1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
|
#!@python@/bin/python
import json
import os
import subprocess
import re
import sys
from sys import stderr
from humanize import naturalsize
from tempfile import TemporaryDirectory
from datetime import (datetime, timedelta)
from dateutil.tz import (tzlocal, tzutc)
import dateutil.parser
import argparse
from tqdm import tqdm
from xdg import xdg_runtime_dir
import pathlib
import unshare
from pyprctl import cap_permitted, cap_inheritable, cap_effective, cap_ambient, Cap
from pwd import getpwnam
import signal
from time import sleep
from halo import Halo
from collections import deque
parser = argparse.ArgumentParser()
parser.add_argument('source', metavar='REPO_OR_ARCHIVE')
parser.add_argument('target', metavar='REPO_OR_ARCHIVE')
args = parser.parse_args()
halo_args = {
'stream': stderr,
'enabled': stderr.isatty(),
'spinner': 'arc'
}
borg_pwd = getpwnam('borg')
def as_borg(caps=set(), cwd=None):
if caps:
cap_permitted.add(*caps)
cap_inheritable.add(*caps)
cap_effective.add(*caps)
cap_ambient.add(*caps)
os.setgid(borg_pwd.pw_gid)
os.setuid(borg_pwd.pw_uid)
if cwd is not None:
os.chdir(cwd)
def read_repo(path):
with Halo(text=f'Listing {path}', **halo_args) as sp:
res = None
with subprocess.Popen(['borg', 'list', '--info', '--lock-wait=600', '--json', path], stdout=subprocess.PIPE, preexec_fn=lambda: as_borg()) as proc:
res = json.load(proc.stdout)['archives']
if sp.enabled:
sp.succeed(f'{len(res)} archives in {path}')
else:
print(f'{len(res)} archives in {path}', file=stderr)
return res
class ToSync:
to_sync = deque()
def __iter__(self):
return self
def __next__(self):
if self.to_sync:
return self.to_sync.popleft()
while True:
try:
src = read_repo(args.source)
dst = read_repo(args.target)
except (subprocess.CalledProcessError, json.decoder.JSONDecodeError) as err:
print(err, file=stderr)
continue
self.to_sync.extend([entry for entry in src if entry['name'] not in {dst_entry['name'] for dst_entry in dst} and not entry['name'].endswith('.checkpoint')])
if self.to_sync:
return self.to_sync.popleft()
raise StopIteration
def copy_archive(src_repo_path, dst_repo_path, entry):
cache_suffix = None
with Halo(text=f'Determine archive parameters', **halo_args) as sp:
match = re.compile('^(.*)-[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.(checkpoint|recreate)(\.[0-9]+)?)?').fullmatch(entry['name'])
if match:
repo_id = None
with subprocess.Popen(['borg', 'info', '--info', '--lock-wait=600', '--json', src_repo_path], stdout=subprocess.PIPE, preexec_fn=lambda: as_borg()) as proc:
repo_id = json.load(proc.stdout)['repository']['id']
if repo_id:
cache_suffix = f'{repo_id}_{match.group(1)}'
if sp.enabled:
sp.succeed(f'Will process {entry["name"]} ({dateutil.parser.isoparse(entry["start"])}, cache_suffix={cache_suffix})')
else:
print(f'Will process {entry["name"]} ({dateutil.parser.isoparse(entry["start"])}, cache_suffix={cache_suffix})', file=stderr)
with TemporaryDirectory(prefix=f'borg-mount_{entry["name"]}_', dir=os.environ.get('RUNTIME_DIRECTORY')) as tmpdir:
child = os.fork()
if child == 0:
# print('unshare/chroot', file=stderr)
unshare.unshare(unshare.CLONE_NEWNS)
subprocess.run(['mount', '--make-rprivate', '/'], check=True)
chroot = pathlib.Path(tmpdir) / 'chroot'
upper = pathlib.Path(tmpdir) / 'upper'
work = pathlib.Path(tmpdir) / 'work'
for path in [chroot,upper,work]:
path.mkdir()
subprocess.run(['mount', '-t', 'overlay', 'overlay', '-o', f'lowerdir=/,upperdir={upper},workdir={work}', chroot], check=True)
bindMounts = ['nix', 'run', 'run/secrets.d', 'run/wrappers', 'proc', 'dev', 'sys', pathlib.Path(os.path.expanduser('~')).relative_to('/')]
if os.environ.get('BORG_BASE_DIR'):
bindMounts.append(pathlib.Path(os.environ['BORG_BASE_DIR']).relative_to('/'))
if not ":" in src_repo_path:
bindMounts.append(pathlib.Path(src_repo_path).relative_to('/'))
if 'SSH_AUTH_SOCK' in os.environ:
bindMounts.append(pathlib.Path(os.environ['SSH_AUTH_SOCK']).parent.relative_to('/'))
for bindMount in bindMounts:
(chroot / bindMount).mkdir(parents=True,exist_ok=True)
# print(*['mount', '--bind', pathlib.Path('/') / bindMount, chroot / bindMount], file=stderr)
subprocess.run(['mount', '--bind', pathlib.Path('/') / bindMount, chroot / bindMount], check=True)
os.chroot(chroot)
os.chdir('/')
try:
os.unlink('/etc/fuse.conf')
except FileNotFoundError:
pass
pathlib.Path('/etc/fuse.conf').parent.mkdir(parents=True,exist_ok=True)
with open('/etc/fuse.conf', 'w') as fuse_conf:
fuse_conf.write('user_allow_other\nmount_max = 1000\n')
dir = pathlib.Path('/borg')
dir.mkdir(parents=True,exist_ok=True,mode=0o0750)
os.chown(dir, borg_pwd.pw_uid, borg_pwd.pw_gid)
total_size = None
total_files = None
if stderr.isatty():
with Halo(text=f'Determine size', **halo_args) as sp:
with subprocess.Popen(['borg', 'info', '--info', '--json', '--lock-wait=600', f'{src_repo_path}::{entry["name"]}'], stdout=subprocess.PIPE, text=True, preexec_fn=lambda: as_borg()) as proc:
stats = json.load(proc.stdout)['archives'][0]['stats']
total_size = stats['original_size']
total_files = stats['nfiles']
if sp.enabled:
sp.succeed(f'{total_files} files, {naturalsize(total_size, binary=True)}')
else:
print(f'{total_files} files, {naturalsize(total_size, binary=True)}', file=stderr)
# print(f'Mounting to {dir}', file=stderr)
with subprocess.Popen(['borg', 'mount', '-o', 'allow_other,ignore_permissions', '--foreground', '--progress', '--lock-wait=600', f'{src_repo_path}::{entry["name"]}', dir], preexec_fn=lambda: as_borg()) as mount_proc:
with Halo(text='Waiting for mount', **halo_args) as sp:
wait_start = datetime.now()
while True:
if os.path.ismount(dir):
break
elif datetime.now() - wait_start > timedelta(minutes=15):
ret.check_returncode()
sleep(0.1)
if sp.enabled:
sp.succeed('Mounted')
else:
print('Mounted', file=stderr)
while True:
try:
with tqdm(total=total_size, unit_scale=True, unit_divisor=1024, unit='B', smoothing=0.01, disable=None, dynamic_ncols=True, maxinterval=0.5, miniters=1) as progress:
seen = 0
env = os.environ.copy()
create_args = ['borg',
'create',
'--lock-wait=600',
'--one-file-system',
'--compression=auto,zstd,10',
'--chunker-params=10,23,16,4095',
'--files-cache=ctime,size',
'--show-rc',
# '--remote-ratelimit=20480',
'--log-json',
'--progress',
'--list',
'--filter=AMEi-x?',
'--stats'
]
archive_time = datetime.strptime(entry["time"], "%Y-%m-%dT%H:%M:%S.%f").replace(tzinfo=tzlocal()).astimezone(tzutc())
create_args += [f'--timestamp={archive_time.strftime("%Y-%m-%dT%H:%M:%S")}']
if cache_suffix:
env['BORG_FILES_CACHE_SUFFIX'] = cache_suffix
else:
create_args += ['--files-cache=disabled']
create_args += [f'{dst_repo_path}::{entry["name"]}', '.']
with subprocess.Popen(create_args, stdin=subprocess.DEVNULL, stderr=subprocess.PIPE, text=True, env=env, preexec_fn=lambda: as_borg(caps={Cap.DAC_READ_SEARCH}, cwd=dir)) as proc:
last_list = None
last_list_time = None
for line in proc.stderr:
try:
json_line = json.loads(line)
except json.decoder.JSONDecodeError:
tqdm.write(line)
continue
t = ''
if 'time' in json_line and stderr.isatty():
ts = datetime.fromtimestamp(json_line['time']).replace(tzinfo=tzlocal())
t = f'{ts.isoformat(timespec="minutes")} '
if json_line['type'] == 'archive_progress':
if last_list_time is None or ((datetime.now() - last_list_time) // timedelta(seconds=3)) % 2 == 1:
if 'path' in json_line and json_line['path']:
progress.set_description(f'… {json_line["path"]}', refresh=False)
else:
progress.set_description(None, refresh=False)
elif last_list is not None:
progress.set_description(last_list, refresh=False)
nfiles=json_line["nfiles"]
if total_files is not None:
nfiles=f'{json_line["nfiles"]}/{total_files}'
progress.set_postfix(compressed=naturalsize(json_line['compressed_size'], binary=True), deduplicated=naturalsize(json_line['deduplicated_size'], binary=True), nfiles=nfiles, refresh=False)
progress.update(json_line["original_size"] - seen)
seen = json_line["original_size"]
elif json_line['type'] == 'file_status':
# tqdm.write(t + f'{json_line["status"]} {json_line["path"]}')
last_list = f'{json_line["status"]} {json_line["path"]}'
last_list_time = datetime.now()
progress.set_description(last_list, refresh=False)
if not stderr.isatty():
print(last_list, file=stderr)
elif (json_line['type'] == 'log_message' or json_line['type'] == 'progress_message' or json_line['type'] == 'progress_percent') and ('message' in json_line or 'msgid' in json_line):
if 'message' in json_line:
tqdm.write(t + json_line['message'])
elif 'msgid' in json_line:
tqdm.write(t + json_line['msgid'])
else:
tqdm.write(t + line)
progress.set_description(None)
if proc.wait() != 0:
continue
except subprocess.CalledProcessError as err:
print(err, file=stderr)
continue
else:
break
mount_proc.terminate()
os._exit(0)
else:
while True:
waitpid, waitret = os.wait()
if waitret != 0:
sys.exit(waitret)
if waitpid == child:
break
def sigterm(signum, frame):
raise SystemExit(128 + signum)
def main():
signal.signal(signal.SIGTERM, sigterm)
if "::" in args.source:
(src_repo_path, _, src_archive) = args.source.partition("::")
entry = None
for candidate_entry in read_repo(src_repo_path):
if entry['name'] != src_archive:
continue
entry = candidate_entry
break
if entry is None:
print("Did not find archive", file=stderr)
os.exit(1)
copy_archive(src_repo_path, args.target, entry)
else:
for entry in ToSync():
copy_archive(args.source, args.target, entry)
if __name__ == "__main__":
sys.exit(main())
|
