/[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 1.10 by dpavlin, Mon Oct 27 00:07:37 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;
# Line 18  use Sys::Hostname; Line 19  use Sys::Hostname;
19    
20  $| = 1;  $| = 1;
21    
22  $result = GetOptions("debug!", "verbose!", "help", "snapshot=s",  my ($debug,$verbose) = (0,0);
23                       "masterhost=s", "slavehost=s",  my ($help,$masterhost,$masterport,$masteruser,$masterpassword,
24                       "masteruser=s", "slaveuser=s",          $slavehost,$slaveport,$slaveuser,$slavepassword);
25                       "masterpassword=s", "slavepassword=s",  my $snapshot = ".__Snapshot";
26                       "masterport=i", "slaveport=i"  
27                       );  my $result = GetOptions(
28            "debug!" => \$debug, "verbose!" => \$verbose, "help" => \$help,
29  my $debug = $opt_debug || 0;          "masterhost=s" => \$masterhost, "masterport=i" => \$masterport,
30  my $verbose = $opt_verbose || 0;          "masteruser=s" => \$masteruser, "masterpassword=s" => \$masterpassword,
31  my $snapshot = $opt_snapshot || ".__Snapshot";          "slavehost=s" => \$slavehost, "slaveport=i" => \$slaveport,
32            "slaveuser=s" => \$slaveuser, "slavepassword=s" => \$slavepassword,
33            "snapshot=s" => \$snapshot,
34            );
35    
36    if (defined($help) || (scalar(@ARGV) < 2)) {
37        print "Usage: $0 [options] masterdb slavedb
38    Options:
39            --masterhost=hostname --masterport=port
40            --masteruser=username --masterpassword=string
41            --snapshot=snapshot
42    ";
43        exit ((scalar(@ARGV) < 2)? 1:0);
44    }
45    
46  $snapshot .= '.' . $$;  $snapshot .= '.' . $$;
47    
48  if (defined($opt_help) || (scalar(@ARGV) < 2)) {  $RServ::quiet = !$verbose;
49      print "Usage: $0 --snapshot=file masterdb slavedb\n";  if ($debug) {
50      print "\t--masterhost=name --masterport=port\n";          $RServ::quiet = 0;
51      print "\t--masteruser=name --masterpassword=string\n";          no warnings 'vars';
52      print "\t--slavehost=name --slaveport=port\n";          $RServ::debug = $debug;
     print "\t--slaveuser=name --slavepassword=string\n";  
     exit ((scalar(@ARGV) < 2)? 1:0);  
53  }  }
54    
55  my $master = $ARGV[0] || "master";  my $master = $ARGV[0] || "master";
56  my $slave = $ARGV[1] || "slave";  my $slave = $ARGV[1] || "slave";
57    my $tables = $#ARGV < 2 ? undef : { map {($_, undef)} @ARGV[2..$#ARGV] };
 $masterhost = $opt_masterhost || hostname;  
 $slavehost = $opt_slavehost || hostname;  
58    
59  # first, let's check if a instance is alrealy running  # first, let's check if a instance is alrealy running
60    
61  $str = $master.'@'.$masterhost.':'.$slave.'@'.$slavehost;  my $str = $master;
62    $str .= '@'.$masterhost if (defined($masterhost));
63    $str .= ':'.$slave;
64    $str .= '@'.$slavehost if (defined($slavehost));
65  my $fname = "/tmp/.lock_rserv-$str";  my $fname = "/tmp/.lock_rserv-$str";
66  if (-e $fname) {  if (-e $fname) {
67      print STDERR "rServ is already running for $str. Remove $fname to override this.\n";          open(PID,$fname) || die "can't open pid file '$fname'";
68      exit(1);          my $pid = <PID>; chomp($pid);
69            close(PID);
70            open(PS,"ps ax |") || die "can't start ps to check for running rServ with pid $pid\n";
71            my $is_running = 0;
72            while(<PS>) {
73                    chomp;
74                    $is_running = 1 if (/^\s*$pid\s/);
75            }
76            close(PS);
77            if ($is_running) {
78                    print STDERR "rServ [$pid] is already running for $str. Remove $fname to override this.\n";
79                    exit(1);
80            } else {
81                    print STDERR "found stale pid file, but no running rServ [$pid], overriding.\n";
82            }
83  }  }
84  open ARQ, ">$fname" || die "Cannot open $fname: $!\n";  open ARQ, ">$fname" || die "Cannot open $fname: $!\n";
85  print ARQ "$$\n";  print ARQ "$$\n";
86  close ARQ;  close ARQ;
87    
88    $SIG{__DIE__} = \&mydie;
89    sub mydie {
90            unlink $fname;
91            print @_;
92            exit 1;
93    }
94    
95    
96  my $minfo = "dbname=$master";  my $minfo = "dbname=$master";
97  $minfo = "$minfo host=$opt_masterhost" if (defined($opt_masterhost));  $minfo = "$minfo host=$masterhost" if (defined($masterhost));
98  $minfo = "$minfo user=$opt_masteruser" if (defined($opt_masteruser));  $minfo = "$minfo port=$masterport" if (defined($masterport));
99  $minfo = "$minfo password=$opt_masterpassword" if (defined($opt_masterpassword));  $minfo = "$minfo user=$masteruser" if (defined($masteruser));
100  $minfo = "$minfo port=$opt_masterport" if (defined($opt_masterport));  $minfo = "$minfo password=$masterpassword" if (defined($masterpassword));
101    
102  my $sinfo = "dbname=$slave";  my $sinfo = "dbname=$slave";
103  $sinfo = "$sinfo host=$opt_slavehost" if (defined($opt_slavehost));  $sinfo = "$sinfo host=$slavehost" if (defined($slavehost));
104  $sinfo = "$sinfo user=$opt_slaveuser" if (defined($opt_slaveuser));  $sinfo = "$sinfo port=$slaveport" if (defined($slaveport));
105  $sinfo = "$sinfo password=$opt_slavepassword" if (defined($opt_slavepassword));  $sinfo = "$sinfo user=$slaveuser" if (defined($slaveuser));
106  $sinfo = "$sinfo port=$opt_slaveport" if (defined($opt_slaveport));  $sinfo = "$sinfo password=$slavepassword" if (defined($slavepassword));
107    
108  print "Master connection is $minfo\n" if ($debug);  print "Master connection is $minfo\n" if ($debug);
109  print "Slave connection is $sinfo\n" if ($debug);  print "Slave connection is $sinfo\n" if ($debug);
110    
111  my $mconn = Pg::connectdb($minfo);  my $mconn = Pg::connectdb($minfo);
112  if ($mconn->status != PGRES_CONNECTION_OK) {  if ($mconn->status != Pg::PGRES_CONNECTION_OK) {
113      print STDERR "Failed opening $minfo\n";      print STDERR "Failed opening $minfo\n";
114      unlink $fname;      unlink $fname;
115      exit 1;      exit 1;
116  }  }
117  my $sconn = Pg::connectdb($sinfo);  my $sconn = Pg::connectdb($sinfo);
118  if ($sconn->status != PGRES_CONNECTION_OK) {  if ($sconn->status != Pg::PGRES_CONNECTION_OK) {
119      print STDERR "Failed opening $sinfo\n";      print STDERR "Failed opening $sinfo\n";
120      unlink $fname;      unlink $fname;
121      exit 1;      exit 1;
122  }  }
123    
124  my $slaveId = GetSlaveId($mconn, $slave, defined($opt_slavehost) ? $opt_slavehost : hostname);  $slavehost = hostname if (! $slavehost);
125    my $slaveId = GetSlaveId($mconn, $slave, $slavehost);
126    
127    die "\n>>>>>>>>>>>>> ERROR: Can't GetSlaveID for $sinfo\n" if (! $slaveId);
128    
129  if ($slaveId < 0) {  if ($slaveId < 0) {
130      unlink $fname;      unlink $fname;
131      die "\n>>>>>>>>>>>>> ERROR\n";      die "\n>>>>>>>>>>>>> ERROR\n";
# Line 94  SyncSync($mconn, $sconn); Line 135  SyncSync($mconn, $sconn);
135  my $outf = new IO::File;  my $outf = new IO::File;
136  open $outf, ">$snapshot";  open $outf, ">$snapshot";
137  print "\n>>>>>>>>>>>>> Prepare Snapshot\n\n" if ($verbose);  print "\n>>>>>>>>>>>>> Prepare Snapshot\n\n" if ($verbose);
138  $res = PrepareSnapshot($mconn, $sconn, $outf, $slaveId);  my $res = PrepareSnapshot($mconn, $sconn, $outf, $slaveId, $tables);
139  close $outf;  close $outf;
140  if ($res < 0) {  if ($res < 0) {
141      unlink $fname;      unlink $fname;
# Line 111  if ($res == 0) Line 152  if ($res == 0)
152  my $inpf = new IO::File;  my $inpf = new IO::File;
153  open $inpf, "<$snapshot";  open $inpf, "<$snapshot";
154  print "\n>>>>>>>>>>>>> Apply Snapshot\n\n" if ($verbose);  print "\n>>>>>>>>>>>>> Apply Snapshot\n\n" if ($verbose);
155  $res = ApplySnapshot($sconn, $inpf);  $res = ApplySnapshot($sconn, $inpf, $tables);
156  close $inpf;  close $inpf;
157  if ($res < 0) {  if ($res < 0) {
158      unlink $fname;      unlink $fname;
# Line 136  sub SyncSync Line 177  sub SyncSync
177    
178      print "\n>>>>>>>>>>>>> Sync SyncID\n\n" if ($verbose);      print "\n>>>>>>>>>>>>> Sync SyncID\n\n" if ($verbose);
179      print "Get last SyncID from Slave DB\n" if ($verbose);      print "Get last SyncID from Slave DB\n" if ($verbose);
180      $syncid = GetSyncID($sconn);      my $syncid = GetSyncID($sconn);
181      if ($syncid > 0)      if ($syncid && $syncid > 0)
182      {      {
183          print "Last SyncID applied: $syncid\n" if ($verbose);          print "Last SyncID applied: $syncid\n" if ($verbose);
184          print "Sync SyncID\n" if ($verbose);          print "Sync SyncID\n" if ($verbose);
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