用PHP编写Nagios插件

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最近写了一个检测网站是否能正常登陆的 php 脚本，并可以作为 Nagios 插件使用

Nagios 插件是 Nagios 提供的一种可通过扩展方式部署的组件，该插件支持 Java、C\C++、php 等多种语言开发，操作员通过修改配置文件和相应参数，就能很方便地将该插件集成到 Nagios 中，实现对目标系统的监控。

Nagios 插件程序可以提供两个返回值，一个是插件的退出状态码，一个是插件在控制台打印的第一行数据。退出状态码可以被 Nagios 主程序作为判断被监控系统服务状态的依据，控制台打印的第一行数据可以被 Nagios 主程序作为被监控系统服务状态的补充说明。

Nagios 主程序可识别的状态码和说明如下：

状态码说明
0 OK
1 WARNING
2 CRITICAL
3 UNKOWN
******** 下面是 php 脚本的内容 ***********
#!/usr/bin/php
if($argc < 3){
echo ‘php ‘.$argv[0].’‘.PHP_EOL;
exit(1);
}
class http{
private $_curl;
private $_user_agent;
private $_cookie;
private $_getopt = array();
private $_postopt = array();
function __construct(){
$this->_user_agent =‘Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20100101 Firefox/15.0.1′;
$this->_cookie =‘/tmp/cookie.txt’;
}
public function get($url){
$this->_getopt = array(CURLOPT_CONNECTTIMEOUT => 20,
CURLOPT_URL => $url,
CURLOPT_HEADER => 0,
CURLOPT_NOBODY => 1,
//CURLOPT_COOKIEJAR => $this->_cookie,
//CURLOPT_COOKIEFILE => $this->_cookie,
CURLOPT_USERAGENT => $this->_user_agent,
CURLOPT_RETURNTRANSFER => 1);
$this->_curl = curl_init();
curl_setopt_array($this->_curl, $this->_getopt);
$data = curl_exec($this->_curl);
$http_code = curl_getinfo($this->_curl, CURLINFO_HTTP_CODE);
$time_total = curl_getinfo($this->_curl, CURLINFO_TOTAL_TIME);
$retval = $http_code.’,’.$time_total;
curl_close($this->_curl);
return $retval;
}
public function post($url,Array $post){
$this->_postopt = array(CURLOPT_CONNECTTIMEOUT => 20,
CURLOPT_URL => $url,
CURLOPT_HEADER => 0,
CURLOPT_COOKIEJAR => $this->_cookie,
CURLOPT_POST => 1,
CURLOPT_POSTFIELDS => http_build_query($post),
CURLOPT_USERAGENT => $this->_user_agent,
CURLOPT_RETURNTRANSFER => 1);
$this->_curl = curl_init();
curl_setopt_array($this->_curl, $this->_postopt);
$data = curl_exec($this->_curl);
curl_close($this->_curl);
return $data;
}
public function rpost($url){
$this->_postopt = array(CURLOPT_CONNECTTIMEOUT => 20,
CURLOPT_URL => $url,
CURLOPT_HEADER => 1,
CURLOPT_NOBODY => 1,
CURLOPT_COOKIEFILE => $this->_cookie,
CURLOPT_USERAGENT => $this->_user_agent,
CURLOPT_RETURNTRANSFER => 1);
$this->_curl = curl_init();
curl_setopt_array($this->_curl, $this->_postopt);
$data = curl_exec($this->_curl);
$http_code = curl_getinfo($this->_curl, CURLINFO_HTTP_CODE);
$time_namelookup = curl_getinfo($this->_curl, CURLINFO_NAMELOOKUP_TIME);
$time_connect = curl_getinfo($this->_curl, CURLINFO_CONNECT_TIME);
$time_starttransfer = curl_getinfo($this->_curl, CURLINFO_STARTTRANSFER_TIME);
$time_total = curl_getinfo($this->_curl, CURLINFO_TOTAL_TIME);
$size_download = curl_getinfo($this->_curl, CURLINFO_SIZE_DOWNLOAD);
$speed_download = curl_getinfo($this->_curl, CURLINFO_SPEED_DOWNLOAD);
curl_close($this->_curl);
//$retval = date(‘Y-m-d_H:i:s’).’,’.$http_code.’,’.$time_namelookup.’,’.$time_connect.’,’.$time_starttransfer.’,’.$time_total.’,’.$size_download.’,’.$speed_download.’,’.$url;
$retval = $http_code.’,’.$time_total;
return $retval;
}
}
class ciwong{
private $_username;
private $_passwd;
private $_http;
private $_sid;
function __construct($username =’3sdf’, $passwd =‘dfser’){
$this->_username = $username;
$this->_passwd = $passwd;
$this->_http = new http();
}
public function postLogin($url){
$post_url =‘http://passport.ciwong.com/signin’;
$post[‘username’] = $this->_username;
$post[‘password’] = $this->_passwd;
$post[‘returnUrl’] = $url;
$data = $this->_http->post($post_url, $post);
$data = $this->_http->rpost($url);
return $data;
}
public function getUrl($url){
$data = $this->_http->get($url);
return $data;
}
}
$type = $argv[1];
$url = $argv[2];
$username =’3244′;
$passwd =’3423′;
$status_ok = 0;
$status_warning = 1;
$cw = new ciwong($username, $passwd);
switch($type){
case‘get’:
$retval = $cw->getUrl($url);
list($http_status, $time_total) = explode(‘,’, $retval);
if ($http_status==200 || $http_status==301 || $http_status==302){
echo“HTTP OK: Status line output is \”$http_status\”– $time_total second response time\n”;
exit($status_ok);
}else{
echo“HTTP WARNING: Status line output is \”$http_status\”– $time_total second response time\n”;
exit($status_warning);
}
break;
case‘post’:
$retval = $cw->postLogin($url);
list($http_status, $time_total) = explode(‘,’, $retval);
if($http_status==200 || $retval==301 || $retval==302){
echo“HTTP OK: Status line output is \”$http_status\”– $time_total second response time\n”;
exit($status_ok);
}else{
echo“HTTP WARNING: Status line output is \”$http_status\”– $time_total second response time\n”;
exit($status_warning);
}
break;
default:
echo‘php‘.$argv[0].’‘.PHP_EOL;
exit(1);
}
***********************over*******************************