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