def load_volume(data, bootloader): """Instantiates a volume that corresponds to the data in the manifest :param dict data: The 'volume' section from the manifest :param str bootloader: Name of the bootloader the system will boot with :return: The volume that represents all information pertaining to the volume we bootstrap on. :rtype: Volume """ # Map valid partition maps in the manifest and their corresponding classes from partitionmaps.gpt import GPTPartitionMap from partitionmaps.msdos import MSDOSPartitionMap from partitionmaps.none import NoPartitions partition_map = {'none': NoPartitions, 'gpt': GPTPartitionMap, 'msdos': MSDOSPartitionMap, }.get(data['partitions']['type']) # Map valid volume backings in the manifest and their corresponding classes from bootstrapvz.common.fs.loopbackvolume import LoopbackVolume from bootstrapvz.providers.ec2.ebsvolume import EBSVolume from bootstrapvz.common.fs.virtualdiskimage import VirtualDiskImage from bootstrapvz.common.fs.virtualharddisk import VirtualHardDisk from bootstrapvz.common.fs.virtualmachinedisk import VirtualMachineDisk from bootstrapvz.common.fs.folder import Folder volume_backing = {'raw': LoopbackVolume, 's3': LoopbackVolume, 'vdi': VirtualDiskImage, 'vhd': VirtualHardDisk, 'vmdk': VirtualMachineDisk, 'ebs': EBSVolume, 'folder': Folder }.get(data['backing']) # Instantiate the partition map from bootstrapvz.common.bytes import Bytes # Only operate with a physical sector size of 512 bytes for now, # not sure if we can change that for some of the virtual disks sector_size = Bytes('512B') partition_map = partition_map(data['partitions'], sector_size, bootloader) # Create the volume with the partition map as an argument return volume_backing(partition_map)