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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virsh get disk location of all VMs in a Array

for i in $(virsh list --all | awk '{print $2}'|grep -v Name); do virsh domblklist $i --details | awk '{print $4}'|grep -v Source; done I…
fteinz
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Want to open a vm through php code using virsh command

I want to open a vm through following php code: &1"); echo "
$output
"; ?> I already set the permission of a file with read,write and execute. I am getting the following…
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2 answers

How to enter KVM instance without IP?

I live migrate a openstack vm instance using virsh migrate --live instance-00000008 qemu+tcp://nova@az02hci02:16509/system --copy-storage-all command. This migration is live migrtation without shared storage. Migration is success and instance's…
PZY
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Why virsh domxml-to-native changes PCI slot number

I have the following definition of network define virsh edit vm:
Tal
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How to pass driver information as KVM for adding PCI device to a VM instance

I Use the following command to instantiate a VM on KVM[Ubuntu 14] virt-install --name --ram 4096 --cpu , --vcpus=2 --arch=x86_64 --disk path=/var/lib/libvirt/images/image.qcow2,size=16,device=disk,bus=ide,format=qcow2 --os-type linux --os-variant…
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ssh from guest to kvm host

I have a kvm server where the guest vm's get internet acces due to a bridge. I would like to access the host from a guest vm by ssh but get a "port 22: Connection refused", altough i can ping the host on all ip's. brctl show bridge name bridge…
spdfrx
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Libvirt Ubuntu Installation HVM Issue

So I've been trying to spin up an Ubuntu server install using virt-install, and I can't seem to get it to work. It fails out with the following message: ERROR Couldn't find hvm kernel for Ubuntu tree. I've seen forum posts all over about this…
essex
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Debugging a custom OS with QEMU

I am trying to write a simple OS, I already wrote a bootloader but now I want to debug it, so I switched from using VirtualBox to QEMU because I saw it had better debugging. The problem is that after I added the -s parameter to QEMU command and…
Tal K
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qcow2 growing faster than guest filesystem

I'm having difficulties to understand the disk size of my qcow2 image. I have a CentOS 6 box running: # virsh version Compiled against library: libvirt 0.10.2 Using library: libvirt 0.10.2 Using API: QEMU 0.10.2 Running hypervisor: QEMU 0.12.1 I…
ppavlov
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Python Libvirt API for domtime actions

Does anybody know if python-libvirt has any API to perform 'domtime operations'. I'm writing a python script that runs the command manually using os module. ... os.system("virsh domtime %s --sync" % my_domain) ... I want to use the libvirt API for…
jcfaracco
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How to setup port forwading in KVM natively?

I using Virsh to manage virtual machines using KVM. Have a main host and virtual machine with http service (port 80). How to setup the port forwading to expose http service to internet without using firewalls such as iptables, firewalld or…
e-info128
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When I type "libvirtd --listen" in linux shell, there is error "GNUTLS support not available in this build"

I was doing some experiment on live migration using virsh. When I input anything related to tls, such as "# virsh -c qemu+tls://source/system",or "libvirtd --listen", there would be errors like "GNUTLS support not available in this build". So, here…
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Is there a way to share host (ubuntu) file system with guest (centos 7)?

I am trying to use virsh and domain xml to launch a Centos 7 guest from ubuntu 16.04 LTS host. The "filesystem" node that i am using in domain xml is as below:
Swaru
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golang exec incorrect behavior

I'm using following code segment to get the XML definition of a virtual machine running on XEN Hypervisor. The code is trying to execute the command virsh dumpxml Ubutnu14 which will give the XML of the VM named Ubuntu14 virshCmd :=…
azizulhakim
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Bridge not working in QEMU virsh

I have two production systems that are down. I did not set them up, and am new to QEMU and virsh. While there are two, I am really only concerned with the one server called sbs2011, since that is the most critical, and when that is fixed, then the…
stubsthewizard
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