On May 21, 2019 06:00, Satheesaran Sundaramoorthi <sasundar@redhat.com> wrote:

On Fri, May 17, 2019 at 1:12 AM Nir Soffer <nsoffer@redhat.com> wrote:

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On Thu, May 16, 2019 at 10:12 PM Darrell Budic <budic@onholyground.com> wrote:

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On May 16, 2019, at 1:41 PM, Nir Soffer <nsoffer@redhat.com> wrote:

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On Thu, May 16, 2019 at 8:38 PM Darrell Budic <budic@onholyground.com> wrote:

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I tried adding a new storage domain on my hyper converged test cluster running Ovirt 4.3.3.7 and gluster 6.1. I was able to create the new gluster volume fine, but it’s not able to add the gluster storage domain (as either a managed gluster volume or directly entering values). The created gluster volume mounts and looks fine from the CLI. Errors in VDSM log:

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2019-05-16 10:25:09,584-0500 ERROR (jsonrpc/5) [storage.fileSD] Underlying file system doesn't supportdirect IO (fileSD:110) 2019-05-16 10:25:09,584-0500 INFO  (jsonrpc/5) [vdsm.api] FINISH createStorageDomain error=Storage Domain target is unsupported: () from=::ffff:10.100.90.5,44732, flow_id=31d993dd, task_id=ecea28f3-60d4-476d-9ba8-b753b7c9940d (api:52)

The direct I/O check has failed.

So something is wrong in the files system.

To confirm, you can try to do:

dd if=/dev/zero of=/path/to/mountoint/test bs=4096 count=1 oflag=direct

This will probably fail with: dd: failed to open '/path/to/mountoint/test': Invalid argument

If it succeeds, but oVirt fail to connect to this domain, file a bug and we will investigate.

Nir

Yep, it fails as expected. Just to check, it is working on pre-existing volumes, so I poked around at gluster settings for the new volume. It has network.remote-dio=off set on the new volume, but enabled on old volumes. After enabling it, I’m able to run the dd test:

[root@boneyard mnt]# gluster vol set test network.remote-dio enable volume set: success [root@boneyard mnt]# dd if=/dev/zero of=testfile bs=4096 count=1 oflag=direct 1+0 records in 1+0 records out 4096 bytes (4.1 kB) copied, 0.0018285 s, 2.2 MB/s

I’m also able to add the storage domain in ovirt now.

I see network.remote-dio=enable is part of the gluster virt group, so apparently it’s not getting set by ovirt duding the volume creation/optimze for storage?

I'm not sure who is responsible for changing these settings. oVirt always required directio, and we never had to change anything in gluster.

Sahina, maybe gluster changed the defaults?

Darrell, please file a bug, probably for RHHI.

Hello Darrell & Nir,

Do we have a bug available now for this issue ? I just need to make sure performance.strict-o-direct=on is enabled on that volume.

Satheesaran Sundaramoorthi

Senior Quality Engineer, RHHI-V QE

Red Hat APAC

Please check https://bugzilla.redhat.com/show_bug.cgi?id=1711054 Best Regards, Strahil Nikolov