[libvirt-users] Does virsh actually work?
Brian Rak
brak at gameservers.com
Wed Sep 3 19:12:19 UTC 2014
Try creating a blank file on the target system at
/mnt/store01/virt/e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2 on 'dewey'.
Migrations really don't go well when the target disk doesn't exist. I'm
not certain why this is, I think the migration feature was mainly built
with shared storage in mind.
On 9/3/2014 3:05 PM, Gary Hook wrote:
> 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
> <http://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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