Compare Route53 with Ground Truth DNS

checkdns.rb

require 'net/dns'
require 'route53'

def go(recs, type)
  recs.each do |record|
    rslv = Net::DNS::Resolver.start(record.name, type).answer

    found = true

    rslv.each do |answer|
      found &&= record.values.select {|v| v.to_s == answer.value.to_s }.size != 0
    end
    if !found
      puts "#{record.name}:"
      puts "\t#{rslv.map(&:value).join("\n\t")}"
      puts "\t\tvs"
      puts "\t#{record.values.join("\n\t")}"
    end
  end
end

r53 = Route53::Connection.new(ENV["AWS_ACCESS_KEY_ID"], ENV["AWS_SECRET_KEY"])

cnames = r53.get_zones(ARGV.first).first.get_records("CNAME")
arecs = r53.get_zones(ARGV.first).first.get_records("A")
nsrecs = r53.get_zones(ARGV.first).first.get_records("NS")
mxrecs = r53.get_zones(ARGV.first).first.get_records("MX")

go(nsrecs, Net::DNS::NS)
go(cnames, Net::DNS::CNAME)
go(arecs, Net::DNS::A)
go(mxrecs, Net::DNS::MX)