[rdo-dev] Cinder NFS backend issue

[Tzach Shefi]

Hey Cody,

The bad news, after our email figured I'd check Rocky's status, still not
working.
I've thus opened two new bugs, I'll clone these back for Queens and Pike as
well.
https://bugzilla.redhat.com/show_bug.cgi?id=1637014
https://bugzilla.redhat.com/show_bug.cgi?id=1637030

Any ways per debugging, as you rightfully mentioned docker.
As of Queens Cinder was containerized meaning:
log location: /var/log/container/cinder/cinder-volume.log
Config file path is :
/var/lib/config-data/puppet-generated/cinder/etc/cinder/
So nfs_shares should be found/reside under this path ^ path.

However if you login to Cinder's volume docker
# docker ps | grep cinder     somethign like
-> openstack-cinder-volume-docker-0
# docker exec -it openstack-cinder-volume-docker-0 /bin/bash
You should see cinder.conf plus the share file under /etc/cinder/
In side the docker /etc/cinder/ path is valid, outside of docker mapping
goes to /var/lib/config-data..

I'd me more than happy to take a look at your volume log,
should you be willing to share it in public or private with me.

Tzach



On Sun, Oct 7, 2018 at 7:38 PM Cody <codeology.lab at gmail.com> wrote:

> Hi Tzach,
>
> Thank you for getting back! I tested it again with
> CinderNfsMountOptions: 'rw,sync,nosharecache' in Queens, but still to
> no avail.
>
> I also noticed that the file /etc/cinder/nfs_shares does not exist on
> any controller, although in cinder.conf it has "#nfs_shares_config =
> /etc/cinder/nfs_shares". I am not sure if this is normal for using NFS
> with the containerized cinder service.
>
> Thank you,
> Cody
>
>
> On Sun, Oct 7, 2018 at 5:03 AM Tzach Shefi <tshefi at redhat.com> wrote:
> >
> >
> > Hey Cody,
> >
> > I recall hitting a related problem, when both Glance and Cinder use the
> same NFS server, while each service uses it's own share if both shares
> reside on same NFS server you may hit an selinux issue.
> >
> > The original bug I hit/reported, was closed EOL.
> > https://bugzilla.redhat.com/show_bug.cgi?id=1491597
> > Notice 4th comment, adding  nosharecache mount option helped me.
> >
> > I'll re-check this on queens as well maybe need to rebug it.
> > Thanks
> >
> > Tzach
> >
> >
> > On Sun, Oct 7, 2018 at 6:32 AM Cody <codeology.lab at gmail.com> wrote:
> >>
> >> Hi everyone,
> >>
> >> I have an issue with using TripleO (Queens) to setup an NFS backend for
> Cinder.
> >>
> >> My storage.yaml is as follows:
> >>
> >> parameter_defaults:
> >>   CinderEnableIscsiBackend: false
> >>   CinderEnableRbdBackend: false
> >>   CinderEnableNfsBackend: true
> >>   NovaEnableRbdBackend: false
> >>   GlanceBackend: 'file'
> >>
> >>   CinderNfsMountOptions: 'rw,sync'
> >>   CinderNfsServers: '192.168.24.1:/export/cinder'
> >>
> >>   GlanceNfsEnabled: true
> >>   GlanceNfsShare: '192.168.24.1:/export/glance'
> >>   GlanceNfsOptions:
> 'rw,sync,context=system_u:object_r:glance_var_lib_t:s0'
> >>
> >>   NovaNfsEnabled: true
> >>   NovaNfsShare: '192.168.24.1:/export/nova'
> >>   NovaNfsOptions: 'rw,sync,context=system_u:object_r:nfs_t:s0'
> >>
> >> I used the undercloud node as an NFS server for testing purposes.
> Iptables is set accordingly. The /etc/exportfs on the NFS server is as
> follows:
> >>
> >> /export/nova 192.168.24.0/24(rw,no_root_squash)
> >> /export/glance 192.168.24.0/24(rw,no_root_squash)
> >> /export/cinder 192.168.24.0/24(rw,no_root_squash)
> >>
> >> All three folders are set to chmod 777. Nova and Glance work as
> expected. Only Cinder remains problematic. I can try to upload volumes from
> overcloud, but nothing would show up in the cinder folder. Also Horizon
> gives errors like unable to retrieve volume and volume snapshots. Did I
> miss something here? I do plan to use Ceph later, but I wish to use NFS for
> now to test migration and failover. Any helps would be appreciated. Thank
> you!
> >>
> >> Best regards,
> >> Cody
> >>
> >>
> >>
> >> _______________________________________________
> >> dev mailing list
> >> dev at lists.rdoproject.org
> >> http://lists.rdoproject.org/mailman/listinfo/dev
> >>
> >> To unsubscribe: dev-unsubscribe at lists.rdoproject.org
> >
> >
> >
> > --
> >
> > Tzach Shefi
> >
> > Senior Quality Engineer, RHCSA
> >
> > Red Hat
> >
> > tshefi at redaht.com    M: +972-54-4701080     IM: tshefi
>


-- 

Tzach Shefi

Senior Quality Engineer, RHCSA

Red Hat

<https://www.redhat.com>

tshefi at redaht.com    M: +972-54-4701080     IM: tshefi
<https://red.ht/sig>
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