lvm+tgt Volume detach fails on Suse Linux

[ZhangChi]

SUSE Linux / Icehouse / CINDER /LVM TGT iSCSI

I am trying to dettach volume using Icehouse version. The backend model is LVM, tgt and iSCSI.
However, after a long while, the volume keeps in "dettaching" status.
Then I open cinder-volume.log， find exceptions as bellows:

2014-06-20 14:38:22.438 28194 DEBUG cinder.openstack.common.processutils [req-838ec792-58b1-43d8-abfa-91ffc73b9682 be28e258705447bfbeb82bfa40aeafb3 01a37fd860394171b127ac4fd3692cda - - -] Running cmd (subprocess): sudo cinder-rootwrap /etc/cinder/rootwrap.conf tgt-admin --force --delete iqn.2010-10.org.openstack:volume-1f5396df-8bc9-4717-8b41-a18209ef16d3 execute /usr/lib64/python2.6/site-packages/cinder/openstack/common/processutils.py:142
2014-06-20 14:38:22.531 28194 DEBUG cinder.openstack.common.processutils [req-838ec792-58b1-43d8-abfa-91ffc73b9682 be28e258705447bfbeb82bfa40aeafb3 01a37fd860394171b127ac4fd3692cda - - -] Result was 22 execute /usr/lib64/python2.6/site-packages/cinder/openstack/common/processutils.py:167
2014-06-20 14:38:22.532 28194 ERROR cinder.brick.iscsi.iscsi [req-838ec792-58b1-43d8-abfa-91ffc73b9682 be28e258705447bfbeb82bfa40aeafb3 01a37fd860394171b127ac4fd3692cda - - -] Failed to remove iscsi target for volume id:1f5396df-8bc9-4717-8b41-a18209ef16d3: Unexpected error while running command.
Command: sudo cinder-rootwrap /etc/cinder/rootwrap.conf tgt-admin --force --delete iqn.2010-10.org.openstack:volume-1f5396df-8bc9-4717-8b41-a18209ef16d3
Exit code: 22
2014-06-20 14:39:26.580 28194 TRACE cinder.volume.manager Traceback (most recent call last):
2014-06-20 14:39:26.580 28194 TRACE cinder.volume.manager self.driver.remove_export(context.elevated(), volume_ref)
2014-06-20 14:39:26.582 28194 TRACE oslo.messaging.rpc.dispatcher return self._do_dispatch(endpoint, method, ctxt, args)
2014-06-20 14:39:26.582 28194 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib64/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch
2014-06-20 14:39:26.582 28194 TRACE oslo.messaging.rpc.dispatcher result = getattr(endpoint, method)(ctxt, **new_args)
2014-06-20 14:39:26.582 28194 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib64/python2.6/site-packages/cinder/volume/manager.py", line 874, in terminate_connection
2014-06-20 14:39:26.582 28194 TRACE oslo.messaging.rpc.dispatcher raise exception.RemoveExportException(volume=volume_id, reason=ex)
2014-06-20 14:39:26.582 28194 TRACE oslo.messaging.rpc.dispatcher RemoveExportException: Failed to remove export for volume 1f5396df-8bc9-4717-8b41-a18209ef16d3: Failed to remove iscsi target for volume 1f5396df-8bc9-4717-8b41-a18209ef16d3.
2014-06-20 14:39:26.582 28194 TRACE oslo.messaging.rpc.dispatcher

Seems like the problem appears because execute the cmd : sudo cinder-rootwrap /etc/cinder/rootwrap.conf tgt-admin --force --delete iqn.2010-10.org.openstack:volume-1f5396df-8bc9-4717-8b41-a18209ef16d3 return error code 22
and using cmd tgt-admin -s shows:
Target 8: iqn.2010-10.org.openstack:volume-1f5396df-8bc9-4717-8b41-a18209ef16d3
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
        I_T nexus: 9
            Initiator: iqn.1996-04.de.suse:01:c758bf924a8a
            Connection: 0
                IP Address: 10.67.144.60
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET 00080000
            SCSI SN: beaf80
            Size: 0 MB
            Online: Yes
            Removable media: No
            Backing store type: rdwr
            Backing store path: None
        LUN: 1
            Type: disk
            SCSI ID: IET 00080001
            SCSI SN: beaf81
            Size: 1074 MB
            Online: Yes
            Removable media: No
            Backing store type: rdwr
            Backing store path: /dev/cinder-volumes/volume-1f5396df-8bc9-4717-8b41-a18209ef16d3
    Account information:
    ACL information:

and links from compute node still exist and using iscsiadm -m node -T iqn.2010-10.org.openstack:volume-1f5396df-8bc9-4717-8b41-a18209ef16d3 –u seems help resovle this problem.

I am wondering why the problem appears all the time, can anybody help me. Many thanks

[ZhangChi (chzhang8)]

Does somebody met the probem before in SUSE Linux Enterprise Server 11 SP3? tks

[ZhangChi (chzhang8)]

Ok, I find Icehouse dettaching volume all right in Ubuntu.

[Sean McGinnis (sean-mcginnis)]

Closing stale bug. If this is still an issue please reopen.