[Bug 303882] [NEW] python-vm-builder --raw doesn't set size correctly

[Tom]

Public bug reported:

Binary package hint: python-vm-builder

When using the --raw option with an LVM volume as the target to create a
VM, the default size is 5G. This isn't a problem if rootsize + swapsize
+ optsize falls within 5GB, but if you exceed the 5GB default size,
vmbuilder throws an exception (shown below).  To make this concrete here
is what I am trying to do.  I create a logical volume with size 10GB,
and on this I would like to have an 8GB root and 2GB swap partition.
There should be enough space, but I'm being told otherwise.  There
should be a way to specify the size of the raw device, or simply ignore
the size when raw is being used.   I can work up a patch to add a size
option to the command line if it would help.

vmbuilder kvm ubuntu --debug --verbose -c vmbuilder.cfg --raw /dev/tungsten/tungsten-client0 --hostname tungsten-client0 --rootsize 7168 --swapsize 2048 --mem 3072 --overwrite
Traceback (most recent call last):
  File "/usr/bin/vmbuilder", line 29, in <module>
    VMBuilder.run()
  File "/usr/lib/python2.5/site-packages/VMBuilder/__init__.py", line 66, in run
    frontend.run()
  File "/usr/lib/python2.5/site-packages/VMBuilder/plugins/cli/__init__.py", line 65, in run
    self.set_disk_layout(vm)
  File "/usr/lib/python2.5/site-packages/VMBuilder/plugins/cli/__init__.py", line 97, in set_disk_layout
    disk.add_part(offset, vm.swapsize, 'swap', 'swap')
  File "/usr/lib/python2.5/site-packages/VMBuilder/disk.py", line 163, in add_part
    raise Exception('Partition is out of bounds. start=%d, end=%d, disksize=%d' % (begin,end,self.size))
Exception: Partition is out of bounds. start=7168, end=9215, disksize=5120
root at tungsten:~# vmbuilder kvm ubuntu --debug --verbose -c vmbuilder.cfg --raw /dev/tungsten/tungsten-client0 --hostname tungsten-client0 --rootsize 8192 --swapsize 2048 --mem 3072 --overwrite
Traceback (most recent call last):
  File "/usr/bin/vmbuilder", line 29, in <module>
    VMBuilder.run()
  File "/usr/lib/python2.5/site-packages/VMBuilder/__init__.py", line 66, in run
    frontend.run()
  File "/usr/lib/python2.5/site-packages/VMBuilder/plugins/cli/__init__.py", line 65, in run
    self.set_disk_layout(vm)
  File "/usr/lib/python2.5/site-packages/VMBuilder/plugins/cli/__init__.py", line 97, in set_disk_layout
    disk.add_part(offset, vm.swapsize, 'swap', 'swap')
  File "/usr/lib/python2.5/site-packages/VMBuilder/disk.py", line 163, in add_part
    raise Exception('Partition is out of bounds. start=%d, end=%d, disksize=%d' % (begin,end,self.size))
Exception: Partition is out of bounds. start=8192, end=10239, disksize=5120

Output of lsb_release -rd:
Description:	Ubuntu 8.10
Release:	8.10

Output of apt-cache policy python-vm-builder:
apt-cache policy python-vm-builder
python-vm-builder:
  Installed: 0.9-0ubuntu3.1
  Candidate: 0.9-0ubuntu3.1
  Version table:
 *** 0.9-0ubuntu3.1 0
        500 http://us.archive.ubuntu.com intrepid-updates/universe Packages
        500 http://security.ubuntu.com intrepid-security/universe Packages
        100 /var/lib/dpkg/status
     0.9-0ubuntu3 0
        500 http://us.archive.ubuntu.com intrepid/universe Packages

Expected outcome: VM successfully created on the LVM partition that was previously allocated.
Actual outcome: Exception thrown due to an incorrect assumption about the size of the raw device.

** Affects: vm-builder (Ubuntu)
     Importance: Undecided
         Status: New

-- 
python-vm-builder --raw doesn't set size correctly
https://bugs.launchpad.net/bugs/303882
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