第五部分shell項目一監控腳本

需求： 使用shell定製各類個性化告警工具，但須要統一化管理、規範化管理。

思路：指定一個腳本包，包含主程序、子程序、配置文件、郵件引擎、輸出日誌等。
主程序：做爲整個腳本的入口，是整個系統的命脈。
配置文件：是一個控制中心，用它來開關各個子程序，指定各個相關聯的日誌文件。
子程序：這個纔是真正的監控腳本，用來監控各個指標。
郵件引擎：是由一個php程序來實現，它能夠定義發郵件的服務器、發郵件人以及收郵件人。
輸出日誌：整個監控系統要有日誌輸出。

要求：咱們的機器角色多種多樣，可是全部機器上都要部署一樣的監控系統，也就說全部機器無論什麼角色，整個程序框架都是一致的，不一樣的地方在於根據不一樣的角色，定製不一樣的配置文件。

程序架構：

主目錄 mon
| | | | |
bin conf shares mail log
| | | | |
[main.sh] [ mon.conf] [load.sh 502.sh] [mail.php mail.sh] [ mon.log err.log ]

cd /usr/local/
mkdir mon
cd mon
mkdir bin conf shares mail log
tree ../mon

其中bin下是主程序，conf下是配置文件，shares下是各個監控腳本，mail下是郵件引擎，log下是日誌。
下面我發出幾個示例腳本

1. main.sh
1. #!/bin/bash
2. #Written by aming.
3.
4. export send=1 #聲明一個全局的變量，發郵件的開關，1就發，0不發
5. export addr=`/sbin/ifconfig |grep -A1 'eth0' |grep addr: |awk '{print $2}'|awk -F: '{print $2}'`
6. dir=`pwd`
7. last_dir=`echo $dir|awk -F'/' '{print $NF}'`
8.
9. if [ $last_dir == "bin" ] || [ $last_dir == "bin/" ]; then
10. conf_file="../conf/mon.conf" #配置文件所在的目錄，上面的意思是要執行主要程序必需要進入到bin下才能夠執行
11. else
12. echo "you shoud cd bin dir"
13. exit
14. fi
15. exec 1>>../log/mon.log 2>>../log/err.log #exec 是用來輸出日誌的，是記錄下面的日誌的
16.
17. echo "`date +"%F %T"` load average"
18. /bin/bash ../shares/load.sh #上面輸出時間，而後執行他的子腳本
19. #下面是監控負載的，監控502，這裏有個開關，上面沒有，下面的等於1就執行下面的腳本
20. if grep -q 'to_mon_502=1' $conf_file; then
21. export log=`grep 'logfile=' $conf_file |awk -F '=' '{print $2}' |sed 's/ //g'`
22. /bin/bash ../shares/502.sh
#監控就必須知道訪問日誌，上面就是根據配置文件來獲得訪問日誌
23. fi
24.

2. mon.conf

1. ## to config the options if to monitor
2.
3. ## cdb
4. to_mon_cdb=0 ##0 or 1, default 0,0 not monitor, 1 monitor
5. cdb_ip=10.20.3.13
6. cdb_port=3315
7. cdb_user=username
8. cdb_pass=passwd
9.
10. ## httpd
11. to_mon_httpd=0
12.
13. ## php
14. to_mon_php_socket=0
15.
16. ## http_code_502
17. to_mon_502=1
18. logfile=/data/log/xxx.xxx.com/access.log
19.
20. ## request_count請求數量
21. to_mon_request_count=0
22. req_log=/data/log/www.discuz.net/access.log
23. domainname=www.discuz.net
24.
25. ## analyse access log avoid wget or curl
26. to_mon_log=0
27.

load是用w和uptime查看 求倒數第三個字段，一分鐘以內系統的負載值，有多少進程有多少任務在使用你的cpu

3. load.sh

1. #! /bin/bash
2.
3. ##Writen by aming##
4.
5. load=`uptime |awk -F 'average:' '{print $2}'|cut -d',' -f1|sed 's/ //g' |cut -d. -f1`
6. if [ $load -gt 20 ] && [ $send -eq "1" ]
7. then
8. echo "$addr `date +%T` load is $load" >../log/load.tmp
9. /bin/bash ../mail/mail.sh $addr\_load $load ../log/load.tmp
10. fi
11. echo "`date +%T` load is $load" #若是不大於20，這裏就不執行了
12.

 

/etc/init.d/nginx reload 他網站產生的日誌，查看他的狀態碼，在視頻30分鐘

4. 502.sh
1.
2. #! /bin/bash
3. d=`date -d "-1 min" +%H:%M` #一分鐘檢查一次
4. c_502=`grep :$d: $log |grep ' 502 '|wc -l` #檢測得到502有幾回
5. if [ $c_502 -gt 10 ] && [ $send == 1 ]; then
6. echo "$addr $d 502 count is $c_502">../log/502.tmp #記錄臨時文件，發給指定的人
7. /bin/bash ../mail/mail.sh $addr\_502 $c_502 ../log/502.tmp
8. fi
9. echo "`date +%T` 502 $c_502"
10.

 

5. mail.php
<?php
class Smtp
{
/* Public Variables */
var $smtp_port;
var $time_out;
var $host_name;
var $log_file;
var $relay_host;
var $debug;
var $auth;
var $user;
var $pass;
/* Private Variables */
var $sock;
/* Constractor */
function Smtp($relay_host = "", $smtp_port = 25,$auth = false,$user,$pass)
{
$this->debug = FALSE;
$this->smtp_port = $smtp_port;
$this->relay_host = $relay_host;
$this->time_out = 30; //is used in fsockopen()
#
$this->auth = $auth;//auth
$this->user = $user;
$this->pass = $pass;
#
$this->host_name = "localhost"; //is used in HELO command
$this->log_file = "";
$this->sock = FALSE;
}
/* Main Function */
function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")
{
$mail_from = $this->get_address($this->strip_comment($from));
$body = ereg_replace("(^|(\r\n))(\.)", "\1.\3", $body);
$header = "MIME-Version:1.0\r\n";
if($mailtype=="HTML"){
$header .= "Content-Type:text/html\r\n";
}
$header .= "To: ".$to."\r\n";
if ($cc != "") {
$header .= "Cc: ".$cc."\r\n";
}
$header .= "From: $from<".$from.">\r\n";
$header .= "Subject: ".$subject."\r\n";
$header .= $additional_headers;
$header .= "Date: ".date("r")."\r\n";
$header .= "X-Mailer:By Redhat (PHP/".phpversion().")\r\n";
list($msec, $sec) = explode(" ", microtime());
$header .= "Message-ID: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">\r\n";
$TO = explode(",", $this->strip_comment($to));
if ($cc != "") {
$TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
}

if ($bcc != "") {
$TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
}
$sent = TRUE;
foreach ($TO as $rcpt_to) {
$rcpt_to = $this->get_address($rcpt_to);

if (!$this->smtp_sockopen($rcpt_to)) {
$this->log_write("Error: Cannot send email to ".$rcpt_to."\n");
$sent = FALSE;
continue;
}
if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {
$this->log_write("E-mail has been sent to <".$rcpt_to.">\n");
} else {
$this->log_write("Error: Cannot send email to <".$rcpt_to.">\n");
$sent = FALSE;
}
fclose($this->sock);
$this->log_write("Disconnected from remote host\n");
}
return $sent;
}
/* Private Functions */
function smtp_send($helo, $from, $to, $header, $body = "")
{
if (!$this->smtp_putcmd("HELO", $helo)) {
return $this->smtp_error("sending HELO command");
}
#auth
if($this->auth){
if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {
return $this->smtp_error("sending HELO command");
}
if (!$this->smtp_putcmd("", base64_encode($this->pass))) {
return $this->smtp_error("sending HELO command");
}
}
#
if (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">")) {
return $this->smtp_error("sending MAIL FROM command");
}
if (!$this->smtp_putcmd("RCPT", "TO:<".$to.">")) {
return $this->smtp_error("sending RCPT TO command");
}
if (!$this->smtp_putcmd("DATA")) {
return $this->smtp_error("sending DATA command");
}
if (!$this->smtp_message($header, $body)) {
return $this->smtp_error("sending message");
}
if (!$this->smtp_eom()) {
return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
}
if (!$this->smtp_putcmd("QUIT")) {
return $this->smtp_error("sending QUIT command");
}
return TRUE;
}

function smtp_sockopen($address)
{
if ($this->relay_host == "") {
return $this->smtp_sockopen_mx($address);
} else {
return $this->smtp_sockopen_relay();
}
}
function smtp_sockopen_relay()
{
$this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."\n");
$this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
if (!($this->sock && $this->smtp_ok())) {
$this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."\n");
$this->log_write("Error: ".$errstr." (".$errno.")\n");
return FALSE;
}
$this->log_write("Connected to relay host ".$this->relay_host."\n");
return TRUE;
}
function smtp_sockopen_mx($address)
{
$domain = ereg_replace("^.+@([^@]+)$", "\1", $address);
if (!@getmxrr($domain, $MXHOSTS)) {
$this->log_write("Error: Cannot resolve MX \"".$domain."\"\n");
return FALSE;
}
foreach ($MXHOSTS as $host) {
$this->log_write("Trying to ".$host.":".$this->smtp_port."\n");
$this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
if (!($this->sock && $this->smtp_ok())) {
$this->log_write("Warning: Cannot connect to mx host ".$host."\n");
$this->log_write("Error: ".$errstr." (".$errno.")\n");
continue;
}
$this->log_write("Connected to mx host ".$host."\n");
return TRUE;
}
$this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")\n");
return FALSE;
}
function smtp_message($header, $body)
{
fputs($this->sock, $header."\r\n".$body);
$this->smtp_debug("> ".str_replace("\r\n", "\n"."> ", $header."\n> ".$body."\n> "));
return TRUE;
}
function smtp_eom()
{
fputs($this->sock, "\r\n.\r\n");
$this->smtp_debug(". [EOM]\n");
return $this->smtp_ok();
}
function smtp_ok()
{
$response = str_replace("\r\n", "", fgets($this->sock, 512));
$this->smtp_debug($response."\n");
if (!ereg("^[23]", $response)) {
fputs($this->sock, "QUIT\r\n");
fgets($this->sock, 512);
$this->log_write("Error: Remote host returned \"".$response."\"\n");
return FALSE;
}
return TRUE;
}
function smtp_putcmd($cmd, $arg = "")
{
if ($arg != "") {
if($cmd=="") $cmd = $arg;
else $cmd = $cmd." ".$arg;
}
fputs($this->sock, $cmd."\r\n");
$this->smtp_debug("> ".$cmd."\n");
return $this->smtp_ok();
}
function smtp_error($string)
{
$this->log_write("Error: Error occurred while ".$string.".\n");
return FALSE;
}
function log_write($message)
{
$this->smtp_debug($message);
if ($this->log_file == "") {
return TRUE;
}
$message = date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message;
if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a"))) {
$this->smtp_debug("Warning: Cannot open log file \"".$this->log_file."\"\n");
return FALSE;;
}
flock($fp, LOCK_EX);
fputs($fp, $message);
fclose($fp);
return TRUE;
}
function strip_comment($address)
{
$comment = "\([^()]*\)";
while (ereg($comment, $address)) {
$address = ereg_replace($comment, "", $address);
}
return $address;
}
function get_address($address)
{
$address = ereg_replace("([ \t\r\n])+", "", $address);
$address = ereg_replace("^.*<(.+)>.*$", "\1", $address);
return $address;
}
function smtp_debug($message)
{
if ($this->debug) {
echo $message;
}
}
}
$file = $argv[2];
$smtpserver = "smtp.qq.com";//SMTP服務器
$smtpserverport = "25";//SMTP服務器端口
$smtpusermail = "1198658@qq.com";//SMTP服務器的用戶郵箱，視頻40分鐘
$smtpemailto = "lishi@139.com";//發送給誰
$smtpuser = "1198658";//SMTP服務器的用戶賬號，這個是獨立帳號
$smtppass = "1212lss";//SMTP服務器的用戶密碼，獨立密碼
$mailsubject = $argv[1];//郵件主題
$mailbody = file_get_contents($file);//郵件內容
$mailtype = "HTML";//郵件格式（HTML/TXT）,TXT爲文本郵件
$smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);//這裏面的一個true是表示使用身份驗證,不然不使用身份驗證.
//$smtp->debug = TRUE;//是否顯示發送的調試信息
$smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype);
?>

要想發郵件的話，首先要有php支持，若你沒有安裝過lamp或者lnmp，則須要運行yum install -y php-cli 安裝。
而後運行 php mail.php "郵箱主題寫在這裏" "/tmp/test.txt" 。其中，/tmp/test.txt 內容爲郵件內容。

php -v 看他的版本

若是有報錯，就是他沒有定義時間
Asia/Chongqing

在配置文件 vim /etc/php.ini
搜索 /timezone 找到把他打開就能夠了date.time = 'Asia/Chongqing'

 

發告警郵件的shell腳本，利用mail.php 發郵件

6. mail.sh
1. #! /bin/bash
2. log=$1
3. t_s=`date +%s`
4. t_s2=`date -d "2 hours ago" +%s` #這裏是爲了求兩次告警的時間差值
5. if [ ! -f /tmp/$log ]
6. then
7. echo $t_s2 > /tmp/$log #差值經過這裏得到
8. fi
9. t_s2=`tail -1 /tmp/$log|awk '{print $1}'`
10. echo $t_s>>/tmp/$log
11. v=$[$t_s-$t_s2]
12. #echo $v
13. if [ $v -gt 3600 ]
14. then
15. /usr/bin/php ../mail/mail.php "$1 $2" "$3" #$1 $2是發郵件的主題，$3是發郵件的文件
16. echo "0" > /tmp/$log.txt #上面發完告警後，給他清空
17. else
18. if [ ! -f /tmp/$log.txt ]
19. then
20. echo "0" > /tmp/$log.txt
21. fi
22. nu=`cat /tmp/$log.txt`
23. nu2=$[$nu+1]
24. echo $nu2>/tmp/$log.txt

25. if [ $nu2 -gt 10 ]
26. then
27. /dir/to/php ../mail/mail.php "trouble continue 10 min $1 $2 " "$3"
28. echo "0" > /tmp/$log.txt
29. fi
30. fi
31.