[ovirt-users] ovirt don't give "initiator name" to cinder when I'm launching a VM with a cinder volume

[herve]

dear ovirt user community,

I can't sort out an ovirt issue I got with cinder for weeks, I hope 
someone could give me a clue...
 From mi ovirt manager 4.1, I can create and delete a cinder volume or 
attach and detach a cider vomume from an ovirt  VM.

The problem is I never had been able to launch an ovirt VM with a cinder 
volume attached to it.
I just got a simple message from ovir web gui:  "Failed to run VM 
centoscinder (User: admin at internal-authz)".

what i am using is
a RDO newton release of openstack. the backend of cinder is a local lvm, 
and the openstack VMs can use the cinder volumes from other compute node.
from the ovirt 4.1 fedora 24 server:
[root at rhevf24 ~]# rpm -qa | grep ovirt-engine-4
ovirt-engine-4.1.0.4-1.fc24.noarch
ovirt-engine-setup-plugin-ovirt-engine-4.1.0.4-1.fc24.noarch
[root at rhevf24 ~]#

from the ovirt server , through the iscsiadm command,  I can see for 
example the 2 disks attached to 2 diffents  openstack instances,
but not the one I just created from ovirt which is attached to nothing , 
from the openstack rdo point of view.
[root at rhevf24 iscsi]# iscsiadm -m discovery -t sendtargets -p 192.168.122.36
192.168.122.36:3260,1 
iqn.2010-10.org.openstack:volume-f4c6c55c-e383-4781-8d24-d41b55870d29
192.168.122.36:3260,1 
iqn.2010-10.org.openstack:volume-58844340-741e-45da-9aa7-b0ed08391df3

as I said previously From ovirt I can create /delete in cinder and 
attach/detach volumes to ovirt VMs I don't get any troubles with that.

----
in ovirt engine.log almost nothing , except it can't aquire lock.. but 
in openstack cinder, and with tcpdump I get more informations.
tcpdump give me when ovirt intent the iscsi connection something like:
json.key == "os-initialize_connection"
{.  "os-initialize_connection" : {.    "connector"  :  {  }, },}

and I get from "tail -f  /var/log/cinder/volume.log" :
2017-03-07 16:45:06.889 3856 ERROR cinder.volume.targets.iscsi 
[req-b6d39a14-f9ea-4552-91e7-5db811217b1e 
dd1dd33789274fb7ba228c75a07c0e94 0f68893965dd4f5dafd319cbffb33bb4 - 
default default] The volume driver requires the iSCSI initiator name in 
the connector.
...
...
2017-03-07 16:45:06.891 3856 ERROR oslo_messaging.rpc.server 
InvalidInput: Invalid input received: Connector doesn't have required 
information: initiator


So it looks like I didn't get  or I can't provide the initiator name I 
want to be connected to.
Cinder can't obviously guess which one I want. that's more or less 
what's the cinder's logs are telling me.

I have searched for a long time in internet, it looks like  at least 
since ovirt 3.6, cinder is ont anymore an issue, and can even be 
integrated with a ceph back end to ovirt...
cinder model an client are installed in the ovirt server...

Somebody get any clue to tell ma where i made a mistake in the cinder 
integration with ovirt , which seems to be correct regarding the 
create/delete attach /detach volume behavior...

Thank you

Herve