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[Launchpad Bug Tracker <1541702@xxxxxxxxxxxxxxxxxx>]

[Expired for OpenStack Compute (nova) because there has been no activity
for 60 days.]

** Changed in: nova
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1541702

Title:
  Unable to see the attached cinder volume in instance

Status in OpenStack Compute (nova):
  Expired

Bug description:
   I have successfully installed OpenStack kilo + XenServer 6.5. I have added a Cinder service it seems to be working because I can connect to my horizon (also by command line) and create volumes and attach them to my instances. Instance name in OpenStack is aaa and it's name in XenServer is instance-0000011e. This is a print screen from my horizon:
  |-------------------------------------------------------------------------------------------------------------------------------
  | Name              Size   Status   Attached To                               Availability Zone
  | xen_volume2  1GB   In-Use   Attached to aaa on /dev/xvdb   demo
  |-------------------------------------------------------------------------------------------------------------------------------
   
        Taking a look on XenCenter connected to my XenServer, seems like the ISCSI mapping is
   
  working fine, this is a print screen:
  |----------------------------------------------------------------------------------------------------------------------------
  |Position Name                       Description  SR 
  |0            instance-0000011e  root             Local storage on xenserver2
  |1                                                                        tempSR-b76853a3-86f2-4f0a-b78e-eaa4c883172a
  |----------------------------------------------------------------------------------------------------------------------------
   
        The tempSR-b76853a3... is the mmaping of the xen_volume2 to my aaa. This storage's type is VDI-per-LUN iSCSI. According to the cinder mapping information the device is mapped to xvdb, but I cant find this volume (dmesg or fdisk -l doesn't show anything), I have noticed two strange behaviors.
   
  1.  After attach the volume, boot the instance takes a lot of time.

  2.  After attach the volume and after restart it (and wait a lot) the dmesg contains this:
  [ 0.164935] blkfront: xvda: barrier: enabled
  [ 0.179729] xvda: xvda1
  [ 0.184022] Setting capacity to 2097152
  [ 0.184043] xvda: detected capacity change from 0 to 1073741824
  [ 5.260049] XENBUS: Waiting for devices to initialise: 295s...290s...285s...280s...275s...270s...265s...260s...255s...250s...245s...240s...235s...230s...
  225s...220s...215s...210s...205s...200s...195s...190s...185s...180s...175s...170s...165s...160s...
  155s...150s...145s...140s...135s...130s...125s...120s...115s...110s...105s...100s...95s...90s...85s
  ...80s...75s...70s...65s...60s...55s...50s...45s...40s...35s...30s...25s...20s...15s...10s...5s...0s...
   
  If I remove the volume and reboot this is not present.
   
  /var/lib/messages @ XenServer 6.5 shows
  Jul 16 19:32:09 xenserver2 xapi: [info|xenserver2|6599 storage_unix |VDI.activate D:b152d00698ae|storage-access] vbd/4/xvdb sr:OpaqueRef:e47be30a-b987-a1d8-b7b4-903cca36db53 does not support vdi_activate: doing nothing

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