550 lines
27 KiB
Python
Executable File
550 lines
27 KiB
Python
Executable File
#!/usr/bin/env python3
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# TODO: https://borgbackup.readthedocs.io/en/latest/internals/frontends.html
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# will they EVER release a public API? for now we'll just use subprocess since
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# we import it for various prep stuff anyways.
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import argparse
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import configparser
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import datetime
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import json
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import logging
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import logging.handlers
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import os
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import subprocess
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import sys
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try:
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import pymysql # not stdlib; "python-pymysql" in Arch's AUR
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has_mysql = True
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except ImportError:
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has_mysql = False
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try:
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# https://www.freedesktop.org/software/systemd/python-systemd/journal.html#journalhandler-class
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from systemd import journal
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has_systemd = True
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except ImportError:
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has_systemd = False
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### LOG LEVEL MAPPINGS ###
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loglvls = {'critical': logging.CRITICAL,
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'error': logging.ERROR,
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'warning': logging.WARNING,
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'info': logging.INFO,
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'debug': logging.DEBUG}
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### THE GUTS ###
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class Backup(object):
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def __init__(self, args):
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self.args = args
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### DIRECTORIES ###
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if self.args['oper'] == 'backup':
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for d in (self.args['mysqldir'], self.args['stagedir']):
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os.makedirs(d, exist_ok = True, mode = 0o700)
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### LOGGING ###
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# Thanks to:
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# https://web.archive.org/web/20170726052946/http://www.lexev.org/en/2013/python-logging-every-day/
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# https://stackoverflow.com/a/42604392
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# https://plumberjack.blogspot.com/2010/10/supporting-alternative-formatting.html
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# and user K900_ on r/python for entertaining my very silly question.
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self.logger = logging.getLogger(__name__)
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self.logger.setLevel(loglvls[self.args['loglevel']])
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_logfmt = logging.Formatter(fmt = '{levelname}:{name}: {message} ({asctime}; {filename}:{lineno})',
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style = '{',
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datefmt = '%Y-%m-%d %H:%M:%S')
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_journalfmt = logging.Formatter(fmt = '{levelname}:{name}: {message} ({filename}:{lineno})',
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style = '{',
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datefmt = '%Y-%m-%d %H:%M:%S')
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handlers = []
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if self.args['disklog']:
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os.makedirs(os.path.dirname(self.args['logfile']),
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exist_ok = True,
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mode = 0o700)
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handlers.append(logging.handlers.RotatingFileHandler(self.args['logfile'],
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encoding = 'utf8',
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maxBytes = 100000,
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backupCount = 1))
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if self.args['verbose']:
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handlers.append(logging.StreamHandler())
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if has_systemd:
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h = journal.JournalHandler()
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h.setFormatter(_journalfmt)
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h.setLevel(loglvls[self.args['loglevel']])
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self.logger.addHandler(h)
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for h in handlers:
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h.setFormatter(_logfmt)
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h.setLevel(loglvls[self.args['loglevel']])
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self.logger.addHandler(h)
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self.logger.debug('BEGIN INITIALIZATION')
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### CONFIG ###
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if not os.path.isfile(self.args['cfgfile']):
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self.logger.error('{0} does not exist'.format(self.args['cfgfile']))
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exit(1)
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with open(self.args['cfgfile'], 'r') as f:
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self.cfg = json.loads(f.read())
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### END LOGGING ###
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### ARGS CLEANUP ###
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self.logger.debug('VARS (before args cleanup): {0}'.format(vars()))
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self.args['repo'] = [i.strip() for i in self.args['repo'].split(',')]
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if 'all' in self.args['repo']:
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self.args['repo'] = list(self.cfg['repos'].keys())
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for r in self.args['repo'][:]:
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if r == 'all':
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self.args['repo'].remove(r)
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elif r not in self.cfg['repos'].keys():
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self.logger.warning('Repository {0} is not configured; skipping.'.format(r))
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self.args['repo'].remove(r)
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self.logger.debug('VARS (after args cleanup): {0}'.format(vars()))
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self.logger.debug('END INITIALIZATION')
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### CHECK ENVIRONMENT ###
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# If we're running from cron, we want to print errors to stdout.
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if os.isatty(sys.stdin.fileno()):
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self.cron = False
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else:
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self.cron = True
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### END INIT ###
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def cmdExec(self, cmd, stdoutfh = None):
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self.logger.debug('Running command: {0}'.format(' '.join(cmd)))
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if self.args['dryrun']:
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return() # no-op
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if stdoutfh:
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_cmd = subprocess.run(cmd, stdout = stdoutfh, stderr = subprocess.PIPE)
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else:
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_cmd = subprocess.run(cmd,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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_out = _cmd.stdout.decode('utf-8').strip()
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_err = _cmd.stderr.decode('utf-8').strip()
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_returncode = _cmd.returncode
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if _returncode != 0:
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self.logger.error('STDERR: ({1})\n{0}'.format(_err, ' '.join(cmd)))
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if _err != '' and self.cron:
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self.logger.warning('Command {0} failed: {1}'.format(' '.join(cmd), _err))
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return()
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def createRepo(self):
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_env = os.environ.copy()
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_env['BORG_RSH'] = self.cfg['config']['ctx']
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for r in self.args['repo']:
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self.logger.info('[{0}]: BEGIN INITIALIZATION'.format(r))
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_cmd = ['borg',
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'init',
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'-v',
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'{0}@{1}:{2}'.format(self.cfg['config']['user'],
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self.cfg['config']['host'],
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r)]
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_env['BORG_PASSPHRASE'] = self.cfg['repos'][r]['password']
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# We don't use self.cmdExec() here either because
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# again, custom env, etc.
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self.logger.debug('VARS: {0}'.format(vars()))
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if not self.args['dryrun']:
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_out = subprocess.run(_cmd,
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env = _env,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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_stdout = _out.stdout.decode('utf-8').strip()
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_stderr = _out.stderr.decode('utf-8').strip()
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_returncode = _out.returncode
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self.logger.debug('[{0}]: (RESULT) {1}'.format(r, _stdout))
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# sigh. borg uses stderr for verbose output.
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self.logger.debug('[{0}]: STDERR: ({2})\n{1}'.format(r,
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_stderr,
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' '.join(_cmd)))
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if _returncode != 0:
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self.logger.error('[{0}]: FAILED: {1}'.format(r, ' '.join(_cmd)))
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if _err != '' and self.cron and _returncode != 0:
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self.logger.warning('Command {0} failed: {1}'.format(' '.join(cmd), _err))
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del(_env['BORG_PASSPHRASE'])
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self.logger.info('[{0}]: END INITIALIZATION'.format(r))
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return()
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def create(self):
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_env = os.environ.copy()
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_env['BORG_RSH'] = self.cfg['config']['ctx']
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self.logger.info('START: backup')
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for r in self.args['repo']:
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self.logger.info('[{0}]: BEGIN BACKUP'.format(r))
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if 'prep' in self.cfg['repos'][r].keys():
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for prep in self.cfg['repos'][r]['prep']:
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self.logger.info('[{0}]: Running prepfunc {1}'.format(r, prep))
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eval('self.{0}'.format(prep)) # I KNOW, IT'S TERRIBLE. so sue me.
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self.logger.info('[{0}]: Finished prepfunc {1}'.format(r, prep))
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_cmd = ['borg',
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'create',
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'-v', '--stats',
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'--compression', 'lzma,9']
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if 'excludes' in self.cfg['repos'][r].keys():
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for e in self.cfg['repos'][r]['excludes']:
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_cmd.extend(['--exclude', e])
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_cmd.append('{0}@{1}:{2}::{3}'.format(self.cfg['config']['user'],
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self.cfg['config']['host'],
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r,
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self.args['archive']))
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for p in self.cfg['repos'][r]['paths']:
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_cmd.append(p)
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_env['BORG_PASSPHRASE'] = self.cfg['repos'][r]['password']
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self.logger.debug('VARS: {0}'.format(vars()))
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# We don't use self.cmdExec() here because we want to explicitly pass the env
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# and format the log line differently.
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self.logger.debug('[{0}]: Running command: {1}'.format(r, ' '.join(_cmd)))
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if not self.args['dryrun']:
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_out = subprocess.run(_cmd,
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env = _env,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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_stdout = _out.stdout.decode('utf-8').strip()
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_stderr = _out.stderr.decode('utf-8').strip()
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_returncode = _out.returncode
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self.logger.debug('[{0}]: (RESULT) {1}'.format(r, _stdout))
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self.logger.error('[{0}]: STDERR: ({2})\n{1}'.format(r,
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_stderr,
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' '.join(_cmd)))
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if _returncode != 0:
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self.logger.error('[{0}]: FAILED: {1}'.format(r, ' '.join(_cmd)))
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if _stderr != '' and self.cron and _returncode != 0:
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self.logger.warning('Command {0} failed: {1}'.format(' '.join(_cmd), _stderr))
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del(_env['BORG_PASSPHRASE'])
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self.logger.info('[{0}]: END BACKUP'.format(r))
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self.logger.info('END: backup')
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return()
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def miscBak(self, pkgr):
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self.logger.info('BEGIN: miscBak()')
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_cmd = None
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for p in os.environ['PATH'].split(':'):
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d = os.path.expanduser(p)
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if os.path.isfile(os.path.join(d, pkgr)):
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_pkgr = pkgr
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self.logger.debug('Package tool found at {0}'.format(_pkgr))
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else:
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_pkgr = 'pacman'
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self.logger.debug('Using {0} as package tool'.format(_pkgr))
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with open(os.path.join(self.args['stagedir'], 'pkg.lst'), 'w') as f:
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_cmd = [_pkgr,
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'-Qet',
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'--color',
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'never']
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self.cmdExec(_cmd, stdoutfh = f)
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self.logger.info('END: miscBak()')
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return()
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def mysqlBak(self):
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self.logger.info('BEGIN: mysqlBak()')
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if not has_mysql:
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self.logger.error('You need to install the PyMySQL module to back up MySQL databases. Skipping.')
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return()
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# These are mysqldump options shared by ALL databases
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_mysqlopts = ['--routines',
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'--add-drop-database',
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'--add-drop-table',
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'--allow-keywords',
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'--complete-insert',
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'--create-options',
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'--extended-insert']
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_DBs = []
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_mycnf = os.path.expanduser(os.path.join('~', '.my.cnf'))
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if not os.path.isfile(_mycnf):
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exit('{0}: ERROR: Cannot get credentials for MySQL (cannot find ~/.my.cnf)!')
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_mycfg = configparser.ConfigParser()
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_mycfg._interpolation = configparser.ExtendedInterpolation()
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_mycfg.read(_mycnf)
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_sqlcfg = {s:dict(_mycfg.items(s)) for s in _mycfg.sections()}
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if 'host' not in _sqlcfg.keys():
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_socketpath = '/var/run/mysqld/mysqld.sock' # correct for Arch, YMMV.
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_mysql = pymysql.connect(unix_socket = _socketpath,
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user = _sqlcfg['client']['user'],
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passwd = _sqlcfg['client']['password'])
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else:
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_mysql = pymysql.connect(host = _sqlcfg['client']['host'],
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user = _sqlcfg['client']['user'],
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port = _sqlcfg['client']['port'],
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passwd = _sqlcfg['client']['password'])
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_cur = _mysql.cursor()
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_cur.execute('SHOW DATABASES')
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for row in _cur.fetchall():
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_DBs.append(row[0])
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self.logger.debug('Databases: {0}'.format(', '.join(_DBs)))
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for db in _DBs:
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_cmd = ['mysqldump',
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'--result-file={0}.sql'.format(os.path.join(self.args['mysqldir'], db))]
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# These are database-specific options
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if db in ('information_schema', 'performance_schema'):
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_cmd.append('--skip-lock-tables')
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elif db == 'mysql':
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_cmd.append('--flush-privileges')
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_cmd.extend(_mysqlopts)
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_cmd.append(db)
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self.cmdExec(_cmd)
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self.logger.info('END: mysqlBak()')
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return()
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def listRepos(self):
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print('\n\033[1mCurrently configured repositories are:\033[0m\n')
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print('\t{0}\n'.format(', '.join(self.cfg['repos'].keys())))
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if self.args['verbose']:
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print('\033[1mDETAILS:\033[0m\n')
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for r in self.args['repo']:
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print('\t\033[1m{0}:\033[0m\n\t\t\033[1mPath(s):\033[0m\t'.format(r.upper()), end = '')
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for p in self.cfg['repos'][r]['paths']:
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print(p, end = ' ')
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if 'prep' in self.cfg['repos'][r].keys():
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print('\n\t\t\033[1mPrep:\033[0m\t\t', end = '')
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for p in self.cfg['repos'][r]['prep']:
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print(p, end = ' ')
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if 'excludes' in self.cfg['repos'][r].keys():
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print('\n\t\t\033[1mExclude(s):\033[0m\t', end = '')
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for p in self.cfg['repos'][r]['excludes']:
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print(p, end = ' ')
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print('\n')
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return()
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def printer(self):
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# TODO: better alignment. https://stackoverflow.com/a/5676884
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_results = self.lister()
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if not self.args['archive']: # It's a listing of archives
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print('\033[1mREPO:\tSNAPSHOT:\t\tTIMESTAMP:\033[0m\n')
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for r in _results.keys():
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print(r, end = '')
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for line in _results[r]:
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_snapshot = line.split()
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print('\t{0}\t\t{1}'.format(_snapshot[0], ' '.join(_snapshot[1:])))
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print()
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else: # It's a listing inside an archive
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if self.args['verbose']:
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_fields = ['REPO:', 'PERMS:', 'OWNERSHIP:', 'SIZE:', 'TIMESTAMP:', 'PATH:']
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for r in _results.keys():
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print('\033[1m{0}\t{1}\033[0m'.format(_fields[0], r))
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# https://docs.python.org/3/library/string.html#formatspec
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print('{0[1]:<15}\t{0[2]:<15}\t{0[3]:<15}\t{0[4]:<24}\t{0[5]:<15}'.format(_fields))
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for line in _results[r]:
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_fline = line.split()
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_perms = _fline[0]
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_ownership = '{0}:{1}'.format(_fline[1], _fline[2])
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_size = _fline[3]
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_time = ' '.join(_fline[4:7])
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_path = ' '.join(_fline[7:])
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print('{0:<15}\t{1:<15}\t{2:<15}\t{3:<24}\t{4:<15}'.format(_perms,
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_ownership,
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_size,
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_time,
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_path))
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else:
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print('\033[1mREPO:\tPATH:\033[0m\n')
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for r in _results.keys():
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print(r, end = '')
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for line in _results[r]:
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_fline = line.split()
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print('\t{0}'.format(' '.join(_fline[7:])))
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return()
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def lister(self):
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output = {}
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_env = os.environ.copy()
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self.logger.debug('START: lister')
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_env['BORG_RSH'] = self.cfg['config']['ctx']
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for r in self.args['repo']:
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if self.args['archive']:
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_cmd = ['borg',
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'list',
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'{0}@{1}:{2}::{3}'.format(self.cfg['config']['user'],
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self.cfg['config']['host'],
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r,
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self.args['archive'])]
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else:
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_cmd = ['borg',
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'list',
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'{0}@{1}:{2}'.format(self.cfg['config']['user'],
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self.cfg['config']['host'],
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r)]
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_env['BORG_PASSPHRASE'] = self.cfg['repos'][r]['password']
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if not self.args['dryrun']:
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_out = subprocess.run(_cmd,
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env = _env,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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_stdout = [i.strip() for i in _out.stdout.decode('utf-8').splitlines()]
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_stderr = _out.stderr.decode('utf-8').strip()
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_returncode = _out.returncode
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output[r] = _stdout
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self.logger.debug('[{0}]: (RESULT) {1}'.format(r,
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'\n'.join(_stdout)))
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if _returncode != 0:
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self.logger.error('[{0}]: STDERR: ({2}) ({1})'.format(r,
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_stderr,
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' '.join(_cmd)))
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if _stderr != '' and self.cron and _returncode != 0:
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self.logger.warning('Command {0} failed: {1}'.format(' '.join(cmd), _err))
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del(_env['BORG_PASSPHRASE'])
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if not self.args['archive']:
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if self.args['numlimit'] > 0:
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if self.args['old']:
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output[r] = output[r][:self.args['numlimit']]
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else:
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output[r] = list(reversed(output[r]))[:self.args['numlimit']]
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if self.args['invert']:
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output[r] = reversed(output[r])
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self.logger.debug('END: lister')
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return(output)
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def printMoarHelp():
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_helpstr = ('\n\tNOTE: Sorting only applies to listing archives, NOT the contents!\n\n' +
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'In order to efficiently display results, there are several options to handle it. ' +
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'Namely, these are:\n\n\t\t-s/--sort [direction]\n\t\t-l/--limit [number]\n\t\t-x/--invert\n\n' +
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'For example, if you want to list the 5 most recently *taken* snapshots, you would use:\n\n\t\t-l 5\n\n' +
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'If you would want those SAME results SORTED in the reverse order (i.e. the 5 most recently ' +
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'taken snapshots sorted from newest to oldest), then it would be: \n\n\t\t-l 5 -x\n\n' +
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'Lastly, if you wanted to list the 7 OLDEST TAKEN snapshots in reverse order (that is, ' +
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'sorted from newest to oldest), that\'d be: \n\n\t\t-o -l 7 -x\n')
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print(_helpstr)
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exit(0)
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def parseArgs():
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### DEFAULTS ###
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_date = datetime.datetime.now().strftime("%Y_%m_%d.%H_%M")
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_logfile = '/var/log/borg/{0}'.format(_date)
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_mysqldir = os.path.abspath(os.path.join(os.path.expanduser('~'), '.bak', 'mysql'))
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_stagedir = os.path.abspath(os.path.join(os.path.expanduser('~'), '.bak', 'misc'))
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_cfgfile = os.path.abspath(os.path.join(os.path.expanduser('~'), '.config', 'optools', 'backup.json'))
|
|
_defloglvl = 'info'
|
|
######
|
|
args = argparse.ArgumentParser(description = 'Backups manager',
|
|
epilog = 'TIP: this program has context-specific help. e.g. try "%(prog)s list --help"')
|
|
args.add_argument('-c', '--config',
|
|
dest = 'cfgfile',
|
|
default = _cfgfile,
|
|
help = ('The path to the config file. Default: \033[1m{0}\033[0m'.format(_cfgfile)))
|
|
args.add_argument('-Ll', '--loglevel',
|
|
dest = 'loglevel',
|
|
default = _defloglvl,
|
|
choices = list(loglvls.keys()),
|
|
help = ('The level of logging to perform. \033[1mWARNING:\033[0m \033[1mdebug\033[0m will log ' +
|
|
'VERY sensitive information such as passwords! Default: \033[1m{0}\033[0m'.format(_defloglvl)))
|
|
args.add_argument('-Ld', '--log-to-disk',
|
|
dest = 'disklog',
|
|
action = 'store_true',
|
|
help = ('If specified, log to a specific file (-Lf/--logfile)' +
|
|
' instead of the system logger.'))
|
|
args.add_argument('-Lf', '--logfile',
|
|
dest = 'logfile',
|
|
default = _logfile,
|
|
help = ('The path to the logfile, only used if -Ld/--log-to-disk ' +
|
|
'is specified. Default: \033[1m{0}\033[0m (dynamic)').format(_logfile))
|
|
args.add_argument('-v', '--verbose',
|
|
dest = 'verbose',
|
|
action = 'store_true',
|
|
help = ('If specified, log messages will be printed to STDERR ' +
|
|
'in addition to the other configured log system(s), and verbosity for printing ' +
|
|
'functions is increased. \033[1mWARNING:\033[0m This may display VERY sensitive information ' +
|
|
'such as passwords!'))
|
|
### ARGS FOR ALL OPERATIONS ###
|
|
commonargs = argparse.ArgumentParser(add_help = False)
|
|
commonargs.add_argument('-r', '--repo',
|
|
dest = 'repo',
|
|
default = 'all',
|
|
help = ('The repository to perform the operation for. ' +
|
|
'The default is \033[1mall\033[0m, a special value that specifies all known ' +
|
|
'repositories. Can also accept a comma-separated list.'))
|
|
remoteargs = argparse.ArgumentParser(add_help = False)
|
|
remoteargs.add_argument('-d', '--dry-run',
|
|
dest = 'dryrun',
|
|
action = 'store_true',
|
|
help = ('Act as if we are performing tasks, but none will actually be executed ' +
|
|
'(useful for testing logging)'))
|
|
### OPERATIONS ###
|
|
subparsers = args.add_subparsers(help = 'Operation to perform',
|
|
dest = 'oper')
|
|
backupargs = subparsers.add_parser('backup',
|
|
help = 'Perform a backup.',
|
|
parents = [commonargs, remoteargs])
|
|
listargs = subparsers.add_parser('list',
|
|
help = 'List available backups.',
|
|
parents = [commonargs, remoteargs])
|
|
listrepoargs = subparsers.add_parser('listrepos',
|
|
help = 'List availabile/configured repositories.',
|
|
parents = [commonargs])
|
|
initargs = subparsers.add_parser('init',
|
|
help = 'Initialise a repository.',
|
|
parents = [commonargs, remoteargs])
|
|
### OPERATION-SPECIFIC OPTIONS ###
|
|
# CREATE ("backup") #
|
|
backupargs.add_argument('-a',
|
|
'--archive',
|
|
default = _date,
|
|
dest = 'archive',
|
|
help = ('The name of the archive. Default: \033[1m{0}\033[0m (dynamic)').format(_date))
|
|
backupargs.add_argument('-s',
|
|
'--stagedir',
|
|
default = _stagedir,
|
|
dest = 'stagedir',
|
|
help = ('The directory used for staging temporary files, ' +
|
|
'if necessary. Default: \033[1m{0}\033[0m').format(_stagedir))
|
|
backupargs.add_argument('-m',
|
|
'--mysqldir',
|
|
default = _mysqldir,
|
|
dest = 'mysqldir',
|
|
help = ('The path to where MySQL dumps should go. ' +
|
|
'Default: \033[1m{0}\033[0m').format(_mysqldir))
|
|
# DISPLAY/OUTPUT ("list") #
|
|
listargs.add_argument('-a',
|
|
'--archive',
|
|
dest = 'archive',
|
|
default = False,
|
|
help = 'If specified, will list the *contents* of the given archive name.')
|
|
listargs.add_argument('-l',
|
|
'--limit',
|
|
dest = 'numlimit',
|
|
type = int,
|
|
default = '5',
|
|
help = ('If specified, constrain the outout to this number of ' +
|
|
'results each repo. Default is \033[1m5\033[0m, use 0 for unlimited. ' +
|
|
'See \033[1m-H/--list-help\033[0m'))
|
|
listargs.add_argument('-s',
|
|
'--sort',
|
|
dest = 'sortby',
|
|
choices = ['newest', 'oldest'],
|
|
default = 'oldest',
|
|
help = ('The order to sort the results by. See \033[1m-H/--list-help\033[0m. ' +
|
|
'Default: \033[1moldest\033[0m'))
|
|
listargs.add_argument('-x',
|
|
'--invert',
|
|
dest = 'invert',
|
|
action = 'store_true',
|
|
help = 'Invert the order of results. See \033[1m-H/--list-help\033[0m.')
|
|
listargs.add_argument('-o',
|
|
'--old',
|
|
dest = 'old',
|
|
action = 'store_true',
|
|
help = ('Instead of grabbing the latest results, grab the earliest results. ' +
|
|
'This differs from \033[1m-s/--sort\033[0m. See \033[1m-H/--list-help\033[0m.'))
|
|
listargs.add_argument('-H',
|
|
'--list-help',
|
|
dest = 'moarhelp',
|
|
action = 'store_true',
|
|
help = 'Print extended information about how to manage the output of listing and exit.')
|
|
return(args)
|
|
|
|
def main():
|
|
rawargs = parseArgs()
|
|
args = vars(rawargs.parse_args())
|
|
args['cfgfile'] = os.path.abspath(os.path.expanduser(args['cfgfile']))
|
|
if not args['oper']:
|
|
rawargs.print_help()
|
|
exit(0)
|
|
if 'moarhelp' in args.keys() and args['moarhelp']:
|
|
printMoarHelp()
|
|
# The "Do stuff" part
|
|
bak = Backup(args)
|
|
if args['oper'] == 'list':
|
|
bak.printer()
|
|
elif args['oper'] == 'listrepos':
|
|
bak.listRepos()
|
|
elif args['oper'] == 'backup':
|
|
bak.create()
|
|
elif args['oper'] == 'init':
|
|
bak.createRepo()
|
|
return()
|
|
|
|
if __name__ == '__main__':
|
|
main()
|