mirror of https://github.com/digint/btrbk
btrbk: changed command line semantics, accepting commands
Axel Burri
parent
a5ad796aeb
commit
ff504b508f
233
btrbk
233
btrbk
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@ -54,10 +54,11 @@ our $PROJECT_HOME = '<http://www.digint.ch/btrbk>';
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my $version_info = "btrfs-backup command line client, version $VERSION";
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my $time_format = "%Y%m%d_%H%M%S";
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my $default_config = "/etc/btrbk.conf";
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my $src_snapshot_dir = "_btrbk_snap";
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my %vol_info;
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my $pretend;
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my $dryrun;
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my $verbose = 0;
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my $debug = 0;
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@ -68,16 +69,19 @@ sub VERSION_MESSAGE
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sub HELP_MESSAGE
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{
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print STDERR "usage: $0 [options] <src_root_volume> <subvol> <dest_root_volume> <subvol>\n";
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print STDERR "usage: $0 [options] <command>\n";
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print STDERR "\n";
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print STDERR "options:\n";
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print STDERR " -h, --help display this help message\n";
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print STDERR " --help display this help message\n";
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print STDERR " --version display version information\n";
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# print STDERR " -i incremental backup\n";
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print STDERR " -c config file\n";
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print STDERR " -v verbose\n";
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print STDERR " -d debug\n";
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print STDERR " -p pretend only (dryrun)\n";
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print STDERR "\n";
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print STDERR "commands:\n";
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print STDERR " info shows information\n";
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print STDERR " execute perform all backups\n";
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print STDERR " dryrun don't run btrfs commands, just show what would be executed\n";
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print STDERR "\n";
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print STDERR "For additional information, see $PROJECT_HOME\n";
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}
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@ -93,7 +97,7 @@ sub run_cmd($;$)
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my $non_destructive = shift;
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my $ret = "";
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INFO "### $cmd" unless($non_destructive);
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if($non_destructive || (not $pretend)) {
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if($non_destructive || (not $dryrun)) {
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DEBUG "### $cmd";
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$ret = `$cmd`;
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chomp($ret);
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@ -121,7 +125,7 @@ sub check_src($$)
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my $root = shift;
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my $vol = shift;
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return 0 unless(check_vol($root, $vol));
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unless($pretend)
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unless($dryrun)
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{
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my $dir = "${root}/${src_snapshot_dir}";
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unless(-d $dir) {
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@ -293,7 +297,7 @@ sub btrfs_send_receive($$;$$)
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my $cmd = "/sbin/btrfs send $parent_option $src | /sbin/btrfs receive $receive_option $dst/ 2>&1";
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my $ret = run_cmd($cmd);
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# run_cmd("/bin/sync");
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if($changelog && (not $pretend))
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if($changelog && (not $dryrun))
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{
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INFO "--- writing changelog: $changelog";
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if(open(LOGFILE, '>>', $changelog)) {
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@ -354,36 +358,47 @@ MAIN:
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$Data::Dumper::Sortkeys = 1;
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my %opts;
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getopts('hc:vdp', \%opts);
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# my $sroot = shift @ARGV;
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# my $svol = shift @ARGV;
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# my $droot = shift @ARGV;
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# my $dvol = shift @ARGV;
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getopts('c:vdp', \%opts);
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my $command = shift @ARGV;
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# assign command line options
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$pretend = $opts{p};
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$debug = $opts{d};
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$verbose = $opts{v} || $debug;
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# my $incremental = $opts{i};
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my $config = $opts{c};
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my $config = $opts{c} || $default_config;
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# check command line options
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if($opts{h} || (not $config)) {
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if($opts{h} || (not $command)) {
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VERSION_MESSAGE();
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HELP_MESSAGE(0);
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exit 0;
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}
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my $jobs = parse_config($config);
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unless($jobs) {
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ERROR "Failed to parse configuration file";
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my $action_execute;
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my $action_info;
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if(($command eq "execute") || ($command eq "dryrun")) {
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$action_execute = 1;
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$dryrun = 1 if($command eq "dryrun");
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}
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elsif($command eq "info") {
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$action_info = 1;
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}
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else {
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ERROR "Unrecognized command: $command";
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HELP_MESSAGE(0);
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exit 1;
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}
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my $postfix = '.' . strftime($time_format, localtime);
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#
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# check jobs, fill vol_info hash
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#
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my $jobs = parse_config($config);
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unless($jobs) {
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ERROR "Failed to parse configuration file";
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exit 1;
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}
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foreach my $job (@$jobs)
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{
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my $sroot = $job->{sroot} || die;
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@ -393,105 +408,119 @@ MAIN:
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}
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DEBUG(Data::Dumper->Dump([\%vol_info], ["vol_info"]));
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#
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# create snapshots
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#
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my %snapshots;
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foreach my $job (@$jobs)
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if($action_info)
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{
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my $sroot = $job->{sroot} || die;
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my $svol = $job->{svol} || die;
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my $droot = $job->{droot} || die;
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my $dvol = $job->{dvol} || die;
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my $type = $job->{type} || die;
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my @job_opts = @{$job->{options}} || die;
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my $ssnap = "$src_snapshot_dir/$svol$postfix";
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if(check_vol($droot, "$dvol/$svol$postfix")) {
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$job->{ABORTED} = 1;
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WARN "snapshot already exists at destination, aborting job: $droot/$dvol/$svol$postfix";
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next;
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}
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unless(check_src($sroot, $svol)) {
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$job->{ABORTED} = 1;
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WARN "source subvolume not found, aborting job: ${sroot}/${svol}";
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next;
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}
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unless($snapshots{"$sroot/$svol"})
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INFO(Data::Dumper->Dump([\%vol_info], ["vol_info"]));
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foreach my $job (@$jobs)
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{
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# make snapshot of svol, if not already created by another job
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die("snapshot source does not exists: $sroot/$svol") unless check_vol($sroot, $svol);
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die("snapshot destination already exists: $sroot/$ssnap") if check_vol($sroot, $ssnap); # TODO: better
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btrfs_snapshot("$sroot/$svol", "$sroot/$ssnap");
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$snapshots{"$sroot/$svol"} = "$sroot/$ssnap";
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my $sroot = $job->{sroot} || die;
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my $svol = $job->{svol} || die;
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my $droot = $job->{droot} || die;
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my $dvol = $job->{dvol} || die;
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print "$sroot/$svol\n"
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}
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$job->{snapshot} = $snapshots{"$sroot/$svol"};
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}
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#
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# create backups
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#
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foreach my $job (@$jobs)
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if($action_execute)
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{
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my $sroot = $job->{sroot} || die;
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my $svol = $job->{svol} || die;
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my $droot = $job->{droot} || die;
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my $dvol = $job->{dvol} || die;
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my $type = $job->{type} || die;
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my $snapshot = $job->{snapshot} || die;
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my @job_opts = @{$job->{options}};
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INFO "***";
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INFO "*** $type\[" . join(',', @job_opts) . "]";
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INFO "*** source: $sroot/$svol";
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INFO "*** dest : $droot/$dvol";
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INFO "***";
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my $changelog = "";
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if(grep(/^log/, @job_opts))
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#
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# create snapshots
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#
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my %snapshots;
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foreach my $job (@$jobs)
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{
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if(my @res = grep(/^log=\S+$/, @job_opts)) {
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die if(scalar(@res) != 1);
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$changelog = $res[0];
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$changelog =~ s/^log=//;
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my $sroot = $job->{sroot} || die;
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my $svol = $job->{svol} || die;
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my $droot = $job->{droot} || die;
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my $dvol = $job->{dvol} || die;
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my $type = $job->{type} || die;
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my $ssnap = "$src_snapshot_dir/$svol$postfix";
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if(check_vol($droot, "$dvol/$svol$postfix")) {
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$job->{ABORTED} = 1;
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WARN "snapshot already exists at destination, aborting job: $droot/$dvol/$svol$postfix";
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next;
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}
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else {
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# log defaults to sidecar of destination snapshot
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$changelog = "$droot/$dvol/${svol}${postfix}.btrbk.log";
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unless(check_src($sroot, $svol)) {
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$job->{ABORTED} = 1;
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WARN "source subvolume not found, aborting job: ${sroot}/${svol}";
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next;
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}
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}
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if(grep(/incremental/, @job_opts))
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{
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INFO "--- processing option=incremental";
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my $latest_common = get_latest_common($sroot, $svol, $droot, $dvol);
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if($latest_common)
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unless($snapshots{"$sroot/$svol"})
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{
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INFO "--- found common parent: $latest_common";
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my $parent_snap = "$src_snapshot_dir/$latest_common";
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die("snapshot parent source does not exists: $sroot/$parent_snap") unless check_vol($sroot, $parent_snap);
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btrfs_send_receive($snapshot, "$droot/$dvol", "$sroot/$parent_snap", $changelog);
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# make snapshot of svol, if not already created by another job
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die("snapshot source does not exists: $sroot/$svol") unless check_vol($sroot, $svol);
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die("snapshot destination already exists: $sroot/$ssnap") if check_vol($sroot, $ssnap); # TODO: better
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btrfs_snapshot("$sroot/$svol", "$sroot/$ssnap");
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$snapshots{"$sroot/$svol"} = "$sroot/$ssnap";
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}
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elsif(grep(/init/, @job_opts)) {
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if(check_vol($droot, $dvol)) {
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INFO "--- no common parent subvolume found, making new snapshot copy (option=init)";
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btrfs_send_receive($snapshot, "$droot/$dvol", undef, $changelog);
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$job->{snapshot} = $snapshots{"$sroot/$svol"};
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}
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#
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# create backups
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#
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foreach my $job (@$jobs)
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{
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my $sroot = $job->{sroot} || die;
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my $svol = $job->{svol} || die;
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my $droot = $job->{droot} || die;
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my $dvol = $job->{dvol} || die;
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my $type = $job->{type} || die;
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my $snapshot = $job->{snapshot} || die;
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my @job_opts = @{$job->{options}};
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INFO "***";
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INFO "*** $type\[" . join(',', @job_opts) . "]";
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INFO "*** source: $sroot/$svol";
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INFO "*** dest : $droot/$dvol";
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INFO "***";
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my $changelog = "";
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if(grep(/^log/, @job_opts))
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{
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if(my @res = grep(/^log=\S+$/, @job_opts)) {
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die if(scalar(@res) != 1);
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$changelog = $res[0];
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$changelog =~ s/^log=//;
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}
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else {
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WARN "backup to $droot failed: target subvolume not found: $droot/$dvol";
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# log defaults to sidecar of destination snapshot
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$changelog = "$droot/$dvol/${svol}${postfix}.btrbk.log";
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}
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}
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else {
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WARN "backup to $droot failed: no common parent subvolume found, and job option \"create\" is not set";
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if(grep(/incremental/, @job_opts))
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{
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INFO "--- processing option=incremental";
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my $latest_common = get_latest_common($sroot, $svol, $droot, $dvol);
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if($latest_common)
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{
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INFO "--- found common parent: $latest_common";
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my $parent_snap = "$src_snapshot_dir/$latest_common";
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die("snapshot parent source does not exists: $sroot/$parent_snap") unless check_vol($sroot, $parent_snap);
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btrfs_send_receive($snapshot, "$droot/$dvol", "$sroot/$parent_snap", $changelog);
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}
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elsif(grep(/init/, @job_opts)) {
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if(check_vol($droot, $dvol)) {
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INFO "--- no common parent subvolume found, making new snapshot copy (option=init)";
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btrfs_send_receive($snapshot, "$droot/$dvol", undef, $changelog);
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}
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else {
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WARN "backup to $droot failed: target subvolume not found: $droot/$dvol";
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}
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}
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else {
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WARN "backup to $droot failed: no common parent subvolume found, and job option \"create\" is not set";
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}
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}
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elsif(grep(/create/, @job_opts))
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{
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INFO "<$type> making new snapshot copy (option=create))";
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btrfs_send_receive($snapshot, "${droot}/${dvol}", undef, $changelog);
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}
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}
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elsif(grep(/create/, @job_opts))
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{
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INFO "<$type> making new snapshot copy (option=create))";
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btrfs_send_receive($snapshot, "${droot}/${dvol}", undef, $changelog);
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}
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}
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}
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1;
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26
btrbk.conf
26
btrbk.conf
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@ -7,25 +7,25 @@
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# log=<logfile> append log to specified logfile
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#
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# <src_mountpoint> <src_subvol> <dst_mountpoint> <dst_subvol_pool> <options>
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# <src_mountpoint> <src_subvol> <dst_mountpoint> <dst_subvol_pool> <options>
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/mnt/btr_system root_gentoo /mnt/btr_ext _btrbk incremental,init
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/mnt/btr_system root_gentoo /mnt/btr_backup _btrbk incremental,init,log
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/mnt/btr_system kvm /mnt/btr_ext _btrbk incremental,init
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/mnt/btr_system kvm /mnt/btr_backup _btrbk incremental,init,log
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/mnt/btr_system root_gentoo /mnt/btr_ext _btrbk incremental,init
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/mnt/btr_system root_gentoo /mnt/btr_backup _btrbk incremental,init,log
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/mnt/btr_system kvm /mnt/btr_ext _btrbk incremental,init
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/mnt/btr_system kvm /mnt/btr_backup _btrbk incremental,init,log
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/mnt/btr_data home /mnt/btr_backup _btrbk incremental,init,log
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/mnt/btr_data sdms.data /mnt/btr_backup _btrbk incremental,init,log
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/mnt/btr_data home /mnt/btr_backup _btrbk incremental,init,log
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/mnt/btr_data sdms.data /mnt/btr_backup _btrbk incremental,init,log
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/mnt/btr_ext data /mnt/btr_backup _btrbk incremental,init,log
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/mnt/btr_ext data /mnt/btr_backup _btrbk incremental,init,log
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# TODO: these monthly
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#/mnt/btr_ext video /mnt/btr_backup _btrbk incremental,init,log
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#/mnt/btr_ext audio /mnt/btr_backup _btrbk incremental,init,log
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#/mnt/btr_ext video /mnt/btr_backup _btrbk incremental,init,log
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#/mnt/btr_ext audio /mnt/btr_backup _btrbk incremental,init,log
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# TODO: these monthly
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#/mnt/btr_boot boot /mnt/btr_ext _btrbk incremental,init,log
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#/mnt/btr_boot boot /mnt/btr_backup _btrbk incremental
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#/mnt/btr_boot boot /mnt/btr_ext _btrbk incremental,init,log
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#/mnt/btr_boot boot /mnt/btr_backup _btrbk incremental
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# non-incremental, create a new snapshot at every invocation!
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##/mnt/btr_boot boot /mnt/btr_backup _btrbk create
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##/mnt/btr_boot boot /mnt/btr_backup _btrbk create
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