to configure nwfilter for KVM, but so far I haven't managed
to figure out a working configuration.
Network setup: The dom0 (Debian 7.1, kernel 3.2.46-1, libvirt 0.9.12) is
connected via ...
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729
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Cannot start XML defined Linux Container, faulty cgroup mount
Using ubuntu 13.04 latest; i've installed lxc and various other tools
Here's my XML definition:
<domain type='lxc'>
<name>vm1</name>
<memory>500000</memory>
<...
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809
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Network traffic is not being forwarded from a VM to the network using a bridged interface with Xen + libvirt
I'm having trouble getting network access from a VM that I'm running using Xen and libvirt. I've been trying different things and reading similar posts online for a couple of days but I'm really stuck ...
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Increasing the maximum amount of open files for libvirt [duplicate]
For an experiment I'm trying to start as many VM's as possible through libvirt, however with a little over 1000 VM's running I get an error saying: "Failed to create pipe: Too many open files". Any ...
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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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Domus Memory Used Issue With Xen On CentOS
Anyone know why I'm receiving this error? I compiled latest libvirt from source, I also tried with various rpm.
I would like to get memory used by domus and it looks like it's not working with Xen 3 ...
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libvirt : Host - Guest can't get the correct route to make both pingable
I'am runing A Ubuntu server as a Host, and I've a CentOS guest hosting an oracle database.
Everything was working just fine, until someone init 6 the server (What a great idea!). So I've to ...
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Accessing guests on virtual network when connected to host via PPTP
I'm setting up a development machine which runs Ubuntu 12.04 and KVM for virtualization. I have a guest running Ubuntu 12.04 which can be accessed from the host via its IP address which is assigned by ...
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libvirt timing out. parted blocked messages in kern.log
I'm using Ubuntu 10.04.4 LTS to host KVM virtual machines. I'm using eucalyptus to manage them and having a lot of issues with libvirt not being able to interface with the KVM components and timing ...
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How to permanently attach USB devices to a KVM vserver?
I run a Server using KVM and virt-manager (over SSH). Currently I have the following devices which I want/need in a KVm virtual machine:
+----USB-HUB
+- USB Smartcard Reader #1
+- USB Smartcard ...
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504
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Downloads stuck from a VM run by libvirt (kvm) on Ubuntu 10.04 LTS
I first wrote my problem on stackoverflow thinking it was a Maven proxy software problem.
But I realised it was more a problem with my virtualization stack (libvirt 0.7.5-5ubuntu27.19 / kvm 1:84+dfsg-...
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Migration of Xen domains using libvirt API and perl failing
I am trying to get work offline migration using libvirt API in perl. I have 2 servers (on both is):
- debian squeeze
- xen-hypervisor-4.0-i386
- libvirt (1st server - 0.8.7 and 2nd server - 0.8.3)
In ...
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How to fix a frozen qemu VM?
I have a qemu hypervisor on RHEL 6.4 that hosts VMs that will quite often lose their connection to the network. When the VM has lost its connection I can view and interact with the it using virt-...
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Ovirt doesn't create live snapshot
I installed oVirt. If I suspent VM and create snapshot it's ok, but if I try to do live snapshot on the stage "Finalizing" ovirt have fail.
Ovirt, VDSM and NFS storages are on the same local server.
...
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virsh attach-device for serial device
I would like to add a serial device (console) to a guest via the virsh attach-device command.
I have a console.xml file containing:
<serial type="pty">
<target port="0"/>
</serial>...
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KVM - Passing USB to guest with virsh/XML fails but works from virt-manager
Running kvm on debian 8.8 jessie. I cannot redirect usb from a host to a guest (tried debian jessie and windows 2012 as guests, same problem)
libvirt 1.2.9-9+deb8u4
If I redirect the USB drive ...
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368
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KVM, libvirt, and LVs inside LVs
I have a Debian server running KVM+libvirt. The VMs disks are LVs on the host. The trouble is that if I create LVs inside the guests, they are recursively detected on the host and that creates all ...
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3
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Virsh command hangs when script runs in the background
I have a bash script which runs as a cronjob. This script runs several commands and one of them is the following virsh command:
/usr/bin/virsh list --all
When I run this script in the terminal (as ...
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2
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289
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Bridged Network with libvirt on centos
I'm trying to configure Bridged Network by creating a network script at /etc/sysconfig/network-scripts/ifcfg-br0:
DEVICE="br0"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Bridge"
BOOTPROTO="static"
IPADDR="...
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1
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Is "MaxMemory" safe to over commit with kvm/libvirt?
Using Libvirt / KVM on Ubuntu 16.04
Compiled against library: libvirt 1.3.1
Using library: libvirt 1.3.1
Using API: QEMU 1.3.1
Running hypervisor: QEMU 2.5.0
# dpkg -s qemu-kvm | grep Version
...
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361
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live migration of a virtual machine to a different machine
I am trying to do live-migration using KVM (libvirt).
VM is called host1 and dest. IP address is 10.81.1.9. However, running the following command gives me an error that I am not sure what this ...
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KVM XML config file
I have a KVM server that I expanded the LV of then rebooted. However now when booting I get the error:
error: Failed to create domain from /home/kvm/kvmx/kvmx.xml
error: (domain_definition):1: ...
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3
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Guests can't access KVM host server by name although nslookup and dig returns correct record
So I have a KVM host that also runs an apache server with some yum repos.
The VM guests are connected to the default virtual network, which is configured to offer DHCP and forwarding with NAT on ...
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2
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620
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Strange libvirt/KVM issue, destroying instances?
I have a libvirt/KVM server running on Ubuntu 9.04 with a variety of instances I use for testing. I was destroying instances via virsh and occassionally, destroying one instance would take out another....
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Which piece of software touches network configuration files of a VM in a vagrant-libvirt setup with kvm/qemu?
Which element in a vagrant-libvirt-qemu/kvm-chain is responsible to actually configure the VM? Like editing the network configuration files. Wouldn't that totally depend on the details of the OS of ...
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XML for Qemu `-nic user,model=virtio-net-pci` Network
How do I specify a network interface in libvirt XML that is equivalent to the qemu-system-* argument -nic user,model=virtio-net-pci. I have a variety of qemu machines (without KVM) that happily boot ...
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virsh reporting unknown feature amd-sev-es
I updated my centos and I can no longer start any VM. It says:
error: failed to get emulator capabilities
error: internal error: unknown feature amd-sev-es
But I'm using a Intel CPU (E5-2678v3) so it ...
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1
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Libvirt/KVM support for partiitoned memory
Does KVM/Libvirt support partitioned memory? Is it possible to make sure that two VMs do not have memory-mapping that overlaps?
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495
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Getting error “libosinfo: Unexpected file type (0)” when trying to create or open VM in virt-manager
I get the following error when clicking “Open” or “Create a new virtual machine” in virt-manager:
Error launching details: libosinfo: Unexpected file type (0)
Traceback (most recent call last):
...
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1
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53
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Tracking down usage of libvirt
I'm familiarizing myself with a server that a previous (no longer available) system admin had set up. He had set up CentOS 7 with a variety of packages. One of those packages seems to be libvirtd, ...
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800
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Ubuntu KVM - Bridge - Isolate Host from NIC
I have a Ubuntu Server with 4 physical NICs.
2 of them, i want to "hide" from the Host, so the host itself may not access traffic on those 2 nics, just the VM where i pass them into (...
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3
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libvirt cannot create default network
I can't start the default network for libvirt. I get the error in journalctl:
Jun 06 15:22:43 jenia libvirtd[889326]: Unable to create bridge virbr0: Package not installed
I did installed the ...
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1
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Correct virtio setup on Ubuntu 14.04 64-bit host
At the present moment, my guest is running inside qemu and host is kvm intel, running Ubuntu 14.04, kernel is 4.3.0 stable. From within the guest, when I run "hdparm -i /dev/sdb" on the guest, I get:...
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Interface for accessing to guest OS via libvirt
Is there any possible (not necessary native) ways to get access (e.g., terminal usage is the main purpose for me) to guest OS with *nix using libvirt/LXC(not as libvirt module) capabilities? And I don'...
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1
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588
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php-libvirt installation on centos fails
I am trying to install php-libvirt on centos 6.4 64x and there is an error in ./configure step:
checking for LIBVIRT... configure: error: Package requirements (libvirt >= 0.6.2) were not met:
...
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1
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677
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Using virsh to control KVM and openvz
On different servers I'm using virsh to manage openvz containers or KVM guests.
No I have a server with both, KVM and openvz installed and would like to controll both with virsh.
I can't figure out ...
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1
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1k
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Set host firewall so VMs obtain dynamic IP from dnsmasq
Virtual machines (KVM/libvirt) fail to obtain a dynamic IP address from the libvirt-launched dnsmasq running on a CentOS host when the firewall is running. When I turn off the firewall (CSF), the ...
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1
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540
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Ansible Findall capture groups and list
I think I'm confused with Python and Ansible findall. Can I use capture groups in Ansible? For example, How can I capture group 1 and group 2 then reverse the position in the resulting list?
For ...
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405
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Linux Livirt/KVM: Place all VMs in cpuset by default without reconfiguration
I'm trying to set up a system whereby I have some process on a set of hosts that are in one (shielded) cpuset, while everything else (i.e. all the VMs) are in another. The goal here is to have a ...
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473
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QEMU-KVM, drbd and corosync - VM's doesn't work after reboot
On Debian 9.6 I've got QEMU-KVM Virtualisation. After electricity problems this machine just shut down. After switching it on again I can't start any VM because of this error:
error: internal error: ...
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1
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103
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QEMU - after dist-upgrade of Debian host, win10 guest state lost
I'm running a headless Debian host with a win10 guest that I seldomly login to via vnc. Last week I upgraded Debian from Buster to Bullseye, and that also upgraded QEMU from v3.1 to v5.2 (and libvirt ...
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cloud-init seems to be ignoring write-files script
H!
I am trying to configure VMs with cloud-init, using the terraform Libvirt provider.
For some reason I don't understand, setting hostname works, but writing and running a script for additional ...
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1
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5k
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QEMU / KVM - Dedicated 802.1q VLAN for each VM - Communication only via router
I have a Linux firewall router (dedicated machine) with multiple ethN interfaces (my "big firewall"). All forwarded traffic is filtered by a set of iptables rules (default policy DROP).
...