mirror of
https://github.com/pgbackrest/pgbackrest.git
synced 2024-12-14 10:13:05 +02:00
570 lines
21 KiB
Perl
Executable File
570 lines
21 KiB
Perl
Executable File
#!/usr/bin/perl
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####################################################################################################################################
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# pg_backrest.pl - Simple Postgres Backup and Restore
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####################################################################################################################################
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####################################################################################################################################
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# Perl includes
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####################################################################################################################################
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use threads;
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use strict;
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use warnings;
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use Carp;
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use File::Basename;
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use Pod::Usage;
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use lib dirname($0) . '/../lib';
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use BackRest::Utility;
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use BackRest::Config;
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use BackRest::Remote;
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use BackRest::File;
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use BackRest::Backup;
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use BackRest::Restore;
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use BackRest::Db;
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####################################################################################################################################
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# Usage
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####################################################################################################################################
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=head1 NAME
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pg_backrest.pl - Simple Postgres Backup and Restore
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=head1 SYNOPSIS
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pg_backrest.pl [options] [operation]
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Operations:
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archive-get retrieve an archive file from backup
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archive-push push an archive file to backup
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backup backup a cluster
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restore restore a cluster
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expire expire old backups (automatically run after backup)
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General Options:
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--stanza stanza (cluster) to operate on (currently required for all operations)
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--config alternate path for pg_backrest.conf (defaults to /etc/pg_backrest.conf)
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--version display version and exit
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--help display usage and exit
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Backup Options:
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--type type of backup to perform (full, diff, incr)
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--no-start-stop do not call pg_start/stop_backup(). Postmaster should not be running.
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--force force backup when --no-start-stop passed and postmaster.pid exists.
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Use with extreme caution as this will probably produce an inconsistent backup!
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Restore Options:
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--set backup set to restore (defaults to latest set).
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--delta perform a delta restore using checksums when present.
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--force force a restore and overwrite all existing files.
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with --delta forces size/timestamp delta even if checksums are present.
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Recovery Options:
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--type type of recovery:
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name - restore point target
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time - timestamp target
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xid - transaction id target
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preserve - preserve the existing recovery.conf
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none - no recovery past database becoming consistent
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default - recover to end of archive log stream
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--target recovery target if type is name, time, or xid.
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--target-exclusive stop just before the recovery target (default is inclusive).
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--target-resume do not pause after recovery (default is to pause).
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--target-timeline recover into specified timeline (default is current timeline).
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=cut
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####################################################################################################################################
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# Global variables
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####################################################################################################################################
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my $oRemote; # Remote object
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my $strRemote; # Defines which side is remote, DB or BACKUP
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####################################################################################################################################
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# REMOTE_GET - Get the remote object or create it if not exists
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####################################################################################################################################
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sub remote_get
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{
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if (!defined($oRemote) && $strRemote ne NONE)
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{
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$oRemote = new BackRest::Remote
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(
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config_key_load($strRemote eq DB ? CONFIG_SECTION_STANZA : CONFIG_SECTION_BACKUP, CONFIG_KEY_HOST, true),
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config_key_load($strRemote eq DB ? CONFIG_SECTION_STANZA : CONFIG_SECTION_BACKUP, CONFIG_KEY_USER, true),
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config_key_load(CONFIG_SECTION_COMMAND, CONFIG_KEY_REMOTE, true)
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);
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}
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return $oRemote;
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}
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####################################################################################################################################
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# SAFE_EXIT - terminate all SSH sessions when the script is terminated
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####################################################################################################################################
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sub safe_exit
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{
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remote_exit();
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my $iTotal = backup_thread_kill();
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confess &log(ERROR, "process was terminated on signal, ${iTotal} threads stopped");
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}
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$SIG{TERM} = \&safe_exit;
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$SIG{HUP} = \&safe_exit;
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$SIG{INT} = \&safe_exit;
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####################################################################################################################################
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# REMOTE_EXIT - Close the remote object if it exists
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####################################################################################################################################
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sub remote_exit
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{
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my $iExitCode = shift;
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if (defined($oRemote))
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{
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$oRemote->thread_kill()
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}
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if (defined($iExitCode))
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{
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exit $iExitCode;
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}
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}
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####################################################################################################################################
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# START EVAL BLOCK TO CATCH ERRORS AND STOP THREADS
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####################################################################################################################################
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eval {
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####################################################################################################################################
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# Load command line parameters and config
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####################################################################################################################################
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config_load();
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####################################################################################################################################
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# DETERMINE IF THERE IS A REMOTE
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####################################################################################################################################
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# First check if backup is remote
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if (defined(config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_HOST)))
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{
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$strRemote = BACKUP;
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}
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# Else check if db is remote
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elsif (defined(config_key_load(CONFIG_SECTION_STANZA, CONFIG_KEY_HOST)))
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{
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# Don't allow both sides to be remote
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if (defined($strRemote))
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{
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confess &log(ERROR, 'db and backup cannot both be configured as remote');
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}
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$strRemote = DB;
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}
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else
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{
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$strRemote = NONE;
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}
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####################################################################################################################################
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# ARCHIVE-PUSH Command
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####################################################################################################################################
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if (operation_get() eq OP_ARCHIVE_PUSH)
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{
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# Make sure the archive push operation happens on the db side
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if ($strRemote eq DB)
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{
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confess &log(ERROR, 'archive-push operation must run on the db host');
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}
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# If an archive section has been defined, use that instead of the backup section when operation is OP_ARCHIVE_PUSH
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my $bArchiveLocal = defined(config_key_load(CONFIG_SECTION_ARCHIVE, CONFIG_KEY_PATH));
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my $strSection = $bArchiveLocal ? CONFIG_SECTION_ARCHIVE : CONFIG_SECTION_BACKUP;
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my $strArchivePath = config_key_load($strSection, CONFIG_KEY_PATH);
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# Get checksum flag
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my $bChecksum = config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_CHECKSUM, true, 'y') eq 'y' ? true : false;
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# Get the async compress flag. If compress_async=y then compression is off for the initial push when archiving locally
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my $bCompressAsync = false;
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if ($bArchiveLocal)
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{
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config_key_load($strSection, CONFIG_KEY_COMPRESS_ASYNC, true, 'n') eq 'n' ? false : true;
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}
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# If logging locally then create the stop archiving file name
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my $strStopFile;
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if ($bArchiveLocal)
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{
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$strStopFile = "${strArchivePath}/lock/" + param_get(PARAM_STANZA) + "-archive.stop";
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}
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# If an archive file is defined, then push it
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if (defined($ARGV[1]))
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{
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# If the stop file exists then discard the archive log
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if (defined($strStopFile))
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{
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if (-e $strStopFile)
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{
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&log(ERROR, "archive stop file (${strStopFile}) exists , discarding " . basename($ARGV[1]));
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remote_exit(0);
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}
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}
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# Get the compress flag
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my $bCompress = $bCompressAsync ? false : config_key_load($strSection, CONFIG_KEY_COMPRESS, true, 'y') eq 'y' ? true : false;
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# Create the file object
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my $oFile = new BackRest::File
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(
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param_get(PARAM_STANZA),
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config_key_load($strSection, CONFIG_KEY_PATH, true),
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$bArchiveLocal ? NONE : $strRemote,
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$bArchiveLocal ? undef : remote_get()
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);
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# Init backup
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backup_init
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(
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undef,
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$oFile,
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undef,
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$bCompress,
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undef,
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!$bChecksum
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);
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&log(INFO, 'pushing archive log ' . $ARGV[1] . ($bArchiveLocal ? ' asynchronously' : ''));
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archive_push(config_key_load(CONFIG_SECTION_STANZA, CONFIG_KEY_PATH), $ARGV[1]);
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# Exit if we are archiving local but no backup host has been defined
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if (!($bArchiveLocal && defined(config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_HOST))))
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{
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remote_exit(0);
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}
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# Fork and exit the parent process so the async process can continue
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if (!param_get(PARAM_TEST_NO_FORK))
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{
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if (fork())
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{
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remote_exit(0);
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}
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}
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# Else the no-fork flag has been specified for testing
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else
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{
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&log(INFO, 'No fork on archive local for TESTING');
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}
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}
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# If no backup host is defined it makes no sense to run archive-push without a specified archive file so throw an error
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if (!defined(config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_HOST)))
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{
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&log(ERROR, 'archive-push called without an archive file or backup host');
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}
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&log(INFO, 'starting async archive-push');
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# Create a lock file to make sure async archive-push does not run more than once
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my $strLockPath = "${strArchivePath}/lock/" . param_get(PARAM_STANZA) . "-archive.lock";
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if (!lock_file_create($strLockPath))
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{
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&log(DEBUG, 'archive-push process is already running - exiting');
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remote_exit(0);
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}
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# Build the basic command string that will be used to modify the command during processing
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my $strCommand = $^X . ' ' . $0 . " --stanza=" . param_get(PARAM_STANZA);
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# Get the new operational flags
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my $bCompress = config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_COMPRESS, true, 'y') eq 'y' ? true : false;
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my $iArchiveMaxMB = config_key_load(CONFIG_SECTION_ARCHIVE, CONFIG_KEY_ARCHIVE_MAX_MB);
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# eval
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# {
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# Create the file object
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my $oFile = new BackRest::File
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(
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param_get(PARAM_STANZA),
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config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_PATH, true),
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$strRemote,
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remote_get()
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);
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# Init backup
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backup_init
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(
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undef,
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$oFile,
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undef,
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$bCompress,
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undef,
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!$bChecksum,
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config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_THREAD_MAX),
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undef,
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config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_THREAD_TIMEOUT)
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);
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# Call the archive_xfer function and continue to loop as long as there are files to process
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my $iLogTotal;
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while (!defined($iLogTotal) || $iLogTotal > 0)
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{
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$iLogTotal = archive_xfer($strArchivePath . "/archive/" . param_get(PARAM_STANZA), $strStopFile,
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$strCommand, $iArchiveMaxMB);
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if ($iLogTotal > 0)
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{
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&log(DEBUG, "${iLogTotal} archive logs were transferred, calling archive_xfer() again");
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}
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else
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{
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&log(DEBUG, 'no more logs to transfer - exiting');
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}
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}
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#
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# };
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# # If there were errors above then start compressing
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# if ($@)
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# {
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# if ($bCompressAsync)
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# {
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# &log(ERROR, "error during transfer: $@");
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# &log(WARN, "errors during transfer, starting compression");
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#
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# # Run file_init_archive - this is the minimal config needed to run archive pulling !!! need to close the old file
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# my $oFile = BackRest::File->new
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# (
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# # strStanza => $strStanza,
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# # bNoCompression => false,
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# # strBackupPath => config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_PATH, true),
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# # strCommand => $0,
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# # strCommandCompress => config_key_load(CONFIG_SECTION_COMMAND, CONFIG_KEY_COMPRESS, $bCompress),
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# # strCommandDecompress => config_key_load(CONFIG_SECTION_COMMAND, CONFIG_KEY_DECOMPRESS, $bCompress)
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# );
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#
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# backup_init
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# (
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# undef,
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# $oFile,
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# undef,
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# $bCompress,
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# undef,
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# !$bChecksum,
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# config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_THREAD_MAX),
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# undef,
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# config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_THREAD_TIMEOUT)
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# );
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#
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# archive_compress($strArchivePath . "/archive/${strStanza}", $strCommand, 256);
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# }
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# else
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# {
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# confess $@;
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# }
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# }
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lock_file_remove();
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remote_exit(0);
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}
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####################################################################################################################################
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# ARCHIVE-GET Command
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####################################################################################################################################
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if (operation_get() eq OP_ARCHIVE_GET)
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{
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# Make sure the archive file is defined
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if (!defined($ARGV[1]))
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{
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confess &log(ERROR, 'archive file not provided');
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}
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# Make sure the destination file is defined
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if (!defined($ARGV[2]))
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{
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confess &log(ERROR, 'destination file not provided');
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}
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# Init the file object
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my $oFile = new BackRest::File
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(
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param_get(PARAM_STANZA),
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config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_PATH, true),
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$strRemote,
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remote_get()
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);
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# Init the backup object
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backup_init
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(
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undef,
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$oFile
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);
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# Info for the Postgres log
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&log(INFO, 'getting archive log ' . $ARGV[1]);
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# Get the archive file
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remote_exit(archive_get(config_key_load(CONFIG_SECTION_STANZA, CONFIG_KEY_PATH), $ARGV[1], $ARGV[2]));
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}
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####################################################################################################################################
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# Initialize the default file object
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####################################################################################################################################
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my $oFile = new BackRest::File
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(
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param_get(PARAM_STANZA),
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config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_PATH, true),
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$strRemote,
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remote_get()
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);
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####################################################################################################################################
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# RESTORE
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####################################################################################################################################
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if (operation_get() eq OP_RESTORE)
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{
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if ($strRemote eq DB)
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{
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confess &log(ASSERT, 'restore operation must be performed locally on the db server');
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}
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# Open the log file
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log_file_set(config_key_load(CONFIG_SECTION_RESTORE, CONFIG_KEY_PATH, true) . '/log/' . param_get(PARAM_STANZA) . '-restore');
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# Set the lock path
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my $strLockPath = config_key_load(CONFIG_SECTION_RESTORE, CONFIG_KEY_PATH, true) . '/lock/' .
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param_get(PARAM_STANZA) . '-' . operation_get() . '.lock';
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# Do the restore
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new BackRest::Restore
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(
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config_key_load(CONFIG_SECTION_STANZA, CONFIG_KEY_PATH),
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param_get(PARAM_SET),
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config_section_load(CONFIG_SECTION_TABLESPACE_MAP),
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$oFile,
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undef, #param_get(PARAM_THREAD),
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param_get(PARAM_DELTA),
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param_get(PARAM_FORCE),
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param_get(PARAM_TYPE),
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param_get(PARAM_TARGET),
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param_get(PARAM_TARGET_EXCLUSIVE),
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param_get(PARAM_TARGET_RESUME),
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param_get(PARAM_TARGET_TIMELINE),
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config_section_load(CONFIG_SECTION_RECOVERY)
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)->restore;
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remote_exit(0);
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}
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####################################################################################################################################
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# GET MORE CONFIG INFO
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####################################################################################################################################
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# Open the log file
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log_file_set(config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_PATH, true) . '/log/' . param_get(PARAM_STANZA));
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# Make sure backup and expire operations happen on the backup side
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if ($strRemote eq BACKUP)
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{
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confess &log(ERROR, 'backup and expire operations must run on the backup host');
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}
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# Get the operational flags
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my $bCompress = config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_COMPRESS, true, 'y') eq 'y' ? true : false;
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my $bChecksum = config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_CHECKSUM, true, 'y') eq 'y' ? true : false;
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# Set the lock path
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my $strLockPath = config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_PATH, true) . '/lock/' .
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param_get(PARAM_STANZA) . '-' . operation_get() . '.lock';
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if (!lock_file_create($strLockPath))
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{
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&log(ERROR, 'backup process is already running for stanza ' . param_get(PARAM_STANZA) . ' - exiting');
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remote_exit(0);
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}
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# Initialize the db object
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my $oDb;
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if (!param_get(PARAM_NO_START_STOP))
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{
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$oDb = new BackRest::Db
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(
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config_key_load(CONFIG_SECTION_COMMAND, CONFIG_KEY_PSQL),
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config_key_load(CONFIG_SECTION_STANZA, CONFIG_KEY_HOST),
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config_key_load(CONFIG_SECTION_STANZA, CONFIG_KEY_USER)
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);
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}
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# Run backup_init - parameters required for backup and restore operations
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backup_init
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(
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$oDb,
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$oFile,
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param_get(PARAM_TYPE),
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config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_COMPRESS, true, 'y') eq 'y' ? true : false,
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config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_HARDLINK, true, 'y') eq 'y' ? true : false,
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!$bChecksum,
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config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_THREAD_MAX),
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config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_ARCHIVE_REQUIRED, true, 'y') eq 'y' ? true : false,
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config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_THREAD_TIMEOUT),
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param_get(PARAM_NO_START_STOP),
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param_get(PARAM_FORCE)
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);
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####################################################################################################################################
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# BACKUP
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####################################################################################################################################
|
|
if (operation_get() eq OP_BACKUP)
|
|
{
|
|
backup(config_key_load(CONFIG_SECTION_STANZA, CONFIG_KEY_PATH),
|
|
config_key_load(CONFIG_SECTION_BACKUP, CONFIG_KEY_START_FAST, true, 'n') eq 'y' ? true : false);
|
|
|
|
operation_set(OP_EXPIRE);
|
|
}
|
|
|
|
####################################################################################################################################
|
|
# EXPIRE
|
|
####################################################################################################################################
|
|
if (operation_get() eq OP_EXPIRE)
|
|
{
|
|
backup_expire
|
|
(
|
|
$oFile->path_get(PATH_BACKUP_CLUSTER),
|
|
config_key_load(CONFIG_SECTION_RETENTION, CONFIG_KEY_FULL_RETENTION),
|
|
config_key_load(CONFIG_SECTION_RETENTION, CONFIG_KEY_DIFFERENTIAL_RETENTION),
|
|
config_key_load(CONFIG_SECTION_RETENTION, CONFIG_KEY_ARCHIVE_RETENTION_TYPE),
|
|
config_key_load(CONFIG_SECTION_RETENTION, CONFIG_KEY_ARCHIVE_RETENTION)
|
|
);
|
|
|
|
lock_file_remove();
|
|
}
|
|
|
|
remote_exit(0);
|
|
};
|
|
|
|
####################################################################################################################################
|
|
# CHECK FOR ERRORS AND STOP THREADS
|
|
####################################################################################################################################
|
|
if ($@)
|
|
{
|
|
my $oMessage = $@;
|
|
|
|
# If a backrest exception then return the code - don't confess
|
|
if ($oMessage->isa('BackRest::Exception'))
|
|
{
|
|
remote_exit($oMessage->code());
|
|
}
|
|
|
|
remote_exit();
|
|
confess $@;
|
|
}
|