Dump status from Nagios.

nagiosdump.rb

require 'rubygems'
require 'nokogiri'
require 'open-uri'

def get_nagios_status(server_host, username = 'monitor', password = 'monitor')
  doc = Nokogiri::HTML(open("http://#{server_host}/nagios/cgi-bin/status.cgi?servicestatustypes=28&hoststatustypes=15", :http_basic_authentication => [username, password]))

  hosts = []

  last_title = nil
  last_link = nil
  doc.css('table.status>tr').each do |row|
    title_row = row.css('a[title]')[0]
    next if title_row.nil? && last_title.nil?
  
    next if !row.xpath("td[1]").attr('colspan').nil?
  
    if title_row
      host =  title_row.attr('title')
      link = title_row.attr('href')
    else
      host = last_title
      link = last_link
    end
    
    service = row.xpath('td[2]')[0].content.strip
    status = row.xpath('td[3]')[0].content
    message = row.xpath('td[7]')[0].content
    
    last_title = host
    last_link = link
  
    hosts << {:hostname => host, :service => service, :status => status, :link => link,:message => message}
  end
  
  hosts
end

if ARGV.length == 0
  puts "Usage: #{__FILE__} <server>"
  exit 1
end

server = ARGV[0]

status = get_nagios_status(server)
puts "Critical: #{status.reduce(0) {|count, status| count = if status[:status] == 'CRITICAL' then count + 1 else count end}}"
puts "Warning: #{status.reduce(0) {|count, status| count = if status[:status] == 'WARNING' then count + 1 else count end}}"

status.each do |host|
  puts "Host = #{host[:hostname]}, service = #{host[:service]}, status = #{host[:status]}, message = #{host[:message]}"
end