private Integer startTunnelSSH(Instance instance) throws InterruptedException {
Instance tunnelInstance = runningInstances(tunnelResourceId).get(0);
Integer localPort = Double.valueOf(Randoms.number(3000, 10000)).intValue();
CountDownLatch latch = new CountDownLatch(1);
Thread tunnelThread =
new Thread(
() -> {
Process process = null;
try {
Path keyPath = KeyPair.keyFile(tunnelInstance.getKeyName(), env);
String userAndHost = "ubuntu@" + hostName(tunnelInstance);
String portBinding =
Strings.format("{}:{}:22", localPort, instance.getPrivateIpAddress());
List<String> command = tunnelCommand(keyPath, userAndHost, portBinding);
logger.info("tunnel command => {}", String.join(" ", command));
process = new ProcessBuilder().command(command).start();
process.getInputStream().read(); // wait until there is output
latch.countDown();
process.waitFor();
} catch (InterruptedException | IOException e) {
throw new IllegalStateException(e);
} finally {
if (process != null) process.destroy();
}
});
tunnelThread.setDaemon(true);
tunnelThread.start();
latch.await();
return localPort;
}
private void ssh(Instance instance, Integer tunnelPort) throws IOException, InterruptedException {
Path keyPath = KeyPair.keyFile(instance.getKeyName(), env);
String userAndHost;
if (tunnelPort != null) userAndHost = "ubuntu@localhost";
else userAndHost = "ubuntu@" + hostName(instance);
List<String> command = command(keyPath, userAndHost, tunnelPort);
logger.info("command => {}", String.join(" ", command));
Process process = new ProcessBuilder().inheritIO().command(command).start();
process.waitFor();
logger.info("session disconnected");
}