robust net/ssh connection attempt

gistfile1.rb

tries, connection = 0, nil
print "connecting to #{dns_name}"
until connection || ((tries += 1) > 10)
  begin
    Timeout::timeout(5) do
      begin
        connection = Net::SSH.start(dns_name, user_name, ssh_options)           
      rescue Exception => e
        connection = nil
      end
    end
  rescue Timeout::Error => e
  end
end
  
if connection
  begin
    puts "success"
    connection.exec! "uptime"
  ensure
    connection.close
  end
else
  puts "failed!"
end