[Openstack] Cinder volume teardown bug (maybe in TGTD?)

David Hill david.hill at ubisoft.com
Sat Nov 2 01:15:47 UTC 2013


Hi guys,

                Some times when we delete volumes, I've noticed that tgtd seems to keep a lock on the LVM.
I've been able to force delete the target from tgtd but I still cannot delete the logical volume.  Seems
like a bug in tgtd.  Did you ever experience this behavior?

Thank you,

Dave

We can see the session was disconnected from the compute (well, maybe not totally but we don't
see it any longer in iscsiadm sessions...
[root at compute05 ~]# iscsiadm -m session
tcp: [21] 10.130.0.11:3260,1 iqn.2010-10.org.openstack:volume-892ef2b5-57b8-4c2e-9e54-050da70418b1

But in tgtd, it's shown as still connected:
[root at cinder01 ~]# tgt-admin -s | less
Target 33: iqn.2010-10.org.openstack:volume-4bd794a3-611c-444f-9ca7-891f0e471b41
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
        I_T nexus: 63
            Initiator: iqn.1994-05.com.redhat:cce2bb2d6ea5
            Connection: 0
                IP Address: 10.1.2.3
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00210000
            SCSI SN: beaf330
            Size: 0 MB, Block size: 1
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: null
            Backing store path: None
            Backing store flags:
        LUN: 1
            Type: disk
            SCSI ID: IET     00210001
            SCSI SN: beaf331
            Size: 107374 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: rdwr
            Backing store path: /dev/cinder-volumes/volume-4bd794a3-611c-444f-9ca7-891f0e471b41
            Backing store flags:
    Account information:
    ACL information:
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