Update ELB SSL Certificate

update_elb_certificate.rb

require 'aws-sdk'

NEW_CERT_NAME = 'xxx'

REGIONS  = AWS::EC2.new.regions.map(&:name)
NEW_CERT = AWS::IAM.new.server_certificates[NEW_CERT_NAME]

REGIONS.each do |r|
  puts "# region: #{r}"
  elb = AWS::ELB.new(region: r)
  elb.load_balancers.each do |lb|
    puts "## #{lb.name} (#{lb.dns_name})"

    lb.listeners.each do |l|
      next unless l.protocol == :https || l.server_certificate

      puts "- [begin to udpate ELB certificate] at #{Time.now}"
      l.server_certificate = NEW_CERT                                                                                                                                                                                                 
      puts "- [finished] at #{Time.now}"
    end
  end
end