vmbuilder fails when specifying numeric values in config file

[Jarl]

Binary package hint: python-vm-builder

When using a config file containing
[DEFAULT]
rootsize = 10000
swapsize = 4000

The vmbuilder script fails with

Traceback (most recent call last):
  File "/usr/bin/vmbuilder", line 29, in <module>
    VMBuilder.run()
  File "/usr/lib/python2.6/dist-packages/VMBuilder/__init__.py", line 66, in run
    frontend.run()
  File "/usr/lib/python2.6/dist-packages/VMBuilder/plugins/cli/__init__.py", line 65, in run
    self.set_disk_layout(vm)
  File "/usr/lib/python2.6/dist-packages/VMBuilder/plugins/cli/__init__.py", line 92, in set_disk_layout
    size = vm.rootsize + vm.swapsize + vm.optsize
TypeError: cannot concatenate 'str' and 'int' objects

Of course the natural workaround is to use part = <partitionfile>, in stead of specifying rootsize and swapsize.

Jarl

[Jarl (jarl-dk)]

Even worse, much much worse; If the configuration file contains (for specifying 2GB ram)
mem = 2000

the vmbuilder script will not fail, it will silently create an XML file containing
  <memory>18446744073709551615</memory>
  <currentMemory>18446744073709551615</currentMemory>

This will in turn make 'virsh start ubuntu' hang and top will show a libvirtd using 100% of CPU.

Jarl

[Chuck Short (zulcss)]

Hi,

Thanks for the bug report. What happens when you wrap the values in quotes?

Thanks
chuck

[Jarl (jarl-dk)]

I have now used a configuration file containing a line like this (with single quotes):

mem='2000'

and created a machine like this

vmbuilder kvm ubuntu --debug -c vmbuilder_pegasus.conf --hostname ubu-test

while having the memory number in quotes it failed to create the machine.

I attach the output of the above command

[Chuck Short (zulcss)]

Thanks for the bug report.

Regards
chuck

[Doka (doka-wepoca)]

Any dependency to this bug?

https://bugs.launchpad.net/ubuntu/+source/vm-builder/+bug/303882