[OpenIndiana-discuss] problems iSCSI booting from clone LUN /= 0

[Udo Grabowski (IMK)]

On 19/12/2016 14:38, Till Wegmüller wrote:
> Hmm.
> We once had Problems with Multipathing and Networking in certain setups mostly
> when passing into another subnet via a Router. Try Single Path and see what
> happens. In the Linux Iscsi Client Multipath is only configured with a simple
> true/false flag. Multipathing usually does not need seperate config for each
> path. You give it the Target and LUN Number and it makes as many Paths as it
> thinks are reasonable. (Usually Number of Physical Ethernet Interfaces)

As said, we've not confifured any pathes, it finds two, but there's really
only one single physical connection, the e1000g network device. I don't
see how it gets two pathes out of that (something strange in scsi_vhci ?).

>
> Also try to check the dependencies of the ISCSI Service and then Update the
> Boot_archive. As the ISCSI needs to be in the Boot archive so every change you
> do you need to update the Boot archive. Even if you make a new Clone I woud say.
>

we always update the boot-archive in our clone procedure, and I always do that
when fiddling there hands on. The /etc/iscsi/iscsi.db* files seem not to be
part of the archive, but we configured only the correct node name there, not
any target (also tried that, but it didn't help).

> Maybe there is also a Way to push the first ISCSI Connection after that network
> reconnect. I once had a Crashed ISCSI Client that did not want to Log into the
> Target because the Target still thought the client was connected. So I had to
> kick the Client on the Target Side.

But how if you don't get any access ? Tried with -kd, but ::prtconf
in the kernel debugger only freezes because it looses the network.

Also tried to use the volume as a disk on a different machine, and
boot from it with qemu-kvm ... -hda=/dev/rdsk/cxtyd0s0, but it freezes
already when reading the grub menu, that seems not to work like a
usual disk.
-- 
Dr.Udo Grabowski   Inst.f.Meteorology & Climate Research IMK-ASF-SAT
http://www.imk-asf.kit.edu/english/sat.php
KIT - Karlsruhe Institute of Technology           http://www.kit.edu
Postfach 3640,76021 Karlsruhe,Germany T:(+49)721 608-26026 F:-926026