Cinder+LIO: Live migration failed.

[Ainur Shakirov]

If uses cinder with LIO live migration in Nova failed.

I have three nodes: c0, c1 and c2.

Steps to reproduce:
1. Create a VM with boot from disk to one host (c0) or attach disk into VM.
2. Migrate this VM to another node (c1). Live migration is OK.
3. Again migrate a VM to host c0 -> error "iscsiadm: No session found" in the nova-compute log.
4. Migrate VM to node c2. Live migration is OK. Migration to c0 and c1 from c2 -> again "No session found".

Version of software (for all compute nodes):
Ubuntu 14.04.1 (up-to-date)
OpenStack Icehouse 2014.1.2 (with patch from https://bugs.launchpad.net/cinder/+bug/1361738)
Hypervisor: QEMU/KVM
iSCSI-target: LIO (LVM-based)

nova-compute log with error in the attachments.

Thank you for your answers!

WBR.
Ainur.

P.S. Please sorry for my English.

[Ainur Shakirov (ainur-shakirov-tt)]

Added: cinder-volume.log

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/130399

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/130399
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=641a44eb17a8de53e54f09a2dc339129d41c529f
Submitter: Jenkins
Branch: master

commit 641a44eb17a8de53e54f09a2dc339129d41c529f
Author: Tomoki Sekiyama <email address hidden>
Date: Wed Oct 22 18:30:06 2014 -0400

    LioAdm: Delete initiator from targets on terminate_connection

    In current LioAdm implementation, initiators are remained even if
    terminate_connection is called. This keeps volumes exported to hosts
    after instances attaching the volumes are live-migrated to another
    host, which is not good for security. It also causes an error on the
    migration back to the original host, because cinder-rtstool doesn't
    update CHAP authentication if the initiator already exists.

    With this patch, initiators are deleted on terminate_conection.
    'initiator-delete' operation is added to cinder-rtstool.
    It makes the following live-migration succeed.
    Also, this adds unit tests for initialize_connection and
    terminate_connection methods in LioAdm.

    Change-Id: Ib273f0ba4f1ef553374c0433b049f18719f8c758
    Closes-Bug: #1369541

[Ainur Shakirov (ainur-shakirov-tt)]

Thank you very much! I will test LM with LIO with this patch in this weekend.