Re: Qemu fails to open RBD image when auth_supported is not set to 'none'

[Wido den Hollander <wido@widodh.nl>]

On 06/25/2012 05:20 PM, Wido den Hollander wrote:
> Hi,
>
> I just tried to start a VM with libvirt with the following disk:
>
> <disk type='network' device='disk'>
>    <driver name='qemu' type='raw' cache='none'/>
>    <source protocol='rbd' name='rbd/8489c04f-aab8-4796-a22a-ebaa7be247a7'>
>      <host name='31.25.XX.XX' port='6789'/>
>    </source>
>    <target dev='vda' bus='virtio'/>
> </disk>
>
> That fails with: "Operation not supported"
>
> I tried qemu-img:
>
> qemu-img info
> rbd:rbd/8489c04f-aab8-4796-a22a-ebaa7be247a7:mon_host=31.25.XX.XX\\:6789
>
> Same result.
>
> I then tried:
>
> qemu-img info
> rbd:rbd/8489c04f-aab8-4796-a22a-ebaa7be247a7:mon_host=31.25.XX.XX\\:6789:auth_supported=none
>
>
> And that worked :)
>
> This host does not have a local ceph.conf, all the parameters have to
> come from the command line.
>
> I know that recently auth_supported defaults to "cephx", but that now
> break the libvirt integration since it doesn't set auth_supported to
> explicitly none when no auth section is present.
>
> Should this be something that gets fixed in librados or in libvirt?

Thought about it, this is something in libvirt :)

>
> If it's libvirt, I'll write a patch for it :)

Just did so, very simple patch: 
https://www.redhat.com/archives/libvir-list/2012-June/msg01119.html

Wido

>
> Wido
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