5 Simpliest possible backup from remote host (with natcat as
6 only depenency) to ad-hoc remote server
8 Install on client with:
10 echo install | nc 127.0.0.1 9001 > bak ; chmod 755 bak
14 ./server.pl /path/to/backup 127.0.0.1
16 You will want to add following to C<~/.ssh/config>
18 RemoteForward 9001 localhost:9001
31 'install!' => \$install,
34 my ( $dir, $server_ip ) = @ARGV;
35 die "usage: $0 /backup/directory\n" unless $dir;
36 $server_ip ||= '127.0.0.1';
38 my $shell_client = <<__SHELL_CLIENT__;
40 echo `hostname -s` `pwd` \$* | nc $server_ip 9001
44 system 'git init' unless -e '.git';
47 open(my $fh, '>', '/tmp/bak');
48 print $fh $shell_client;
51 foreach my $hostname ( glob '*' ) {
52 warn "install on $hostname\n";
53 system "scp /tmp/bak root\@$hostname:/usr/local/bin/";
57 my $server = IO::Socket::INET->new(
59 LocalAddr => $server_ip,
66 warn "dir: $dir listen: $server_ip:9001\n"
67 , "remote-host> echo install | nc $server_ip 9001 > bak ; chmod 755 bak\n"
71 while (my $client = $server->accept()) {
72 my ($hostname,$pwd,$command,$path,$message) = split(/\s+/,<$client>,5);
74 if ( $pwd eq 'install' ) {
75 warn "install on $hostname\n";
76 print $client $shell_client;
78 system 'ssh-copy-id', "root\@$hostname" if ! -d $hostname;
83 $path = "$pwd/$path" unless $path =~ m{^/};
85 warn "$hostname [$command] $path | $message\n";
91 mkpath "$hostname/$dir" unless -e "$hostname/$dir";
94 system "find $hostname -type f | sed 's,$hostname,,' > /tmp/$hostname.list";
95 system "rsync -avv --files-from /tmp/$hostname.list root\@$hostname:/ $hostname/"
96 } elsif ( $command eq 'add' ) {
97 system 'rsync', '-avv', "root\@$hostname:$path", "$hostname/$path";
98 system 'git', 'add', "$hostname/$path";
99 } elsif ( $command eq 'commit' ) {
100 system 'rsync', '-avv', "root\@$hostname:$path", "$hostname/$path" if $path;
101 $message ||= "$command $hostname $path";
102 system 'git', 'commit', '-m', $message, "$hostname/$path";
103 } elsif ( $command =~ m{(diff|status|log)} ) {
104 my $opt = '--summary' if $command eq 'log';
105 print $client `git $command $opt $hostname`;
106 } elsif ( $command eq 'revert' ) {
107 print $client `git checkout -- $hostname/$path`;
108 system 'rsync', '-avv', "$hostname/$path", "root\@$hostname:$path";
110 print $client "Unknown command: $command\n";