Bug 1130189

Summary:	Annoying message about permissions of /dev/kvm
Product:	[Community] Virtualization Tools	Reporter:	Vincent Bernat <bernat>
Component:	libguestfs	Assignee:	Richard W.M. Jones <rjones>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	acathrow, mbooth, ptoscano
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Last Closed:	2014-08-14 16:37:37 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Vincent Bernat 2014-08-14 14:01:27 UTC

Description of problem:

When running guestfish, I always get this message:

libguestfs: warning: current user is not a member of the KVM group (group ID 118). This user cannot access /dev/kvm, so libguestfs may run very slowly. It is recommended that you 'chmod 0666 /dev/kvm' or add the current user to the KVM group (you might need to log out and log in again).

On a modern desktop, permissions are setup by logind:

# file: dev/kvm
# owner: root
# group: kvm
user::rw-
user:bernat:rw-
group::rw-
mask::rw-
other::---

I think libguestfs should just try to open /dev/kvm (RW) and close it. If this succeeds, this means that the permissions are correct.

Version-Release number of selected component (if applicable):

1.26.7

Comment 1 Richard W.M. Jones 2014-08-14 14:18:44 UTC

Please try the patch here:

https://www.redhat.com/archives/libguestfs/2014-August/msg00119.html

Comment 2 Richard W.M. Jones 2014-08-14 16:37:37 UTC

The patch is upstream, please try it out.

Comment 3 Vincent Bernat 2014-08-14 17:21:49 UTC

Thanks, it works for me.

Comment 4 Richard W.M. Jones 2014-08-24 20:33:09 UTC

Planned to be fixed in 1.26.8.