[Kimchi-devel] [PATCH] bug fix: setup disks to use cache=none to support live migration.

[Daniel H Barboza]

Reviewed-by: Daniel Barboza <danielhb at linux.vnet.ibm.com>

On 03/05/2014 12:51 PM, Paulo Vital wrote:
> When executing a virsh live migration of a VM created by Kimchi, the
> migration stops due to miss configuration "cache=none" on disk's
> performance parameters.
>
> Signed-off-by: Paulo Vital <pvital at linux.vnet.ibm.com>
> ---
>   src/kimchi/vmtemplate.py | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/src/kimchi/vmtemplate.py b/src/kimchi/vmtemplate.py
> index e2d78a4..89b5e72 100644
> --- a/src/kimchi/vmtemplate.py
> +++ b/src/kimchi/vmtemplate.py
> @@ -152,7 +152,7 @@ class VMTemplate(object):
>               params = {'src': src, 'dev': dev, 'bus': self.info['disk_bus']}
>               ret += """
>               <disk type='file' device='disk'>
> -              <driver name='qemu' type='qcow2'/>
> +              <driver name='qemu' type='qcow2' cache='none'/>
>                 <source file='%(src)s' />
>                 <target dev='%(dev)s' bus='%(bus)s' />
>               </disk>
> @@ -182,7 +182,7 @@ class VMTemplate(object):
>           # Passthrough configuration
>           disk_xml = """
>               <disk type='volume' device='lun'>
> -              <driver name='qemu' type='raw'/>
> +              <driver name='qemu' type='raw' cache='none'/>
>                 <source dev='%(src)s'/>
>                 <target dev='%(dev)s' bus='scsi'/>
>               </disk>"""