[libvirt-users] Does virsh actually work?

Gary Hook garyrhook at gmail.com
Wed Sep 3 19:05:08 UTC 2014


I have been beating my head against a wall attempting to get virsh to
migrate a simple VM from one host to another.

I have two systems running Ubuntu 14.04 with libvirt 1.2.2. Yes, they are
bridged. Non-shared storage. Modest guest VM that only requires 100G of
disk space; there is far more available.

In trying to accomplish even the simplest migration (per every page I can
find from both the Fedore Project and Red Hat) I consistently get the
following results:

root at huey:/tmp# virsh list --all
 Id    Name                           State
----------------------------------------------------
 9     e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f running
 -     81c50b5a-24ef-47d5-88ae-16ee7f4f9537 shut off
 -     acd06610-c919-450b-97c8-8e49b9a0d45c shut off

root at huey:/tmp# virsh migrate --live --p2p
e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f qemu+ssh://10.10.11.204/system
error: Failed to open file
'/mnt/store01/virt/e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2': No such
file or directory

root at huey:/tmp# ls -al /mnt/store01/virt
total 9140768
drwxr-xr-x  2 libvirt-qemu kvm        4096 Sep  3 10:17 .
drwxr-xr-x 13 root         root       4096 Aug 28 10:39 ..
-rw-r--r--  1 libvirt-qemu kvm  3271688192 Aug 29 14:39
81c50b5a-24ef-47d5-88ae-16ee7f4f9537.qcow2
-rw-r--r--  1 libvirt-qemu kvm  2523136000 Aug 29 14:47
acd06610-c919-450b-97c8-8e49b9a0d45c.qcow2
-rw-r--r--  1 libvirt-qemu kvm  3565486080 Sep  3 13:52
e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2

root at dewey:~ >ls -al /mnt/store01/virt
total 8
drwxrwxrwx  2 libvirt-qemu kvm  4096 Sep  3 12:30 .
drwxr-xr-x 13 root         root 4096 Aug 29 16:36 ..
root at dewey:~ >

(huey is 10.10.11.203, dewey is 10.10.11.204; DNS works, but I thought to
eliminate that as a source of this problem.) As can be seen, the .qcow2
files exists on the source system, and does not exist on the target system.
The directory shown is where images are to be stored. There is no problem
starting and stopping VMs on the systems. It is not at all clear where the
failure is occurring; there is no documentation that discusses this
failure, of course.

I believe that I am invoking a basic migration per every page I can find in
a web search. Please correct any errors.

I am working as root on both systems, and use ssh to get from one system to
another, no passwords, no authentication required. All works well.

Any observations, or suggestions as to what configuration parameters I
should check, would be greatly appreciated.

Thank you.

Gary
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