site.rb

  def custom_domain_up_new?
    return false unless custom_domain.present?
    Resolv::DNS.open do |dns|
      dns.timeouts = 2
      # Querying each type of record individually
      # Because ANY query may not return all required types
      {
        Resolv::DNS::Resource::IN::CNAME => /(talkable|curebit)\.com$/,
        Resolv::DNS::Resource::IN::NS => /ns-\d+.awsdns-\d+.com$/,
      }.any? do |type, regex|
        dns.getresources(custom_domain, type).any? do |record|
          record.name.to_s =~ regex
        end
      end
    end
  end