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Re: qemu-kvm problem - libvirtd won't start

On 16/11/14 06:39 PM, Joel Roth wrote:
On Sun, Nov 16, 2014 at 05:43:07PM -0500, Gary Dale wrote:
I've been running a couple of virtual machines on a Wheezy/AMD64 server for
a few years now. After the last reboot, I couldn't connect to them anymore.
I can't get libvirtd to start on the server:

[....] Starting libvirt management daemon: libvirtd/usr/sbin/libvirtd:
error: unable to determine if daemon is running: No such file or directory

The message looks a bit strange with the libvirtd at the top of the path.
Checking the libvirt/libvirtd.log I see:

2014-11-16 20:19:11.010+0000: 5658: error : qemuMonitorIO:660 : internal
error: End of file from monitor
2014-11-16 20:19:11.014+0000: 5658: error :
virSecurityDACRestoreSecurityFileLabel:310 : cannot resolve symlink
/dev/bus/usb/002/002: No such file or directory
Well, that is a big hint. Some entry in the /dev
directory is not there.

For example, in my system,

  $ find  /dev/bus/usb/

Those are dynamically generated by a subsystem called udev.
However, sayeth the log, symlinks that point to these are dead.

Not sure where to go with that....
Did you try starting the VMs directly using the qemu command?

The symlink isn't there but that doesn't tell me anything.

Don't have qemu installed. virsh reports:

error: failed to connect to the hypervisor
error: no valid connection
error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory

Tracking down those errors just tells me what I already know - that libvirtd isn't running.

2014-11-16 20:19:14.145+0000: 5658: error : virNetSocketReadWire:1453 : End
of file while reading data: Input/output error

I can't see anything much in syslog - nothing about libvirt(d) and only this
about kvm:

Nov 16 17:07:55 TheLibrarian kernel: [    4.077661] kvm: Nested
Virtualization enabled
Nov 16 17:07:55 TheLibrarian kernel: [    4.077665] kvm: Nested Paging

It's a fairly vanilla Wheezy server setup, running NFS and CUPS but also
Samba4 from the backports, and of course qemu-kvm.

Any ideas anyone?

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