We had a similar surprise updating our lab to CentOS 7.3.  Even Openstack 
aside, libvirt itself on 7.3 couldn’t recognize any of our defined VMs - kept 
giving a message of “ No path to ‘ ‘ “ just trying to do a ‘virsh list’.   We 
ended up adding an additional yum repo definition pointing to the older 7.2 
repo and doing a yum history rollback and we’ve stopped pointing to the 7.3 
repo altogether.  We had other problems with Cent 7.3 as well, unrelated to 
virtualization.

Are others out there successfully using CentOS 7.3 right now with libvirt or is 
everyone experiencing this similar pain.

That’s frightening that the virtio-scsi support is broken as well.

Mike Smith
Lead Cloud Systems Architect
Overstock.com<http://overstock.com>



On Dec 20, 2016, at 9:57 AM, Mike Lowe <joml...@iu.edu<mailto:joml...@iu.edu>> 
wrote:

I got a rather nasty surprise upgrading from CentOS 7.2 to 7.3.  As far as I 
can tell the libvirt 2.0.0 that ships with 7.3 doesn’t behave the same way as 
the 1.2.17 that ships with 7.2 when using ceph with cephx auth during volume 
attachment using virtio-scsi.  It looks like it fails to add the cephx secret.  
The telltale signs are "No secret with id 'scsi0-0-0-1-secret0’” in the 
/var/log/libvirt/qemu instance logs.  I’ve filed a bug here 
https://bugzilla.redhat.com/show_bug.cgi?id=1406442 and there is a libvirt 
mailing list  thread about a fix for libvirt 2.5.0 for what looks like this 
same problem 
https://www.redhat.com/archives/libvir-list/2016-October/msg00396.html  I’m out 
of ideas for workarounds having had kind of a disastrous attempt at downgrading 
to libvirt 1.2.17, so if anybody has any suggestions I’m all ears.
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