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&gt; 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&gt; wrote: >> >> On Thu, Feb 16, 2017 at 5:13 PM, Arman Khalatyan <arm2arm(a)gmail.com&gt; >> 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 > >