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開發shell指令碼檢查Nginx實戰分享
一、本指令碼實現功能：
1、自動檢查Nginx下面的代理節點是否正常
2、通過頁面顯示狀態，有問題的節點給出頁面警示及聲音警示。
3、增加新節點，頁面自動載入新節點，無需修改程式。
二、守護檢查指令碼
[[email protected] extra]# cd /server/scripts/[[email protected] scripts]# vi nginx_check.sh#!/bin/bash# oldboy training 21 zhangyao# Defined variablesNginxDir=/application/nginxExtraPath=$NginxDir/conf/extraScriptDir=/server/scriptsStatusLog=$ScriptDir/status.logStatusHtml=$NginxDir/html/status/status.htmlStatusHtmlOri=$NginxDir/html/status/status.html.ori# Judge some files [ -d $NginxDir ] ||exit 1[ -d $ScriptDir ] ||mkdir -p $ScriptDir[ -f $StatusLog ] ||touch $StatusLog[ -f $StatusHtml ] ||touch $StatusHtml# Defined Check URL Functionsfunction check_url(){status=`curl -s $2/check.html`if [ "$status" == "OK" ] then echo "$1 $2 up" >>$StatusLogelse echo "$1 $2 down" >>$StatusLogfi}# Defined List URL and Check Functionsfunction check(){>$StatusLog cd $ExtraPath for file in `ls` #首先遍曆extra目錄下的所有檔案，然後遍曆每個檔案的IP行，將參數傳給check_url do url=(`awk -F "[ ]+" ‘/server/ {print $3}‘ $file`) for i in ${url[*]} do check_url $file $i donedone}# Defined Html Table Format Functionsfunction table(){ #將表格的一行語句累加後一次性插入html檔案char="<tr bgcolor="$1"><th>$2</th><th>$3</th><th>$4</th><th>$5</th></tr>"sum="$sum""$char"}function html(){Index=1 #表格最左側的一列，初始值為1flag=0sum="" #行語句初始值null/bin/cp $StatusHtmlOri $StatusHtml #將status html檔案初始化while read line #一行行讀入$StatusLog檔案，格式為dynamic_pools 10.0.0.6:80 up do array_line=($line) if [ "${array_line[2]}" == "up" ] then table "#90EE90" $Index ${array_line[*]} #將顏色參數、index值及其他參數傳給table函數 else table "#FF0000" $Index ${array_line[*]} ((flag++)) #down情況下flag會計數 fi ((Index++))done<$StatusLog[ $flag -eq 0 ] ||\ #如果flag不為0，肯定有down機器，增加一個語音警示的功能，仿照zabbix sum=$sum"<audio id="clickSound" autoplay="autoplay"><source src="warning.mp3" type="audio/mpeg"></audio>"sed -i "/C0C0C0/a $sum" $StatusHtml #將sum語句插入html檔案}# Defined Main Functionsfunction main(){while true do check html sleep 5done}main
三、相關檔案
status.html.ori
<!doctype html><html><head><meta charset="utf-8"><meta http-equiv="refresh" content="5"><title>Nginx http upstream check status</title></head><body><div align="center"> <table width="1171" height="682" border="1"> <tr> <td background="20150516194115.jpg" ><table align="center" style="background-color:white" cellspacing="0" cellpadding="3" border="1"> <tr bgcolor="#C0C0C0"><th>Index</th><th>Upstream</th><th>Name</th><th>Status</th></tr></td> </tr> </table></div></body></html>
status.html
<!doctype html><html><head><meta charset="utf-8"><meta http-equiv="refresh" content="5"><title>Nginx http upstream check status</title></head><body><div align="center"> <table width="1171" height="682" border="1"> <tr> <td background="20150516194115.jpg" ><table align="center" style="background-color:white" cellspacing="0" cellpadding="3" border="1"> <tr bgcolor="#C0C0C0"><th>Index</th><th>Upstream</th><th>Name</th><th>Status</th></tr></td><tr bgcolor=#90EE90><th>1</th><th>dynamic_pools</th><th>10.0.0.6:80</th><th>up</th></tr><tr bgcolor=#90EE90><th>2</th><th>static_pools</th><th>10.0.0.5:80</th><th>up</th></tr><tr bgcolor=#90EE90><th>3</th><th>static_pools</th><th>10.0.0.6:80</th><th>up</th></tr> </tr> </table></div></body></html>
四、nginx.conf網站配置
worker_processes 1;events { worker_connections 1024;}http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; include extra/static_pools; include extra/dynamic_pools; server { listen 80; server_name www.etiantian.org; location / { if ($http_user_agent ~* "MSIE") { rewrite ^/ http://10.0.0.6/ie.html; } root html; index index.html index.htm; } location /image/ { proxy_pass http://static_pools; include proxy.conf; } location /dynamic/ { proxy_pass http://dynamic_pools; include proxy.conf; } }}extra/dynamic_pools包含檔案upstream dynamic_pools { server 10.0.0.6:80 weight=5;}extra/static_pools包含檔案upstream static_pools { server 10.0.0.5:80 weight=5; server 10.0.0.6:80 weight=5;}
網站下健全狀態檢查檔案：check.html
ok
五、效果
正常狀態效果：
650) this.width=650;" src="http://s3.51cto.com/wyfs02/M02/6D/B8/wKioL1VqrMqQQ_R-AAUXeGAKVhU542.jpg" style="float:none;" title="老男孩IT實效教育0016321.jpg" alt="wKioL1VqrMqQQ_R-AAUXeGAKVhU542.jpg" />警示效果節點故障條目變紅，並且有聲音警示（也可以實現郵件、簡訊警示）
650) this.width=650;" src="http://s3.51cto.com/wyfs02/M02/6D/BD/wKiom1VqqzShouizAAUSDTZkFbk159.jpg" style="float:none;" title="QQ圖片20150531143033.png" alt="wKiom1VqqzShouizAAUSDTZkFbk159.jpg" />
謝謝大家！本文內容來自21期學員張耀！
本文出自 “老男孩linux營運” 部落格，請務必保留此出處http://oldboy.blog.51cto.com/2561410/1656844
開發shell指令碼檢查Nginx實戰分享
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