监控最终效果
最近从主产品被调到了火星，技术不到家的我感到压力很大啊。提代码的时候也更加小心翼翼了，生怕搞坏了线上环境。
于是，我就打算给自己做个监控，好让我能快速的发现问题，然后改掉bug。考虑到公司某些规定，就不详细介绍了。下面简答的描述下，有个思路就行。
思路就是：
1. 分析Nginx错误日志，用正则匹配出对应内容
2. SVN blame出错误代码的作者。
3. 借助钉钉的群聊机器人，及时发送出去。
在实现的过程中，遇到了很多问题。大概有这么几个：
1、 服务器端口限制的比较死，不能单独给自己开对外访问的端口。
2、 重复错误的触发。
3、 SVN blame认证问题（没解决。。。）
... ...
整体准备采用Client和Server的模式。
Client内容如下：
使用一个Python脚本，借助crontab监控错误日志，并正则匹配对应的内容，发送给Server端处理。
#!/usr/bin python
# coding: utf8
import sys
reload(sys)
sys.setdefaultencoding("utf8")
import re
import json
import urllib2
import time
# 2017/11/17 16:05:01 [error] 4004#0: *246620391 FastCGI sent in stderr: "PHP message: PHP Fatal error: Function name must be a string in /home/wwwroot/api.newtv.com/live.class.php on line 2242" while reading response header from upstream, client: 192.168.30.100, server: api.changbalive.com, request: "GET /api.php?ac=recordsingsong&curuserid=2635267&channelsrc=appstore&version=1.9.5&token=T777936552f7571e&bless=0&macaddress=A4D0E95D-AB54-48A1-BCC8-3EB0A530B2A7&ismember=0&openudid=d7be3882344bb889cd6c451880df1a834f1af960&systemversion=10.3.3&device=iPhone7,1&broken=0&songid=867712&secret=483f47528d HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "api.changbalive.com"
# 返回值含义：tuple元组内依次为：报错时间，错误类别，错误描述，出错文件全路径，出错位置行数
def parse_errorlog(line):
reg = re.compile(r"(.*?) \[error\] .*?PHP message:(.*?): (.*?) in (.*?) on line (\d+).*");
result = re.findall(reg, line)
# print len(result)
# print result
return result
def get_errorlog(type='api_newtv_error.log'):
path = "/var/log/nginx/{}".format(type)
result = []
with open(path, 'r') as file:
lines = file.readlines()
file.close()
for line in lines:
if line is not None:
result.append(line)
return result
//TODO
// 使用HTTP请求，将找到的错误信息emit到Server端
Server内容
用到的文件大致有这么几个。
findbugauthor.sh receive.php utils.php
findbugauthor.sh
#!/usr/bin bash
export $PATH
DIRPATH=$1
FILENAME=$2
LINE=$3
cd $DIRPATH
AUTHOR=`svn blame $FILENAME | head -$LINE | tail -1 | awk '{print $2}'`
echo $AUTHOR
utils.php
<?php
header("Content-Type:text/html;charset=UTF-8");
function getuniquecode($path, $line){
$errorcode = md5("{$path}{$line}");
return $errorcode;
}
function phpPost( $url, $post = '', $timeout = 5 ){
if( empty( $url ) ){
return ;
}
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
if( $post != '' && !empty( $post ) ){
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Content-Length: ' . strlen($post)));
}
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
$result = curl_exec($ch);
curl_close($ch);
return $result;
}
function getbashoutput($path, $line) {
$dirpath = substr($path, 0, strpos($path, basename($path)));
$filename = basename($path);
$result = "";
exec("bash ./findbugauthor.sh {$dirpath} {$filename} {$line} 2>&1", $result);
return $result[1];
}
//getbashoutput("/home/wwwroot/巴拉巴拉/你的文件ListService.php", 142);
class RedisHelper{
private static $_instance = null;
const APINEWTVERROR_KEY = "zpinewtvcom:error:zset";
const NOTIFY_KEY = "apinewtvcom:notify:hash";
private function __construct(){
$this->redis = new Redis();
$this->redis->connect("127.0.0.1", 6379, 7);
}
public static function getInstance(){
if( self::$_instance == null ) {
self::$_instance = new RedisHelper();
}
return self::$_instance;
}
public function incrErrorNumber($errorcode, $number=1){
$this->redis->zIncrBy(self::APINEWTVERROR_KEY, 1, $errorcode);
}
public function getErrorNumber($errorcode) {
return intval($this->redis->zScore(self::APINEWTVERROR_KEY, $errorcode));
}
public function updateNotifyDate($errorcode){
$this->redis->hSet(self::NOTIFY_KEY, $errorcode, date("Ymd"));
}
public function getNotifyDate($errorcode) {
return $this->redis->hGet(self::NOTIFY_KEY, $errorcode);
}
public function getFrequentErrors($number=7) {
return $this->redis->zRevRange(self::APINEWTVERROR_KEY, 0, $number, true);
}
}
$template = <<<EOF
{
"msgtype": "text",
"text": {
"content": "我就是我, 是不一样的烟火"
},
"at": {
"atMobiles": [
"156xxxx8827",
"189xxxx8325",
],
"isAtAll": false
}
}
EOF;
class Notifier{
private static $instance = null;
private function __construct() {
$this->url = "https://oapi.dingtalk.com/robot/send?access_token=b716e1f39b7fc7afbea04b2巴拉巴拉d4bb79db65a117d589f886d1757";
}
public static function getInstance(){
if(self::$instance==null) {
self::$instance = new Notifier();
}
return self::$instance;
}
public function notify($msg){
global $template;
$data = json_decode($template, true);
$data['text']['content'] = $msg;
$data['at']['atMobiles'] = array(15801479216, );
$data['at']['isAtAll'] = false;
$data['msgtype'] = "text";
$result = phpPost($this->url, json_encode($data));
return $result;
}
}
receive.php
<?php
header("Content-Type:text/html;charset=UTF-8");
require __DIR__."/utils.php";
$time = isset($_REQUEST['time'])?strval($_REQUEST['time']):"";
$level = isset($_REQUEST['level'])?strval($_REQUEST['level']):"";
$description = isset($_REQUEST['description'])?strval($_REQUEST['description']):"";
$fullpath = isset($_REQUEST['fullpath'])?strval($_REQUEST['fullpath']):"";
$linenumber = isset($_REQUEST['linenumber'])?intval($_REQUEST['linenumber']):0;
if(empty($time) || empty($level) || empty($description) || empty($fullpath) || empty($linenumber)) {
echo json_encode(array("errcode"=>-1, "errmsg"=>"请求参数不完整"));
}
$errorcode = getuniquecode($fullpath, $linenumber);
$helper = RedisHelper::getInstance();
$helper->incrErrorNumber($errorcode);
$bugauthor = getbashoutput($fullpath, $linenumber);
$notify = Notifier::getInstance();
var_dump($errorcode);
echo "\n";
$errors = $helper->getFrequentErrors(7);
var_dump($errors);
foreach($errors as $uniquecode=>$numbers) {
if(intval($errorcode) == intval($uniquecode)) {
$msg = "Bug 时间：{$time}\nBug级别：{$level}\n错误描述：{$description}\n文件全路径：{$fullpath}\n出错行数：{$linenumber}\n代码负责人：{$bugauthor}\n";
$notify->notify($msg);
}
}
实现的效果
监控最终效果
不足之处
报警的触发机制还没完善，其实这块要做的内容会很多的，根据不同的场景选择不同的策略很重要，但是要做到灵活的处理，每一个很好的设计是不行的，这里有兴趣的可以自己思考思考。
crontab的时间间隔也是个问题，太小了对服务器压力稍微有一点点的影响（虽然这基本上也没什么影响，但是时间片太小了，触发机制就得跟着更改下）;时间片太大了，报警的灵敏度就下降了，也就失去了报警的意义。
总的来说，思路很简单，但是真的去实现起来并能很好的应用到开发中，还是有很长的路要走的。这里就当是抛砖引玉吧。
