On 05/25/2016 02:00 AM, Martin Sivak wrote:

Hi,

I do not remember exacly, but you might check the source code of
hosted engine's VdsmBackend where we do that too.

https://gerrit.ovirt.org/gitweb?p=ovirt-hosted-engine-ha.git;a=blob;f=ovirt_hosted_engine_ha/lib/storage_backends.py;h=f2fbdc43d0e4afd7539a3a1de75de0cb07bdca9d;hb=a012f184584af20d3dba8038d73b8d9b447af7b3

I think you are missing the prepareImage call.

I think that prepareImage is probably the missing piece to this; however, it seems that the hosted engine's create_volume method with calls _get_volume_path which calls prepareImage.

vdsClient's prepareImage command takes a volume UUID as an agrument I've tried passing the new UUID I created for the createVolume command, the UUID returned from that command, and a fresh UUID. All of these return the same error: Volume does not exist

I've also tried manually creating the image directory under the storage domain directory with the same results for all commands.

Regards

--
Martin Sivak
SLA / oVirt

On Wed, May 25, 2016 at 1:44 AM, Hayley Swimelar <hayley@linbit.com> wrote:

Hello all,

Like the title says, I need to work with VDSM's storage layer without
involving the engine.

Presently, I'm testing this with NFS domains and have been able to use
vdsClient to create, attach, and activate a new storage domain, but I have
not been able to create a new image or volume.

Here are the commands I ran to get to this step, starting with a nfs volume
already mounted on the machine I ran the commands on.

----
vdsClient -s host_name createStorageDomain 1
97338d5c-9b6f-1859-b827-e977ed082e53 cli_domain storage_server:/data

vdsClient -s host_name attachStorageDomain
97338d5c-9b6f-1859-b827-e977ed082e53 00000001-0001-0001-0001-00000000033c

vdsClient -s host_name activateStorageDomain
97338d5c-9b6f-1859-b827-e977ed082e53 00000001-0001-0001-0001-00000000033c

vdsClient -s frodo createVolume 97338d5c-9b6f-1859-b827-e977ed082e53
00000001-0001-0001-0001-00000000033c 0288f410-71f1-4b7d-bdb7-e815a93e34ef
53690000000 5 1 2 96d7726c-6969-40a5-84bd-0925496b6051 cli_volume
----

The last command outputs a new UUID, but there is nothing under
/rhev/data-center/00000001-0001-0001-0001-00000000033c/97338d5c-9b6f-1859-b827-e977ed082e53/images/
directory.

If I pass createVolume an existing image/storage domain UUID, the command
still outputs a new UUID, but nothing changes under the images directory.

Is there a step that I am missing somewhere in this process?

--
Hayley Swimelar
LINBIT | Keeping the Digital World Running
DRBD — Corosync — Pacemaker
+1-503-573-1262 x212
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--
Hayley Swimelar
LINBIT | Keeping the Digital World Running
DRBD — Corosync — Pacemaker
+1-503-573-1262 x212
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