No worries, can definitely do that.
Cheers
Aaron
On Thu, Jan 16, 2020 at 8:08 PM Jeff Layton <jlayton@xxxxxxxxxx> wrote:
On Thu, 2020-01-16 at 18:42 -0500, Jeff Layton wrote:
> On Wed, 2020-01-15 at 08:05 -0500, Aaron wrote:
> > Seeing a weird mount issue. Some info:
> >
> > No LSB modules are available.
> > Distributor ID: Ubuntu
> > Description: Ubuntu 18.04.3 LTS
> > Release: 18.04
> > Codename: bionic
> >
> > Ubuntu 18.04.3 with kerne 4.15.0-74-generic
> > Ceph 14.2.5 & 14.2.6
> >
> > With ceph-common, ceph-base, etc installed:
> >
> > ceph/stable,now 14.2.6-1bionic amd64 [installed]
> > ceph-base/stable,now 14.2.6-1bionic amd64 [installed]
> > ceph-common/stable,now 14.2.6-1bionic amd64 [installed,automatic]
> > ceph-mds/stable,now 14.2.6-1bionic amd64 [installed]
> > ceph-mgr/stable,now 14.2.6-1bionic amd64 [installed,automatic]
> > ceph-mgr-dashboard/stable,stable,now 14.2.6-1bionic all [installed]
> > ceph-mon/stable,now 14.2.6-1bionic amd64 [installed]
> > ceph-osd/stable,now 14.2.6-1bionic amd64 [installed]
> > libcephfs2/stable,now 14.2.6-1bionic amd64 [installed,automatic]
> > python-ceph-argparse/stable,stable,now 14.2.6-1bionic all [installed,automatic]
> > python-cephfs/stable,now 14.2.6-1bionic amd64 [installed,automatic]
> >
> > I create a user via get-or-create cmd, and I have a users/secret now.
> > When I try to mount on these Ubuntu nodes,
> >
> > The mount cmd I run for testing is:
> > sudo mount -t ceph -o
> > name=user-20c5338c-34db-11ea-b27a-de7033e905f6,secret=AQC6dhpeyczkDxAAhRcr7oERUY4BcD2NCUkuNg==
> > 10.10.10.10:6789:/work/20c5332d-34db-11ea-b27a-de7033e905f6 /tmp/test
> >
> > I get the error:
> > couldn't finalize options: -34
> >
> > From some tracking down, it's part of the get_secret_option() in
> > common/secrets.c and the Linux System Error:
> >
> > #define ERANGE 34 /* Math result not representable */
> >
> > Now the weird part...when I remove all the above libs above, the mount
> > command works. I know that there are ceph.ko modules in the Ubuntu
> > filesystems DIR, and that Ubuntu comes with some understanding of how
> > to mount a cephfs system. So, that explains how it can mount
> > cephfs...but, what I don't understand is why I'm getting that -34
> > error with the 14.2.5 and 14.2.6 libs installed. I didn't have this
> > issue with 14.2.3 or 14.2.4.
>
> This sounds like a regression in mount.ceph, probably due to something
> that went in for v14.2.5. I can reproduce the problem on Fedora, and I
> think it has something to do with the very long username you're using.
>
> I'll take a closer look and let you know. Stay tuned.
>
I think I see the issue. The SECRET_OPTION_BUFSIZE is just too small for
your use case. We need to make that a little larger than the largest
name= parameter can be. Prior to v14.2.5, it was ~1000 bytes, but I made
it smaller in that set thinking that was too large. Mea culpa.
The problem is determining how big that size can be. AFAICT EntityName
is basically a std::string in the ceph code, which can be an arbitrary
size (up to 4g or so).
Aaron, would you mind opening a bug for this at tracker.ceph.com? We
should be able to get it fixed up, once I do a bit more research to
figure out how big to make this buffer.
--
Jeff Layton <jlayton@xxxxxxxxxx>
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