You can do this before launching:

glance image-update \
    --property hw_disk_bus=scsi \
    --property hw_cdrom_bus=ide \
    --property hw_vif_model=e1000 \
    f16-x86_64-openstack-sda

It's from
http://docs.openstack.org/user-guide/content/cli_manage_images.html

But if you need to change it on runtime you will need to use the libvirt
API because modifiying a running VM is outside the scope of openstack
El 15/12/2014 07:13, "Srinivasreddy R" <[email protected]>
escribió:

> hi,
> I want to add some extra flags[have some ruquirement] at runtime [while
> launching the VM ] as qemu  arguments .
> any suggestions ?
> which files/lib  i need to change .
>
> thanks
> srini
>
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