Kvm & Permission Denied
Everyone,
I am trying to install KVM on a desktop unit as a lab project with the hope of being able to use kvm on one of our office servers after I
learn how. So far I am very low on the learning curve.
I have used the guide to make the installation :
https://www.linuxtechi.com/install-kvm-hypervisor-on-CentOS-7-and-rhel-
7/
The installation seemed to go well, but when I tried to add Fedora 27
with virt-manager I have continued to get file permission errors. I
have tried turning selinux off, and making sure the directory permissions are 777 and the file permissions are 666, but have not been able to succeed. A google search demonstrates others have had this problem, and I have tried many of the fixes that have been recorded, but no success.
I am running : CentOS Linux release 7.5.1804 (Core) with 3.10.0-
862.6.3.el7.x86_64 kernel
CPU : AMD FX(tm)-6300 Six-Core Processor
I am using the root account through a konsole interface to activate virt-manager.
The Error Message from virt-manager is :
Unable to complete install: ‘internal error: process exited while connecting to monitor: 2018-07-15T13:55:37.836269Z qemu-kvm: -drive file=/home/greg/Downloads/Fedora/f27/Fedora-Workstation-Live-x86_64-27-
1.6.iso,format=raw,if=none,id=drive-virtio-disk0: Could not open
‘/home/greg/Downloads/Fedora/f27/Fedora-Workstation-Live-x86_64-27-
1.6.iso’: Permission denied’
Traceback (most recent call last):
File “/usr/share/virt-manager/virtManager/asyncjob.py”, line 89, in cb_wrapper
callback(asyncjob, *args, **kwargs)
File “/usr/share/virt-manager/virtManager/create.py”, line 2545, in
_do_async_install
guest.start_install(meter=meter)
File “/usr/share/virt-manager/virtinst/guest.py”, line 498, in start_install
doboot, transient)
File “/usr/share/virt-manager/virtinst/guest.py”, line 434, in
_create_guest
domain = self.conn.createXML(install_xml or final_xml, 0)
File “/usr/lib64/python2.7/site-packages/libvirt.py”, line 3658, in createXML
if ret is None:raise libvirtError(‘virDomainCreateXML() failed’, conn=self)
libvirtError: internal error: process exited while connecting to monitor: 2018-07-15T13:55:37.836269Z qemu-kvm: -drive file=/home/greg/Downloads/Fedora/f27/Fedora-Workstation-Live-x86_64-27-
1.6.iso,format=raw,if=none,id=drive-virtio-disk0: Could not open
‘/home/greg/Downloads/Fedora/f27/Fedora-Workstation-Live-x86_64-27-
1.6.iso’: Permission denied
The /var/log/message entries associated with the above error message is the following :
Jul 15 08:55:37 HmGp libvirtd: 2018-07-15 13:55:37.922+0000: 1643:
error : qemuMonitorOpenUnix:385 : failed to connect to monitor socket:
No such process
Jul 15 08:55:37 HmGp libvirtd: 2018-07-15 13:55:37.927+0000: 1643:
error : qemuProcessReportLogError:1912 : internal error: process exited while connecting to monitor: 2018-07-15T13:55:37.836269Z qemu-kvm:
-drive file=/home/greg/Downloads/Fedora/f27/Fedora-Workstation-Live-
x86_64-27-1.6.iso,format=raw,if=none,id=drive-virtio-disk0: Could not open ‘/home/greg/Downloads/Fedora/f27/Fedora-Workstation-Live-x86_64-
27-1.6.iso’: Permission denied
Thanks ahead of time for your help.
Greg Ennis
3 thoughts on - Kvm & Permission Denied
Don’t turn SELinux off.
Don’t completely disable your security systems.
/home/greg will be protected from other users by default. You would need to change permissions on that directory from 0700 to 0701 to use an ISO there. The “right” fix, though, would be to copy the ISO file to
/var/lib/libvirt/images/
Don’t turn SELinux off.
Don’t completely disable your security systems.
/home/greg will be protected from other users by default. You would
need to change permissions on that directory from 0700 to 0701 to use an
ISO there. The “right” fix, though, would be to copy the ISO file to
/var/lib/libvirt/images/
————————————————
Gordan,
I appreciate your admonition about selinux and the protectioin levels of the directories. As soon as I discovered that these aspects were not the issues, I changed them back to the original values. The location of the iso image in /var/lib/libvirt/images/ directory fixed the problem and allowed me to proceed with my laboratory development. Thank you very much. After knowing the importance of the location of the iso image files, I re-read the tutorials and I could not identify this piece of information, hopefully this thread will help others that are newbies with kvm.
Thanks again!!!!
Greg
—
Gregory P. Ennis, M.D., M.R.O. Medical Director EcCare Health Centers
972-659-1234
http://www.EcCare.com
When you browse for an image using virt-manager, /var/lib/libvirt/images is the only location in which you can select image files without adding a new “volume.” The authors of the tutorials you read may have assumed that users would copy images to that location rather than adding a new volume.
You can help make those tutorials better by contacting their authors and suggesting that they mention that users should copy image files there.
I’m sure you’re not the only person whose time could be saved by a helpful tip.