如何使用Java驅動程序在EC2上連接到MongoDB

Question

我遵循了http://www.jcraft.com/jsch/examples/PortForwardingL.java.html和http://www.jcraft.com/jsch/examples/UserAuthPubKey.java.html的教程，我知道如何連接到EC2使用pem文件作為密鑰通過SSH的Ubuntu實例。 我可以在IntelliJ控制台以及膩子中與EC2實例進行交互。 但是我想連接到MongoDB並使用此處描述的命令。 我嘗試將新的MongoClient與localhost和ec2地址（端口22和27017）一起使用，但是每種組合均失敗。

這是從控制台輸出的：

INFO: Cluster created with settings {hosts=[ec2Instance:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
com.mongodb.diagnostics.logging.JULLogger log
INFO: Exception in monitor thread while connecting to server ec2Instance:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
    at com.mongodb.connection.SocketStream.open(SocketStream.java:63)
    at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:114)
    at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:127)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:50)
    at com.mongodb.connection.SocketStream.open(SocketStream.java:58)
    ... 3 more

這是我的代碼：

import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.UserInfo;
import com.mongodb.MongoClient;


public class Connection {

    private String pathToKey = "path to pem file";
    private String user = "ubuntu";
    private String hostname;

    private int tunnelLocalPort = 22;
    private int tunnelRemotePort = 27017;


    public Connection(String hostname) {
        this.hostname = hostname;
        createConnection();
    }


    private void createConnection() {
        JSch JavaSecureChannel = new JSch();

        try {
            Session session = JavaSecureChannel.getSession(user, hostname, tunnelLocalPort);
            UserInfo userInfo = new OwnUserInfo();

            JavaSecureChannel.addIdentity(pathToKey);
            session.setUserInfo(userInfo);

            session.connect();
            session.setPortForwardingL(tunnelLocalPort, "host", tunnelRemotePort);

            MongoClient client = new MongoClient("ec2Instance");  

            com.jcraft.jsch.Channel channel = session.openChannel("shell");
            channel.setInputStream(System.in);
            channel.setOutputStream(System.out);
            channel.connect();
            // these four lines connect to terminal and I can write commands into IntelliJ console

        } catch (JSchException e) {
            e.printStackTrace();
        }
    }
}

有人能幫我嗎？

Answer 1

您可以在本地計算機上設置SSH隧道以像任何啟用SSH的客戶端（例如Robomongo或IntelliJ）一樣通過端口22連接。 但這是一個麻煩。

除非您的網絡安全明確禁止打開端口27017或您在其上運行Mongo的任何端口，否則請在EC2（安全組）中將其打開。 所有基本的數據庫安全預防措施均適用，即您應該以受限權限的應用程序級別而非“ root”級別的用戶身份進行連接，並且當然，Mongo應該以auth = true開頭。