GSA snmp monitoring script

gsaMon.rb

#!/usr/bin/env ruby
# Author:       Olivier Robert
# Email:        olivier.robert@ext.europarl.europa.eu
# Date:         02/05/2013
# Version:      0.0.1
# Usage:        gsaMon <snmp agent>
# 
# Description:
# snmp query to a GSA appliance:
# => system.temperature.temperatureHealth Integer, Read-only  Temperature status:
# => system.gsaDisk.diskHealth  Integer, Read-only, Disk status:
# => system.machine.machineHealth Integer, Read-only  Machine status:
# Possible status:
# 0 = Green (OK)
# 1 = Yellow (Warning)
# 2 = Red (Critical Warning)
#
# !!! Important !!!
# For this script to work you'll need to copy the google supplied MIBs to /usr/local/share/snmp/mibs/ on your solaris host
# https://developers.google.com/search-appliance/documentation/50/help_gsa/admin_snmp

require 'logger'

class GsaMon
  # !!! class uses external snmp tools commands !!!
  def initialize(snmpAgent)
    @agent = snmpAgent
  end
  
  # Displays all the search appliance MIB contents
  def showAvailableOIDs
    return %x[snmpwalk -m +GSA-MIB -v 2c -c public -t 5 #{@agent} google]
  end

  # Search appliance status
  def checkStatus
    # checks status for machineHealth, diskHealth and temperatureHealth
    # returns true or false

    # Possible status
    statusValues = {0 => "Green (OK)", 1 => "Yellow (Warning)", 2 => "Red (Critical Warning)"}
    # status
    @gsaStatus = {:machine => 0, :disk => 0, :temp => 0}
    # oids checked
    oids = {:machine => "GSA-MIB::machineHealth.0", :disk => "GSA-MIB::diskHealth.0", :temp => "GSA-MIB::temperatureHealth.0"}
    result = true

    oids.each do |k,v|
      gsaStatusString = %x[snmpget -m +GSA-MIB -v 2c -c public -t 15 #{@agent} #{v}]
      if $?.success?
        # check for returned value in parenthesis
        m = /\((\d)\)/.match(gsaStatusString)
        if m
          @gsaStatus[k] = statusValues[m[1].to_i]
          result = false if m[1].to_i > 0
        end
      else
        @gsaStatus[k] = "snmp query failed!"
        result = false
      end
    end

    return result
  end #checkStatus

  def getStatus
    # should be called after checkStatus
    statusString = ""
    @gsaStatus.each do |k,v|
      statusString += "#{k.to_s}: #{v.to_s} "
    end

    return statusString
  end
end #class

if __FILE__ == $0

  if !ARGV[0]
    puts "Please supply a snmp agent: ./gsaMon snmp_agent_to_monitor"
    exit 1
  else
    agent = ARGV[0]
  end

  ITOGROUP = "ITO-APPLI-EXPERT"
  logPath = "/LOG/APPLI/gsa/#{agent}.log"
  
  log = Logger.new(logPath, 'daily')
  #log.level = Logger::DEBUG
  log.level = Logger::INFO

  log.debug "Initiating snmp query for agent #{agent}"

  g = GsaMon.new(agent)
  if !g.checkStatus
    m = /snmp query failed/.match(g.getStatus)
    if m
      issue = "Could not communicate with snmp agent #{agent}: timeout or connection issue!"
      log.error "#{issue}"
      #%x[pecawto gsaMon.rb APPLI GSA gsaMon #{issue}]
      exit 2
    else
      log.debug "oops, lost polarized plates ... virtual gravity lost ;-)"
      log.error "#{agent} status: #{g.getStatus}"
      log.error "Log on to http://#{agent}:8000/EnterpriseController from eici{L|B}UP03{1|2} (#{ITOGROUP})"
      log.error "If necessary, open a case with Google https://google.secure.force.com/ (#{ITOGROUP})"

      #%x[pecawto gsaMon.rb APPLI GSA gsaMon #{g.getStatus}]
      log.error "NSM alert triggered."
      
      exit 3
    end
  else
    log.info "#{agent} status: #{g.getStatus}"
  end

  log.debug "Check done. Waiting for tectonics plates to shift ... Good bye!"
  log.close
end