[Bug 588953] [NEW] Unable to add /dev/md0 as storage pool

[Rusty Burchfield]

Public bug reported:

This is the mirror set I want to use as vm storage.
$ ls /dev/md0*
/dev/md0  /dev/md0p1

However, when I try to add it as a storage pool using virt-manager, I receive this error message.
Error creating pool: Could not start storage pool: cannot open volume '/dev/md01': No such file or directory

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/createpool.py", line 433, in _async_pool_create
    poolobj = self._pool.install(create=True, meter=meter, build=build)
  File "/usr/lib/pymodules/python2.6/virtinst/Storage.py", line 791, in install
    build=build)
  File "/usr/lib/pymodules/python2.6/virtinst/Storage.py", line 474, in install
    raise RuntimeError(errmsg)
RuntimeError: Could not start storage pool: cannot open volume '/dev/md01': No such file or directory

I receive this same error even if I reference the mirror device as
/dev/disk/by-uuid/259b1953-86c5-4d98-994e-79bb80491d8d instead of
/dev/md0.

I /am/ able to start the storage pool if I fdisk the mirror and remove
the partition on it.  It is pretty clear that there is something hard-
coded to expect bland partition numbering which is not guaranteed.

This command is a workaround.  However, I don't expect it to persist across reboots (without some /etc/rc.local action) and it is pretty lame. :(
$ sudo ln -s md0p1 /dev/md01

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: New

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Unable to add /dev/md0 as storage pool
https://bugs.launchpad.net/bugs/588953
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