尝试这样的事情。它接受要连接的服务器列表。它将每个中间连接隧道连接到最后一个服务器。我没有使用超过 2 台服务器进行测试，但它应该可以工作。这个答案改编自 overthere 项目并用 groovy 编写。你应该只需要导入来让它在 groovyconsole 中工作。
@Grab(group='net.schmizz', module='sshj', version='0.8.1')
@Grab(group='org.bouncycastle', module='bcprov-jdk16', version='1.46')
//the sequence of hosts that the connections will be made through
def hosts = ["server1", "server2"]
//the starting port for local port forwarding
def startPort = 2222
//username for connecting to all servers
def username = 'user'
def pw = 'pass'
//--------------------------------------------------------------------------//
final TunnelPortManager PORT_MANAGER = new TunnelPortManager()
//list of all active port forwarders
List<PortForwarder> portForwarders = []
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
/**
* Established the actual port forwarder
*/
class PortForwarder extends Thread implements Closeable {
private final SSHClient sshClient;
private final InetSocketAddress remoteAddress;
private final ServerSocket localSocket;
private CountDownLatch latch = new CountDownLatch(1);
public PortForwarder(SSHClient sshClient, InetSocketAddress remoteAddress, ServerSocket localSocket) {
this.sshClient = sshClient;
this.remoteAddress = remoteAddress;
this.localSocket = localSocket;
}
private static String buildName(InetSocketAddress remoteAddress, Integer localPort) {
return "SSH local port forward thread [${localPort}:${remoteAddress.toString()}]"
}
@Override
public void run() {
LocalPortForwarder.Parameters params = new LocalPortForwarder.Parameters("127.0.0.1", localSocket.getLocalPort(),
remoteAddress.getHostName(), remoteAddress.getPort());
LocalPortForwarder forwarder = sshClient.newLocalPortForwarder(params, localSocket);
try {
latch.countDown();
forwarder.listen();
} catch (IOException ignore) {/* OK. */}
}
@Override
public void close() throws IOException {
localSocket.close();
try {
this.join();
} catch (InterruptedException e) {/* OK.*/}
}
}
/**
* Will hand out local ports available for port forwarding
*/
class TunnelPortManager {
final int MAX_PORT = 65536
Set<Integer> portsHandedOut = new HashSet()
ServerSocket leaseNewPort(Integer startFrom) {
for (int port = startFrom; port < MAX_PORT; port++) {
if (isLeased(port)) {
continue;
}
ServerSocket socket = tryBind(port);
if (socket != null) {
portsHandedOut.add(port);
println "handing out port ${port} for local binding"
return socket;
}
}
throw new IllegalStateException("Could not find a single free port in the range [${startFrom}-${MAX_PORT}]...");
}
synchronized void returnPort(ServerSocket socket) {
portsHandedOut.remove(socket.getLocalPort());
}
private boolean isLeased(int port) {
return portsHandedOut.contains(port);
}
protected ServerSocket tryBind(int localPort) {
try {
ServerSocket ss = new ServerSocket();
ss.setReuseAddress(true);
ss.bind(new InetSocketAddress("localhost", localPort));
return ss;
} catch (IOException e) {
return null;
}
}
}
PortForwarder startForwarder(PortForwarder forwarderThread) {
forwarderThread.start();
try {
forwarderThread.latch.await();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
return forwarderThread;
}
SSHClient getSSHClient(username, pw, String hostname, int port=22){
SSHClient client = new SSHClient()
client.addHostKeyVerifier(new PromiscuousVerifier())
client.connect(hostname, port)
client.authPassword(username, pw)
return client
}
int hostCount = hosts.size()
String hostname = hosts[0]
SSHClient client = getSSHClient(username, pw, hostname)
println "making initial connection to ${hostname}"
Session session
//create port forwards up until the final
for (int i=1; i<hostCount; i++){
hostname = hosts[i]
println "creating connection to ${hostname}"
ServerSocket ss = PORT_MANAGER.leaseNewPort(startPort)
InetSocketAddress remoteAddress = new InetSocketAddress(hostname, 22)
PortForwarder forwarderThread = new PortForwarder(client, remoteAddress, ss)
forwarderThread = startForwarder(forwarderThread)
session = client.startSession()
println "adding port forward from local port ${ss.getLocalPort()} to ${remoteAddress.toString()}"
portForwarders.add(forwarderThread)
client = getSSHClient(username, pw, "127.0.0.1", ss.getLocalPort())
}
session = client.startSession()
//shut down the running jboss using the script
Command cmd = session.exec("hostname")
String response = IOUtils.readFully(cmd.getInputStream()).toString()
cmd.join(5, TimeUnit.SECONDS)
println "response -> ${response}"
portForwarders.each { pf ->
pf.close()
}
session.close()
client.disconnect()