GEY95AD4

1#!/usr/bin/env python3
2
3import os
4import os.path
5import glob
6import datetime
7import shutil
8import time
9import sys
10import subprocess
11
12from b2sdk.v2 import (
13        B2Api,
14        InMemoryAccountInfo,
15        Synchronizer,
16        NewerFileSyncMode,
17        KeepOrDeleteMode,
18        SyncReport,
19)
20from b2sdk.sync.folder import LocalFolder, B2Folder
21
22BUCKET="..."
23KEY_ID="..."
24KEY="..."
25
26current = sorted(list(map(lambda f: os.path.basename(f), glob.glob("/snapshots/*"))))
27last = os.path.basename(sorted(list(glob.glob("/snapshots/*")))[-1])
28now = datetime.datetime.utcnow()
29suffix = last.split("_")[0]
30new = f"{now.year}-{now.month:02}-{now.day:02}-{now.hour:02}:{now.minute:02}_{suffix}"
31
32# `.` prefix to ensure atomicity of snapshot encoding and keep them sorted first
33subprocess.run(
34        f"btrfs subvolume snapshot -r / /snapshots/.{new}",
35        shell=True,
36        check=True,
37)
38
39snap_name = f"{new}.snapshot.zst.aes256"
40subprocess.run(
41        f"btrfs send -p /snapshots/{last} /snapshots/.{new} | zstd --adapt -T0 | openssl enc -aes-256-cbc -pbkdf2 -pass file:/root/backup/password > /tmp/{snap_name}",
42        shell=True,
43        check=True,
44)
45
46# mv does not sometimes discard metadata, unlike pythonic ways to move files
47subprocess.run(
48        f"mv /tmp/{snap_name} /home/janis/torrents/snapshots/",
49        shell=True,
50        check=True,
51)
52subprocess.run(
53        f"mv /snapshots/.{new} /snapshots/{new}",
54        shell=True,
55        check=True,
56)
57
58api = B2Api(InMemoryAccountInfo())
59api.authorize_account("production", KEY_ID, KEY)
60s = Synchronizer(
61        max_workers=8,
62        newer_file_mode=NewerFileSyncMode.REPLACE,
63        keep_days_or_delete=KeepOrDeleteMode.DELETE,
64)
65s.sync_folders(
66        LocalFolder("/home/janis/torrents/snapshots/"),
67        B2Folder(BUCKET, "", api),
68        int(round(time.time() * 1000)),
69        SyncReport(sys.stdout, True),
70)
71