Ytdyklly

I installed kvm package in the centos7 i am getting this problem how to solve this.

full error is here

Unable to connect to libvirt.



no connection driver available for qemu:///system



Libvirt URI is: qemu:///system



Traceback (most recent call last):

  File "/usr/share/virt-manager/virtManager/connection.py", line 969, in _open_thread

    self._backend.open(self._do_creds_password)

  File "/usr/share/virt-manager/virtinst/connection.py", line 157, in open

    open_flags)

  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in openAuth

    if ret is None:raise libvirtError('virConnectOpenAuth() failed')

libvirtError: no connection driver available for qemu:///system

more info

[AsNaDa@localhost ~]$ systemctl is-enabled libvirtd.service

enabled

[AsNaDa@localhost ~]$ systemctl is-active libvirtd.service

active



[AsNaDa@localhost ~]$ rpm -qf /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so

libvirt-daemon-driver-qemu-1.2.8-16.el7_1.2.x86_64

[AsNaDa@localhost ~]$



Welcome to virsh, the virtualization interactive terminal.



Type:  'help' for help with commands

       'quit' to quit



virsh # 

I had the same problem in CentOS 7.
In my case upgrading device-mapper-libs solved the issue:

yum upgrade device-mapper-libs

In my case, some hints were given by checking status of libvirtd:

service libvirtd status

There were errors like below, so if you have similar problem, upgrading device-mapper-libs should help.

Oct 18 17:55:34 localhost.localdomain libvirtd[6130]: failed to load

module /usr/lib64/libvirt/connection-driver/libvirt_driver_storage.so

/usr/lib64/libvirt/connection-driver/libvirt_driver_storage.so: symbol

dm_task_...k time reference



Oct 18 17:55:34 localhost.localdomain libvirtd[6130]: failed to load 

module /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so 

/usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so: undefined

symbol: virStorageFileCreate<br>

To have possibility to run virt-manager correctly on the same machine as you'd like to control it (locally), you'll need to install the following packages:

qemu-kvm
qemu-img
virt-manager
libvirt
libvirt-python
python-virtinst
libvirt-client
virt-install
virt-viewer

Re-check if they are all correctly installed on your server, or simply run the following statement:

# yum -y install qemu-kvm qemu-img virt-manager libvirt libvirt-python python-virtinst libvirt-client virt-install virt-viewer

If some of described packages are not installed on your system, they'll be installed (and packages that are existing will be skipped).

Also, the following systemd services should be enabled and running on the machine:
libvirtd.service
libvirtd.socket
libvirt-guests.service

Good luck!