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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Can't get virsh list in node-ssh

app.js: const fs = require('fs') const path = require('path') const {NodeSSH} = require('node-ssh') const ssh = new NodeSSH() ssh.connect({ host: '192.168.0.2', username: 'ubuntu', password: '123456' }) .then(function() { …
徐奕群
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kvm/qemu debian 10 vm network issue

I'm trying to run a default basic deb10 VM on my deb10 dedicated server but I can't reach the VM on the default network. I can't make it acquire any IP address nor reach it in any way. I tried many things on many threads found online, without…
OraYa
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libvrt: dnsmasq: failed to bind DHCP server socket: Address already in use

I am trying to create a VM using virt-manager. BUt i see Error starting network 'default': internal error: Child process (VIR_BRIDGE_NAME=virbr0 /usr/bin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro…
Santhosh
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KVM + virsh: the storage pool is empty

I am new to KVM and virsh command I want to change my storage-pool to some other folder but before that i dont see any default storage pool $ virsh pool-list --all Name State Autostart --------------------------- the…
Santhosh
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How to change cputune dynamic?

Can I change the cputune when VM is running? I remember that there is a virsh command to change this parameter when VM is running. Thanks.
Ricky Du
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virsh reverting changes to domain tag

My ultimate goal is to add the qemu:commandline tag to my vm's xml file, but to do that I need to change to However, whenever I make this change…
KCGD
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Exit out of a console connection in Python

I am working on some python code to log into a whitebox device that houses a virtual application (VTA). There will be two different VTAs installed and the code will log into the physical device, then log into the VTA using a virsh console (Name of…
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libvirt:: change boot order by command

Is there any libvirt command that can be used to change boot order for a VM? I know edit xml file can complete this, but I need a command to do this becos I have to shell the command in a script. Thanks, Leo
Leo Yang
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CEPH pool img - virsh live attach

I want to attach Ceph rbd block image to running VM. I can attach img1 by editing vm xml so all works here. But i want to make it live attach. Pool and image are visible from host lvl # virsh pool-list Name State Autostart…
milekz
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virsh capabilities does not include qemu or kvm

I am new to Libvirt and Qemu.I have installed Libvirt 7.1.0 and qemu-kvm 4.2.0 on centos 8. I configured and built libvirt based on instructions from https://libvirt.org/compiling.html. But when i tried to create a VM using virsh it shows the…
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Slow guest performance after live snapshot via virsh (QEMU/KVM)

I came across a weird problem for which I cannot find a solution elsewhere. Maybe you can help me. I have a system running Ubuntu 20 LTS which is the host of six guests (four Ubuntu 20 LTS and two Windows Server 2019) and they are running quite fast…
pakl
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Parse virsh output

Is there a way to force virsh to print information in a parseable way? like json? I want to write a one-liner shell command that gets the IP address of a VM but the way virsh prints it out is not very friendly to scripts: # virsh domifaddr myvm …
Jeff Saremi
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KVMs not running after qemu-kvm upgrade in CentOS 8.1, RHEL 8.1

This is the error i encountered when i updated my CentOS 8.1/RHEL 8.1 machines and all the KVMs are showing the error below: error: internal error: process exited while connecting to monitor: 2020-06-09T12:41:10.410896Z qemu-kvm: -machine…
RobratZzI
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When nat is set with iptables on the KVM Host machine, routing to the VM set to start automatically as Host starts is not possible

Issue: Both the Host machine and VM built with CentOS 6.10. The ExternalMachine⇔VM is routed by using the nat function of Host iptables. As a problem, iptables have started("service iptables status") after restarting the Host machine or turning on…
lulu_39
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Running command with os.popen with sudo in python

I have a command /usr/bin/virsh dumpxml that I need to run inside of a python program, the thing is that the command needs to run like sudo -u sudo /usr/bin/virsh dumpxml , I try to call it with the following code: cmd = "sudo -u…
happygopher
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