65 lines
1.7 KiB
Python
65 lines
1.7 KiB
Python
from dataclasses import dataclass
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from time import time
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import libvirt
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from lxml.builder import E
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from lxml.etree import tostring
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@dataclass
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class VolumeInfo:
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name: str
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path: str
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capacity: int
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def to_xml(self) -> str:
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unixtime = str(int(time()))
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xml = E.volume(type='file')
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xml.append(E.name(self.name))
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xml.append(E.key(self.path))
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xml.append(E.source())
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xml.append(E.capacity(str(self.capacity * 1024 * 1024), unit='bytes'))
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xml.append(E.allocation('0'))
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xml.append(E.target(
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E.path(self.path),
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E.format(type='qcow2'),
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E.timestamps(
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E.atime(unixtime),
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E.mtime(unixtime),
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E.ctime(unixtime)),
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E.compat('1.1'),
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E.features(E.lazy_refcounts())
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))
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return tostring(xml, encoding='unicode', pretty_print=True)
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class Volume:
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def __init__(self, pool: libvirt.virStoragePool,
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vol: libvirt.virStorageVol):
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self.pool = pool
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self.vol = vol
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@property
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def name(self) -> str:
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return self.vol.name()
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@property
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def path(self) -> str:
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return self.vol.path()
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def dump_xml(self) -> str:
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return self.vol.XMLDesc()
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def clone(self, vol_info: VolumeInfo) -> None:
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self.pool.createXMLFrom(
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vol_info.to_xml(),
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self.vol,
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flags=libvirt.VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA)
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def resize(self, capacity: int):
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"""Resize volume to `capacity`. Unit is mebibyte."""
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self.vol.resize(capacity * 1024 * 1024)
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def delete(self) -> None:
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self.vol.delete()
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