if 'kernel_id' in self.properties:
self.kernel_id = self.properties['kernel_id']
if 'ramdisk_id' in self.properties:
self.ramdisk_id = self.properties['ramdisk_id']
if 'kernel_id' in self.properties:
self.kernel_id = self.properties['kernel_id']
if 'ramdisk_id' in self.properties:
self.ramdisk_id = self.properties['ramdisk_id']