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[Xavier Queralt <1254007@xxxxxxxxxxxxxxxxxx>]

I've jut checked the log of volume.py module and I couldn't find any
version containing that extra whitespace mentioned in your report. Could
it be that it was introduced by mistake in your local checkout?

See
https://github.com/openstack/nova/blob/master/nova/virt/libvirt/volume.py#L810

** Changed in: nova
       Status: Triaged => Invalid

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https://bugs.launchpad.net/bugs/1254007

Title:
  Error attaching a cinder glousterfs volume with libvirt

Status in OpenStack Compute (Nova):
  Invalid

Bug description:
  I quite investigating it.
  The problem seams to be related to
  nova/virt/libvirt/volume.py
  function _mount_glusterfs
  prepares a command to locally mount a glusterfs volume with this line of code:
  gluster_cmd.extend([glusterfs_share, mount_path, ' '])
  the trailing white spaces causes mount error on my system.

  Using the original code i get:

  2013-11-22 13:32:23.272 6686 TRACE nova.openstack.common.rpc.amqp   File "/usr/lib/python2.6/site-packages/nova/utils.py", line 177, in execute
  2013-11-22 13:32:23.272 6686 TRACE nova.openstack.common.rpc.amqp     return processutils.execute(*cmd, **kwargs)
  2013-11-22 13:32:23.272 6686 TRACE nova.openstack.common.rpc.amqp   File "/usr/lib/python2.6/site-packages/nova/openstack/common/processutils.py", line 178, in execute
  2013-11-22 13:32:23.272 6686 TRACE nova.openstack.common.rpc.amqp     cmd=' '.join(cmd))
  2013-11-22 13:32:23.272 6686 TRACE nova.openstack.common.rpc.amqp ProcessExecutionError: Unexpected error while running command.
  2013-11-22 13:32:23.272 6686 TRACE nova.openstack.common.rpc.amqp Command: sudo nova-rootwrap /etc/nova/rootwrap.conf mount -t glusterfs 10.101.101.120:v_cinder /var/lib/cinder/mnt/8bf7d2294d80777975e85e1905255721
  2013-11-22 13:32:23.272 6686 TRACE nova.openstack.common.rpc.amqp Exit code: 1
  2013-11-22 13:32:23.272 6686 TRACE nova.openstack.common.rpc.amqp Stdout: ''
  2013-11-22 13:32:23.272 6686 TRACE nova.openstack.common.rpc.amqp Stderr: "Usage: mount -V                 : print version\n       mount -h                 : print this help\n       mount                    : list mounted filesystems\n       mount -l                 : idem, including volume labels\nSo far the informational part. Next the mounting.\nThe command is `mount [-t fstype] something somewhere'.\nDetails found in /etc/fstab may be omitted.\n       mount -a [-t|-O] ...     : mount all stuff from /etc/fstab\n       mount device             : mount device at the known place\n       mount directory          : mount known device here\n       mount -t type dev dir    : ordinary mount command\nNote that one does not really mount a device, one mounts\na filesystem (of the given type) found on the device.\nOne can also mount an already visible directory tree elsewhere:\n       mount --bind olddir newdir\nor move a subtree:\n       mount --move olddir newdir\nOne can change the type of mount containing the directory dir:\n       mount --make-shared dir\n       mount --make-slave dir\n       mount --make-private dir\n       mount --make-unbindable dir\nOne can change the type of all the mounts in a mount subtree\ncontaining the directory dir:\n       mount --make-rshared dir\n       mount --make-rslave dir\n       mount --make-rprivate dir\n       mount --make-runbindable dir\nA device can be given by name, say /dev/hda1 or /dev/cdrom,\nor by label, using  -L label  or by uuid, using  -U uuid .\nOther options: [-nfFrsvw] [-o options] [-p passwdfd].\nFor many more details, say  man 8 mount .\n"
  2013-11-22 13:32:23.272 6686 TRACE nova.openstack.common.rpc.amqp

  
  Simply replacing this line
  gluster_cmd.extend([glusterfs_share, mount_path, ' '])
  with this
  gluster_cmd.extend([glusterfs_share, mount_path])
  it works correctly and it mount and attach my cinder glouster volume

  I don't understand why a trailing space can cause this kind of
  problem.

  I'm using havana vanilla distribution on CENTOS 6.4

  ciao

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