skyfeathers

1、  前言
為了能夠讓管理員直接選擇好若干主機(jī)及機(jī)房然后直接將命令推送到各個(gè)主機(jī)上去執(zhí)行。現(xiàn)整理了一下php里面的ssh2模塊。方便使用。
2、  完整的類代碼如下
<?php
// ssh protocols
// note: once openShell method is used, cmdExec does not work
class ssh2 {
   private $host = 'host';
  private $user = 'user';
  private $port = '22';
  private $password = 'password';
  private $con = null;
  private $shell_type = 'xterm';
  private $shell = null;
  private $log = '';
  function __construct($host='', $port=''  ) {
     if( $host!='' ) $this->host  = $host;
     if( $port!='' ) $this->port  = $port;
     $this->con  = ssh2_connect($this->host, $this->port);
     if( !$this->con ) {
       $this->log .= "Connection failed !";
     }
  }
  function authPassword( $user = '', $password = '' ) {
     if( $user!='' ) $this->user  = $user;
     if( $password!='' ) $this->password  = $password;
     if( !ssh2_auth_password( $this->con, $this->user, $this->password ) ) {
       $this->log .= "Authorization failed !";
     }
  }
  function openShell( $shell_type = '' ) {
    if ( $shell_type != '' ) $this->shell_type = $shell_type;
    $this->shell = ssh2_shell( $this->con,  $this->shell_type );
    if( !$this->shell ) $this->log .= " Shell connection failed !";
    stream_set_blocking( $this->shell, true );
  }
  function writeShell( $command = '' ) {
    fwrite($this->shell, $command."\n");
  }
  function cmdExec( ) {
        $argc = func_num_args();
        $argv = func_get_args();
    $cmd = '';
    for( $i=0; $i<$argc ; $i++) {
        if( $i != ($argc-1) ) {
          $cmd .= $argv[$i]." && ";
        }else{
          $cmd .= $argv[$i];
        }
    }
    echo $cmd;
    $stream = ssh2_exec( $this->con, $cmd );
    stream_set_blocking( $stream, true );
       return stream_get_contents($stream);
  }
  function getLog() {
     return $this->log;
  }
    function getResult(){
        $contents='';
    while (!feof($this->shell)) {
        $contents.=fgets($this->shell);
    }
    return $contents;
    }
}
?>
3、  幾點(diǎn)說(shuō)明
ssh2_exec() 一次只能執(zhí)行一個(gè)指令，也就是說(shuō)，在執(zhí)行完ssh2_exec()之後，PHP就會(huì)將連線中斷，下一個(gè)ssh2_exec()執(zhí)行 時(shí)，會(huì)重新Login進(jìn)去執(zhí)行，也就是說(shuō)指令之間是不會(huì)有關(guān)聯(lián)性的，這對(duì)網(wǎng)路設(shè)備來(lái)說(shuō)是非常不合理的，因?yàn)橛杏眠^(guò)網(wǎng)路設(shè)備的都知道，要完成一項(xiàng)作業(yè)可能會(huì) 需要很多道指令，每個(gè)指令可能都有階層式關(guān)係，我目前的解法是在每個(gè)指令後用換行符號(hào)接起來(lái)，eg."config firewall policy \n edit 1\n"。（多個(gè)指令的時(shí)候可以這樣解決）
不過(guò)因?yàn)閟sh2_shell()不會(huì)主動(dòng)中斷連線，使用時(shí) (Class裡面的openShell跟writeShell)，記得要把logout的指令一並執(zhí)行，不然程式會(huì)hang住
（要將logout指令跑一下表示用戶正常退出掉）
4、  調(diào)用示例
include_once 'ssh2.php';
$shell = new ssh2("192.168.0.100");
$shell->authPassword("root","123456");
$shell->openShell("xterm");
$result=$shell->cmdExec("puppetrun -d --host 123456.puppet.test.com  -t abc >> /dev/null");
$shell->writeShell("exit");
echo $result;