[ovirt-users] Moving from fc based to iSCSI based

[Gianluca Cecchi]

On Mon, Mar 20, 2017 at 5:56 PM, Gianluca Cecchi <gianluca.cecchi at gmail.com>
wrote:

> On Thu, Mar 9, 2017 at 1:01 PM, Fred Rolland <frolland at redhat.com> wrote:
>
>> I don't think it will work.
>> We rely heavily on LVM when working with iSCSI and FC and I am not sure
>> how LVM will handle this kind of operation.
>> A storage domain is a VG that contains PVs (LUNS), and each disk is a LV.
>>
>>
> Actually I executed several times raw "dd" operations to change internal
> disks of CentOS servers and in general they did have LVM structures with
> PV, VGs, LVs inside....
>
> Finally I had some time to test and it seems it worked without problems.
> I created a storage domain of 50Gb with 2 VMs on it and one of them had
> also a snapshot.
> I was able to import at target a dd-copy of it as an iSCSI domain without
> problems.
> I also created a template on the source domain, but its import fails: I
> get no error message at web admin gui level, but no action executed
> actually... on engine log file level I get an error of this type:
>
> 2017-03-19 01:37:24,387+01 ERROR [org.ovirt.engine.core.bll.CommandsFactory]
> (default task-11) [b7a5ef2f-694f-4d5a-851b-c52a5b1f0104] An exception has
> occurred while trying to create a command object for command '
> ImportVmTemplateFromConfiguration' with parameters
> 'ImportVmTemplateParameters:{commandId='ad3c8e81-4787-46bf-97cb-fe3bfa9f891e',
> user='null', commandType='Unknown'}': WELD-000049: Unable to invoke
> protected final void org.ovirt.engine.core.bll.CommandBase.postConstruct()
> on org.ovirt.engine.core.bll.exportimport.ImportVmTemplateFromConfigurat
> ionCommand at 353de47b
> 2017-03-19 01:37:24,388+01 ERROR [org.ovirt.engine.core.bll.
> PrevalidatingMultipleActionsRunner] (default task-11)
> [b7a5ef2f-694f-4d5a-851b-c52a5b1f0104] Failed to execute multiple actions
> of type 'ImportVmTemplateFromConfiguration': null
> 2017-03-19 01:37:24,388+01 ERROR [org.ovirt.engine.core.bll.
> PrevalidatingMultipleActionsRunner] (default task-11)
> [b7a5ef2f-694f-4d5a-851b-c52a5b1f0104] Exception:
> java.lang.NullPointerException
>         at org.ovirt.engine.core.bll.NestedCommandFactory.
> createWrappedCommand(NestedCommandFactory.java:24) [bll.jar:]
>
> Does it depend on the method or is there any problem in general in
> template import for storage domain import?
> See below for details of the approach used.
> Full engine logs and vdsm logs on target to crosscheck are here:
>
> vdsm logs
> https://drive.google.com/file/d/0BwoPbcrMv8mvUkhtejMxN0QxTUk/
> view?usp=sharing
>
> engine logs
> https://drive.google.com/file/d/0BwoPbcrMv8mvRGpHSU5jOU5IbTQ/
> view?usp=sharing
>


Any comment to previous e-mail? Are there any known problems with template
import?
Any chance to see the error logs provided?
Thanks,
Gianluca
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