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========================================
Libvirt does not work after installation
========================================
.. contents::
TL;DR
=====
Most probably you want to start a virtqemud socket:
::
# systemctl start virtqemud.socket
If you are unsure whether to do this, please read the rest of this document.
Symptom
=======
After installing libvirt or a virt tool that uses libvirt, commands do
not work when run as root:
::
# virsh list
error: failed to connect to the hypervisor
error: Operation not supported: Cannot use direct socket mode if no URI is set.
For more information see https://libvirt.org/kbase/failed_connection_after_install.html
Or
::
# virsh list
error: failed to connect to the hypervisor
error: Operation not supported: No URI is provided and cannot identify any listening
daemon socket path to attempt to connect to. For more information see
https://libvirt.org/kbase/failed_connection_after_install.html
Root cause
==========
Distribution guidelines and/or configurations may discourage or prohibit
starting services as part of a package installation. And because libvirt cannot
know where you might want to connect it cannot start it on its own.
Solution
========
After installing libvirt you may need to start a particular libvirt daemon on
the local machine, set a (default) URI to connect to or, alternatively,
rebooting the machine might work.
If you are trying to connect to a remote libvirt daemon you need to specify a `connection URI <../uri.html>`__.
If you are trying to control a local hypervisor, then the solution depends on various factors. You should know:
- what hypervisor driver you want to connect to, whether it is ``virtqemud`` for QEMU, ``virtchd`` for Cloud Hypervisor, etc. and
- how to start a service or socket (in case of systemd) on you system.
Example of the most common solution, trying to use QEMU/KVM on Linux with systemd as an init system, is:
::
# systemctl start virtqemud.socket
also provided on the top of the page.
|
