/[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 1.5 by dpavlin, Tue Aug 5 21:10:28 2003 UTC revision 1.16 by dpavlin, Sun Nov 2 11:30:23 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 11  BEGIN { Line 11  BEGIN {
11          unshift(@INC, "$basedir/../share");          unshift(@INC, "$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;
 use Sys::Hostname;  
18    
19  $| = 1;  $| = 1;
20    
21  $result = GetOptions("debug!", "verbose!", "help", "snapshot=s",  #my ($debug,$verbose) = (0,0);
22                       "masterhost=s", "slavehost=s",  my ($help,$masterhost,$masterport,$masteruser,$masterpassword,
23                       "masteruser=s", "slaveuser=s",          $slavehost,$slaveport,$slaveuser,$slavepassword);
24                       "masterpassword=s", "slavepassword=s",  my $snapshot = ".__Snapshot";
25                       "masterport=i", "slaveport=i"  my $multiplemaster = 0;
26                       );  
27    my $result = GetOptions(
28  my $debug = $opt_debug || 0;          "debug!" => \$debug, "verbose!" => \$verbose, "help" => \$help,
29  my $verbose = $opt_verbose || 0;          "masterhost=s" => \$masterhost, "masterport=i" => \$masterport,
30  my $snapshot = $opt_snapshot || ".__Snapshot";          "masteruser=s" => \$masteruser, "masterpassword=s" => \$masterpassword,
31  $snapshot .= '.' . $$;          "slavehost=s" => \$slavehost, "slaveport=i" => \$slaveport,
32            "slaveuser=s" => \$slaveuser, "slavepassword=s" => \$slavepassword,
33  if (defined($opt_help) || (scalar(@ARGV) < 2)) {          "snapshot=s" => \$snapshot,
34      print "Usage: $0 --snapshot=file masterdb slavedb\n";          "multiplemaster" => \$multiplemaster,
35      print "\t--masterhost=name --masterport=port\n";          );
36      print "\t--masteruser=name --masterpassword=string\n";  
37      print "\t--slavehost=name --slaveport=port\n";  if (defined($help) || (scalar(@ARGV) < 2)) {
38      print "\t--slaveuser=name --slavepassword=string\n";      print "Usage: $0 [options] masterdb slavedb
39    Options:
40            --masterhost=hostname --masterport=port
41            --masteruser=username --masterpassword=string
42            --snapshot=snapshot
43            [--masterserver=master_number]
44    ";
45      exit ((scalar(@ARGV) < 2)? 1:0);      exit ((scalar(@ARGV) < 2)? 1:0);
46  }  }
47    
48    $snapshot .= '.' . $$;
49    
50    $RServ::quiet = !$verbose;
51    #if ($debug) {
52    #print "## q:$RServ::quiet v:$RServ::verbose d:$RServ::debug\n";
53    #       $RServ::quiet = 0;
54    #       no warnings 'vars';
55    #       $RServ::debug = $debug;
56    #print "## q:$RServ::quiet v:$RServ::verbose d:$RServ::debug\n";
57    #}
58    
59  my $master = $ARGV[0] || "master";  my $master = $ARGV[0] || "master";
60  my $slave = $ARGV[1] || "slave";  my $slave = $ARGV[1] || "slave";
61    my $tables = $#ARGV < 2 ? undef : { map {($_, undef)} @ARGV[2..$#ARGV] };
 $masterhost = $opt_masterhost || hostname;  
 $slavehost = $opt_slavehost || hostname;  
62    
63  # first, let's check if a instance is alrealy running  # first, let's check if a instance is alrealy running
64    
65  $str = $master.'@'.$masterhost.':'.$slave.'@'.$slavehost;  my $str = $master;
66    $str .= '@'.$masterhost if (defined($masterhost));
67    $str .= ':'.$slave;
68    $str .= '@'.$slavehost if (defined($slavehost));
69  my $fname = "/tmp/.lock_rserv-$str";  my $fname = "/tmp/.lock_rserv-$str";
70  if (-e $fname) {  if (-e $fname) {
71      print STDERR "rServ is already running for $str. Remove $fname to override this.\n";          open(PID,$fname) || die "can't open pid file '$fname'";
72      exit(1);          my $pid = <PID>; chomp($pid);
73            close(PID);
74            open(PS,"ps ax |") || die "can't start ps to check for running rServ with pid $pid\n";
75            my $is_running = 0;
76            while(<PS>) {
77                    chomp;
78                    $is_running = 1 if (/^\s*$pid\s/);
79            }
80            close(PS);
81            if ($is_running) {
82                    print STDERR "rServ [$pid] is already running for $str. Remove $fname to override this.\n";
83                    exit(1);
84            } else {
85                    print STDERR "found stale pid file, but no running rServ [$pid], overriding.\n";
86            }
87  }  }
88  open ARQ, ">$fname" || die "Cannot open $fname: $!\n";  open ARQ, ">$fname" || die "Cannot open $fname: $!\n";
89  print ARQ "$$\n";  print ARQ "$$\n";
90  close ARQ;  close ARQ;
91    
92  my $minfo = "dbname=$master";  $SIG{__DIE__} = \&mydie;
93  $minfo = "$minfo host=$opt_masterhost" if (defined($opt_masterhost));  sub mydie {
94  $minfo = "$minfo user=$opt_masteruser" if (defined($opt_masteruser));          unlink $fname;
95  $minfo = "$minfo password=$opt_masterpassword" if (defined($opt_masterpassword));          print @_;
96  $minfo = "$minfo port=$opt_masterport" if (defined($opt_masterport));          exit 1;
97  my $sinfo = "dbname=$slave";  }
98  $sinfo = "$sinfo host=$opt_slavehost" if (defined($opt_slavehost));  
99  $sinfo = "$sinfo user=$opt_slaveuser" if (defined($opt_slaveuser));  my $minfo = MkInfo($master,$masterhost,$masterport,$masteruser,$masterpassword);
100  $sinfo = "$sinfo password=$opt_slavepassword" if (defined($opt_slavepassword));  my $sinfo = MkInfo($slave,$slavehost,$slaveport,$slaveuser,$slavepassword);
 $sinfo = "$sinfo port=$opt_slaveport" if (defined($opt_slaveport));  
101    
102  print "Master connection is $minfo\n" if ($debug);  print "Master connection is $minfo\n" if ($debug);
103  print "Slave connection is $sinfo\n" if ($debug);  print "Slave connection is $sinfo\n" if ($debug);
104    
105  my $mconn = Pg::connectdb($minfo);  my $mconn = Pg::connectdb($minfo);
106  if ($mconn->status != PGRES_CONNECTION_OK) {  if ($mconn->status != Pg::PGRES_CONNECTION_OK) {
107      print STDERR "Failed opening $minfo\n";      print STDERR "Failed opening $minfo\n";
108      unlink $fname;      unlink $fname;
109      exit 1;      exit 1;
110  }  }
111  my $sconn = Pg::connectdb($sinfo);  my $sconn = Pg::connectdb($sinfo);
112  if ($sconn->status != PGRES_CONNECTION_OK) {  if ($sconn->status != Pg::PGRES_CONNECTION_OK) {
113      print STDERR "Failed opening $sinfo\n";      print STDERR "Failed opening $sinfo\n";
114      unlink $fname;      unlink $fname;
115      exit 1;      exit 1;
116  }  }
117    
118  my $slaveId = GetSlaveId($mconn, $slave, defined($opt_slavehost) ? $opt_slavehost : hostname);  $slavehost = 'localhost' if (! $slavehost);
119    $masterhost = 'localhost' if (! $masterhost);
120    
121    my $slaveId = GetServerId($mconn, $slave, $slavehost);
122    
123    die "\n>>>>>>>>>>>>> ERROR: Can't GetServerId for $sinfo\n" if (! defined($slaveId));
124    
125  if ($slaveId < 0) {  if ($slaveId < 0) {
126      unlink $fname;      unlink $fname;
127      die "\n>>>>>>>>>>>>> ERROR\n";      die "\n>>>>>>>>>>>>> ERROR: GetServerId returned $slaveId < 0\n";
128  }  }
129  SyncSync($mconn, $sconn);  SyncSync($mconn, $sconn);
130    
131    my $masterId = 0;
132    if ($multiplemaster || $slaveId == 0) {
133            $masterId = GetServerId($sconn, $master, $masterhost);
134    
135            die "\n>>>>>>>>>>>>> ERROR: Can't GetServerId for $sinfo\n" if (! defined($masterId));
136    
137            if ($masterId < 0) {
138                unlink $fname;
139                die "\n>>>>>>>>>>>>> ERROR: GetServerId returned $masterId < 0\n";
140            }
141            SyncSync($sconn, $mconn);
142    }
143    
144    print "Using snapshot file: $snapshot\n" if ($debug);
145    
146  my $outf = new IO::File;  my $outf = new IO::File;
147  open $outf, ">$snapshot";  open $outf, ">$snapshot";
148  print "\n>>>>>>>>>>>>> Prepare Snapshot\n\n" if ($verbose);  print "\n>>>>>>>>>>>>> Prepare Snapshot\n\n" if ($verbose);
149  $res = PrepareSnapshot($mconn, $sconn, $outf, $slaveId);  print "master id: $masterId slave id: $slaveId\n" if ($debug);
150    my $res = PrepareSnapshot($mconn, $sconn, $outf, $masterId, $slaveId, $tables);
151  close $outf;  close $outf;
152  if ($res < 0) {  if ($res < 0) {
153      unlink $fname;      unlink $fname;
# Line 111  if ($res == 0) Line 164  if ($res == 0)
164  my $inpf = new IO::File;  my $inpf = new IO::File;
165  open $inpf, "<$snapshot";  open $inpf, "<$snapshot";
166  print "\n>>>>>>>>>>>>> Apply Snapshot\n\n" if ($verbose);  print "\n>>>>>>>>>>>>> Apply Snapshot\n\n" if ($verbose);
167  $res = ApplySnapshot($sconn, $inpf);  $res = ApplySnapshot($sconn, $inpf, $tables);
168  close $inpf;  close $inpf;
169  if ($res < 0) {  if ($res < 0) {
170      unlink $fname;      unlink $fname;
# Line 136  sub SyncSync Line 189  sub SyncSync
189    
190      print "\n>>>>>>>>>>>>> Sync SyncID\n\n" if ($verbose);      print "\n>>>>>>>>>>>>> Sync SyncID\n\n" if ($verbose);
191      print "Get last SyncID from Slave DB\n" if ($verbose);      print "Get last SyncID from Slave DB\n" if ($verbose);
192      $syncid = GetSyncID($sconn);      my $syncid = GetSyncID($sconn);
193      if ($syncid > 0)      if ($syncid && $syncid > 0)
194      {      {
195          print "Last SyncID applied: $syncid\n" if ($verbose);          print "Last SyncID applied: $syncid\n" if ($verbose);
196          print "Sync SyncID\n" if ($verbose);          print "Sync SyncID\n" if ($verbose);
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