[ovirt-users] oVirt 4.0.1 on FC23: problem mounting NFSv4 with fsid=0

[Idan Shaby]

Hi Wodel,

Can you please verify that the patch that Nir sent [1] indeed solves the
problem?
You can use "git fetch https://gerrit.ovirt.org/vdsm
refs/changes/79/61579/2 && git checkout FETCH_HEAD".

Thanks,
Idan

On Wed, Jul 27, 2016 at 11:36 PM, Nir Soffer <nsoffer at redhat.com> wrote:

> On Wed, Jul 27, 2016 at 10:41 PM, Nir Soffer <nsoffer at redhat.com> wrote:
> > On Wed, Jul 27, 2016 at 6:07 PM, Nir Soffer <nsoffer at redhat.com> wrote:
> >> On Wed, Jul 27, 2016 at 4:57 PM, Idan Shaby <ishaby at redhat.com> wrote:
> >>> Hi,
> >>>
> >>> Can you please attach the vdsm log so we can get all the details?
> >>>
> >>>
> >>> Thanks,
> >>> Idan
> >>>
> >>> On Wed, Jul 27, 2016 at 4:24 PM, wodel youchi <wodel.youchi at gmail.com>
> >>> wrote:
> >>>>
> >>>> Hi,
> >>>>
> >>>> I wanted to test the new version of oVirt the 4.0.1 on FC23, using HE
> >>>> method and using NFSv4 for storage.
> >>>>
> >>>> When launching the deploy command, and choosing nfsv4 and filling the
> >>>> mount point, the setup exits with error : Connection to storage server
> >>>> failed.
> >>>>
> >>>> In vdsm log I have this error:
> >>>> Could not connect to storageServer
> >>>> Traceback (most recent call last):
> >>>> ...
> >>>> OSError: [Errno 2] Mount of `noveria.wodel.wd:/engine_vm` at
> >>>> `/rhev/data-center/mnt/noveria.wodel.wd:_engine__vm` does not exist
> >>>>
> >>>> the df -h command shows that the nfs mount was done, but the device
> path
> >>>> contains a double slash.
> >>>> noveria.wodel.wd://vmengine  656G  111G  513G  18%
> >>>> /rhev/data-center/mnt/noveria.wodel.wd:_vmengine
> >>
> >> Can you share the output of:
> >>
> >>     cat /proc/mounts
> >>
> >> This is what vdsm is using the check if a mount exists.
> >>
> >>>>
> >>>>
> >>>> I am not sure of the problem, but I think it's the double slash on the
> >>>> nfs4 path when using fsid=0: noveria.wodel.wd://vmengine
> >>
> >> Vdsm is normalizing the mount path - when you try to mount:
> >>
> >>      noveria.wodel.wd://vmengine
> >>
> >> Vdsm normalize the path to:
> >>
> >>      noveria.wodel.wd:/vmengine
> >>
> >> And it pass this value to the mount command.
> >>
> >> Vdsm expect that the kernel will not modify the value and return
> unormalized
> >> paths.
> >>
> >> This looks like an issue reported in the util-linux list:
> >> http://www.spinics.net/lists/util-linux-ng/msg13078.html
> >>
> >> According to the report, this is known issue in the kernel and unlikely
> to
> >> be fixed soon.
> >>
> >> So it seems that we do need to normalize also what the kernel returns
> >> in /proc/mounts.
> >
> > I posted these patches that should fix this issue.
> >
> https://gerrit.ovirt.org/#/q/status:open+project:vdsm+branch:ovirt-4.0+topic:backport/4.0/normalize-mounts
>
> Testing the nfs4 patch show that we need more work.
>
> In the meantime, can you check if using mount path with double slash
> (e.g. server://path) in engine works?
>
> Also, can you file a bug about this?
>
> Cheers,
> Nir
>
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