lib/arborist/monitor/snmp/swap.rb
author Mahlon E. Smith <mahlon@martini.nu>
Wed, 07 Sep 2016 15:23:53 -0700
changeset 5 309727e262af
parent 4 e6eb11b1e00d
permissions -rw-r--r--
Added tag v0.3.0 for changeset e6eb11b1e00d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
4
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
     1
# -*- ruby -*-
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
     2
# vim: set noet nosta sw=4 ts=4 :
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
     3
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
     4
require 'arborist/monitor/snmp' unless defined?( Arborist::Monitor::SNMP )
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
     5
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
     6
# SNMP swap usage checks.
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
     7
# Returns swap used in a 'swap_in_use' attribute.
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
     8
#
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
     9
class Arborist::Monitor::SNMP::Swap
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    10
	include Arborist::Monitor::SNMP
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    11
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    12
	extend Loggability
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    13
	log_to :arborist
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    14
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    15
	# Global defaults for instances of this monitor
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    16
	#
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    17
	DEFAULT_OPTIONS = {
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    18
		error_at: 95, # in percent full
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    19
	}
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    20
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    21
	# OIDS for discovering memory usage.
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    22
	#
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    23
	MEMORY = {
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    24
		swap_total: '1.3.6.1.4.1.2021.4.3.0',
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    25
		swap_avail: '1.3.6.1.4.1.2021.4.4.0',
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    26
	}
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    27
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    28
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    29
	### This monitor is complex enough to require creating an instance from the caller.
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    30
	### Provide a friendlier error message the class was provided to exec() directly.
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    31
	###
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    32
	def self::run( nodes )
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    33
		return new.run( nodes )
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    34
	end
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    35
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    36
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    37
	### Create a new instance of this monitor.
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    38
	###
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    39
	def initialize( options=DEFAULT_OPTIONS )
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    40
		options = DEFAULT_OPTIONS.merge( options || {} )
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    41
		options.each do |name, value|
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    42
			self.public_send( "#{name.to_s}=", value )
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    43
		end
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    44
	end
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    45
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    46
	# Set an error if used swap exceeds this percentage.
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    47
	attr_accessor :error_at
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    48
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    49
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    50
	### Perform the monitoring checks.
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    51
	###
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    52
	def run( nodes )
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    53
		super do |snmp, host|
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    54
			self.gather_swap( snmp, host )
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    55
		end
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    56
	end
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    57
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    58
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    59
	#########
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    60
	protected
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    61
	#########
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    62
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    63
	### Collect used swap information for +host+ from an existing (and
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    64
	### open) +snmp+ connection.
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    65
	###
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    66
	def gather_swap( snmp, host )
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    67
		self.log.debug "Getting used swap for: %s" % [ host ]
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    68
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    69
		swap_total = snmp.get( SNMP::ObjectId.new(MEMORY[:swap_total]) ).varbind_list.first.value.to_f
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    70
		swap_avail = snmp.get( SNMP::ObjectId.new(MEMORY[:swap_avail]) ).varbind_list.first.value.to_f
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    71
		swap_in_use  = (( swap_avail.to_f / swap_total * 100 ) - 100 ).abs
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    72
		self.log.debug "  Swap in use on %s: %0.1f%%" % [ host, swap_in_use ]
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    73
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    74
		config = @identifiers[ host ].last || {}
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    75
		if swap_in_use >= ( config['error_at'] || self.error_at )
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    76
			@results[ host ] = {
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    77
				error: "%0.1f%% swap in use" % [ swap_in_use ],
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    78
				swap_in_use: swap_avail
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    79
			}
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    80
		else
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    81
			@results[ host ] = { swap_in_use: swap_in_use }
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    82
		end
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    83
	end
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    84
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    85
end # class Arborist::Monitor::SNMP::Swap
e6eb11b1e00d Refactor. Move all SNMP "sections" to their own classes.
Mahlon E. Smith <mahlon@martini.nu>
parents:
diff changeset
    86