bin/metric-postgres-statsbgwriter.rb
#! /usr/bin/env ruby
# frozen_string_literal: false
#
# metric-postgres-statsbgwriter
#
# DESCRIPTION:
#
# This plugin collects postgres database bgwriter metrics
#
# OUTPUT:
# metric data
#
# PLATFORMS:
# Linux
#
# DEPENDENCIES:
# gem: sensu-plugin
# gem: pg
#
# USAGE:
# ./metric-postgres-statsbgwriter.rb -u db_user -p db_pass -h db_host -d db
#
# NOTES:
#
# 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 :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: 'postgres',
user: config[:user],
password: config[:password],
port: config[:port],
connect_timeout: config[:timeout])
request = [
'select checkpoints_timed, checkpoints_req,',
'checkpoint_write_time, checkpoint_sync_time,',
'buffers_checkpoint, buffers_clean,',
'maxwritten_clean, buffers_backend, buffers_backend_fsync',
'buffers_alloc',
'from pg_stat_bgwriter'
]
con.exec(request.join(' ')) do |result|
result.each do |row|
output "#{config[:scheme]}.bgwriter.checkpoints_timed", row['checkpoints_timed'], timestamp
output "#{config[:scheme]}.bgwriter.checkpoints_req", row['checkpoints_req'], timestamp
output "#{config[:scheme]}.bgwriter.checkpoints_write_time", row['checkpoint_write_time'], timestamp
output "#{config[:scheme]}.bgwriter.checkpoints_sync_time", row['checkpoint_sync_time'], timestamp
output "#{config[:scheme]}.bgwriter.buffers_checkpoint", row['buffers_checkpoint'], timestamp
output "#{config[:scheme]}.bgwriter.buffers_clean", row['buffers_clean'], timestamp
output "#{config[:scheme]}.bgwriter.maxwritten_clean", row['maxwritten_clean'], timestamp
output "#{config[:scheme]}.bgwriter.buffers_backend", row['buffers_backend'], timestamp
output "#{config[:scheme]}.bgwriter.buffers_backend_fsync", row['buffers_backend_fsync'], timestamp
output "#{config[:scheme]}.bgwriter.buffers_alloc", row['buffers_alloc'], timestamp
end
end
ok
end
end