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#!/usr/bin/perl -w |
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# Replicate |
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# Vadim Mikheev, (c) 2000, PostgreSQL Inc. |
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|
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eval '(exit $?0)' && eval 'exec perl -S $0 ${1+"$@"}' |
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& eval 'exec perl -S $0 $argv:q' |
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if 0; |
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|
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BEGIN { |
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my $basedir = $0; $basedir =~ s#/[^/]+$##; |
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unshift(@INC, "$basedir/../share"); |
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} |
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|
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use strict; |
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use IO::File; |
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use Getopt::Long; |
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use RServ; |
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|
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$| = 1; |
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|
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my ($debug,$verbose) = (0,0); |
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my ($help,$masterhost,$masterport,$masteruser,$masterpassword, |
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$slavehost,$slaveport,$slaveuser,$slavepassword); |
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my $snapshot = ".__Snapshot"; |
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my $multiplemaster = 0; |
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|
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my $result = GetOptions( |
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"debug!" => \$debug, "verbose!" => \$verbose, "help" => \$help, |
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"masterhost=s" => \$masterhost, "masterport=i" => \$masterport, |
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"masteruser=s" => \$masteruser, "masterpassword=s" => \$masterpassword, |
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"slavehost=s" => \$slavehost, "slaveport=i" => \$slaveport, |
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"slaveuser=s" => \$slaveuser, "slavepassword=s" => \$slavepassword, |
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"snapshot=s" => \$snapshot, |
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"multiplemaster" => \$multiplemaster, |
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); |
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|
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if (defined($help) || (scalar(@ARGV) < 2)) { |
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print "Usage: $0 [options] masterdb slavedb |
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Options: |
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--masterhost=hostname --masterport=port |
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--masteruser=username --masterpassword=string |
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--snapshot=snapshot |
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[--masterserver=master_number] |
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"; |
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exit ((scalar(@ARGV) < 2)? 1:0); |
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} |
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|
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$snapshot .= '.' . $$; |
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|
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$RServ::quiet = !$verbose; |
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if ($debug) { |
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$RServ::quiet = 0; |
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no warnings 'vars'; |
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$RServ::debug = $debug; |
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} |
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|
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my $master = $ARGV[0] || "master"; |
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my $slave = $ARGV[1] || "slave"; |
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my $tables = $#ARGV < 2 ? undef : { map {($_, undef)} @ARGV[2..$#ARGV] }; |
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|
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# first, let's check if a instance is alrealy running |
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|
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my $str = $master; |
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$str .= '@'.$masterhost if (defined($masterhost)); |
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$str .= ':'.$slave; |
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$str .= '@'.$slavehost if (defined($slavehost)); |
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my $fname = "/tmp/.lock_rserv-$str"; |
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if (-e $fname) { |
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open(PID,$fname) || die "can't open pid file '$fname'"; |
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my $pid = <PID>; chomp($pid); |
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close(PID); |
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open(PS,"ps ax |") || die "can't start ps to check for running rServ with pid $pid\n"; |
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my $is_running = 0; |
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while(<PS>) { |
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chomp; |
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$is_running = 1 if (/^\s*$pid\s/); |
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} |
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close(PS); |
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if ($is_running) { |
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print STDERR "rServ [$pid] is already running for $str. Remove $fname to override this.\n"; |
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exit(1); |
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} else { |
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print STDERR "found stale pid file, but no running rServ [$pid], overriding.\n"; |
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} |
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} |
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open ARQ, ">$fname" || die "Cannot open $fname: $!\n"; |
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print ARQ "$$\n"; |
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close ARQ; |
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|
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$SIG{__DIE__} = \&mydie; |
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sub mydie { |
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unlink $fname; |
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print @_; |
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exit 1; |
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} |
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|
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|
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my $minfo = "dbname=$master"; |
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$minfo = "$minfo host=$masterhost" if (defined($masterhost)); |
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$minfo = "$minfo port=$masterport" if (defined($masterport)); |
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$minfo = "$minfo user=$masteruser" if (defined($masteruser)); |
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$minfo = "$minfo password=$masterpassword" if (defined($masterpassword)); |
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|
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my $sinfo = "dbname=$slave"; |
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$sinfo = "$sinfo host=$slavehost" if (defined($slavehost)); |
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$sinfo = "$sinfo port=$slaveport" if (defined($slaveport)); |
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$sinfo = "$sinfo user=$slaveuser" if (defined($slaveuser)); |
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$sinfo = "$sinfo password=$slavepassword" if (defined($slavepassword)); |
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|
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print "Master connection is $minfo\n" if ($debug); |
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print "Slave connection is $sinfo\n" if ($debug); |
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|
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my $mconn = Pg::connectdb($minfo); |
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if ($mconn->status != Pg::PGRES_CONNECTION_OK) { |
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print STDERR "Failed opening $minfo\n"; |
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unlink $fname; |
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exit 1; |
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} |
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my $sconn = Pg::connectdb($sinfo); |
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if ($sconn->status != Pg::PGRES_CONNECTION_OK) { |
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print STDERR "Failed opening $sinfo\n"; |
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unlink $fname; |
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exit 1; |
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} |
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|
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$slavehost = 'localhost' if (! $slavehost); |
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$masterhost = 'localhost' if (! $masterhost); |
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|
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my $slaveId = GetServerId($mconn, $slave, $slavehost); |
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|
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die "\n>>>>>>>>>>>>> ERROR: Can't GetServerId for $sinfo\n" if (! defined($slaveId)); |
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|
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if ($slaveId < 0) { |
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unlink $fname; |
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die "\n>>>>>>>>>>>>> ERROR: GetServerId returned $slaveId < 0\n"; |
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} |
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SyncSync($mconn, $sconn); |
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|
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my $masterId = 0; |
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if ($multiplemaster) { |
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my $masterId = GetServerId($mconn, $master, $masterhost); |
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|
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die "\n>>>>>>>>>>>>> ERROR: Can't GetServerId for $sinfo\n" if (! defined($masterId)); |
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|
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if ($masterId < 0) { |
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unlink $fname; |
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die "\n>>>>>>>>>>>>> ERROR: GetServerId returned $masterId < 0\n"; |
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} |
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SyncSync($sconn, $mconn); |
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} |
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|
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my $outf = new IO::File; |
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open $outf, ">$snapshot"; |
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print "\n>>>>>>>>>>>>> Prepare Snapshot\n\n" if ($verbose); |
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print "master id: $masterId slave id: $slaveId\n" if ($debug); |
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my $res = PrepareSnapshot($mconn, $sconn, $outf, $masterId, $slaveId, $tables); |
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close $outf; |
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if ($res < 0) { |
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unlink $fname; |
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die "\n>>>>>>>>>>>>> ERROR\n"; |
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} |
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if ($res == 0) |
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{ |
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print "\n>>>>>>>>>>>>> DBases are sync-ed\n" if ($verbose); |
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unlink $snapshot unless ($debug); |
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unlink $fname; |
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exit(0); |
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} |
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|
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my $inpf = new IO::File; |
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open $inpf, "<$snapshot"; |
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print "\n>>>>>>>>>>>>> Apply Snapshot\n\n" if ($verbose); |
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$res = ApplySnapshot($sconn, $inpf, $tables); |
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close $inpf; |
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if ($res < 0) { |
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unlink $fname; |
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die "\n>>>>>>>>>>>>> ERROR\n"; |
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} |
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|
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if ($res > 0) |
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{ |
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print "Snapshot applied\n" if ($verbose); |
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unlink $snapshot unless ($debug); |
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SyncSync($mconn, $sconn); |
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} |
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|
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unlink $fname; |
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exit(0); |
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|
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########################################################################### |
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|
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sub SyncSync |
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{ |
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($mconn, $sconn) = @_; |
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|
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print "\n>>>>>>>>>>>>> Sync SyncID\n\n" if ($verbose); |
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print "Get last SyncID from Slave DB\n" if ($verbose); |
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my $syncid = GetSyncID($sconn); |
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if ($syncid && $syncid > 0) |
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{ |
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print "Last SyncID applied: $syncid\n" if ($verbose); |
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print "Sync SyncID\n" if ($verbose); |
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|
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$res = SyncSyncID($mconn, $slaveId, $syncid); |
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|
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print "Succeeded\n" if (($res > 0) && ($verbose)); |
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} |
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} |
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