122 lines
5.2 KiB
Python
122 lines
5.2 KiB
Python
"""仅在 47 服务器备份并升级 Smail，保留双库和失败证据。"""
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import argparse
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import hashlib
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import json
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import os
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from pathlib import Path
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import shutil
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import sqlite3
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import subprocess
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import time
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ROOT = Path('/opt/smail')
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STAGING = Path('/var/tmp/smail-review-20260917')
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DATABASES = ('smail.db', 'smail-state.db')
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def run(*args):
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return subprocess.check_output(args, text=True).strip()
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def digest(path):
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with path.open('rb') as stream:
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return hashlib.file_digest(stream, 'sha256').hexdigest()
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def snapshot(source, target):
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with sqlite3.connect(f'file:{source}?mode=ro', uri=True) as original:
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with sqlite3.connect(target) as copied:
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original.backup(copied)
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assert copied.execute('PRAGMA integrity_check').fetchone()[0] == 'ok'
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target.chmod(0o600)
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def wait_ready():
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for _ in range(60):
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result = subprocess.run([
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'curl', '--silent', '--fail', '--max-time', '2', '--noproxy', '*',
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'--cacert', str(ROOT / 'ssl/custom.crt'), '--resolve',
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'mail.solit.cn:443:127.0.0.1', 'https://mail.solit.cn/api/ping',
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], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
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if result.returncode == 0 and run('systemctl', 'is-active', 'smail.service') == 'active':
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return
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time.sleep(1)
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raise RuntimeError('升级后服务未就绪')
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument('--main-sha', required=True)
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parser.add_argument('--admin-sha', required=True)
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args = parser.parse_args()
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os.umask(0o077)
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assert os.geteuid() == 0 and ROOT.resolve() == ROOT and not ROOT.is_symlink()
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assert run('hostname') == 'ikun2'
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assert '172.31.134.42/20' in run('ip', '-4', 'address', 'show')
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assert run('systemctl', 'show', 'smail.service', '--property=User', '--value') == 'smail'
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assert run('systemctl', 'is-active', 'smail.service') == 'active'
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expected = {'smail': args.main_sha, 'smail-admin': args.admin_sha}
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for name, checksum in expected.items():
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path = STAGING / name
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with path.open('rb') as binary:
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header = binary.read(20)
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assert header[:5] == b'\x7fELF\x02' and header[18:20] == b'\x3e\x00'
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assert digest(path) == checksum
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assert not (ROOT / name).is_symlink()
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backup = Path('/var/backups') / time.strftime('smail-before-outbox-%Y%m%d-%H%M%S')
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backup.mkdir(mode=0o700)
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installed = False
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subprocess.run(['systemctl', 'stop', 'smail.service'], check=True)
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try:
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# 停服归档包含配置、密钥和日志，仅保存在远程受保护目录。
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archive = backup / 'smail.tar.gz'
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subprocess.run(['tar', '-czf', str(archive), '-C', '/opt', 'smail'], check=True)
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subprocess.run(['tar', '-dzf', str(archive), '-C', '/opt'], check=True)
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archive.chmod(0o600)
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for name in DATABASES:
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source = ROOT / 'data' / name
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assert source.resolve() == source and not source.is_symlink()
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snapshot(source, backup / name)
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for name in expected:
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shutil.copy2(ROOT / name, backup / name)
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installed = True
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for name, checksum in expected.items():
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subprocess.run(['install', '-m', '0755', '-o', 'root', '-g', 'root',
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str(STAGING / name), str(ROOT / name)], check=True)
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assert digest(ROOT / name) == checksum
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subprocess.run(['systemctl', 'start', 'smail.service'], check=True)
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wait_ready()
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for name in DATABASES:
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with sqlite3.connect(f'file:{ROOT / "data" / name}?mode=ro', uri=True) as database:
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assert database.execute('PRAGMA integrity_check').fetchone()[0] == 'ok'
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with sqlite3.connect(f'file:{ROOT / "data/smail.db"}?mode=ro', uri=True) as database:
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version = database.execute('SELECT MAX(version) FROM schema_migration').fetchone()[0]
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assert version == 23
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states = dict(database.execute('SELECT state,COUNT(*) FROM outbound_delivery GROUP BY state'))
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result = {'backup': str(backup), 'archive_sha256': digest(archive),
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'artifacts': expected, 'migration': version, 'queue_states': states,
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'service': run('systemctl', 'is-active', 'smail.service'),
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'admin_version': run(str(ROOT / 'smail-admin'), 'version'),
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'database_integrity': 'ok', 'database_reset': False}
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(backup / 'result.json').write_text(json.dumps(result, ensure_ascii=False, indent=2), encoding='utf-8')
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print(json.dumps(result, ensure_ascii=False, indent=2))
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except BaseException:
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if installed:
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subprocess.run(['systemctl', 'stop', 'smail.service'], check=True)
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for name in DATABASES:
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snapshot(ROOT / 'data' / name, backup / ('failed-' + name))
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snapshot(backup / name, ROOT / 'data' / name)
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shutil.chown(ROOT / 'data' / name, user='smail', group='smail')
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for name in expected:
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shutil.copy2(backup / name, ROOT / name)
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subprocess.run(['systemctl', 'start', 'smail.service'], check=True)
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print('升级失败，备份及故障证据保留于：' + str(backup))
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raise
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if __name__ == '__main__':
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main()
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