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[James Page <james.page@xxxxxxxxxx>]

This bug was fixed in the package python-os-brick - 1.6.1-0ubuntu1.2~cloud0
---------------

 python-os-brick (1.6.1-0ubuntu1.2~cloud0) xenial-newton; urgency=medium
 .
   * New update for the Ubuntu Cloud Archive.
 .
 python-os-brick (1.6.1-0ubuntu1.2) yakkety; urgency=medium
 .
   * d/p/stop-calling-multipath-r-when-attaching-detaching-iS.patch
    Backport fix for stopping calling 'multipath -r' (LP: #1623700)


** Changed in: cloud-archive/newton
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1623700

Title:
  [SRU] multipath iscsi does not logout of sessions on xenial

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive mitaka series:
  Fix Released
Status in Ubuntu Cloud Archive newton series:
  Fix Released
Status in os-brick:
  Fix Released
Status in python-os-brick package in Ubuntu:
  Fix Released
Status in python-os-brick source package in Xenial:
  Fix Released
Status in python-os-brick source package in Yakkety:
  Fix Released

Bug description:
  [Impact]

   * multipath-tools has a bug that 'multipath -r' can cause
  /dev/mapper/<wwid> to be deleted and re-created momentarily (bug
  #1621340 is used to track this problem), thus os.stat(mdev) right
  after _rescan_multipath ('multipath -r') in os-brick can fail if it is
  executed before multipath dev being re-created. This will also lead to
  multipath iscsi does not logout of sessions on xenial.

  [Test Case]

   * Enable cinder multipath by adding iscsi_ip_address and iscsi_secondary_ip_addresses in cinder.conf
   * Enable nova multipath by adding iscsi_use_multipath=True in [libvirt] secion of nova.conf
   * Detach a iSCSI volume
   * Check that devices/symlinks do not get messed up mentioned below, or check that multipath device /dev/mapper/<wwid> doesn't be deleted and re-created momentarily

  [Regression Potential]

   * multipath-tools loads devices on its own, we shouldn't need to be
  forcing multipathd to do reload, so there is no regression potential.

  stack@xenial-devstack-master-master-20160914-092014:~$ sudo iscsiadm -m session
  tcp: [5] 10.0.1.10:3260,1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873 (non-flash)
  tcp: [6] 10.0.5.10:3260,1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873 (non-flash)
  tcp: [7] 10.0.1.11:3260,1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873 (non-flash)
  tcp: [8] 10.0.5.11:3260,1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873 (non-flash)

  stack@xenial-devstack-master-master-20160914-092014:~$ sudo iscsiadm -m node
  10.0.1.11:3260,-1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873
  10.0.5.11:3260,-1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873
  10.0.5.10:3260,-1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873
  10.0.1.10:3260,-1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873

  stack@xenial-devstack-master-master-20160914-092014:~$ sudo tail -f /var/log/syslog
  Sep 14 22:33:14 xenial-qemu-tester multipath: dm-0: failed to get udev uid: Invalid argument
  Sep 14 22:33:14 xenial-qemu-tester multipath: dm-0: failed to get sysfs uid: Invalid argument
  Sep 14 22:33:14 xenial-qemu-tester multipath: dm-0: failed to get sgio uid: No such file or directory
  Sep 14 22:33:14 xenial-qemu-tester systemd[1347]: dev-disk-by\x2did-scsi\x2d3624a93709a738ed78583fd12003fb774.device: Dev dev-disk-by\x2did-scsi\x2d3624a93709a738ed78583fd12003fb774.device appeared twice with different sysfs paths /sys/devices/platform/host6/session5/target6:0:0/6:0:0:1/block/sda and /sys/devices/virtual/block/dm-0
  Sep 14 22:33:14 xenial-qemu-tester systemd[1347]: dev-disk-by\x2did-wwn\x2d0x624a93709a738ed78583fd12003fb774.device: Dev dev-disk-by\x2did-wwn\x2d0x624a93709a738ed78583fd12003fb774.device appeared twice with different sysfs paths /sys/devices/platform/host6/session5/target6:0:0/6:0:0:1/block/sda and /sys/devices/virtual/block/dm-0
  Sep 14 22:33:14 xenial-qemu-tester systemd[1]: dev-disk-by\x2did-scsi\x2d3624a93709a738ed78583fd12003fb774.device: Dev dev-disk-by\x2did-scsi\x2d3624a93709a738ed78583fd12003fb774.device appeared twice with different sysfs paths /sys/devices/platform/host6/session5/target6:0:0/6:0:0:1/block/sda and /sys/devices/virtual/block/dm-0
  Sep 14 22:33:14 xenial-qemu-tester systemd[1]: dev-disk-by\x2did-wwn\x2d0x624a93709a738ed78583fd12003fb774.device: Dev dev-disk-by\x2did-wwn\x2d0x624a93709a738ed78583fd12003fb774.device appeared twice with different sysfs paths /sys/devices/platform/host6/session5/target6:0:0/6:0:0:1/block/sda and /sys/devices/virtual/block/dm-0
  Sep 14 22:33:14 xenial-qemu-tester kernel: [22362.163521] audit: type=1400 audit(1473892394.556:21): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-6e1017a7-6dea-418f-ad9b-879da085bd13" pid=32665 comm="apparmor_parser"
  Sep 14 22:33:14 xenial-qemu-tester kernel: [22362.173614] audit: type=1400 audit(1473892394.568:22): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-6e1017a7-6dea-418f-ad9b-879da085bd13//qemu_bridge_helper" pid=32665 comm="apparmor_parser"
  Sep 14 22:33:14 xenial-qemu-tester iscsid: Connection8:0 to [target: iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873, portal: 10.0.5.11,3260] through [iface: default] is operational now

  stack@xenial-devstack-master-master-20160914-092014:~$ nova volume-
  detach 6e1017a7-6dea-418f-ad9b-879da085bd13 d1d68e04-a217-44ea-
  bb74-65e0de73e5f8

  stack@xenial-devstack-master-master-20160914-092014:~$ sudo iscsiadm -m session
  tcp: [5] 10.0.1.10:3260,1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873 (non-flash)
  tcp: [6] 10.0.5.10:3260,1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873 (non-flash)
  tcp: [7] 10.0.1.11:3260,1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873 (non-flash)
  tcp: [8] 10.0.5.11:3260,1 iqn.2010-06.com.purestorage:flasharray.3adbe40b49bac873 (non-flash)

  stack@xenial-devstack-master-master-20160914-092014:~$ sudo tail -f /var/log/syslog
  Sep 14 22:48:10 xenial-qemu-tester kernel: [23257.736455] connection6:0: detected conn error (1020)
  Sep 14 22:48:13 xenial-qemu-tester kernel: [23260.742036] connection5:0: detected conn error (1020)
  Sep 14 22:48:13 xenial-qemu-tester kernel: [23260.742066] connection7:0: detected conn error (1020)
  Sep 14 22:48:13 xenial-qemu-tester kernel: [23260.742139] connection8:0: detected conn error (1020)
  Sep 14 22:48:13 xenial-qemu-tester kernel: [23260.742156] connection6:0: detected conn error (1020)
  Sep 14 22:48:16 xenial-qemu-tester kernel: [23263.747638] connection5:0: detected conn error (1020)
  Sep 14 22:48:16 xenial-qemu-tester kernel: [23263.747666] connection7:0: detected conn error (1020)
  Sep 14 22:48:16 xenial-qemu-tester kernel: [23263.747710] connection8:0: detected conn error (1020)
  Sep 14 22:48:16 xenial-qemu-tester kernel: [23263.747737] connection6:0: detected conn error (1020)
  Sep 14 22:48:16 xenial-qemu-tester iscsid: message repeated 67 times: [ conn 0 login rejected: initiator failed authorization with target]
  Sep 14 22:48:19 xenial-qemu-tester kernel: [23266.753999] connection6:0: detected conn error (1020)
  Sep 14 22:48:19 xenial-qemu-tester kernel: [23266.754019] connection8:0: detected conn error (1020)
  Sep 14 22:48:19 xenial-qemu-tester kernel: [23266.754105] connection5:0: detected conn error (1020)
  Sep 14 22:48:19 xenial-qemu-tester kernel: [23266.754146] connection7:0: detected conn error (1020)

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