Re: [ovirt-users] iscsi or iser targets are not detached from the host in the maintenance mode
On Thu, Feb 16, 2017 at 5:55 PM, Arman Khalatyan <arm2arm(a)gmail.com> wrote:
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]
Sounds like a bug in target discovery flow. We add nodes and sessions and
do not clean them.
Would you file a bug?
Nir
On Thu, Feb 16, 2017 at 4:25 PM, Nir Soffer <nsoffer(a)redhat.com> wrote:
>
> On Thu, Feb 16, 2017 at 5:13 PM, Arman Khalatyan <arm2arm(a)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