java调用远程服务器的shell脚本以及停止的方法实现

2024-04-02 19:04:59 532人浏览安东尼

摘要

最近接了个需求，要求远程调shell脚本，你没听错！！！需求就一句话，咱是谁，咱是优秀的开发选手。考虑再三，有两种实现方式：方案一：脚本所在服务器安装一个客户端，也就是自己写的一个

最近接了个需求，要求远程调shell脚本，你没听错！！！需求就一句话，咱是谁，咱是优秀的开发选手。考虑再三，有两种实现方式：

方案一：脚本所在服务器安装一个客户端，也就是自己写的一个小程序，本地通过端口调目标服务器的程序，然后程序调本机上的shell脚本！

优点：通过端口调用，用户不用暴露服务器的账号密码，安全性高

缺点：我们需要一直维护这个客户端程序，而且每接入一台服务器，都得安装该客户端，另外非常考验客户端程序的健壮性。

方案二：本地直接通过IP,服务器账号密码调远程服务器的shell脚本

优点：代码易开发，扩展时只用扩展服务端代码即可

缺点：用户服务器的账号密码会暴露给服务端，密码安全问题

把每种方案的优缺点汇报给leader，leader说：按第二种来吧

来吧！！开干，废话不多说，直接上代码：

导入程序所需的软件包：


<dependency>
   <groupId>org.jvnet.hudson</groupId>
   <artifactId>ganymed-ssh2</artifactId>
   <version>build210-hudson-1</version>
</dependency>

程序涉及的demo：


import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.NIO.charset.Charset;
 
import org.apache.commons.io.IOUtils;
 
import ch.ethz.ssh2.ChannelCondition;
import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;
import ch.ethz.ssh2.StreamGobbler;
 
public class RemoteShellExecutor {
 
   private Connection conn;
   
   private String ip;
   
   private String osUsername;
   
   private String passWord;
   private String charset = Charset.defaultCharset().toString();
 
   private final String GET_SHELL_PID = "ps -ef | grep '%s' | grep -v grep |awk '{print $2}'";
 
   private final String KILL_SHELL_PID = "kill -15 %s";
 
   private static final int TIME_OUT = 1000 * 5 * 60;
 
   
   public RemoteShellExecutor(String ip, String usr, String pasword) {
     this.ip = ip;
     this.osUsername = usr;
     this.password = pasword;
   }
 
 
   
   private boolean login() throws IOException {
     conn = new Connection(ip);
     conn.connect();
     return conn.authenticateWithPassword(osUsername, password);
   }
 
   
   public ExecuteResultVO exec(String cmds) throws Exception {
     InputStream stdOut = null; 
     InputStream stdErr = null;
     ExecuteResultVO executeResultVO = new ExecuteResultVO();
     String outStr = "";
     String outErr = "";
     int ret = -1;
     try {
     if (login()) {
       // Open a new {@link Session} on this connection
       Session session = conn.openSession();
       // Execute a command on the remote Machine.
       session.execCommand(cmds);
 
       stdOut = new StreamGobbler(session.getStdout());
       outStr = processStream(stdOut, charset);
 
       stdErr = new StreamGobbler(session.getStderr());
       outErr = processStream(stdErr, charset);
 
       session.waitForCondition(ChannelCondition.EXIT_STATUS, TIME_OUT);
 
       System.out.println("outStr=" + outStr);
       System.out.println("outErr=" + outErr);
 
       ret = session.getExitStatus();
       executeResultVO.setOutStr(outStr);
      executeResultVO.setOutErr(outErr);
      
     } else {
       throw new Exception("登录远程机器失败" + ip); // 自定义异常类 实现略
     }
     } finally {
       if (conn != null) {
         conn.close();
       }
       IOUtils.closeQuietly(stdOut);
       IOUtils.closeQuietly(stdErr);
     }
     return ret;
   }
 
   
   private String processStream(InputStream in, String charset) throws Exception {
     byte[] buf = new byte[1024];
     StringBuilder sb = new StringBuilder();
     int len = 0;
     while ((len=in.read(buf)) != -1) {
       sb.append(new String(buf,0,len, charset));
     }
     return sb.toString();
   }
 
  public static void main(String args[]) throws Exception {
    //调远程shell
    RemoteShellExecutor executor = new RemoteShellExecutor("192.168.234.123", "root", "beebank");
    System.out.println(executor.exec("sh /data/checkMysql.sh"));
    //获取远程shell 进程 pid
    ExecuteResultVO executeResultVO = executor.exec(String.fORMat(GET_SHELL_PID,"sh /data/checkmysql.sh"));
    //杀掉shell进程
    ExecuteResultVO executeResultVO1 = executor.exec(String.format(KILL_SHELL_PID ,executeResultVO.getOutStr()));
 
  }
 
  public class ExecuteResultVO<T>{
    private String outStr;
    private String outErr;
     //省略get set
 }
}