centos shell编程3【告警系统】 没有服务器端和客户端的概念 main.sh mon.conf load.sh 502.sh mail.php mail.sh disk.sh 第三十七节课

centos shell编程3【告警系统】  没有服务器端和客户端的概念 main.sh mon.conf load.sh 502.sh mail.php mail.sh  disk.sh  第三十七节课

上半节课

没有服务器端和客户端的概念
main.sh
mon.conf
load.sh

下半节课

502.sh
mail.php
mail.sh
disk.sh

整个项目没有任何架构，都是单机的，没有服务器端和客户端的概念
只是简单调用一下shell脚本，子shell，通过添加更多的shell脚本扩展功能

mail.sh：做邮件收敛
uptime或w 获取load average

需要安装php环境
yum install -y php

需求： 使用shell定制各种个性化告警工具，但需要统一化管理、规范化管理。

思路：指定一个脚本包，包含主程序、子程序、配置文件、邮件引擎、输出日志等。
主程序：作为整个脚本的入口，是整个系统的命脉。
配置文件：是一个控制中心，用它来开关各个子程序，指定各个相关联的日志文件。
子程序：这个才是真正的监控脚本，用来监控各个指标。
邮件引擎：是由一个php程序来实现，它可以定义发邮件的服务器、发邮件人以及收邮件人。
输出日志：整个监控系统要有日志输出。

要求：我们的机器角色多种多样，但是所有机器上都要部署同样的监控系统，也就说所有机器不管什么角色，整个程序框架都是一致的，不同的地方在于根据不同的角色，定制不同的配置文件。

程序架构：

（主目录 mon）
____________________|_______________________________
| | | | |
bin conf shares mail log
| | | | |
[main.sh] [ mon.conf] [load.sh 502.sh] [mail.php mail.sh] [ mon.log err.log ]

bin下是主程序
conf下是配置文件
shares下是各个监控脚本
mail下是邮件引擎
log下是日志。

下面我发出几个示例脚本
1. main.sh

#!/bin/bash
#Written by aming.

# 是否发送邮件的开关
export send=
# 过滤ip地址
export addr=`/sbin/ifconfig |grep -A1 'eth0' |grep addr: |awk '{print $2}'|awk -F: '{print $2}'`
dir=`pwd`
# 只需要最后一级目录名
last_dir=`echo $dir|awk -F'/' '{print $NF}'` #打印最后一段print $NF

# 下面的判断目的是，保证执行脚本的时候，我们在bin目录里，不然监控脚本、邮件和日志很有可能找不到
if [ $last_dir == "bin" ] || [ $last_dir == "bin/" ]; then
conf_file="../conf/mon.conf"
else
echo "you shoud cd bin dir"
exit
fi
exec >>../log/mon.log >>../log/err.log #所有子脚本的错误都重定向到/log/err.log

echo "`date +"%F %T"` load average"
/bin/bash ../shares/load.sh #调用子脚本

#先检查配置文件中是否需要监控502
if grep -q 'to_mon_502=1' $conf_file; then
export log=`grep 'logfile=' $conf_file |awk -F '=' '{print $2}' |sed 's/ //g'`
/bin/bash ../shares/.sh
fi

2. 配置文件 mon.conf

## to config the options if to monitor

## cdb 主要定义mysql的服务器地址、端口以及user、password
to_mon_cdb= ## or , default , not monitor,  monitor
cdb_ip=10.20.3.13
cdb_port=
cdb_user=username
cdb_pass=passwd

## httpd 如果是1则监控，为0不监控
to_mon_httpd=

## php 如果是1则监控，为0不监控
to_mon_php_socket=

## http_code_502 需要定义访问日志的路径
to_mon_502=
logfile=/data/log/xxx.xxx.com/access.log

## request_count 定义日志路径以及域名
to_mon_request_count=
req_log=/data/log/www.discuz.net/access.log
domainname=www.discuz.net

3. load.sh

#! /bin/bash

##Writen by aming##

load=`uptime |awk -F 'average:' '{print $2}'|cut -d',' -f1|sed 's/ //g' |cut -d. -f1` #将空格去掉 1分钟 5分钟 15分钟
if [ $load -gt  ] && [ $send -eq "" ]
then
echo "$addr `date +%T` load is $load" >../log/load.tmp
/bin/bash ../mail/mail.sh $addr\_load $load ../log/load.tmp
fi
echo "`date +%T` load is $load"

4. 502.sh

#! /bin/bash
d=`date -d "-1 min" +%H:%M`
c_502=`grep :$d: $log |grep ' 502 '|wc -l`
if [ $c_502 -gt  ] && [ $send ==  ]; then
echo "$addr $d 502 count is $c_502">../log/.tmp
/bin/bash ../mail/mail.sh $addr\_502 $c_502 ../log/.tmp
fi
echo "`date +%T` 502 $c_502"

disk.sh

#! /bin/bash

##Writen by aming##

rm -f ../log/disk.tmp
for r in `df -h |awk -F '[ %]+' '{print $5}'|grep -v Use`
do
if [ $r -gt  ] && [ $send -eq "" ]
then
echo "$addr `date +%T` disk useage is $r" >>../log/disk.tmp
fi

if [ -f ../log/disk.tmp ]
then
df -h >> ../log/disk.tmp
/bin/bash ../mail/mail.sh $addr\_disk $r ../log/disk.tmp
echo "`date +%T` disk useage is nook"
else
echo "`date +%T` disk useage is ok"
fi

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 = "", $smtp_port = ,$auth = false,$user,$pass)
{
$this->debug = FALSE;
$this->smtp_port = $smtp_port;
$this->relay_host = $relay_host;
$this->time_out = ; //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*).".".$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, ));
$this->smtp_debug($response."\n");
if (!ereg("^[23]", $response)) {
fputs($this->sock, "QUIT\r\n");
fgets($this->sock, );
$this->log_write("Error: Remote host returned \"".$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[];
$smtpserver = "smtp.qq.com";//SMTP服务器
$smtpserverport = "";//SMTP服务器端口
$smtpusermail = "[e-mail]";//SMTP服务器的用户邮箱
$smtpemailto = "[e-mail]";//发送给谁
$smtpuser = "";//SMTP服务器的用户帐号
$smtppass = "1212lss";//SMTP服务器的用户密码
$mailsubject = $argv[];//邮件主题
$mailbody = file_get_contents($file);//邮件内容
$mailtype = "HTML";//邮件格式（HTML/TXT）,TXT为文本邮件
$smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);//这里面的一个true是表示使用身份验证,否则不使用身份验证.
//$smtp->debug = TRUE;//是否显示发送的调试信息
$smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype);
?>

要想发邮件的话，首先要有php支持，若你没有安装过lamp或者lnmp，则需要运行yum install -y php 安装。
然后运行 php mail.php "邮箱主题写在这里" "/tmp/test.txt" 。其中，/tmp/test.txt 内容为邮件内容。

6. mail.sh

#!/bin/bash
log=$
t_s=`date +"%s"`
t_s2=`date -d "-2hour" +"%s"`
if [ ! -f /tmp/$log ]
then
echo $t_s2 > /tmp/$log
fi
t_s2=`tail - /tmp/$log|awk '{print $1}'`
echo $t_s>>/tmp/$log
v=$[$t_s-$t_s2]
echo $v
if [ $v -gt  ]
then
/dir/to/php ../mail/mail.php "$1 $2" "$3"
echo "" > /tmp/$log.txt
else
if [ ! -f /tmp/$log.txt ]
then
echo "" > /tmp/$log.txt
fi
nu=`cat /tmp/$log.txt`
nu2=$[$nu+]
echo $nu2>/tmp/$log.txt
if [ $nu2 -gt  ]
then
/dir/to/php ../mail/mail.php "trouble continue 10 min $1 $2 " "$3"
echo "" > /tmp/$log.txt
fi
fi 

监控磁盘 disk.sh
下面两个分区不需要监控
tmfs /dev/shm
/boot

awk切割df -h
for r in `df -h |awk -F '[ %]+' '{print $5}'|grep -v Use`
分隔符： 一个或多个空格 或者一个或多个百分号作为分隔符 ，然后取出第5段

监控mysql主从
STATUS=$(/usr/bin/mysql -uroot -p11111 -S /var/lib/mysql/mysql.sock -e "show slave status\G" | grep -i "running")

监控内存
grep free -m

监控IO
vmstat 1

f