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#!/usr/bin/perl |
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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 $argv:q' |
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if 0; |
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|
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use lib "/usr/share/postgresql/contrib"; |
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|
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use IO::File; |
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use Getopt::Long; |
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use RServ; |
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use Sys::Hostname; |
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|
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$| = 1; |
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|
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$result = GetOptions("debug!", "verbose!", "help", "snapshot=s", |
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"masterhost=s", "slavehost=s", |
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"masteruser=s", "slaveuser=s", |
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"masterpassword=s", "slavepassword=s", |
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"masterport=i", "slaveport=i" |
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); |
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|
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my $debug = $opt_debug || 0; |
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my $verbose = $opt_verbose || 0; |
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my $snapshot = $opt_snapshot || ".__Snapshot"; |
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$snapshot .= '.' . $$; |
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|
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if (defined($opt_help) || (scalar(@ARGV) < 2)) { |
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print "Usage: $0 --snapshot=file masterdb slavedb\n"; |
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print "\t--masterhost=name --masterport=port\n"; |
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print "\t--masteruser=name --masterpassword=string\n"; |
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print "\t--slavehost=name --slaveport=port\n"; |
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print "\t--slaveuser=name --slavepassword=string\n"; |
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exit ((scalar(@ARGV) < 2)? 1:0); |
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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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|
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$masterhost = $opt_masterhost || hostname; |
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$slavehost = $opt_slavehost || hostname; |
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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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$str = $master.'@'.$masterhost.':'.$slave.'@'.$slavehost; |
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my $fname = "/tmp/.lock_rserv-$str"; |
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if (-e $fname) { |
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print STDERR "rServ is already running for $str. Remove $fname to override this.\n"; |
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exit(1); |
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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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my $minfo = "dbname=$master"; |
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$minfo = "$minfo host=$opt_masterhost" if (defined($opt_masterhost)); |
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$minfo = "$minfo user=$opt_masteruser" if (defined($opt_masteruser)); |
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$minfo = "$minfo password=$opt_masterpassword" if (defined($opt_masterpassword)); |
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$minfo = "$minfo port=$opt_masterport" if (defined($opt_masterport)); |
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my $sinfo = "dbname=$slave"; |
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$sinfo = "$sinfo host=$opt_slavehost" if (defined($opt_slavehost)); |
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$sinfo = "$sinfo user=$opt_slaveuser" if (defined($opt_slaveuser)); |
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$sinfo = "$sinfo password=$opt_slavepassword" if (defined($opt_slavepassword)); |
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$sinfo = "$sinfo port=$opt_slaveport" if (defined($opt_slaveport)); |
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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 != 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 != 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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my $slaveId = GetSlaveId($mconn, $slave, defined($opt_slavehost) ? $opt_slavehost : hostname); |
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if ($slaveId < 0) { |
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unlink $fname; |
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die "\n>>>>>>>>>>>>> ERROR\n"; |
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} |
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SyncSync($mconn, $sconn); |
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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 ($verbose); |
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$res = PrepareSnapshot($mconn, $sconn, $outf, $slaveId); |
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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); |
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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 ($verbose); |
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$syncid = GetSyncID($sconn); |
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if ($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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