[rdo-dev] Cinder NFS backend issue

[Tzach Shefi]

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
>
>
>
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-- 

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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