def purge_old_snapshots(self, interval, keep):
old_snapshots = self.get_old_snapshots(int(keep), interval)
if old_snapshots != []:
log.info("purging old snapshots: %s" %
(' '.join([str(s) for s in old_snapshots])))
for s in old_snapshots:
s.destroy()
def clean_zero_size_snapshots(self, interval_name):
#all_snapshots = self.get_snapshots()
for d in self.get_datasets():
d_snapshots = self.filter_snapshots(dataset=d, interval=interval_name)[:-1]
for s in d_snapshots:
if s.size == "0":
log.info("destroying zero-sized snapshot: %s" % s)
s.destroy()
def destroy_snapshot(self, name):
"""callout to zfs command to destroy snapshot"""
# name = "%s@%s" % (filesystem, interval)
if env.DRY_RUN:
log.info("dry-run: would destroy %s" % name)
else:
log.debug("destroy_snapshot(%s)" % (name))
if "@" in name:
zfs_cmd.destroy(name)
else:
log.error("should not be destroying a dataset! name: %s" % name)
def destroy_snapshot(self, name):
"""callout to btrfs command to destroy snapshot"""
if env.DRY_RUN:
log.info("dry-run: would destroy %s" % name)
else:
log.debug("destroy_snapshot(%s)" % (name))
if os.access(name, os.F_OK):
if "/.btrfs-auto-snap/" in name:
btrfs_cmd.subvolume.delete(name)
else:
log.error("should not be destroying a dataset! name: %s" % name)
else:
log.error("cannot find %s" % name)
def commit_snapshot(self, filesystem, interval, label):
"""call out to zfs command to create snapshot
return a Snapshot object"""
name = "%s@zfs-auto-snap_%s-%s" % (filesystem, interval, label)
current_snapshots = [s.name for s in self.get_snapshots()]
if name in current_snapshots:
log.error("snapshot %s already exists, not overwriting!" % name)
return
if env.DRY_RUN:
log.info("dry-run: would commit %s" % name)
else:
log.debug("commit_snapshot(%s, %s, %s)" % (filesystem, interval, label))
zfs_cmd.snapshot(name)
def commit_snapshot(self, dataset, interval, label):
"""call out to btrfs command to create snapshot
return a Snapshot object"""
snap_dir = os.path.join(dataset, '.btrfs-auto-snap')
interval_dir = os.path.join(snap_dir, interval)
destination = os.path.join(interval_dir, label)
if os.path.exists(destination):
log.error("snapshot %s already exists, not overwriting!" % destination)
return
# if interval_dir isn't a directory, and also isn't a file with that name
# create the snapshot label directory
if not os.path.isdir(interval_dir) and not os.path.exists(interval_dir):
s = os.stat(snap_dir)
os.mkdir(interval_dir)
os.chown(interval_dir, s[stat.ST_UID], s[stat.ST_GID])
if env.DRY_RUN:
log.info("dry-run: would commit %s" % (destination))
else:
log.debug("commit_snapshot(%s, %s, %s)" % (dataset, interval, label))
btrfs_cmd.subvolume.snapshot(dataset, destination)
