packer v0.6.1 doesn't work with libvirt

[ghost]

$ packer build --only=freepto-libvirt new.json                                                            
freepto-libvirt output will be in this color.

==> freepto-libvirt: Downloading or copying ISO
    freepto-libvirt: Downloading or copying: http://cdimage.debian.org/debian-cd/7.4.0/amd64/iso-cd/debian-7.4.0-amd64-CD-1.iso
==> freepto-libvirt: Creating hard drive...
==> freepto-libvirt: Starting HTTP server on port 8081
==> freepto-libvirt: Found port for SSH: 3213.
==> freepto-libvirt: Looking for available port between 5900 and 6000
==> freepto-libvirt: Found available VNC port: 5947
==> freepto-libvirt: Starting VM, booting from CD-ROM
==> freepto-libvirt: Overriding defaults Qemu arguments with QemuArgs...
==> freepto-libvirt: Error launching VM: Qemu failed to start. Please run with logs to get more info.
==> freepto-libvirt: Deleting output directory...
Build 'freepto-libvirt' errored: Build was halted.

==> Some builds didn't complete successfully and had errors:
--> freepto-libvirt: Build was halted.

==> Builds finished but no artifacts were created.

[ghost]

Enable packer debug:

$ export PACKER_LOG="yes" && packer build --debug --only=freepto-libvirt freepto.json

the new qemu version doesn't accept "m" inside the sizing option.
have a look at the following output of a default configuration (i have removed all qmeu args from freepto.json)

2014/08/31 13:25:25 /usr/local/bin/packer-builder-qemu: 2014/08/31 13:25:25 Qemu Builder has no floppy files, not attaching a floppy.
2014/08/31 13:25:25 /usr/local/bin/packer-builder-qemu: 2014/08/31 13:25:25 Executing /usr/bin/qemu-system-x86_64: []string{"-device", "virtio-net,netdev=user.0", "-cdrom", "/home/vinc3nt/Documents/devops/freepto-vagrant/packer/packer_cache/9b973d9d535bc8038ac017b921fca63e1dff4237c09f6f424bb25f21de0d38d1.iso", "-drive", "file=output-freepto-libvirt/freepto-dev.qcow2,if=virtio", "-redir", "tcp:3213::22", "-vnc", "0.0.0.0:47", "-machine", "type=pc-1.0,accel=kvm", "-display", "sdl", "-name", "freepto-dev", "-netdev", "user,id=user.0", "-boot", "once=d", "-m", "512m"}
2014/08/31 13:25:25 /usr/local/bin/packer-builder-qemu: 2014/08/31 13:25:25 Started Qemu. Pid: 18568
2014/08/31 13:25:25 /usr/local/bin/packer-builder-qemu: 2014/08/31 13:25:25 Qemu stderr: qemu-system-x86_64: -m 512m: Parameter 'size' expects a size
==> freepto-libvirt: Error launching VM: Qemu failed to start. Please run with logs to get more info.
2014/08/31 13:25:25 ui error: ==> freepto-libvirt: Error launching VM: Qemu failed to start. Please run with logs to get more info.
==> freepto-libvirt: Pausing before cleanup of step 'stepConfigureVNC'. Press enter to continue. 2014/08/31 13:25:25 ui: ask: ==> freepto-libvirt: Pausing before cleanup of step 'stepConfigureVNC'. Press enter to continue.

fixed with the following commit: vvicaretti@a33b6a5

[mhdali]

Thanks @vinc3nt

[ghost]

I think the issue is actually needing a capital M on 512M option for qemu
(I know this is an old thread, but the first I found on this matter)