libvirt users - Jun 2015 - Re: Missing "block-stream" command in qemu-kvm

Hi all,
I’m experiencing an interesting issue where I’m attempting to consolidate my
snapshots’ backing images on my qemu-kvm install by way of the virsh blockpull
and/or virsh blockcommit commands and receiving the error that my system can not
locate the “block-stream” command.  I can’t seem to find much related to this
issue by way of my Google research outside of some Bugzilla posts, which leads
me to believe that perhaps I’ve missed something during my install, maybe there
is an ancillary package I need to install?

I’m running qemu-kvm-0.12.1.2-2.448.el6_6.3.x86_64 with
libvirt-0.10.2-29.el6_5.12.x86_64 on CentOS 6.6.

If anyone has experienced this issue before, advise would be greatly
appreciated.

Thanks,
Dallas G.

On 06/03/2015 10:26 AM, Dallas Graves wrote:
> Hi all,
[can you configure your mailer to wrap long lines?]
> I’m running qemu-kvm-0.12.1.2-2.448.el6_6.3.x86_64 with
libvirt-0.10.2-29.el6_5.12.x86_64 on CentOS 6.6.
There's your problem.  'qemu-kvm' on CentOS 6 does not support live
disk
operations, because it was derived from RHEL 6 where Red Hat did not
choose to backport the functionality unless you upgraded to RHEV.

Quoting from an earlier mail from Paolo Bonzini:

Luckily, since you are using CentOS you do not really care about
official Red Hat RPMs, and you can get the packages here (well, this is
for CentOS 7, I'm not sure if there is a similar repo for CentOS 6):

http://resources.ovirt.org/pub/ovirt-3.5/rpm/el7Server/

This yum repository file will help:

    [qemu-kvm-rhev]
    name=oVirt rebuilds of qemu-kvm-rhev
    baseurl=http://resources.ovirt.org/pub/ovirt-3.5/rpm/el7Server/

mirrorlist=http://resources.ovirt.org/pub/yum-repo/mirrorlist-ovirt-3.5-el7Server
    enabled=1
    skip_if_unavailable=1
    gpgcheck=0

Drop it in /etc/yum.repos.d/qemu-kvm-rhev.repo and install qemu-kvm-rhev
with yum.  All features will be available.  It would be simpler to have
a CentOS SIG build this, but it hasn't happened yet.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

Thanks Eric.  Looks like they do have an official 6.6 EL repo which I’ll use.

Thanks,
Dallas Graves
(972) 837-0397


> On Jun 3, 2015, at 12:09 PM, Eric Blake <eblake@redhat.com> wrote:
> 
> On 06/03/2015 10:26 AM, Dallas Graves wrote:
>> Hi all,
> 
> [can you configure your mailer to wrap long lines?]
> 
>> I’m running qemu-kvm-0.12.1.2-2.448.el6_6.3.x86_64 with
libvirt-0.10.2-29.el6_5.12.x86_64 on CentOS 6.6.
> 
> There's your problem.  'qemu-kvm' on CentOS 6 does not support
live disk
> operations, because it was derived from RHEL 6 where Red Hat did not
> choose to backport the functionality unless you upgraded to RHEV.
> 
> Quoting from an earlier mail from Paolo Bonzini:
> 
> Luckily, since you are using CentOS you do not really care about
> official Red Hat RPMs, and you can get the packages here (well, this is
> for CentOS 7, I'm not sure if there is a similar repo for CentOS 6):
> 
> http://resources.ovirt.org/pub/ovirt-3.5/rpm/el7Server/
> 
> This yum repository file will help:
> 
>    [qemu-kvm-rhev]
>    name=oVirt rebuilds of qemu-kvm-rhev
>    baseurl=http://resources.ovirt.org/pub/ovirt-3.5/rpm/el7Server/
> 
>
mirrorlist=http://resources.ovirt.org/pub/yum-repo/mirrorlist-ovirt-3.5-el7Server
>    enabled=1
>    skip_if_unavailable=1
>    gpgcheck=0
> 
> Drop it in /etc/yum.repos.d/qemu-kvm-rhev.repo and install qemu-kvm-rhev
> with yum.  All features will be available.  It would be simpler to have
> a CentOS SIG build this, but it hasn't happened yet.
> 
> -- 
> Eric Blake   eblake redhat com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
>