[ovirt-users] Trouble Connecting ISCSI Storage to Hosted Engine

[Simone Tiraboschi]

On Tue, Nov 14, 2017 at 3:12 PM, Kyle Conti <kconti at boston-engineering.com>
wrote:

> Hello,
>
> I'm brand new to Ovirt and trying to get my Hosted Engine setup configured
> with ISCSI storage.  I have ~8TB usable storage available on an LVM
> partition.  This storage is on the same server that is hosting the ovirt
> engine virtual machine.  After I use the discovery/sendtargets command via
> Centos 7 engine vm, it shows the correct IQN.  When I use ovirt's storage
> discovery in GUI, I can see the storage IQN just fine as well, but when I
> try to connect to it, I get the following:
>
> "Error while executing action: Failed to login to iSCSI node due to
> authorization failure"
>
>
Could you please attach vdsm logs from the host for the relevant time frame?


> Is NFS recommended instead when trying to connect the storage from server
> host to Ovirt Engine VM?  There is nothing in this storage domain yet.
> This is a brand new setup.
>

NFS consumed in loop-back could be problematic, iSCSI and gluster looks as
better options if you want to have everything on a single machine.


> One other thing to note...I have iscsi storage working with a NAS for my
> ISO storage domain.  I don't want to use the NAS for the virtual machine
> storage domain.  What's so different about the Ovirt Engine vm?
>

The hosted-engine VM is a special VM since it's running the engine that
manages your system. It should have its own storage domain since we are
preventing a few actions there to avoid blocking the engine while it's
working so, in order to avoid preventing some flows on regular VMs, the
hosted-engine VM and other VMs should be into distinct storage domains.


>
> Any help would be much appreciated.  Please let me know If I'm taking the
> wrong approach here, or I'm trying to do something that this system is not
> meant to do.
>
> Regards,
>
>
> *KC*
>
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