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+ GNU GENERAL PUBLIC LICENSE
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+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
--- /dev/null
+#!/usr/bin/perl
+
+# Script: pg_sched.pl
+# Copyright: 26/06/2011: v1.0.0 Glyn Astill <glyn@8kb.co.uk>
+# PostgreSQL 9.0+ (optional Slony-I)
+#
+# This script is a command-line utility to schedule execution of stored
+# functions against databases in a PostgreSQL cluster, with support for
+# selective execution based on the replication role of nodes in Slony-I
+# clusters.
+#
+# The script is designed to be run from cron and has a maximum resolution
+# of 1 minute.
+#
+# This script is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This script is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this script. If not, see <http://www.gnu.org/licenses/>.
+
+use strict;
+use warnings;
+use threads;
+use Time::HiRes qw/gettimeofday/;
+use DBI;
+use sigtrap 'handler' => \&cleanExit, 'HUP', 'INT','ABRT','QUIT','TERM';
+use Getopt::Long qw/GetOptions/;
+Getopt::Long::Configure('no_ignore_case');
+use vars qw{%opt};
+
+use constant false => 0;
+use constant true => 1;
+
+my $g_slony_cluster = "test_replication";
+my $g_dbhost = 'localhost';
+my $g_dbport = 5432;
+my $g_dbname = 'postgres';
+my $g_dbuser = 'pg_sched';
+my $g_dbschema = 'public';
+my $g_dbtable = 'pg_sched';
+my $g_clname = 'auto';
+my $g_sets = 'all';
+my $g_usage = "pg_sched.pl -h <db host> -p <db port> -d <db name> -U <db user> -n <schema> -t <table> -cl <slony clustername> -m <master sets> -l <lock file>
+ -h Hostname of database containing schedule table
+ DEFAULT = $g_dbhost
+ -p Listening port of database containing schedule table
+ DEFAULT = $g_dbport
+ -d Name of database containing schedule table
+ DEFAULT = $g_dbname
+ -U User to connect to databse with, also used as default user for all tasks
+ DEFAULT = $g_dbuser
+ -n Name of schema containing schedule table
+ DEFAULT = $g_dbschema
+ -t Name of schedule table
+ DEFAULT = $g_dbtable
+ -cl Name of slony cluster. 'auto' to autodetect, 'off' to disable
+ DEFAULT = $g_clname
+ -m Comma separated list of slony sets on the master. 'all' for all
+ DEFAULT = $g_sets
+ -l Lockfile used to prevent concurrent execution of tasks.
+ DEFAULT = not used
+";
+
+my @g_databases;
+my $g_origin = false;
+my @g_pronames;
+my $g_errors;
+my $g_lockfile;
+
+die $g_usage unless GetOptions(\%opt, 'host|H=s', 'port|p=i', 'dbname|d=s', 'user|U=s', 'schema|n=s', 'table|t=s', 'lockfile|l=s', 'clname|cl=s', 'msets|m=s');
+
+if (defined($opt{host})) {
+ $g_dbhost = $opt{host};
+}
+if (defined($opt{port})) {
+ $g_dbport = $opt{port};
+}
+if (defined($opt{dbname})) {
+ $g_dbname = $opt{dbname};
+}
+if (defined($opt{user})) {
+ $g_dbuser = $opt{user};
+}
+if (defined($opt{schema})) {
+ $g_dbschema = $opt{schema};
+}
+if (defined($opt{table})) {
+ $g_dbtable = $opt{table};
+}
+if (defined($opt{lockfile})) {
+ $g_lockfile = $opt{lockfile};
+}
+if (defined($opt{clname})) {
+ $g_clname = $opt{clname};
+}
+if (defined($opt{msets})) {
+ $g_sets = $opt{msets};
+}
+
+# If lockfile supplied check if the script is already running
+if (defined($g_lockfile)) {
+ schedLock($g_lockfile, 'lock');
+}
+
+# Get a list of databases in the postgresql cluster
+@g_databases = loadDatabases($g_dbhost, $g_dbport, $g_dbname, $g_dbuser);
+
+# For each database get its replication status then get any work to do
+undef @g_pronames;
+foreach my $target_dbname (@g_databases) {
+ if ($g_clname ne 'off') {
+ $g_origin = checkSlony($g_dbhost, $g_dbport, $target_dbname, $g_dbuser, $g_clname, $g_sets);
+ }
+ else {
+ $g_origin = true;
+ }
+ @g_pronames = (@g_pronames, loadWork($g_dbhost, $g_dbport, $g_dbname, $g_dbuser, $g_dbschema, $g_dbtable, $g_origin, $target_dbname));
+}
+# Do all the work we have collected for all databases
+$g_errors = doWork(\@g_pronames, $g_dbhost, $g_dbport, $g_dbname, $g_dbuser, $g_dbschema, $g_dbtable);
+
+if ($g_errors > 0) {
+ warn ("ERROR: Encountered $g_errors errors processing the schedule\n") if $@;
+}
+
+cleanExit($g_lockfile);
+
+sub cleanExit{
+ my $lockfile = shift;
+
+ if (defined($lockfile)) {
+ schedLock($lockfile, 'unlock');
+ }
+ exit(0);
+}
+
+sub schedLock{
+ my $lockdir = shift;
+ my $op = shift;
+
+ if ($op eq 'lock') {
+ eval {
+ mkdir($lockdir) or die "Can't make directory: $!";
+ };
+ die ("Script already running") if $@;
+ }
+ else {
+ eval {
+ rmdir $lockdir;
+ };
+ die ("unable to remove lock\n") if $@;
+ }
+}
+
+sub loadDatabases{
+ my $dbhost = shift;
+ my $dbport = shift;
+ my $dbname = shift;
+ my $dbuser = shift;
+ my $dsn;
+ my $dbh;
+ my $sth;
+ my $query;
+ my @databases;
+
+ $dsn = "DBI:Pg:dbname=$dbname;host=$dbhost;port=$dbport;";
+ eval {
+ $dbh = DBI->connect($dsn, $dbuser);
+ {
+ $dbh->do("SET application_name = 'pg_sched'");
+
+ $query = "SELECT datname FROM pg_catalog.pg_database WHERE datallowconn AND NOT datistemplate;";
+
+ $sth = $dbh->prepare($query);
+ $sth->execute();
+
+ while (my $databasename = $sth->fetchrow) {
+ push(@databases, $databasename);
+ }
+ }
+ };
+ warn ("ERROR: Loading databaees failed\n") if $@;
+
+ return @databases;
+}
+
+sub checkSlony{
+ my $dbhost = shift;
+ my $dbport = shift;
+ my $target_dbname = shift;
+ my $dbuser = shift;
+ my $clname = shift;
+ my $sets = shift;
+ my $qw_clname;
+ my $dsn;
+ my $dbh;
+ my $sth;
+ my $query;
+ my $local_sets;
+ my $all_sets;
+ my $run_master = false;
+
+ $dsn = "DBI:Pg:dbname=$target_dbname;host=$dbhost;port=$dbport;";
+ eval {
+ $dbh = DBI->connect($dsn, $dbuser);
+ {
+ $dbh->do("SET application_name = 'pg_sched'");
+
+ if ($clname ne 'auto') {
+ $query = "SELECT substr(n.nspname,2) FROM pg_catalog.pg_namespace n WHERE n.nspname = ?;";
+ }
+ else {
+ $query = "SELECT substr(n.nspname,2) FROM pg_catalog.pg_class c JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
+ WHERE c.relname = 'sl_set' AND c.relkind = 'r' GROUP BY n.nspname;";
+ }
+
+ $sth = $dbh->prepare($query);
+
+ if ($clname ne 'auto') {
+ $sth->bind_param(1, "_" . $clname);
+ }
+
+ $sth->execute();
+ $clname = $sth->fetchrow;
+
+ if (defined($clname)) {
+ $qw_clname = $dbh->quote_identifier("_" . $clname);
+
+ $query = "SELECT count(*), sum(CASE WHEN s.set_origin = $qw_clname.getlocalnodeid(?::name) THEN 1 ELSE 0 END)
+ FROM $qw_clname.sl_set s" . (($sets ne 'all')?' WHERE s.set_id = ANY(?::integer[]);':';');
+
+ $sth = $dbh->prepare($query);
+ $sth->bind_param(1, "_" . $clname);
+ if ($sets ne 'all') {
+ $sth->bind_param(2, [ split(',', $sets) ]);
+ }
+
+ $sth->execute();
+
+ ($all_sets, $local_sets) = $sth->fetchrow;
+
+ if (($all_sets // 0) == ($local_sets // 0)) {
+ $run_master = true;
+ }
+ else {
+ $run_master = false;
+ }
+ }
+ else {
+ $run_master = true;
+ }
+ }
+ };
+ warn ("ERROR: Failed reading slony node config\n") if $@;
+
+ return $run_master;
+}
+
+sub loadWork{
+ my $dbhost = shift;
+ my $dbport = shift;
+ my $dbname = shift;
+ my $dbuser = shift;
+ my $dbschema = shift;
+ my $dbtable = shift;
+ my $node_role = shift;
+ my $target_dbname = shift;
+ my $dsn;
+ my $dbh;
+ my $sth;
+ my $query;
+ my $qw_schedname;
+ my @pronames;
+
+ if ($node_role ne 'D') {
+ $dsn = "DBI:Pg:dbname=$dbname;host=$dbhost;port=$dbport;";
+ eval {
+ $dbh = DBI->connect($dsn, $dbuser);
+ {
+ $dbh->do("SET application_name = 'pg_sched'");
+
+ $qw_schedname = $dbh->quote_identifier($dbschema) . '.' . $dbh->quote_identifier($dbtable);
+
+ $query = "SELECT p.id, p.datname, p.pronamespace, p.proname, p.proargs, p.proargtypes, COALESCE(p.usename,current_user), ?::text, p.running FROM $qw_schedname p
+ WHERE p.datname = ? AND (p.enabled = 'A' OR p.enabled = ?)
+ AND (p.last_run IS NULL OR
+ (date_trunc('m', current_timestamp)-date_trunc('m',p.last_run))::interval >= p.frequency)
+ AND (p.isloose OR
+ (extract(EPOCH FROM date_trunc('m', current_timestamp-coalesce(frequency_offset,'0s'::interval)))::integer
+ %extract(EPOCH FROM frequency)::integer) = 0);";
+
+ $sth = $dbh->prepare($query);
+ $sth->bind_param(1, ($node_role?'O':'R'));
+ $sth->bind_param(2, $target_dbname);
+ $sth->bind_param(3, ($node_role?'O':'R'));
+ $sth->execute();
+
+ while (my @prodef = $sth->fetchrow) {
+ push(@pronames, \@prodef);
+ }
+ }
+ };
+ warn ("ERROR: Loading work failed\n") if $@;
+ }
+
+ return @pronames;
+}
+
+sub doWork{
+ my $pronames = shift;
+ my $dbhost = shift;
+ my $dbport = shift;
+ my $dbname = shift;
+ my $dbuser = shift;
+ my $dbschema = shift;
+ my $dbtable = shift;
+ my @workers;
+ my @worker_result;
+ my $bad = 0;
+
+ foreach my $prodef (@$pronames) {
+ my ($t) = threads->new(\&runWorker, $prodef, $dbhost, $dbport, $dbname, $dbuser, $dbschema, $dbtable);
+ push(@workers,$t);
+ }
+ foreach (@workers) {
+ @worker_result = $_->join;
+ if ($worker_result[0] == true) {
+ print("$worker_result[1] [SUCCEEDED]\n");
+ }
+ else {
+ print("$worker_result[1] [FAILED]\n");
+ $bad++;
+ }
+ }
+ return $bad;
+}
+
+sub runWorker{
+ my $prodef = shift;
+ my $dbhost = shift;
+ my $dbport = shift;
+ my $dbname = shift;
+ my $dbuser = shift;
+ my $dbschema = shift;
+ my $dbtable = shift;
+
+ my $dsn;
+ my $dbh;
+ my $sth;
+ my $query;
+ my $qw_schedname;
+ my @result;
+ my $success;
+ my ($g_year, $g_month, $g_day, $g_hour, $g_min, $g_sec) = (localtime(time))[5,4,3,2,1,0];
+ my $timestamp = sprintf ("%02d/%02d/%04d %02d:%02d:%02d", $g_day, $g_month+1, $g_year+1900, $g_hour, $g_min, $g_sec);
+ my $detail = $timestamp . " Schedule: $dbschema.$dbtable Task: id#@$prodef[0] @$prodef[1].@$prodef[2].@$prodef[3](" .
+ (defined(@$prodef[4])?join(', ',@{@$prodef[4]}):'') . ") Rep Role: @$prodef[7] User: @$prodef[6] Result: ";
+ my $typindex = 0;
+ my $start;
+ my $end;
+
+ if (!defined(@$prodef[8]) || !kill(0, @$prodef[8])) {
+ eval {
+
+ eval {
+ $dsn = "DBI:Pg:dbname=$dbname;host=$dbhost;port=$dbport;";
+ $dbh = DBI->connect($dsn, $dbuser);
+ $dbh->do("SET application_name = 'pg_sched'");
+
+ $qw_schedname = $dbh->quote_identifier($dbschema) . '.' . $dbh->quote_identifier($dbtable);
+
+ $query = "UPDATE $qw_schedname SET running = ? WHERE id = ?;";
+ $sth = $dbh->prepare($query);
+ $sth->bind_param(1, $$);
+ $sth->bind_param(2, @$prodef[0]);
+ $sth->execute();
+ $sth->finish;
+ $dbh->disconnect();
+ };
+ if ($@) {
+ warn ("WARNING: pre update of schedule failed\n");
+ }
+
+ $dsn = "DBI:Pg:dbname=@$prodef[1];host=$dbhost;port=$dbport;";
+ $dbh = DBI->connect($dsn, $dbuser);
+ $dbh->do("SET application_name = 'pg_sched'");
+
+ $sth = $dbh->prepare("SET session_authorization = ?");
+ $sth->bind_param(1, @$prodef[6]);
+ $sth->execute();
+
+ $query = "SELECT " . $dbh->quote_identifier(@$prodef[2]) . '.' . $dbh->quote_identifier(@$prodef[3]) . '(';
+ if (defined(@$prodef[4])) {
+ foreach my $arg (@{@$prodef[4]}) {
+ #$query = $query . ($typindex>0?',':'') . $dbh->quote($arg) . '::' . @{@$prodef[5]}[$typindex];
+ $query .= ($typindex>0?',':'') . '?::' . @{@$prodef[5]}[$typindex];
+ $typindex++;
+ }
+ }
+ $query .= ');';
+
+ $sth = $dbh->prepare($query);
+
+ $typindex = 0;
+ if (defined(@$prodef[4])) {
+ foreach my $arg (@{@$prodef[4]}) {
+ $typindex++;
+ $sth->bind_param($typindex, $arg);
+ }
+ }
+ $start = gettimeofday();
+ $sth->execute();
+ $end = gettimeofday();
+
+ while (my @result = $sth->fetchrow) {
+ $success = true;
+ $detail .= ($result[0] // 'NULL') . ' (Timing: ' . sprintf("%.2f sec", $end-$start) . ')';
+ }
+ $sth->finish;
+ $dbh->disconnect();
+
+ eval {
+ $dsn = "DBI:Pg:dbname=$dbname;host=$dbhost;port=$dbport;";
+ $dbh = DBI->connect($dsn, $dbuser);
+ $dbh->do("SET application_name = 'pg_sched'");
+
+ $qw_schedname = $dbh->quote_identifier($dbschema) . '.' . $dbh->quote_identifier($dbtable);
+
+ $query = "UPDATE $qw_schedname SET running = NULL, last_run = ?::timestamp WHERE id = ?;";
+ $sth = $dbh->prepare($query);
+ $sth->bind_param(1, $timestamp);
+ $sth->bind_param(2, @$prodef[0]);
+ $sth->execute();
+ $sth->finish;
+ $dbh->disconnect();
+ };
+ if ($@) {
+ warn ("WARNING: post update of schedule failed\n");
+ }
+ };
+ if ($@) {
+ $success = false;
+ $detail = $@;
+ warn ("WARNING: worker execution failed\n");
+ }
+ }
+ else {
+ $success = false;
+ $detail .= 'already running PID ' . @$prodef[8];
+ }
+
+ return ($success, $detail);
+}
+
projects / slony-i / pg_sched / commitdiff