How to install Virt-manager unable to connect to Libvirt using VMware virtual machine

RHEL7.0 start the LIBVIRTD service process after the installation is complete Virt-manager

[[email protected] desktop]# Systemctl enable Libvirtd[[email protected] desktop]# systemctl start LIBVIRTD

When you start the virtual machine management software by using the Virt-manager command, prompt Unable to connect to Libvirt

Unable to connect to libvirt.no connection driver available for Qemu:///systemlibvirt URI is:qemu:///systemtraceback (MOS T 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) F Ile "/usr/lib64/python2.7/site-packages/libvirt.py", line, Openauth if RET is none:raise libvirterror (' VirConnec Topenauth () failed ') Libvirterror:no connection driver available for Qemu:///system

View the status of LIBVIRTD

[[email protected] desktop]# systemctl status libvirtdlibvirtd.service -  virtualization daemon   loaded: loaded  (/usr/lib/systemd/system/libvirtd.service ;  enabled)    Active: active  (running)  since Mon 2015-08-31  21:27:48 CST; 4MIN 47S AGO     DOCS: MAN:LIBVIRTD (8)             http://libvirt.org main pid: 9837   (LIBVIRTD)    CGroup: /system.slice/libvirtd.service            └─9837 /usr/sbin/libvirtdAug 31 21:27:48  demo.example.com libvirtd[9837]: libvirt version: 1.2.8, package: 16.el7_1.3   (centos buildsystem 
There may be a problem with the driver installation, update the Device-mapper package
[email protected] desktop]# Yum update device-mapper
Restart LIBVIRTD Service
[[email protected] desktop]# systemctl restart libvirtd[[email protected]  Desktop]# systemctl status libvirtdlibvirtd.service - virtualization daemon    Loaded: loaded  (/usr/lib/systemd/system/libvirtd.service; enabled)     Active: active  (running)  since Mon 2015-08-31 21:34:23 CST;  7S AGO     DOCS: MAN:LIBVIRTD (8)             http://libvirt.org Main PID: 10082  (LIBVIRTD)     CGroup: /system.slice/libvirtd.service            ├─10082 /usr/sbin/libvirtd           ├─10185  /sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --dhcp-script=/usr/libexec/ libvirt_leaseshelper           └─10186 /sbin/dnsmasq --conf-file=/var/lib/ Libvirt/dnsmasq/default.conf --dhcp-script=/usr/libexec/libvirt_leaseshelperaug 31 21:34:23  demo.example.com systemd[1]: started virtualization daemon. aug 31 21:34:26 demo.example.com dnsmasq[10185]: started, version 2.66  cachesize 150aug 31 21:34:26 demo.example.com dnsmasq[10185]: compile  time options: IPv6 GNU-getopt DBus no-i18n IDN DHCP DHCPv6  No-lua tftp no ... et authaug 31 21:34:26 demo.example.com dnsmasq-dhcp[10185]: dhcp, ip  Range 192.168.122.2 -- 192.168.122.254, lease time 1haug 31 21:34:26  demo.example.com dnsmasq[10185]: reading /etc/resolv.confAug 31 21:34:26  Demo.example.com dnsmasq[10185]: using nameserver 202.103.44.150#53aug 31 21:34:26 demo.example.com  dnsmasq[10185]: using nameserver 202.103.24.68#53Aug 31 21:34:26  demo.example.com dnsmasq[10185]: read /etc/hosts - 4 addressesaug 31  21:34:26 demo.example.com dnsmasq[10185]: read /var/lib/libvirt/dnsmasq/default.addnhosts  - 0 addressesAug 31 21:34:26 demo.example.com dnsmasq-dhcp[10185]:  Read /var/lib/libvirt/dnsmasq/default.hostsfilehint: some lines were ellipsized,  use -l to show in full.
At this time LIBVIRTD service display as normal, no error occurred, run Virt-manager again, can connect normally
How to install Virt-manager unable to connect to Libvirt using VMware virtual machine