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#!/usr/bin/perl |
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|
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package Sack::Server; |
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|
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use warnings; |
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use strict; |
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|
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use IO::Socket::INET; |
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use IO::Select; |
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|
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use Data::Dump qw(dump); |
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use Storable qw(); |
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use File::Slurp; |
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use Cwd qw(abs_path); |
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|
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my @cloud; |
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my $cloud_path = $ENV{CLOUD} || die "start with: CLOUD=etc/cloud perl -I/srv/Sack/lib $0\n"; |
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@cloud = read_file $cloud_path; |
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@cloud = map { chomp $_; $_ } @cloud; |
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|
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warn "# cloud ",dump( @cloud ); |
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|
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my $listen_port = 4444; |
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|
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my $node_path = abs_path $0; |
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$node_path =~ s{Server}{Client}; |
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|
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my $lsn = IO::Socket::INET->new(Listen => 1, LocalPort => $listen_port, Reuse => 1) or die $!; |
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my $sel = IO::Select->new($lsn); |
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|
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my $info; |
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sub info { |
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my $port = shift; |
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push @{ $info->{$port} }, [ @_ ]; |
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} |
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|
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sub fork_ssh { |
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my ( $port, $host ) = @_; |
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|
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if ( my $pid = fork ) { |
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# parent |
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info $port => 'forked', $pid; |
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return $port; |
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|
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} elsif ( ! defined $pid ) { |
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warn "can't fork $host $port"; |
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return; |
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} else { |
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# child |
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my $cmd = qq|ssh -F $cloud_path.ssh -R $port:127.0.0.1:$listen_port $host $node_path $port|; |
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warn "# exec: $cmd\n"; |
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exec $cmd; |
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} |
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} |
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|
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my $node_port = 4000; |
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|
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foreach my $host ( @cloud ) { |
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system "find /srv/Sack/ | cpio --create --dereference | ssh -T -F $cloud_path.ssh $host cpio --extract --make-directories --unconditional"; |
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fork_ssh( $node_port++, $host ); |
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} |
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|
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my $session; |
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|
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sub to_all { |
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my $data = shift; |
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foreach my $port ( keys %{ $session->{port} } ) { |
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warn ">>>> [$port]\n"; |
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Storable::store_fd( $data, $session->{port}->{$port} ); |
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} |
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} |
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|
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my @shard_paths; |
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|
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while (1) { |
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for my $sock ($sel->can_read(1)) { |
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if ($sock == $lsn) { |
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my $new = $lsn->accept; |
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$sel->add($new); |
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$session->{peerport}->{ $new->peerport } = $new; |
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warn "[socket] connect\n"; |
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Storable::store_fd( { ping => 1 }, $new ); |
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info 0 => 'ping', $new->peerport; |
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} else { |
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my $data = eval { Storable::fd_retrieve( $sock ) }; |
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if ( $@ ) { |
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delete $session->{$sock}; |
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warn "[socket] disconnect: $@\n"; |
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$sel->remove($sock); |
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$sock->close; |
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} else { |
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warn "<<<< ", dump($data), $/; |
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|
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if ( my $path = $data->{shard} ) { |
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push @{ $info->{shard}->{ $data->{port} } }, $path; |
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} |
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|
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if ( my $repl = $data->{repl} ) { |
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my $response = { repl_pid => $$ }; |
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if ( $repl =~ m/ping/ ) { |
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to_all { ping => 1 }; |
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} elsif ( $repl =~ m/info/ ) { |
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$response->{info} = $info; |
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} elsif ( $repl =~ m{load\s*(\S+)?} ) { |
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my $name = $1 || 'shard'; |
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@shard_paths = glob "/tmp/sack/$name/*"; |
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warn "loading shards ", dump( @shard_paths ); |
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to_all { load => $name }; |
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} elsif ( $repl =~ m{view\s*(\S+)?} ) { |
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my $path = $1 || '/srv/Sack/views/00.demo.pl'; |
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my $code = read_file $path; |
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to_all { view => $code, path => $path }; |
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$response->{view}->{$path}->{running}; |
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} elsif ( $repl =~ m{debug\s*(.+)?} ) { |
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to_all { debug => $1 }; |
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} else { |
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$response->{error}->{unknown} = $data; |
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} |
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Storable::store_fd( $response, $sock ); |
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} elsif ( $data->{ping} ) { |
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my $port = $data->{port}; |
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info $port => 'ping', $port; |
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$session->{port}->{ $data->{port} } = $sock; |
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} elsif ( $data->{load} eq 'shard' ) { |
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if ( my $path = shift @shard_paths ) { |
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warn "retrieve $path ", -s $path; |
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my $shard = Storable::retrieve $path; |
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warn ">>>> [", $data->{port}, "] sending shard $path\n"; |
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Storable::store_fd( { path => $path, shard => $shard }, $sock ); |
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} else { |
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warn "no more shards for [", $data->{port}, "]\n"; |
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} |
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} else { |
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warn "UNKNOWN ",dump($data); |
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} |
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} |
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} |
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} |
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} |
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