def get_config(self):
"""load com.sun:auto-snapshot settings
for all zfs filesystems"""
raw_config = zfs_cmd.get("-o", "name,property,value", "-t", "filesystem", "all")
p = re.compile(".* com.sun:auto-snapshot.*")
subst = re.compile("com.sun:")
config = {}
for i in p.findall(raw_config.stdout):
s = i.split()
if len(s) == 3:
name = s[0]
prop = subst.sub("", s[1])
if s[2] == "true":
value = True
elif s[2] == "false":
value = False
else:
log.error(
"improper value for com.sun:auto-snapshot property, assuming false: %s %s %s"
% (name, prop, value)
)
value = False
if name in config.keys():
config[name][prop] = value
else:
config[name] = {prop: value}
return config
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)
from fnmatch import filter
from tardis import log
from tardis.fs import Filesystem
mod_files = filter(os.listdir(os.path.dirname(__file__)), "*.py")
mod_files.remove('__init__.py')
names = [f[:-3] for f in mod_files]
loaded_modules = {}
for mod_name in names:
fd, pathname, description = imp.find_module(mod_name, __path__)
try:
module = imp.load_module("%s.%s" % (__name__, mod_name),
fd, pathname, description)
loaded_modules[mod_name] = module
except:
log.error("Error importing %s" % mod_name)
raise
finally:
fd.close()
if not loaded_modules:
raise Exception("ERROR: no filesystems enabled!")
def load_plugins():
"""Loads filesystem plugins. Returns a list of instances"""
return {p.__module__.split('.')[-1]: p()
for p in Filesystem.__subclasses__() if p.is_enabled()}
