/[rserv]/bin/Replicate
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Revision 1.5 - (hide annotations)
Tue Aug 5 21:10:28 2003 UTC (20 years, 9 months ago) by dpavlin
Branch: MAIN
Changes since 1.4: +4 -1 lines
command line options cleanup and cosistency fix, modification to work
under "use strict;"

1 dpavlin 1.2 #!/usr/bin/perl
2 dpavlin 1.1 # Replicate
3     # Vadim Mikheev, (c) 2000, PostgreSQL Inc.
4    
5     eval '(exit $?0)' && eval 'exec perl -S $0 ${1+"$@"}'
6     & eval 'exec perl -S $0 $argv:q'
7     if 0;
8    
9 dpavlin 1.5 BEGIN {
10     my $basedir = $0; $basedir =~ s#/[^/]+$##;
11     unshift(@INC, "$basedir/../share");
12     }
13 dpavlin 1.1
14     use IO::File;
15     use Getopt::Long;
16     use RServ;
17 dpavlin 1.3 use Sys::Hostname;
18 dpavlin 1.1
19     $| = 1;
20    
21     $result = GetOptions("debug!", "verbose!", "help", "snapshot=s",
22 dpavlin 1.4 "masterhost=s", "slavehost=s",
23     "masteruser=s", "slaveuser=s",
24     "masterpassword=s", "slavepassword=s",
25     "masterport=i", "slaveport=i"
26     );
27 dpavlin 1.1
28     my $debug = $opt_debug || 0;
29     my $verbose = $opt_verbose || 0;
30 dpavlin 1.3 my $snapshot = $opt_snapshot || ".__Snapshot";
31     $snapshot .= '.' . $$;
32 dpavlin 1.1
33     if (defined($opt_help) || (scalar(@ARGV) < 2)) {
34 dpavlin 1.4 print "Usage: $0 --snapshot=file masterdb slavedb\n";
35     print "\t--masterhost=name --masterport=port\n";
36     print "\t--masteruser=name --masterpassword=string\n";
37     print "\t--slavehost=name --slaveport=port\n";
38     print "\t--slaveuser=name --slavepassword=string\n";
39 dpavlin 1.1 exit ((scalar(@ARGV) < 2)? 1:0);
40     }
41    
42     my $master = $ARGV[0] || "master";
43     my $slave = $ARGV[1] || "slave";
44 dpavlin 1.3
45     $masterhost = $opt_masterhost || hostname;
46     $slavehost = $opt_slavehost || hostname;
47    
48     # first, let's check if a instance is alrealy running
49    
50     $str = $master.'@'.$masterhost.':'.$slave.'@'.$slavehost;
51     my $fname = "/tmp/.lock_rserv-$str";
52     if (-e $fname) {
53     print STDERR "rServ is already running for $str. Remove $fname to override this.\n";
54     exit(1);
55     }
56     open ARQ, ">$fname" || die "Cannot open $fname: $!\n";
57     print ARQ "$$\n";
58     close ARQ;
59 dpavlin 1.1
60     my $minfo = "dbname=$master";
61     $minfo = "$minfo host=$opt_masterhost" if (defined($opt_masterhost));
62     $minfo = "$minfo user=$opt_masteruser" if (defined($opt_masteruser));
63     $minfo = "$minfo password=$opt_masterpassword" if (defined($opt_masterpassword));
64 dpavlin 1.4 $minfo = "$minfo port=$opt_masterport" if (defined($opt_masterport));
65 dpavlin 1.1 my $sinfo = "dbname=$slave";
66     $sinfo = "$sinfo host=$opt_slavehost" if (defined($opt_slavehost));
67     $sinfo = "$sinfo user=$opt_slaveuser" if (defined($opt_slaveuser));
68     $sinfo = "$sinfo password=$opt_slavepassword" if (defined($opt_slavepassword));
69 dpavlin 1.4 $sinfo = "$sinfo port=$opt_slaveport" if (defined($opt_slaveport));
70 dpavlin 1.1
71     print "Master connection is $minfo\n" if ($debug);
72     print "Slave connection is $sinfo\n" if ($debug);
73    
74     my $mconn = Pg::connectdb($minfo);
75 dpavlin 1.3 if ($mconn->status != PGRES_CONNECTION_OK) {
76     print STDERR "Failed opening $minfo\n";
77     unlink $fname;
78     exit 1;
79     }
80 dpavlin 1.1 my $sconn = Pg::connectdb($sinfo);
81 dpavlin 1.3 if ($sconn->status != PGRES_CONNECTION_OK) {
82     print STDERR "Failed opening $sinfo\n";
83     unlink $fname;
84     exit 1;
85     }
86 dpavlin 1.1
87 dpavlin 1.3 my $slaveId = GetSlaveId($mconn, $slave, defined($opt_slavehost) ? $opt_slavehost : hostname);
88     if ($slaveId < 0) {
89     unlink $fname;
90     die "\n>>>>>>>>>>>>> ERROR\n";
91     }
92 dpavlin 1.1 SyncSync($mconn, $sconn);
93    
94     my $outf = new IO::File;
95     open $outf, ">$snapshot";
96     print "\n>>>>>>>>>>>>> Prepare Snapshot\n\n" if ($verbose);
97 dpavlin 1.3 $res = PrepareSnapshot($mconn, $sconn, $outf, $slaveId);
98 dpavlin 1.1 close $outf;
99 dpavlin 1.3 if ($res < 0) {
100     unlink $fname;
101     die "\n>>>>>>>>>>>>> ERROR\n";
102     }
103 dpavlin 1.1 if ($res == 0)
104     {
105 dpavlin 1.3 print "\n>>>>>>>>>>>>> DBases are sync-ed\n" if ($verbose);
106     unlink $snapshot unless ($debug);
107     unlink $fname;
108     exit(0);
109 dpavlin 1.1 }
110    
111     my $inpf = new IO::File;
112     open $inpf, "<$snapshot";
113     print "\n>>>>>>>>>>>>> Apply Snapshot\n\n" if ($verbose);
114     $res = ApplySnapshot($sconn, $inpf);
115     close $inpf;
116 dpavlin 1.3 if ($res < 0) {
117     unlink $fname;
118     die "\n>>>>>>>>>>>>> ERROR\n";
119     }
120 dpavlin 1.1
121     if ($res > 0)
122     {
123 dpavlin 1.3 print "Snapshot applied\n" if ($verbose);
124     unlink $snapshot unless ($debug);
125     SyncSync($mconn, $sconn);
126 dpavlin 1.1 }
127    
128 dpavlin 1.3 unlink $fname;
129 dpavlin 1.1 exit(0);
130    
131     ###########################################################################
132    
133     sub SyncSync
134     {
135     ($mconn, $sconn) = @_;
136    
137     print "\n>>>>>>>>>>>>> Sync SyncID\n\n" if ($verbose);
138     print "Get last SyncID from Slave DB\n" if ($verbose);
139     $syncid = GetSyncID($sconn);
140     if ($syncid > 0)
141     {
142     print "Last SyncID applied: $syncid\n" if ($verbose);
143     print "Sync SyncID\n" if ($verbose);
144    
145 dpavlin 1.3 $res = SyncSyncID($mconn, $slaveId, $syncid);
146 dpavlin 1.1
147     print "Succeeded\n" if (($res > 0) && ($verbose));
148     }
149     }

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