Questions tagged [virsh]

Linux virtual machines manager.

Name

virsh - management user interface

Synopsis

virsh [ OPTION ]... [ COMMAND_STRING ]

virsh [ OPTION ]... COMMAND [ ARG ]...

Description

The virsh program is the main interface for managing virsh guest domains. The program can be used to create, pause, and shutdown domains. It can also be used to list current domains. Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). It is free software available under the GNU Lesser General Public License. Virtualization of the Linux Operating System means the ability to run multiple instances of Operating Systems concurrently on a single hardware system where the basic resources are driven by a Linux instance. The library aims at providing a long term stable C API . It currently supports Xen, QEmu, KVM , LXC , OpenVZ, VirtualBox and VMware ESX .

The basic structure of most virsh usage is:

virsh [OPTION]... <command> <domain> [ARG]...

Where command is one of the commands listed below; domain is the numeric domain id, or the domain name, or the domain UUID ; and ARGS are command specific options. There are a few exceptions to this rule in the cases where the command in question acts on all domains, the entire machine, or directly on the xen hypervisor. Those exceptions will be clear for each of those commands. Note: it is permissible to give numeric names to domains, however, doing so will result in a domain that can only be identified by domain id. In other words, if a numeric value is supplied it will be interpreted as a domain id, not as a name. The virsh program can be used either to run one COMMAND by giving the command and its arguments on the shell command line, or a COMMAND_STRING which is a single shell argument consisting of multiple COMMAND actions and their arguments joined with whitespace, and separated by semicolons between commands. Within COMMAND_STRING , virsh understands the same single, double, and backslash escapes as the shell, although you must add another layer of shell escaping in creating the single shell argument. If no command is given in the command line, virsh will then start a minimal interpreter waiting for your commands, and the quit command will then exit the program.

The virsh program understands the following OPTIONS .

-h, --help
Ignore all other arguments, and behave as if the help command were given instead.
-v, --version[=short]
Ignore all other arguments, and prints the version of the libvirt library virsh is coming from
-V, --version=long
Ignore all other arguments, and prints the version of the libvirt library virsh is coming from and which options and driver are compiled in.
-c, --connect URI
Connect to the specified URI , as if by the connect command, instead of the default connection.
-d, --debug LEVEL
Enable debug messages at integer LEVEL and above. LEVEL can range from 0 to 4 (default). See the documentation of VIRSH_DEBUG environment variable below for the description of each LEVEL .
-l, --log FILE
Output logging details to FILE .
-q, --quiet
Avoid extra informational messages.
-r, --readonly
Make the initial connection read-only, as if by the --readonly option of the connect command.
-t, --timing
Output elapsed time information for each command.
-e, --escape string
Set alternative escape sequence for console command. By default, telnet's ^] is used. Allowed characters when using hat notation are: alphabetic character, @, [, ], \, ^, _.
99 questions
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votes
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Why does nested virtualization seems disabled once an instance is stop and started after sometime?

I've setup nested virtualization on a virtual machine and could successfully run Windows guest on it. I used the google example which uses Debian from here The problem is once I shut down the instance and come later to try it does seem like nested…
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Getting error: operation failed: Failed to connect to remote libvirt error when I try doing kvm migration using virsh on debian

I am getting the error message error: operation failed: Failed to connect to remote libvirt URI qemu+ssh://mytargethostname.mydomain.com/system: Cannot recv data: Host key verification failed.: Connection reset by peer when I try to run the kvm…
Japheth Odonya
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KVM CPU share / priority / overselling

i have question about KVM i could not find any satisfying answer in the net about. Lets say i want to create 3 virtual machines on a host with 2 CPUs. I am assigning 1 cpu to 1 virtual machines. The other 2 virtual machines should be sharing 1 cpu.…
hukachaka
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Cannot get all memory stats for libvirt domain

I'm experiencing some problems with virtual machine (guest windows 7, x86_64), running under qemu-kvm and managed by libvirt (created and ran mostly from virt-manager). The problem is that I cannot get full memory statistics either from…
Binpord
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virsh support for docker

Is there any libvirt support for docker? How to access docker containers using virsh tool or libvirt? Docker uses linux lxc, there is a libvirt support for lxc, But I am unable to access containers created by docker using virsh -c lxc:///
praveenraj
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Intel Turbo boost for KVM Guest

Please excuse me if this is a stupid question, however, I'm curious why I'm not seeing any clock speed differences when using fedora as a guest VM via KVM/QEMU. Perhaps this is a rather dumb way of concluding such things, but when I do cat…
comjf
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virt-viewer XDG_RUNTIME_DIR

Good day, I am attempting to spin up a VM using KVM by using an image I have been provided with. I am able to successfully create the VM but the proble is that I am unable to access its console. I connected remotely to my server (ubuntu 14.04) using…
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How to build libvirt box from scratch

I'm trying to build vagrant libvirt box from scratch. I insttalled ubuntu 14.04 and used this tutorial to prepare machine for vagrant using and then I used command virsh domblklist test to find my image file, so i find it here…
GALIAF95
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libvirt error when trying to 'hot' attach-disk on guest with "Channel qemu-ga"

I have KVM virtual machine running CentOS 7 as guest OS. I'm trying to attach an additional disk to it on the run (without shutting it down) using this command: $ sudo virsh attach-disk centos --source /var/lib/libvirt/images/newdisk.img --target…
Fatherice
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Shell script to find the IP address of an Virtual machine created by using KVM/virsh command

I am looking for the shell script to find the IP address of a virtual machine created by using KVM/VIRSH. I used the following steps to get it so, but couldn´t able to find it. Ping the IP addresses in range 2.Use Virsh list command to list all…
Harry
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Golang libvirt guest-agent not available

I've tried to communicate with the guest agent on a qemu instance through the libvirt golang API. However, it always reject my connections with 2022-12-02T00:10:43.799+0100 DPANIC test/main.go:335 Failed to connect to guest {"error":…
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virsh domifaddr does not show KVM IPs

I created a virtual machine on my centos server machine by using the virt-manager. While the installation, I have set a static IP address on the KVM. When I tried to get the IP address of KVM from my centos server terminal by using virsh domifaddr…
Ryanh
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Checking if a vm status is running using virsh and grep - not working when vm name has a space

Hi I am using this script to check if a vm is running or not before doing an action #!/bin/bash vm="PopOS VNC" vmstate=$(virsh list --all | grep " $vm " | awk '{ print $3}') if [ "$vmstate" == "x" ] || [ "$vmstate" != "running" ] then echo "VM…
gridrunner
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virsh destroy &> /dev/null still shows blank output

So I have an annoying problem. I have a script that changes some configuration on a given text file. To change that specific file, I must first destroy the Virtual Machine guest on my KVM. The problem is that every time it stops there is a blank…
nickcrv06
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Can I attach multiple USB devices from one xml file to VM (with virsh)?

I have a two USB sticks (radios) I need to attach to a VM. I can do so by getting the vendor/product ID and creating an xml file (usb_device_1.xml) with:
Aephir
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