** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => juno-rc1

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https://bugs.launchpad.net/bugs/1308649

Title:
  Attaching Nova volumes fails if open-iscsi daemon is not already
  running

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  nova-compute traces on first volume attach if open-iscsi is not
  running:

  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481] Traceback (most recent call last):
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/compute/manager.py", line 4142, in 
_attach_volume
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     do_check_attach=False, 
do_driver_attach=True)
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/virt/block_device.py", line 44, in 
wrapped
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     ret_val = method(obj, context, *args, 
**kwargs)
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/virt/block_device.py", line 248, in 
attach
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     connector)
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/openstack/common/excutils.py", line 
68, in __exit__
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     six.reraise(self.type_, self.value, 
self.tb)
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/virt/block_device.py", line 239, in 
attach
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     device_type=self['device_type'], 
encryption=encryption)
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/virt/libvirt/driver.py", line 1224, in 
attach_volume
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     disk_info)
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/virt/libvirt/driver.py", line 1183, in 
volume_driver_method
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     return method(connection_info, *args, 
**kwargs)
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/openstack/common/lockutils.py", line 
249, in inner
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     return f(*args, **kwargs)
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/contextlib.py", line 34, in __exit__
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     self.gen.throw(type, value, traceback)
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/openstack/common/lockutils.py", line 
212, in lock
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     yield sem
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/openstack/common/lockutils.py", line 
249, in inner
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     return f(*args, **kwargs)
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]   File 
"/usr/lib64/python2.6/site-packages/nova/virt/libvirt/volume.py", line 285, in 
connect_volume
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481]     for ip, iqn in 
self._get_target_portals_from_iscsiadm_output(out):
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481] ValueError: too many values to unpack
  2014-04-16 13:19:44.359 6079 TRACE nova.compute.manager [instance: 
ddc07867-67a9-4af7-b7d0-d75dff53b481] 


  
  Thats because it runs "iscsiadm -m discovery -t sendtargets -p", which prints 
upon first run:

  Loading iscsi modules:                                                        
                           done
  Starting iSCSI initiator service:                                             
                           done
  Setting up iSCSI targets:                                                     
                           unused
  192.168.204.82:3260,1 
iqn.2010-10.org.openstack:volume-f9b12623-6ce3-4dac-a71f-09ad4249bdd3
  192.168.204.82:3260,1 
iqn.2010-10.org.openstack:volume-f9b12623-6ce3-4dac-a71f-09ad4249bdd3

  
  aka there is some garbage before the actual output that it looks for. this is 
due to /etc/iscsid.conf having configured to start the daemon: 

  from /etc/iscsid.conf:

  # Default for upstream open-iscsi scripts (uncomment to activate).
  iscsid.startup = /usr/sbin/rcopen-iscsi start

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