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#!@@PERL@@
# -*- cperl -*-
#
# Copyright (C) 2009 Magnus Hagander, Redpill Linpro AB
#
# 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; version 2 dated June,
# 1991.
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA.
=head1 NAME
postgres_xlog - Plugin to monitor the size of the PostgreSQL transaction log
=head1 CONFIGURATION
Configuration is done through libpq environment variables, for example
PGUSER, PGDATABASE, etc. For more information, see L<Munin::Plugin::Pgsql>.
To monitor several instances, link to postgres_<tag>_xlog
The <tag> can be what you want but without "_". It allows you to define several
database configuration.
Example :
[postgres_pg91_*]
env.PGPORT 5432
[postgres_pg92_*]
env.PGPORT 5432
Prior to PostgreSQL version 10, the user this plugin connects to the database
as requires superuser privileges on the database:
ALTER ROLE your_nagios_user SUPERUSER;
Since version 10 the user only requires the pg_monitor role:
ALTER ROLE your_nagios_user NOSUPERUSER;
GRANT pg_monitor TO your_nagios_user;
=head1 SEE ALSO
L<Munin::Plugin::Pgsql>
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=head1 AUTHOR
Magnus Hagander <magnus@hagander.net>, Redpill Linpro AB
=head1 COPYRIGHT/License.
Copyright (c) 2009 Magnus Hagander, Redpill Linpro AB
All rights reserved. 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; version 2
dated June, 1991.
=cut
use strict;
use warnings;
use Munin::Plugin::Pgsql;
my $pg = Munin::Plugin::Pgsql->new(
minversion => 8.1,
title => 'PostgreSQL transaction log',
info => 'PostgreSQL transaction log',
vlabel => 'Log segments',
basequery => [
"SELECT count(*) AS segments FROM pg_ls_waldir() WHERE name ~ '^[0-9A-Z]{24}\$'",
[ 9.6, "SELECT count(*) AS segments FROM pg_ls_dir('pg_xlog') t(fn) WHERE fn ~ '^[0-9A-Z]{24}\$'", ],
],
pivotquery => 1,
configquery => [
"VALUES('segments','WAL segments')",
[8.1, "SELECT 'segments','WAL segments'"],
],
);
$pg->Process();
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