bin/metrics-snmp-bulk.rb
#!/usr/bin/env ruby
# frozen_string_literal: false
# SNMP Bulk Metrics
# ===
#
# This is a script to 'bulk walk' an SNMP OID value, collecting metrics
#
# DEPENDENCIES:
# gem: sensu-plugin
# gem: snmp
#
# USAGE:
#
# snmp-bulk-metrics -h host -C community -O oid1,oid2...
#
# LICENSE:
# Copyright 2014 Matthew Richardson <m.richardson@ed.ac.uk>
# Based on snmp-metrics.rb by Double Negative Limited
#
# Released under the same terms as Sensu (the MIT license); see LICENSE
# for details.
require 'sensu-plugin/metric/cli'
require 'snmp'
# Class that collects and outputs SNMP metrics in graphite format
class SNMPGraphite < Sensu::Plugin::Metric::CLI::Graphite
option :host,
short: '-h host',
boolean: true,
default: '127.0.0.1',
required: true
option :port,
short: '-P port',
long: '--port PORT',
default: '161'
option :community,
short: '-C snmp community',
boolean: true,
default: 'public'
option :objectid,
short: '-O OID[,OID,OID...]',
description: 'comma separated list of OIDs to bulkwalk',
required: true
option :prefix,
short: '-p prefix',
description: 'prefix to attach to graphite path'
option :suffix,
short: '-s suffix',
description: 'suffix to attach to graphite path'
option :snmp_version,
short: '-v version',
description: 'SNMP version to use (SNMPv1, SNMPv2c (default))',
default: 'SNMPv2c'
option :graphite,
short: '-g',
description: 'Replace dots with underscores in hostname',
boolean: true
option :maxrepeat,
short: '-m maxrepeat',
description: 'Number of iterations to perform on repeating variables (defaults to 10)',
default: 10
option :nonrepeat,
short: '-n non-repeaters',
description: 'Number of supplied OIDs that should not be iterated over (defaults to 0)',
default: 0
option :mibdir,
short: '-d mibdir',
description: 'Full path to custom MIB directory.'
option :mibs,
short: '-l mib[,mib,mib...]',
description: 'Custom MIBs to load (from custom mib path).',
default: ''
option :timeout,
short: '-t timeout (seconds) (defaults to 5)',
default: 5
def run
oids = config[:objectid].split(',')
mibs = config[:mibs].split(',')
begin
manager = SNMP::Manager.new(host: config[:host].to_s,
port: config[:port].to_i,
community: config[:community].to_s,
version: config[:snmp_version].to_sym,
timeout: config[:timeout].to_i)
if config[:mibdir] && !mibs.empty?
manager.load_modules(mibs, config[:mibdir])
end
response = manager.get_bulk(config[:nonrepeat].to_i,
config[:maxrepeat].to_i,
oids)
rescue SNMP::RequestTimeout
unknown "#{config[:host]} not responding"
rescue StandardError => e
unknown "An unknown error occured: #{e.inspect}"
end
config[:host] = config[:host].tr('.', '_') if config[:graphite]
response.each_varbind do |vb|
name = vb.oid
name = name.to_s.tr('.', '_') if config[:graphite]
begin
metric_string = config[:host]
metric_string = "#{config[:prefix]}.#{metric_string}" if config[:prefix]
metric_string += ".#{config[:suffix]}" if config[:suffix]
metric_string += ".#{name}"
output metric_string, vb.value.to_f
rescue NameError # rubocop:disable Lint/SuppressedException
# Rescue as some values may fail to cast to float
end
end
manager.close
ok
end
end