[ovirt-users] iscsi or iser targets are not detached from the host in the maintenance mode

[Arman Khalatyan]

The test disks are not attached to any virtual machine. nothing done on the
hosts.
 I just saw that the all test LUNs are still logged into target side so I
went to the host(it was in the maintenance ) all disks are still there.

I just managing everything over the web gui:
Select host as SPM, then disks->new->directLUN->discovertargets->login->ok
on the host the disks are visible.
iscsiadm -m session -o show
tcp: [6] 10.10.10.35:3260,1
iqn.2003-01.org.linux-iscsi.c1701.x8664:sn.5b791971cd78
(non-flash)

Putting host to maintenance:
the disks are still there:
lsscsi
[0:0:0:0]    disk    ATA      ST3500630NS      K     /dev/sda
[11:0:0:0]   disk    LIO-ORG  c1701iser        4.0   /dev/sdb
[11:0:0:1]   disk    LIO-ORG  c1701iser32k     4.0   /dev/sdc

activating deactivating the host does not change situation.
I dont see any attempt of vdsm to logout the disks. I can see in the
vdsmd.logs that "[storage.Mount] unmounting /rhev/data-center/mnt/......"
unmounting the nfs part but nothing from [storage.ISCSI]



On Thu, Feb 16, 2017 at 4:25 PM, Nir Soffer <nsoffer at redhat.com> wrote:

> On Thu, Feb 16, 2017 at 5:13 PM, Arman Khalatyan <arm2arm at gmail.com>
> wrote:
> > Hi,
> > In ovirt 4.1 when I put the host into maintenance mode then the nfs
> mounts
> > are unmounted as expected.
> > but the hosts are still logged into the targets.
> >
> > Is it expected behavior?? If yes what is  the use of it?
>
> No, if ovirt connected to the target, it should disconnect from the target.
>
> Maybe you connected manually to the target before that?
>
> A good test to verify this would be to do this in maintenance mode:
>
>     iscsiadm -m node -o delete
>
> Then activate and deactivate the host several times, and check that
> no iscsi session are active when host enter maintenance.
>
> > Another thing concerning to the permanently removed direct LUNs.
> > They are still in the /var/lib/iscsi/nodes and
> /var/lib/iscsi/send_targets/*
> > Would be good to cleanup the folders if users are removing permanently
> the
> > LUNs.
>
> We don't manage the LUNs - if you are removing the LUNs manually, and
> the target providing this LUNs is not needed any more, you are responsible
> for removing the nodes from iscsi database.
>
> I don't think we are removing nodes and targets from a host, only updating
> them when you connect to a server. We also don't have a way to remove
> a target from engine database, so engine cannot ask vdsm to remove targets.
>
> Nir
>
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