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