bin/metric-postgres-statsdb.rb
#! /usr/bin/env ruby
# frozen_string_literal: false
#
# metric-postgres-statsdb
#
# DESCRIPTION:
#
# This plugin collects postgres database metrics from the pg_stat_database table
#
# OUTPUT:
# metric data
#
# PLATFORMS:
# Linux
#
# DEPENDENCIES:
# gem: sensu-plugin
# gem: pg
#
# USAGE:
# ./metric-postgres-statsdb.rb -u db_user -p db_pass -h db_host -d db
#
# NOTES:
# Requires PSQL `track_counts` `track_io_timing` for some metrics enabled
#
# LICENSE:
# Copyright (c) 2012 Kwarter, Inc <platforms@kwarter.com>
# Author Gilles Devaux <gilles.devaux@gmail.com>
# Released under the same terms as Sensu (the MIT license); see LICENSE
# for details.
#
require 'sensu-plugins-postgres/pgpass'
require 'sensu-plugin/metric/cli'
require 'pg'
require 'socket'
class PostgresStatsDBMetrics < Sensu::Plugin::Metric::CLI::Graphite
option :pgpass,
description: 'Pgpass file',
short: '-f FILE',
long: '--pgpass',
default: ENV['PGPASSFILE'] || "#{ENV['HOME']}/.pgpass"
option :user,
description: 'Postgres User',
short: '-u USER',
long: '--user USER'
option :password,
description: 'Postgres Password',
short: '-p PASS',
long: '--password PASS'
option :hostname,
description: 'Hostname to login to',
short: '-h HOST',
long: '--hostname HOST'
option :port,
description: 'Database port',
short: '-P PORT',
long: '--port PORT'
option :database,
description: 'Database to connect on',
short: '-d DB',
long: '--db DB',
default: 'postgres'
option :all_databases,
description: 'Get stats for all available databases',
short: '-a',
long: '--all-databases',
boolean: true,
default: false
option :scheme,
description: 'Metric naming scheme, text to prepend to $queue_name.$metric',
long: '--scheme SCHEME',
default: "#{Socket.gethostname}.postgresql"
option :timeout,
description: 'Connection timeout (seconds)',
short: '-T TIMEOUT',
long: '--timeout TIMEOUT',
default: nil
include Pgpass
def run
timestamp = Time.now.to_i
pgpass
con = PG.connect(host: config[:hostname],
dbname: config[:database],
user: config[:user],
password: config[:password],
port: config[:port],
connect_timeout: config[:timeout])
query = 'SELECT * FROM pg_stat_database'
params = []
unless config[:all_databases]
query += ' WHERE datname = $1'
params.push config[:database]
end
con.exec_params(query, params) do |result|
result.each do |row|
database = row['datname']
row.each do |key, value|
next if %w[datid datname stats_reset].include?(key)
output "#{config[:scheme]}.statsdb.#{database}.#{key}", value.to_s, timestamp
end
end
end
ok
end
end