iscsi or iser targets are not detached from the host in the maintenance mode
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? 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. Thanks, Arman.
On Thu, Feb 16, 2017 at 5:13 PM, Arman Khalatyan <arm2arm@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
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@redhat.com> wrote:
On Thu, Feb 16, 2017 at 5:13 PM, Arman Khalatyan <arm2arm@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
On Thu, Feb 16, 2017 at 5:55 PM, Arman Khalatyan <arm2arm@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@redhat.com> wrote:
On Thu, Feb 16, 2017 at 5:13 PM, Arman Khalatyan <arm2arm@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
done: https://bugzilla.redhat.com/show_bug.cgi?id=1422959 On Thu, Feb 16, 2017 at 5:00 PM, Nir Soffer <nsoffer@redhat.com> wrote:
The test disks are not attached to any virtual machine. nothing done on
On Thu, Feb 16, 2017 at 5:55 PM, Arman Khalatyan <arm2arm@gmail.com> wrote: 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@redhat.com> wrote:
On Thu, Feb 16, 2017 at 5:13 PM, Arman Khalatyan <arm2arm@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
participants (2)
-
Arman Khalatyan -
Nir Soffer