Red Hat Bugzilla – Bug 1023366
[virsh cmd] Error message is not clear for commands blkiotune and schedinfo
Last modified: 2015-03-05 02:25:23 EST
Description For non-root user, when executing commands "virsh blkiotune <domainVM>" or "virsh schedinfo <domainVM>", error will occurs but error message is not clear. Version: virt-manager-0.10.0-4.el7.noarch libvirt-1.1.1-9.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1. Issue the following command to create a user and set its password: #useradd non-root ; passwd non-root 2. Switch to user "non-root" by command "su - non-root", and create or import a VM named "DomainU1" 3. Execute commands "blkiotune" or "schedinfo" under "non-root" user, and error will occurs. Actual results: 1. [non-root@localhost ~]$ virsh blkiotune DomainU1 error: Unable to get blkio parameters error: Requested operation is not valid: blkio cgroup isn't mounted 2. [non-root@localhost ~]$ virsh schedinfo DomainU1 Scheduler : Unknown error: Requested operation is not valid: cgroup CPU controller is not mounted The above error message is not clear. Expected results: Error message should be clear and improved. Additional info: This issue occurs both on RHEL7 and RHEL6.5
Command "memtune" will have the same problem. These cannot be supported in session mode, so there should be proper error message printed out, working on that.
Fixed upstream with commit v1.2.2-48-g45ad1ad: commit 45ad1adb4a5ae5ce46287c570e87abab6ffe62d6 Author: Martin Kletzander <mkletzan@redhat.com> Date: Thu Feb 27 13:10:32 2014 +0100 qemu: Reject unsupported tuning in session mode
*** Bug 1121583 has been marked as a duplicate of this bug. ***
I can produce this bug on libvirt-1.1.1-9.el7.x86_64 qemu-kvm-rhev-2.1.0-5.el7.x86_64 verify it on libvirt-1.2.8-8.el7.x86_64 qemu-kvm-rhev-2.1.2-12.el7.x86_64 kernel-3.10.0-208.el7.x86_64 verify steps: 1. create a non-root user test #useradd test #passwd test #su - test 2. prepare a guest under non-root user and start it normaly $ virsh list --all Id Name State ---------------------------------------------------- 3 aaa running 3. run blkiotune ,schedinfo and memtunewith guest running, shutoff , paused. report error correct $ virsh blkiotune aaa error: Unable to get number of blkio parameters error: unsupported configuration: Block I/O tuning is not available in session mode $ virsh schedinfo aaa Scheduler : Unknown error: Operation not supported: CPU tuning is not available in session mode $ virsh memtune aaa error: Unable to get number of memory parameters error: Operation not supported: Memory tuning is not available in session mode move to verified
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHSA-2015-0323.html