code: public static void launchIPs(Class<? extends Job> job, String... ips) throws Exception {
      Cloud cloud = new Cloud();
      cloud.publicIPs.addAll(Arrays.asList(ips));
      launch(cloud, job);
    }
docs: The current user is assumed to have ssh access (key-pair, no password) to the remote machines.
  H2O will be deployed to '~/h2o_rsync/'.