/[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 1.1 by dpavlin, Wed Dec 20 17:22:35 2000 UTC revision 1.11 by dpavlin, Wed Oct 29 18:00:18 2003 UTC
# Line 1  Line 1 
1  # -*- 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 "@LIBDIR@";  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    my $mserver = 0;
27  my $debug = $opt_debug || 0;  
28  my $verbose = $opt_verbose || 0;  my $result = GetOptions(
29  my $snapshot = $opt_snapshot || "__Snapshot";          "debug!" => \$debug, "verbose!" => \$verbose, "help" => \$help,
30            "masterhost=s" => \$masterhost, "masterport=i" => \$masterport,
31  if (defined($opt_help) || (scalar(@ARGV) < 2)) {          "masteruser=s" => \$masteruser, "masterpassword=s" => \$masterpassword,
32      print "Usage: $0 --snapshot=file --host=name --user=name --password=string masterdb slavedb\n";          "slavehost=s" => \$slavehost, "slaveport=i" => \$slaveport,
33      print "\t--masterhost=name --masteruser=name --masterpassword=string\n";          "slaveuser=s" => \$slaveuser, "slavepassword=s" => \$slavepassword,
34      print "\t--slavehost=name --slaveuser=name --slavepassword=string\n";          "snapshot=s" => \$snapshot,
35            "masterserver=i" => \$mserver,
36            );
37    
38    if (defined($help) || (scalar(@ARGV) < 2)) {
39        print "Usage: $0 [options] masterdb slavedb
40    Options:
41            --masterhost=hostname --masterport=port
42            --masteruser=username --masterpassword=string
43            --snapshot=snapshot
44            [--masterserver=master_number]
45    ";
46      exit ((scalar(@ARGV) < 2)? 1:0);      exit ((scalar(@ARGV) < 2)? 1:0);
47  }  }
48    
49    $snapshot .= '.' . $$;
50    
51    $RServ::quiet = !$verbose;
52    if ($debug) {
53            $RServ::quiet = 0;
54            no warnings 'vars';
55            $RServ::debug = $debug;
56    }
57    
58  my $master = $ARGV[0] || "master";  my $master = $ARGV[0] || "master";
59  my $slave = $ARGV[1] || "slave";  my $slave = $ARGV[1] || "slave";
60  my $server = 0;  my $tables = $#ARGV < 2 ? undef : { map {($_, undef)} @ARGV[2..$#ARGV] };
61    
62    # first, let's check if a instance is alrealy running
63    
64    my $str = $master;
65    $str .= '@'.$masterhost if (defined($masterhost));
66    $str .= ':'.$slave;
67    $str .= '@'.$slavehost if (defined($slavehost));
68    my $fname = "/tmp/.lock_rserv-$str";
69    if (-e $fname) {
70            open(PID,$fname) || die "can't open pid file '$fname'";
71            my $pid = <PID>; chomp($pid);
72            close(PID);
73            open(PS,"ps ax |") || die "can't start ps to check for running rServ with pid $pid\n";
74            my $is_running = 0;
75            while(<PS>) {
76                    chomp;
77                    $is_running = 1 if (/^\s*$pid\s/);
78            }
79            close(PS);
80            if ($is_running) {
81                    print STDERR "rServ [$pid] is already running for $str. Remove $fname to override this.\n";
82                    exit(1);
83            } else {
84                    print STDERR "found stale pid file, but no running rServ [$pid], overriding.\n";
85            }
86    }
87    open ARQ, ">$fname" || die "Cannot open $fname: $!\n";
88    print ARQ "$$\n";
89    close ARQ;
90    
91    $SIG{__DIE__} = \&mydie;
92    sub mydie {
93            unlink $fname;
94            print @_;
95            exit 1;
96    }
97    
98    
99  my $minfo = "dbname=$master";  my $minfo = "dbname=$master";
100  $minfo = "$minfo host=$opt_masterhost" if (defined($opt_masterhost));  $minfo = "$minfo host=$masterhost" if (defined($masterhost));
101  $minfo = "$minfo user=$opt_masteruser" if (defined($opt_masteruser));  $minfo = "$minfo port=$masterport" if (defined($masterport));
102  $minfo = "$minfo password=$opt_masterpassword" if (defined($opt_masterpassword));  $minfo = "$minfo user=$masteruser" if (defined($masteruser));
103    $minfo = "$minfo password=$masterpassword" if (defined($masterpassword));
104    
105  my $sinfo = "dbname=$slave";  my $sinfo = "dbname=$slave";
106  $sinfo = "$sinfo host=$opt_slavehost" if (defined($opt_slavehost));  $sinfo = "$sinfo host=$slavehost" if (defined($slavehost));
107  $sinfo = "$sinfo user=$opt_slaveuser" if (defined($opt_slaveuser));  $sinfo = "$sinfo port=$slaveport" if (defined($slaveport));
108  $sinfo = "$sinfo password=$opt_slavepassword" if (defined($opt_slavepassword));  $sinfo = "$sinfo user=$slaveuser" if (defined($slaveuser));
109    $sinfo = "$sinfo password=$slavepassword" if (defined($slavepassword));
110    
111  print "Master connection is $minfo\n" if ($debug);  print "Master connection is $minfo\n" if ($debug);
112  print "Slave connection is $sinfo\n" if ($debug);  print "Slave connection is $sinfo\n" if ($debug);
113    
114  my $mconn = Pg::connectdb($minfo);  my $mconn = Pg::connectdb($minfo);
115    if ($mconn->status != Pg::PGRES_CONNECTION_OK) {
116        print STDERR "Failed opening $minfo\n";
117        unlink $fname;
118        exit 1;
119    }
120  my $sconn = Pg::connectdb($sinfo);  my $sconn = Pg::connectdb($sinfo);
121    if ($sconn->status != Pg::PGRES_CONNECTION_OK) {
122        print STDERR "Failed opening $sinfo\n";
123        unlink $fname;
124        exit 1;
125    }
126    
127    $slavehost = hostname if (! $slavehost);
128    my $slaveId = GetSlaveId($mconn, $slave, $slavehost);
129    
130    die "\n>>>>>>>>>>>>> ERROR: Can't GetSlaveID for $sinfo\n" if (! $slaveId);
131    
132    if ($slaveId < 0) {
133        unlink $fname;
134        die "\n>>>>>>>>>>>>> ERROR: GetSlaveID returned $slaveId < 0\n";
135    }
136  SyncSync($mconn, $sconn);  SyncSync($mconn, $sconn);
137    
138  my $outf = new IO::File;  my $outf = new IO::File;
139  open $outf, ">$snapshot";  open $outf, ">$snapshot";
140  print "\n>>>>>>>>>>>>> Prepare Snapshot\n\n" if ($verbose);  print "\n>>>>>>>>>>>>> Prepare Snapshot\n\n" if ($verbose);
141  $res = PrepareSnapshot($mconn, $outf, $server);  my $res = PrepareSnapshot($mconn, $sconn, $outf, $mserver, $slaveId, $tables);
142  close $outf;  close $outf;
143  die "\n>>>>>>>>>>>>> ERROR\n" if $res < 0;  if ($res < 0) {
144        unlink $fname;
145        die "\n>>>>>>>>>>>>> ERROR\n";
146    }
147  if ($res == 0)  if ($res == 0)
148  {  {
149          print "\n>>>>>>>>>>>>> DBases are sync-ed\n" if ($verbose);      print "\n>>>>>>>>>>>>> DBases are sync-ed\n" if ($verbose);
150          exit(0);      unlink $snapshot unless ($debug);
151        unlink $fname;
152        exit(0);
153  }  }
154    
155  my $inpf = new IO::File;  my $inpf = new IO::File;
156  open $inpf, "<$snapshot";  open $inpf, "<$snapshot";
157  print "\n>>>>>>>>>>>>> Apply Snapshot\n\n" if ($verbose);  print "\n>>>>>>>>>>>>> Apply Snapshot\n\n" if ($verbose);
158  $res = ApplySnapshot($sconn, $inpf);  $res = ApplySnapshot($sconn, $inpf, $tables);
159  close $inpf;  close $inpf;
160  die "\n>>>>>>>>>>>>> ERROR\n" if $res < 0;  if ($res < 0) {
161        unlink $fname;
162        die "\n>>>>>>>>>>>>> ERROR\n";
163    }
164    
165  if ($res > 0)  if ($res > 0)
166  {  {
167          print "Snapshot applied\n" if ($verbose);      print "Snapshot applied\n" if ($verbose);
168          unlink $snapshot unless ($debug);      unlink $snapshot unless ($debug);
169          SyncSync($mconn, $sconn);      SyncSync($mconn, $sconn);
170  }  }
171    
172    unlink $fname;
173  exit(0);  exit(0);
174    
175  ###########################################################################  ###########################################################################
# Line 87  sub SyncSync Line 180  sub SyncSync
180    
181      print "\n>>>>>>>>>>>>> Sync SyncID\n\n" if ($verbose);      print "\n>>>>>>>>>>>>> Sync SyncID\n\n" if ($verbose);
182      print "Get last SyncID from Slave DB\n" if ($verbose);      print "Get last SyncID from Slave DB\n" if ($verbose);
183      $syncid = GetSyncID($sconn);      my $syncid = GetSyncID($sconn);
184      if ($syncid > 0)      if ($syncid && $syncid > 0)
185      {      {
186          print "Last SyncID applied: $syncid\n" if ($verbose);          print "Last SyncID applied: $syncid\n" if ($verbose);
187          print "Sync SyncID\n" if ($verbose);          print "Sync SyncID\n" if ($verbose);
188    
189          $res = SyncSyncID($mconn, $server, $syncid);          $res = SyncSyncID($mconn, $slaveId, $syncid);
190    
191          print "Succeeded\n" if (($res > 0) && ($verbose));          print "Succeeded\n" if (($res > 0) && ($verbose));
192      }      }
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