[Users] could not add iscsi disk in ovirt.

Fri Sep 27 15:40:02 EDT 2013

Dafna Ron wrote:
> you don't have to reconfigure engine to create iscsi pool.
> you can create multiple pools, the only limitation is that you will 
> need a host for the each of the DCs.
> but you can move one host from one DC to another...
> so if you have 2 hosts just create a new DC and move one of the hosts 
> there.
>
> I think that the direct lun is only for iscsi and fiber but I can give 
> you a 100% certainty answer on Monday.
>
>
>
> I don't think its supported for NFS... I can check for you on Monday 
> for sure.
>
>
> On 09/27/2013 03:28 PM, Saurabh wrote:
>> On 27/09/13 19:52, Dafna Ron wrote:
>>> wait :)
>>>
>>> the first screen shot was of local storage and internal disk type - 
>>> not related at all to the direct lun feature.
>>>
>>> the second screen shot is for iscsi storage pool.
>>> it shows a current connected lun that you have.
>>>
>>> try this:
>>>
>>> create a new target lun.
>>> log in to the webadmin -> disks tab -> new disk
>>> select the Default DC (which is your iscsi storage type) -> expend 
>>> the "discover tartest"
>>> put in your storage server (where you created the lun) -> discover
>>> you should than see a list of targets -> log in
>>> select the target and press OK.
>>>
>>>
>>> On 09/27/2013 03:11 PM, Saurabh wrote:
>>>> On 27/09/13 19:14, Dafna Ron wrote:
>>>>> the output is empty in both your outpit and the logs.
>>>>>
>>>>> This is the part in the log that shows that you do not have any 
>>>>> devices: return: []
>>>>>
>>>>> when you create a new disk and select the NFS DC- can you please 
>>>>> send me the screen shot of that?
>>>>>
>>>>>
>>>>> On 09/27/2013 02:41 PM, Saurabh wrote:
>>>>>> On 27/09/13 18:40, Dafna Ron wrote:
>>>>>>> I am not sure direct lun will be supported for an NFS pool... 
>>>>>>> can you try the same from iscsi pool?
>>>>>>>
>>>>>>> is this lun being used somewhere else or did you create a new one?
>>>>>>> you can run vdsClient -s 0 getDeviceList to see the list of the 
>>>>>>> available luns and if the status is free or not.
>>>>>>> (it should also in the logs (engine and vdsm) when you discover 
>>>>>>> the luns from the webadmin.
>>>>>>>
>>>>>>>
>>>>>>> On 09/27/2013 01:43 PM, Saurabh wrote:
>>>>>>>>
>>>>>>>> Hi guys, I am running ovirt with NFS as storage pool. 
>>>>>>>> Everything is working quite fine for me. The only problem is I 
>>>>>>>> could not add the a new iscsi disk in Disk tab. When I go to 
>>>>>>>> the Disk tab there is an option of adding new disk from 
>>>>>>>> internal storage and another option is add External (Direct 
>>>>>>>> Lun). When I opt for the External (Direct LUN), I am able to 
>>>>>>>> discover the Lun but could not log in to that lun using the 
>>>>>>>> ovirt web console. Whereas when I try to login to that lun 
>>>>>>>> using the isciadm in command line I am able to login. Any help??
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Users mailing list
>>>>>>>> Users at ovirt.org
>>>>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>>>>
>>>>>>>
>>>>>> I have created a new Lun for this purpose only and it is not 
>>>>>> being used anywhere.
>>>>>> In order to try an iscsi pool I will have to reconfigure the 
>>>>>> engine, because during the engine setup I opted for nfs.
>>>>>>
>>>>>> This is the output when I  run this command.
>>>>>>
>>>>>> [root at ovirt ~]# vdsClient -s 0 getDeviceList
>>>>>> []
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> this is log snippet from engine.log when I discover and try to 
>>>>>> login to that lun.
>>>>>>
>>>>>>
>>>>>> ################################################################################################# 
>>>>>>
>>>>>> 013-09-27 14:34:55,592 INFO 
>>>>>> [org.ovirt.engine.core.vdsbroker.vdsbroker.DiscoverSendTargetsVDSCommand] 
>>>>>> (ajp--127.0.0.1-8702-11) START, 
>>>>>> DiscoverSendTargetsVDSCommand(HostName = 192.168.100.59, HostId = 
>>>>>> 168842b9-071b-4c64-a22d-07ae1e63830b, connection={ id: null, 
>>>>>> connection: 192.168.100.160, iqn: null, vfsType: null, 
>>>>>> mountOptions: null, nfsVersion: null, nfsRetrans: null, nfsTimeo: 
>>>>>> null };), log id: 2e12b97
>>>>>> 2013-09-27 14:34:55,653 INFO 
>>>>>> [org.ovirt.engine.core.vdsbroker.vdsbroker.DiscoverSendTargetsVDSCommand] 
>>>>>> (ajp--127.0.0.1-8702-11) FINISH, DiscoverSendTargetsVDSCommand, 
>>>>>> return: [{ id: null, connection: 192.168.100.160, iqn: 
>>>>>> iqn.2013.26.ovirt.techblue.lv001, vfsType: null, mountOptions: 
>>>>>> null, nfsVersion: null, nfsRetrans: null, nfsTimeo: null };], log 
>>>>>> id: 2e12b97
>>>>>> 2013-09-27 14:36:25,877 INFO 
>>>>>> [org.ovirt.engine.core.bll.storage.ConnectStorageToVdsCommand] 
>>>>>> (ajp--127.0.0.1-8702-2) Running command: 
>>>>>> ConnectStorageToVdsCommand internal: false. Entities affected : 
>>>>>> ID: aaa00000-0000-0000-0000-123456789aaa Type: System
>>>>>> 2013-09-27 14:36:25,880 INFO 
>>>>>> [org.ovirt.engine.core.vdsbroker.vdsbroker.ConnectStorageServerVDSCommand] 
>>>>>> (ajp--127.0.0.1-8702-2) START, 
>>>>>> ConnectStorageServerVDSCommand(HostName = 192.168.100.59, HostId 
>>>>>> = 168842b9-071b-4c64-a22d-07ae1e63830b, storagePoolId = 
>>>>>> 00000000-0000-0000-0000-000000000000, storageType = ISCSI, 
>>>>>> connectionList = [{ id: null, connection: 192.168.100.160, iqn: 
>>>>>> iqn.2013.26.ovirt.techblue.lv001, vfsType: null, mountOptions: 
>>>>>> null, nfsVersion: null, nfsRetrans: null, nfsTimeo: null };]), 
>>>>>> log id: 5fca13a4
>>>>>> 2013-09-27 14:36:26,012 INFO 
>>>>>> [org.ovirt.engine.core.vdsbroker.vdsbroker.ConnectStorageServerVDSCommand] 
>>>>>> (ajp--127.0.0.1-8702-2) FINISH, ConnectStorageServerVDSCommand, 
>>>>>> return: {00000000-0000-0000-0000-000000000000=0}, log id: 5fca13a4
>>>>>> 2013-09-27 14:36:26,098 INFO 
>>>>>> [org.ovirt.engine.core.vdsbroker.vdsbroker.GetDeviceListVDSCommand] 
>>>>>> (ajp--127.0.0.1-8702-12) START, GetDeviceListVDSCommand(HostName 
>>>>>> = 192.168.100.59, HostId = 168842b9-071b-4c64-a22d-07ae1e63830b, 
>>>>>> storageType=ISCSI), log id: 20fb893b
>>>>>> 2013-09-27 14:36:29,376 INFO 
>>>>>> [org.ovirt.engine.core.vdsbroker.vdsbroker.GetDeviceListVDSCommand] 
>>>>>> (ajp--127.0.0.1-8702-12) FINISH, GetDeviceListVDSCommand, return: 
>>>>>> [], log id: 20fb893b
>>>>>>
>>>>>> ###################################################################################################### 
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>> Here I am sending you the two screenshots, one is when I am adding 
>>>> the disk from the Local-storage that is NFS, and another is the 
>>>> Direct lun.
>>>> You can see that I am able to discover it but could not log into it.
>>>>
>>>
>>>
>> ok so there is no means we can use an iscsi disk in a Data center 
>> whoose default storage is NFS?
>
>
If I read the posts and interpret them correctly then it should work. I 
have a 'dummy' nfs DataCenter where I have lots of VMs which are using 
dedicated LUNS from an Equallogic storage array.
Just make sure that the node that you select has access rights on the 
LUN(s) that you want connected and that that LUN isn't already in use. 
We use this setup as an migration path to move the disk storage from 
ISCSI to NFS to GlusterFS.
I'm using oVirt-3.2.2 on Centos-6.4, feel free to ask further question.

Regards,

Joop