Using Virtio-SCSI passthough on SCSI - Devices
--=-YX/fG1gxstd3trJ7hutY Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, does anyone have an idea on how to accomplish this? In my particular setup, I need a FC tape drive passed though to the vm. Note, passing throuh FC - LUNs works flawlessly.=20 If I understood Virtio -SCSI correctly, this should be possible from libvirt's part. Thanks! --=20 Daniel Helgenberger=20 m box bewegtbild GmbH=20 P: +49/30/2408781-22 F: +49/30/2408781-10 ACKERSTR. 19=20 D-10115 BERLIN=20 www.m-box.de www.monkeymen.tv=20 Gesch=C3=A4ftsf=C3=BChrer: Martin Retschitzegger / Michaela G=C3=B6llner Handeslregister: Amtsgericht Charlottenburg / HRB 112767=20 --=-YX/fG1gxstd3trJ7hutY Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIN9zCCBFcw ggM/oAMCAQICCwQAAAAAAS9O4TFGMA0GCSqGSIb3DQEBBQUAMFcxCzAJBgNVBAYTAkJFMRkwFwYD VQQKExBHbG9iYWxTaWduIG52LXNhMRAwDgYDVQQLEwdSb290IENBMRswGQYDVQQDExJHbG9iYWxT aWduIFJvb3QgQ0EwHhcNMTEwNDEzMTAwMDAwWhcNMTkwNDEzMTAwMDAwWjBUMQswCQYDVQQGEwJC RTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEqMCgGA1UEAxMhR2xvYmFsU2lnbiBQZXJzb25h bFNpZ24gMiBDQSAtIEcyMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwWtB+TXs+BJ9 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On 04/25/2014 04:40 PM, Daniel Helgenberger wrote:
Hello,
does anyone have an idea on how to accomplish this? In my particular setup, I need a FC tape drive passed though to the vm. Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from libvirt's part.
Thanks!
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
what exactly is the issue?
--=-4QPczlD6z+VDy2a06h7W Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello Itamar, sorry - forgot to mention that. I cannot 'see' the device in oVirt as external LUN. This might because dm-multipath is ignoring this device for some reason unknown to me; I only see the dm'ed LUNs. I did not temper with multipath.conf so far because it seems to be managed by ovirt... cheers, On Fr, 2014-04-25 at 16:42 +0300, Itamar Heim wrote:
On 04/25/2014 04:40 PM, Daniel Helgenberger wrote:
Hello,
does anyone have an idea on how to accomplish this? In my particular setup, I need a FC tape drive passed though to the vm. Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from libvirt's part.
Thanks!
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
=20 what exactly is the issue?
--=20 Daniel Helgenberger=20 m box bewegtbild GmbH=20 P: +49/30/2408781-22 F: +49/30/2408781-10 ACKERSTR. 19=20 D-10115 BERLIN=20 www.m-box.de www.monkeymen.tv=20 Gesch=C3=A4ftsf=C3=BChrer: Martin Retschitzegger / Michaela G=C3=B6llner Handeslregister: Amtsgericht Charlottenburg / HRB 112767=20 --=-4QPczlD6z+VDy2a06h7W Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIN9zCCBFcw ggM/oAMCAQICCwQAAAAAAS9O4TFGMA0GCSqGSIb3DQEBBQUAMFcxCzAJBgNVBAYTAkJFMRkwFwYD VQQKExBHbG9iYWxTaWduIG52LXNhMRAwDgYDVQQLEwdSb290IENBMRswGQYDVQQDExJHbG9iYWxT aWduIFJvb3QgQ0EwHhcNMTEwNDEzMTAwMDAwWhcNMTkwNDEzMTAwMDAwWjBUMQswCQYDVQQGEwJC RTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEqMCgGA1UEAxMhR2xvYmFsU2lnbiBQZXJzb25h bFNpZ24gMiBDQSAtIEcyMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwWtB+TXs+BJ9 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Am 25.04.2014 15:40, schrieb Daniel Helgenberger:
Hello,
does anyone have an idea on how to accomplish this? In my particular setup, I need a FC tape drive passed though to the vm. Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from libvirt's part.
I don't know how much of this is implemented, so a dev must step in, but it is designed at least, maybe it already works. take a look yourself at: http://www.ovirt.org/Features/Virtio-SCSI#Adding_a_DirectLUN_Disk_.28lun_pas... HTH -- Mit freundlichen Grüßen / Regards Sven Kieske Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
On Fri, 25 Apr 2014 13:40:09 +0000 Daniel Helgenberger <daniel.helgenberger@m-box.de> wrote:
Hello,
does anyone have an idea on how to accomplish this? In my particular setup, I need a FC tape drive passed though to the vm. Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from libvirt's part.
I can be wrong but my understanding is that dm-mpio works on block layer thus it does not support multipath for tapes/cd-devices. But I could be wrong, I got this info from an OpenBSD paper comparing SCSI multipath implementation. j.
--=-QCHujBjxxSJJ072LX7CG Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fr, 2014-04-25 at 17:19 +0200, Jiri Belka wrote:
On Fri, 25 Apr 2014 13:40:09 +0000 Daniel Helgenberger <daniel.helgenberger@m-box.de> wrote: =20
Hello, =20 does anyone have an idea on how to accomplish this? In my particular setup, I need a FC tape drive passed though to the vm. Note, passing throuh FC - LUNs works flawlessly.=20 =20 If I understood Virtio -SCSI correctly, this should be possible from libvirt's part. =20 I can be wrong but my understanding is that dm-mpio works on block layer thus it does not support multipath for tapes/cd-devices. =20 But I could be wrong, I got this info from an OpenBSD paper comparing SCSI multipath implementation. =20 j. No, I think so too - it does not support tape drive as such (but I could set up a tape library as a LUN to use it with LTFS for instance)
The point being is another. VirtIO SCSI should be able to pass through any scsi device; like tape drives end enclosures. I know this works in Proxmox: http://pve.proxmox.com/wiki/Tape_Drives Does it work in oVirt, too? 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For what it's worth, I'm also in need of this feature. Some way to make a scsi tape available to a VM. On Fri, Apr 25, 2014 at 12:01 PM, Daniel Helgenberger <daniel.helgenberger@m-box.de> wrote:
On Fr, 2014-04-25 at 17:19 +0200, Jiri Belka wrote:
On Fri, 25 Apr 2014 13:40:09 +0000 Daniel Helgenberger <daniel.helgenberger@m-box.de> wrote:
Hello,
does anyone have an idea on how to accomplish this? In my particular setup, I need a FC tape drive passed though to the vm. Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from libvirt's part.
I can be wrong but my understanding is that dm-mpio works on block layer thus it does not support multipath for tapes/cd-devices.
But I could be wrong, I got this info from an OpenBSD paper comparing SCSI multipath implementation.
j. No, I think so too - it does not support tape drive as such (but I could set up a tape library as a LUN to use it with LTFS for instance)
The point being is another. VirtIO SCSI should be able to pass through any scsi device; like tape drives end enclosures. I know this works in Proxmox: http://pve.proxmox.com/wiki/Tape_Drives
Does it work in oVirt, too? In the GUI I only see block LUNs from DM.
--
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On 04/25/2014 08:01 PM, Daniel Helgenberger wrote:
On Fr, 2014-04-25 at 17:19 +0200, Jiri Belka wrote:
On Fri, 25 Apr 2014 13:40:09 +0000 Daniel Helgenberger <daniel.helgenberger@m-box.de> wrote:
Hello,
does anyone have an idea on how to accomplish this? In my particular setup, I need a FC tape drive passed though to the vm. Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from libvirt's part.
I can be wrong but my understanding is that dm-mpio works on block layer thus it does not support multipath for tapes/cd-devices.
But I could be wrong, I got this info from an OpenBSD paper comparing SCSI multipath implementation.
j. No, I think so too - it does not support tape drive as such (but I could set up a tape library as a LUN to use it with LTFS for instance)
The point being is another. VirtIO SCSI should be able to pass through any scsi device; like tape drives end enclosures. I know this works in Proxmox: http://pve.proxmox.com/wiki/Tape_Drives
Does it work in oVirt, too? In the GUI I only see block LUNs from DM.
i suggest you try making it work via libivrt first, then we can compare to the xml passed to the guest, workaround with a custom hook, etc.
looks like libvirt should be able to do it with it's hostdev entries. http://libvirt.org/formatdomain.html#elementsHostDevSubsys <devices> <hostdev mode='subsystem' type='scsi'> <source> <adapter name='scsi_host0'/> <address type='scsi' bus='0' target='0' unit='0'/> </source> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </hostdev> </devices> ... On Sat, Apr 26, 2014 at 4:09 AM, Itamar Heim <iheim@redhat.com> wrote:
On 04/25/2014 08:01 PM, Daniel Helgenberger wrote:
On Fr, 2014-04-25 at 17:19 +0200, Jiri Belka wrote:
On Fri, 25 Apr 2014 13:40:09 +0000 Daniel Helgenberger <daniel.helgenberger@m-box.de> wrote:
Hello,
does anyone have an idea on how to accomplish this? In my particular setup, I need a FC tape drive passed though to the vm. Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from libvirt's part.
I can be wrong but my understanding is that dm-mpio works on block layer thus it does not support multipath for tapes/cd-devices.
But I could be wrong, I got this info from an OpenBSD paper comparing SCSI multipath implementation.
j.
No, I think so too - it does not support tape drive as such (but I could set up a tape library as a LUN to use it with LTFS for instance)
The point being is another. VirtIO SCSI should be able to pass through any scsi device; like tape drives end enclosures. I know this works in Proxmox: http://pve.proxmox.com/wiki/Tape_Drives
Does it work in oVirt, too? In the GUI I only see block LUNs from DM.
i suggest you try making it work via libivrt first, then we can compare to the xml passed to the guest, workaround with a custom hook, etc.
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On 04/28/2014 03:54 AM, Jeremiah Jahn wrote:
looks like libvirt should be able to do it with it's hostdev entries.
http://libvirt.org/formatdomain.html#elementsHostDevSubsys
<devices> <hostdev mode='subsystem' type='scsi'> <source> <adapter name='scsi_host0'/> <address type='scsi' bus='0' target='0' unit='0'/> </source> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </hostdev> </devices> ...
so i think 'hostusb' would be a very good match for a custom hook: http://www.ovirt.org/VDSM-Hooks http://www.ovirt.org/VDSM-Hooks_Catalogue http://gerrit.ovirt.org/gitweb?p=vdsm.git;a=tree;f=vdsm_hooks;
On Sat, Apr 26, 2014 at 4:09 AM, Itamar Heim <iheim@redhat.com> wrote:
On 04/25/2014 08:01 PM, Daniel Helgenberger wrote:
On Fr, 2014-04-25 at 17:19 +0200, Jiri Belka wrote:
On Fri, 25 Apr 2014 13:40:09 +0000 Daniel Helgenberger <daniel.helgenberger@m-box.de> wrote:
Hello,
does anyone have an idea on how to accomplish this? In my particular setup, I need a FC tape drive passed though to the vm. Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from libvirt's part.
I can be wrong but my understanding is that dm-mpio works on block layer thus it does not support multipath for tapes/cd-devices.
But I could be wrong, I got this info from an OpenBSD paper comparing SCSI multipath implementation.
j.
No, I think so too - it does not support tape drive as such (but I could set up a tape library as a LUN to use it with LTFS for instance)
The point being is another. VirtIO SCSI should be able to pass through any scsi device; like tape drives end enclosures. I know this works in Proxmox: http://pve.proxmox.com/wiki/Tape_Drives
Does it work in oVirt, too? In the GUI I only see block LUNs from DM.
i suggest you try making it work via libivrt first, then we can compare to the xml passed to the guest, workaround with a custom hook, etc.
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participants (5)
-
Daniel Helgenberger -
Itamar Heim -
Jeremiah Jahn -
Jiri Belka -
Sven Kieske