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From: Paul Durrant <xadimgnik@gmail.com>
To: "'Brian Marcotte'" <marcotte@panix.com>,
	"'Paul Durrant'" <xadimgnik@gmail.com>
Cc: 'Jules' <jules@ispire.me>,
	xen-devel@lists.xenproject.org, oleksandr_grytsov@epam.com,
	wl@xen.org
Subject: RE: [EXTERNAL] [Xen-devel] XEN Qdisk Ceph rbd support broken?
Date: Fri, 17 Jul 2020 08:48:01 +0100	[thread overview]
Message-ID: <003401d65c0e$995bb4f0$cc131ed0$@xen.org> (raw)
In-Reply-To: <20200716202331.GA9471@panix.com>

> -----Original Message-----
> From: Brian Marcotte <marcotte@panix.com>
> Sent: 16 July 2020 21:24
> To: Paul Durrant <xadimgnik@gmail.com>
> Cc: paul@xen.org; 'Jules' <jules@ispire.me>; xen-devel@lists.xenproject.org;
> oleksandr_grytsov@epam.com; wl@xen.org
> Subject: Re: [EXTERNAL] [Xen-devel] XEN Qdisk Ceph rbd support broken?
> 
> > Your issue stems from the auto-creation code in xen-block:
> >
> > The "aio:rbd:rbd/machine.disk0" string is generated by libxl and does
> > look a little odd and will fool the parser there, but the error you see
> > after modifying the string appears to be because QEMU's QMP block
> > device instantiation code is objecting to a missing parameter. Older
> > QEMUs circumvented that code which is almost certainly why you don't
> > see the issue with versions 2 or 3.
> 
> Xen 4.13 and 4.14 includes QEMU 4 and 5. They don't work with Ceph/RBD.
> 
> Are you saying that xl/libxl is doing the right thing and the problem
> needs to be fixed in QEMU?

Unfortunately, from what you describe, it sounds like there is a problem in both. To get something going, you could bring a domain
up paused and then try manually adding your rbd device using the QMP shell.

It would be useful if a toolstack maintainer could take a look at this issue in the near future.

  Paul

> 
> --
> - Brian



  reply	other threads:[~2020-07-17  7:48 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-03 17:34 [Xen-devel] XEN Qdisk Ceph rbd support broken? Jules
2020-02-04  8:53 ` Durrant, Paul
2020-07-15 19:17   ` Brian Marcotte
2020-07-16  7:13     ` [EXTERNAL] " Paul Durrant
2020-07-16 20:23       ` Brian Marcotte
2020-07-17  7:48         ` Paul Durrant [this message]
2020-09-28 14:27           ` Anthony PERARD
2020-09-29  9:17             ` Brian Marcotte

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