/[rserv]/bin/Replicate
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 1.2 by dpavlin, Tue Aug 5 09:20:08 2003 UTC revision 1.6 by dpavlin, Tue Aug 5 21:41:25 2003 UTC
# Line 1  Line 1 
1  #!/usr/bin/perl  #!/usr/bin/perl -w
2  # Replicate  # Replicate
3  # Vadim Mikheev, (c) 2000, PostgreSQL Inc.  # Vadim Mikheev, (c) 2000, PostgreSQL Inc.
4    
# Line 6  eval '(exit $?0)' && eval 'exec perl -S Line 6  eval '(exit $?0)' && eval 'exec perl -S
6      & eval 'exec perl -S $0 $argv:q'      & eval 'exec perl -S $0 $argv:q'
7      if 0;      if 0;
8    
9  use lib "/usr/share/postgresql/contrib";  BEGIN {
10            my $basedir = $0; $basedir =~ s#/[^/]+$##;
11            unshift(@INC, "$basedir/../share");
12    }
13    
14    use strict;
15  use IO::File;  use IO::File;
16  use Getopt::Long;  use Getopt::Long;
17  use RServ;  use RServ;
18    use Sys::Hostname;
19    
20  $| = 1;  $| = 1;
21    
22  $result = GetOptions("debug!", "verbose!", "help", "snapshot=s",  my ($debug,$verbose) = (0,0);
23                       "masterhost=s", "slavehost=s", "host=s",  my ($help,$masterhost,$masterport,$masteruser,$masterpassword,
24                       "masteruser=s", "slaveuser=s", "user=s",          $slavehost,$slaveport,$slaveuser,$slavepassword);
25                       "masterpassword=s", "slavepassword=s", "password=s");  my $snapshot = ".__Snapshot";
26    
27  my $debug = $opt_debug || 0;  my $result = GetOptions(
28  my $verbose = $opt_verbose || 0;          "debug!" => \$debug, "verbose!" => \$verbose, "help" => \$help,
29  my $snapshot = $opt_snapshot || "__Snapshot";          "masterhost=s" => \$masterhost, "masterport=i" => \$masterport,
30            "masteruser=s" => \$masteruser, "masterpassword=s" => \$masterpassword,
31  if (defined($opt_help) || (scalar(@ARGV) < 2)) {          "snapshot=s" => \$snapshot,
32      print "Usage: $0 --snapshot=file --host=name --user=name --password=string masterdb slavedb\n";          );
33      print "\t--masterhost=name --masteruser=name --masterpassword=string\n";  
34      print "\t--slavehost=name --slaveuser=name --slavepassword=string\n";  if (defined($help) || (scalar(@ARGV) < 2)) {
35        print "Usage: $0 [options] masterdb slavedb
36    Options:
37            --masterhost=hostname --masterport=port
38            --masteruser=username --masterpassword=string
39            --snapshot=snapshot
40    ";
41      exit ((scalar(@ARGV) < 2)? 1:0);      exit ((scalar(@ARGV) < 2)? 1:0);
42  }  }
43    
44    $snapshot .= '.' . $$;
45    
46    $RServ::quiet = !$verbose;
47    if ($debug) {
48            $RServ::quiet = 0;
49            no warnings 'vars';
50            $RServ::debug = $debug;
51    }
52    
53  my $master = $ARGV[0] || "master";  my $master = $ARGV[0] || "master";
54  my $slave = $ARGV[1] || "slave";  my $slave = $ARGV[1] || "slave";
55  my $server = 0;  
56    # first, let's check if a instance is alrealy running
57    
58    my $str = $master.'@'.$masterhost.':'.$slave.'@'.$slavehost;
59    my $fname = "/tmp/.lock_rserv-$str";
60    if (-e $fname) {
61        print STDERR "rServ is already running for $str. Remove $fname to override this.\n";
62        exit(1);
63    }
64    open ARQ, ">$fname" || die "Cannot open $fname: $!\n";
65    print ARQ "$$\n";
66    close ARQ;
67    
68  my $minfo = "dbname=$master";  my $minfo = "dbname=$master";
69  $minfo = "$minfo host=$opt_masterhost" if (defined($opt_masterhost));  $minfo = "$minfo host=$masterhost" if (defined($masterhost));
70  $minfo = "$minfo user=$opt_masteruser" if (defined($opt_masteruser));  $minfo = "$minfo port=$masterport" if (defined($masterport));
71  $minfo = "$minfo password=$opt_masterpassword" if (defined($opt_masterpassword));  $minfo = "$minfo user=$masteruser" if (defined($masteruser));
72    $minfo = "$minfo password=$masterpassword" if (defined($masterpassword));
73    
74  my $sinfo = "dbname=$slave";  my $sinfo = "dbname=$slave";
75  $sinfo = "$sinfo host=$opt_slavehost" if (defined($opt_slavehost));  $sinfo = "$sinfo host=$slavehost" if (defined($slavehost));
76  $sinfo = "$sinfo user=$opt_slaveuser" if (defined($opt_slaveuser));  $sinfo = "$sinfo port=$slaveport" if (defined($slaveport));
77  $sinfo = "$sinfo password=$opt_slavepassword" if (defined($opt_slavepassword));  $sinfo = "$sinfo user=$slaveuser" if (defined($slaveuser));
78    $sinfo = "$sinfo password=$slavepassword" if (defined($slavepassword));
79    
80  print "Master connection is $minfo\n" if ($debug);  print "Master connection is $minfo\n" if ($debug);
81  print "Slave connection is $sinfo\n" if ($debug);  print "Slave connection is $sinfo\n" if ($debug);
82    
83  my $mconn = Pg::connectdb($minfo);  my $mconn = Pg::connectdb($minfo);
84    if ($mconn->status != Pg::PGRES_CONNECTION_OK) {
85        print STDERR "Failed opening $minfo\n";
86        unlink $fname;
87        exit 1;
88    }
89  my $sconn = Pg::connectdb($sinfo);  my $sconn = Pg::connectdb($sinfo);
90    if ($sconn->status != Pg::PGRES_CONNECTION_OK) {
91        print STDERR "Failed opening $sinfo\n";
92        unlink $fname;
93        exit 1;
94    }
95    
96  $RServ::quiet = !$verbose;  my $slaveId = GetSlaveId($mconn, $slave, defined($slavehost) ? $slavehost : hostname);
97    if ($slaveId < 0) {
98        unlink $fname;
99        die "\n>>>>>>>>>>>>> ERROR\n";
100    }
101  SyncSync($mconn, $sconn);  SyncSync($mconn, $sconn);
102    
103  my $outf = new IO::File;  my $outf = new IO::File;
104  open $outf, ">$snapshot";  open $outf, ">$snapshot";
105  print "\n>>>>>>>>>>>>> Prepare Snapshot\n\n" if ($verbose);  print "\n>>>>>>>>>>>>> Prepare Snapshot\n\n" if ($verbose);
106  $res = PrepareSnapshot($mconn, $outf, $server);  my $res = PrepareSnapshot($mconn, $sconn, $outf, $slaveId);
107  close $outf;  close $outf;
108  die "\n>>>>>>>>>>>>> ERROR\n" if $res < 0;  if ($res < 0) {
109        unlink $fname;
110        die "\n>>>>>>>>>>>>> ERROR\n";
111    }
112  if ($res == 0)  if ($res == 0)
113  {  {
114          print "\n>>>>>>>>>>>>> DBases are sync-ed\n" if ($verbose);      print "\n>>>>>>>>>>>>> DBases are sync-ed\n" if ($verbose);
115          exit(0);      unlink $snapshot unless ($debug);
116        unlink $fname;
117        exit(0);
118  }  }
119    
120  my $inpf = new IO::File;  my $inpf = new IO::File;
# Line 70  open $inpf, "<$snapshot"; Line 122  open $inpf, "<$snapshot";
122  print "\n>>>>>>>>>>>>> Apply Snapshot\n\n" if ($verbose);  print "\n>>>>>>>>>>>>> Apply Snapshot\n\n" if ($verbose);
123  $res = ApplySnapshot($sconn, $inpf);  $res = ApplySnapshot($sconn, $inpf);
124  close $inpf;  close $inpf;
125  die "\n>>>>>>>>>>>>> ERROR\n" if $res < 0;  if ($res < 0) {
126        unlink $fname;
127        die "\n>>>>>>>>>>>>> ERROR\n";
128    }
129    
130  if ($res > 0)  if ($res > 0)
131  {  {
132          print "Snapshot applied\n" if ($verbose);      print "Snapshot applied\n" if ($verbose);
133          unlink $snapshot unless ($debug);      unlink $snapshot unless ($debug);
134          SyncSync($mconn, $sconn);      SyncSync($mconn, $sconn);
135  }  }
136    
137    unlink $fname;
138  exit(0);  exit(0);
139    
140  ###########################################################################  ###########################################################################
# Line 89  sub SyncSync Line 145  sub SyncSync
145    
146      print "\n>>>>>>>>>>>>> Sync SyncID\n\n" if ($verbose);      print "\n>>>>>>>>>>>>> Sync SyncID\n\n" if ($verbose);
147      print "Get last SyncID from Slave DB\n" if ($verbose);      print "Get last SyncID from Slave DB\n" if ($verbose);
148      $syncid = GetSyncID($sconn);      my $syncid = GetSyncID($sconn);
149      if ($syncid > 0)      if ($syncid > 0)
150      {      {
151          print "Last SyncID applied: $syncid\n" if ($verbose);          print "Last SyncID applied: $syncid\n" if ($verbose);
152          print "Sync SyncID\n" if ($verbose);          print "Sync SyncID\n" if ($verbose);
153    
154          $res = SyncSyncID($mconn, $server, $syncid);          $res = SyncSyncID($mconn, $slaveId, $syncid);
155    
156          print "Succeeded\n" if (($res > 0) && ($verbose));          print "Succeeded\n" if (($res > 0) && ($verbose));
157      }      }
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