Hi, Is someone using iscsi multipath in Ubuntu 16 / Mitaka? Things that work OK for us in Ubuntu 14 / Icehouse seem to be broken.
Basically, the WWID of the volume is not automatically placed in /etc/multipath/wwids, and if we add it manually, we can attach with multipath, but the detach never cleans up iscsi sessions nor device mapper multipath maps. (using multipath-tools 0.5.0+git1.656f8865-5ubuntu2.1, and only one path for testing purposes) - first attach, gives "can't get udev device" error -> https://bugs.launchpad.net/os-brick/+bug/1585940 Failed to execute command multipath -l /dev/disk/by-path/ip-10.167.15.101:3260-iscsi-iqn.1992-08. com.netapp:sn.1873815289-lun-0 root@dev-e01-host07:~# multipath -l /dev/disk/by-path/ip-10.167. 15.101:3260-iscsi-iqn.1992-08.com.netapp:sn.1873815289-lun-0 Aug 12 15:38:30 | ip-10.167.15.101:3260-iscsi-iqn.1992-08.com.netapp:sn.1873815289-lun-0: can't get udev device - once patched, we get a non-multipath attach: in nova-compute.log we see "couldn't find a valid multipath device path for <id>" issuing "multipath -v3", we get "wwid <id> not in wwids file, skipping <device>" root@dev-e01-host07:~# multipath -v3 Aug 12 15:39:47 | libdevmapper version 1.02.110 (2015-10-30) Aug 12 15:39:47 | DM multipath kernel driver v1.11.0 Aug 12 15:39:47 | sdb: prio = ontap controller setting) Aug 12 15:39:47 | sdb: prio args = "" controller setting) Aug 12 15:39:47 | sdb: ontap prio = 2 ... ... Aug 12 15:39:47 | dm-0: blacklisted, udev property missing ===== paths list ===== uuid hcil dev dev_t pri dm_st chk_st vend/prod 360a9800041763061792b492f4e564179 3:0:0:0 sdb 8:16 2 undef faulty NETAPP,LU *Aug 12 15:39:47 | wwid 360a9800041763061792b492f4e564179 not in wwids file, skipping sdb* Aug 12 15:39:47 | sdb: orphan path, only one path Aug 12 15:39:47 | ontap prioritizer refcount 1 Aug 12 15:39:47 | tur checker refcount 1 - if we manually add the WWID to /etc/multipath/wwids, the attach is done with multipath: root@dev-e01-host07:~# virsh domblklist 10 Target Source ------------------------------------------------ vda /var/lib/nova/instances/8440e7a8-92d9-448d-ac17-5f04f032849c/disk vdb /dev/disk/by-id/dm-uuid-mpath-360a9800041763061792b492f4e564230 root@dev-e01-host07:~# multipath -ll 360a9800041763061792b492f4e564230 dm-1 NETAPP,LUN size=1.0G features='2 queue_if_no_path retain_attached_hw_handler' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=2 status=active `- 3:0:0:0 sdb 8:16 active ready running - but the detach operation doesn't remove the multipath map and doesn't logout of iscsi sessions [1]+ Done nova volume-detach 8440e7a8-92d9-448d-ac17-5f04f032849c 2f717d41-894d-472a-851c-aaa03b593364 root@dev-e01-host07:~# multipath -ll 360a9800041763061792b492f4e564230 dm-1 ##,## size=1.0G features='2 queue_if_no_path retain_attached_hw_handler' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=0 status=enabled `- #:#:#:# sdb 8:16 failed undef running root@dev-e01-host07:~# iscsiadm -m session tcp: [2] 10.167.15.101:3260,2000 iqn.1992-08.com.netapp:sn.1873815289 (non-flash) in nova-compute.log, we see "Couldn't find multipath device /dev/mapper/360a9800041763061792b492f4e564230" instance: 8440e7a8-92d9-448d-ac17-5f04f032849c] Detach volume 951264a3-19d9-4f7e-8bbb-a2eabdcae044 from mountpoint /dev/vdb -] Generated XML ('<disk type="block" device="disk">\n <driver name="qemu" type="raw" cache="none" io="native"/>\n <source dev="/dev/disk/by-id/dm-uuid-mpath-360a9 -] Waiting for function nova.virt.libvirt.guest._do_wait_and_retry_detach to return. func /usr/lib/python2.7/dist-packages/oslo_service/loopingcall.py:384 83 - - -] calling os-brick to detach iSCSI Volume disconnect_volume /usr/lib/python2.7/dist-packages/nova/virt/libvirt/volume/iscsi.py:95 - -] Lock "connect_volume" acquired by "os_brick.initiator.connector.disconnect_volume" :: waited 0.000s inner /usr/lib/python2.7/dist-packages/oslo_concurrency/lock 3 - - -] Running cmd (subprocess): sudo nova-rootwrap /etc/nova/rootwrap.conf multipath -r execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processutils.py:3 3 - - -] CMD "sudo nova-rootwrap /etc/nova/rootwrap.conf multipath -r" returned: 0 in 0.167s execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processutils.py - - -] multipath ['-r']: stdout=reload: 360a9800041763061792b492f4e564230 undef NETAPP,LUN#012size=1.0G features='1 queue_if_no_path' hwhandler='0' wp=undef#012`-+- 3 - - -] Running cmd (subprocess): sudo nova-rootwrap /etc/nova/rootwrap.conf multipath -ll /dev/sdb execute /usr/lib/python2.7/dist-packages/oslo_concurrency/process 3 - - -] CMD "sudo nova-rootwrap /etc/nova/rootwrap.conf multipath -ll /dev/sdb" returned: 0 in 0.191s execute /usr/lib/python2.7/dist-packages/oslo_concurrency/proce - - -] multipath ['-ll', u'/dev/sdb']: stdout=360a9800041763061792b492f4e564230 dm-1 NETAPP,LUN#012size=1.0G features='2 queue_if_no_path retain_attached_hw_handler' - - -] remove multipath device /dev/sdb remove_multipath_device /usr/lib/python2.7/dist-packages/os_brick/initiator/linuxscsi.py:123 3 - - -] Running cmd (subprocess): sudo nova-rootwrap /etc/nova/rootwrap.conf multipath -l /dev/sdb execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processu 3 - - -] CMD "sudo nova-rootwrap /etc/nova/rootwrap.conf multipath -l /dev/sdb" returned: 0 in 0.156s execute /usr/lib/python2.7/dist-packages/oslo_concurrency/proces 83 - - -] Couldn't find multipath device /dev/mapper/360a9800041763061792b492f4e564230 - - -] Disconnect multipath device /dev/mapper/360a9800041763061792b492f4e564230 _disconnect_volume_multipath_iscsi /usr/lib/python2.7/dist-packages/os_brick/initiat 3 - - -] Running cmd (subprocess): sudo nova-rootwrap /etc/nova/rootwrap.conf multipath -ll execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processutils.py: 3 - - -] CMD "sudo nova-rootwrap /etc/nova/rootwrap.conf multipath -ll" returned: 0 in 0.158s execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processutils.p - - -] multipath ['-ll']: stdout=360a9800041763061792b492f4e564230 dm-1 NETAPP,LUN#012size=1.0G features='2 queue_if_no_path retain_attached_hw_handler' hwhandler='0 3 - - -] Running cmd (subprocess): sudo nova-rootwrap /etc/nova/rootwrap.conf iscsiadm -m discovery -t sendtargets -p 10.167.15.101:3260 execute /usr/lib/python2.7/di 3 - - -] CMD "sudo nova-rootwrap /etc/nova/rootwrap.conf iscsiadm -m discovery -t sendtargets -p 10.167.15.101:3260" returned: 0 in 0.168s execute /usr/lib/python2.7/ - - -] iscsiadm ['-m', 'discovery', '-t', 'sendtargets', '-p', u'10.167.15.101:3260']: stdout=10.167.15.101:3260,2000 iqn.1992-08.com.netapp:sn.1873815289#012 stderr 3 - - -] Running cmd (subprocess): sudo nova-rootwrap /etc/nova/rootwrap.conf multipath -r execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processutils.py:3 3 - - -] CMD "sudo nova-rootwrap /etc/nova/rootwrap.conf multipath -r" returned: 0 in 0.165s execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processutils.py - - -] multipath ['-r']: stdout=reload: 360a9800041763061792b492f4e564230 undef NETAPP,LUN#012size=1.0G features='1 queue_if_no_path' hwhandler='0' wp=undef#012`-+- - -] Lock "connect_volume" released by "os_brick.initiator.connector.disconnect_volume" :: held 1.022s inner /usr/lib/python2.7/dist-packages/oslo_concurrency/lockut 83 - - -] Disconnected iSCSI Volume vdb disconnect_volume /usr/lib/python2.7/dist-packages/nova/virt/libvirt/volume/iscsi.py:101 3 - - -] Running cmd (subprocess): sudo nova-rootwrap /etc/nova/rootwrap.conf cat /etc/iscsi/initiatorname.iscsi execute /usr/lib/python2.7/dist-packages/oslo_concurr 3 - - -] CMD "sudo nova-rootwrap /etc/nova/rootwrap.conf cat /etc/iscsi/initiatorname.iscsi" returned: 0 in 0.186s execute /usr/lib/python2.7/dist-packages/oslo_concu 3 - - -] Running cmd (subprocess): sudo nova-rootwrap /etc/nova/rootwrap.conf systool -c fc_host -v execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processu 3 - - -] CMD "sudo nova-rootwrap /etc/nova/rootwrap.conf systool -c fc_host -v" returned: 96 in 0.140s execute /usr/lib/python2.7/dist-packages/oslo_concurrency/proce 3 - - -] u'sudo nova-rootwrap /etc/nova/rootwrap.conf systool -c fc_host -v' failed. Not Retrying. execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processut - - -] systool is not installed 3 - - -] Running cmd (subprocess): sudo nova-rootwrap /etc/nova/rootwrap.conf systool -c fc_host -v execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processu Any idea of what could be happening? Thanks
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