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Initial ZFS clones support

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This commit is contained in:
Phil Krylov
2021-06-22 19:09:31 +03:00
committed by Phil Krylov
parent 07cb7cfad4
commit e11c332808
3 changed files with 55 additions and 26 deletions
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47
zfs_autobackup/ZfsNode.py
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@ -1,5 +1,6 @@
# python 2 compatibility
from __future__ import print_function
from operator import attrgetter
import re
import shlex
import subprocess
@ -219,15 +220,15 @@ class ZfsNode(ExecuteNode):
def selected_datasets(self, property_name, exclude_received, exclude_paths, exclude_unchanged, min_change):
"""determine filesystems that should be backed up by looking at the special autobackup-property, systemwide
returns: list of ZfsDataset
returns: list of ZfsDataset sorted by creation time
"""
self.debug("Getting selected datasets")
# get all source filesystems that have the backup property
lines = self.run(tab_split=True, readonly=True, cmd=[
"zfs", "get", "-t", "volume,filesystem", "-o", "name,value,source", "-H",
property_name
"zfs", "get", "-t", "volume,filesystem", "-Hp",
"{},creation".format(property_name)
])
# The returnlist of selected ZfsDataset's:
@ -237,23 +238,27 @@ class ZfsNode(ExecuteNode):
sources = {}
for line in lines:
(name, value, raw_source) = line
dataset = ZfsDataset(self, name)
(name, prop_name, value, raw_source) = line
if prop_name == property_name:
dataset = ZfsDataset(self, name)
# "resolve" inherited sources
sources[name] = raw_source
if raw_source.find("inherited from ") == 0:
inherited = True
inherited_from = re.sub("^inherited from ", "", raw_source)
source = sources[inherited_from]
else:
inherited = False
source = raw_source
# "resolve" inherited sources
sources[name] = raw_source
if raw_source.find("inherited from ") == 0:
inherited = True
inherited_from = re.sub("^inherited from ", "", raw_source)
source = sources[inherited_from]
else:
inherited = False
source = raw_source
# determine it
if dataset.is_selected(value=value, source=source, inherited=inherited, exclude_received=exclude_received,
exclude_paths=exclude_paths, exclude_unchanged=exclude_unchanged,
min_change=min_change):
selected_filesystems.append(dataset)
return selected_filesystems
# determine it
if dataset.is_selected(value=value, source=source, inherited=inherited, exclude_received=exclude_received,
exclude_paths=exclude_paths, exclude_unchanged=exclude_unchanged,
min_change=min_change):
selected_filesystems.append(dataset)
elif prop_name == "creation":
# creation date for the last dataset
if selected_filesystems and selected_filesystems[-1].name == name:
selected_filesystems[-1].creation = int(value)
return sorted(selected_filesystems, key=attrgetter("creation"))