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fix code passing ruff linter pre-commit ruff pre-commit ruff format
178 lines
7.7 KiB
Python
178 lines
7.7 KiB
Python
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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# -----------------------------------------------------------------------
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# This file is part of TISBackup
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#
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# TISBackup is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# TISBackup is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with TISBackup. If not, see <http://www.gnu.org/licenses/>.
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#
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# -----------------------------------------------------------------------
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import sys
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try:
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sys.stderr = open("/dev/null") # Silence silly warnings from paramiko
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import paramiko
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except ImportError as e:
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print(("Error : can not load paramiko library %s" % e))
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raise
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sys.stderr = sys.__stderr__
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from .common import *
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class backup_pgsql(backup_generic):
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"""Backup a postgresql database as gzipped sql file through ssh"""
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type = "pgsql+ssh"
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required_params = backup_generic.required_params + ["private_key"]
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optional_params = backup_generic.optional_params + ["db_name", "tmp_dir", "encoding"]
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db_name = ""
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tmp_dir = "/tmp"
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encoding = "UTF8"
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def do_backup(self, stats):
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self.dest_dir = os.path.join(self.backup_dir, self.backup_start_date)
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if not os.path.isdir(self.dest_dir):
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if not self.dry_run:
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os.makedirs(self.dest_dir)
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else:
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print(('mkdir "%s"' % self.dest_dir))
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else:
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raise Exception("backup destination directory already exists : %s" % self.dest_dir)
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try:
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mykey = paramiko.RSAKey.from_private_key_file(self.private_key)
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except paramiko.SSHException:
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# mykey = paramiko.DSSKey.from_private_key_file(self.private_key)
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mykey = paramiko.Ed25519Key.from_private_key_file(self.private_key)
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self.logger.debug(
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'[%s] Trying to connect to "%s" with username root and key "%s"', self.backup_name, self.server_name, self.private_key
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)
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self.ssh = paramiko.SSHClient()
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self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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self.ssh.connect(self.server_name, username="root", pkey=mykey, port=self.ssh_port)
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if self.db_name:
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stats["log"] = "Successfully backup processed to the following database :"
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self.do_pgsqldump(stats)
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else:
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stats["log"] = "Successfully backuping processed to the following databases :"
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stats["status"] = "List"
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cmd = """su - postgres -c 'psql -A -t -c "SELECT datname FROM pg_database WHERE datistemplate = false;"' 2> /dev/null"""
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self.logger.debug("[%s] List databases: %s", self.backup_name, cmd)
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(error_code, output) = ssh_exec(cmd, ssh=self.ssh)
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self.logger.debug("[%s] Output of %s :\n%s", self.backup_name, cmd, output)
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if error_code:
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raise Exception('Aborting, Not null exit code (%i) for "%s"' % (error_code, cmd))
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databases = output.split("\n")
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for database in databases:
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if database.strip() not in ("", "template0", "template1"):
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self.db_name = database.strip()
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self.do_pgsqldump(stats)
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stats["status"] = "OK"
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def do_pgsqldump(self, stats):
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t = datetime.datetime.now()
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backup_start_date = t.strftime("%Y%m%d-%Hh%Mm%S")
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params = {
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"encoding": self.encoding,
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"db_name": self.db_name,
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"tmp_dir": self.tmp_dir,
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"dest_dir": self.dest_dir,
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"backup_start_date": backup_start_date,
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}
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# dump db
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filepath = "%(tmp_dir)s/%(db_name)s-%(backup_start_date)s.sql.gz" % params
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cmd = "su - postgres -c 'pg_dump -E %(encoding)s -Z9 %(db_name)s'" % params
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cmd += " > " + filepath
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self.logger.debug("[%s] %s ", self.backup_name, cmd)
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if not self.dry_run:
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(error_code, output) = ssh_exec(cmd, ssh=self.ssh)
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self.logger.debug("[%s] Output of %s :\n%s", self.backup_name, cmd, output)
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if error_code:
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raise Exception('Aborting, Not null exit code (%i) for "%s"' % (error_code, cmd))
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# get the file
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localpath = "%(dest_dir)s/%(db_name)s-%(backup_start_date)s.sql.gz" % params
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self.logger.debug('[%s] get the file using sftp from "%s" to "%s" ', self.backup_name, filepath, localpath)
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if not self.dry_run:
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transport = self.ssh.get_transport()
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sftp = paramiko.SFTPClient.from_transport(transport)
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sftp.get(filepath, localpath)
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sftp.close()
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if not self.dry_run:
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stats["total_files_count"] = 1 + stats.get("total_files_count", 0)
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stats["written_files_count"] = 1 + stats.get("written_files_count", 0)
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stats["total_bytes"] = os.stat(localpath).st_size + stats.get("total_bytes", 0)
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stats["written_bytes"] = os.stat(localpath).st_size + stats.get("written_bytes", 0)
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stats["log"] = '%s "%s"' % (stats["log"], self.db_name)
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stats["backup_location"] = self.dest_dir
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cmd = "rm -f %(tmp_dir)s/%(db_name)s-%(backup_start_date)s.sql.gz" % params
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self.logger.debug("[%s] %s ", self.backup_name, cmd)
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if not self.dry_run:
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(error_code, output) = ssh_exec(cmd, ssh=self.ssh)
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self.logger.debug("[%s] Output of %s :\n%s", self.backup_name, cmd, output)
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if error_code:
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raise Exception('Aborting, Not null exit code (%i) for "%s"' % (error_code, cmd))
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def register_existingbackups(self):
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"""scan backup dir and insert stats in database"""
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registered = [
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b["backup_location"]
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for b in self.dbstat.query("select distinct backup_location from stats where backup_name=?", (self.backup_name,))
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]
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filelist = os.listdir(self.backup_dir)
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filelist.sort()
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p = re.compile("^\d{8,8}-\d{2,2}h\d{2,2}m\d{2,2}$")
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for item in filelist:
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if p.match(item):
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dir_name = os.path.join(self.backup_dir, item)
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if dir_name not in registered:
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start = datetime.datetime.strptime(item, "%Y%m%d-%Hh%Mm%S").isoformat()
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if fileisodate(dir_name) > start:
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stop = fileisodate(dir_name)
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else:
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stop = start
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self.logger.info("Registering %s started on %s", dir_name, start)
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self.logger.debug(" Disk usage %s", 'du -sb "%s"' % dir_name)
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if not self.dry_run:
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size_bytes = int(os.popen('du -sb "%s"' % dir_name).read().split("\t")[0])
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else:
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size_bytes = 0
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self.logger.debug(" Size in bytes : %i", size_bytes)
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if not self.dry_run:
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self.dbstat.add(
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self.backup_name,
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self.server_name,
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"",
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backup_start=start,
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backup_end=stop,
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status="OK",
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total_bytes=size_bytes,
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backup_location=dir_name,
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)
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else:
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self.logger.info("Skipping %s, already registered", dir_name)
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register_driver(backup_pgsql)
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