VPS自动监控Shell脚本

linji · 发表于 2011-11-27 21:55:49

本帖最后由 linji 于 2011-12-12 00:54 编辑

希望能够修改成适用于LUM的脚本。

该脚本用于监控VPS服务器负载，Web程序内存及CPU使用。当服务器系统负载或内存使用达到预设值，则重启该程序，或者某个php-cgi进程占用CPU过大，则直接kill掉该进程。目的在于缓解服务器资源耗尽导致意外宕机等情况。

https://gist.github.com/1216837

已经有高手修改成功，详细请看

sys-mon.rar (2.15 KB, 下载次数: 3122)

使用时，根据自己的情况修改以下几处地方。

# 测试站点是否正常运行的url
MY_URL="http://xxxx/"

# 指定当前使用的服务器网卡
NETWORK_CARD="eth0"

# 通知邮件地址
EMAIL="xxx@139.com"

#发送方式 0:系统mail 1:第三方代发

SENDMAIL_TYPE="0";

1.vi /var/script/sys-mon.sh

2.点键盘i键

3.粘贴脚本内容（见帖子下方）

4.点击ESC

5.输入:wq 回车

6.chmod +x /home/monitor.sh

7.设置每分钟执行一次
crontab -e
* * * * * /var/script/sys-mon.sh

vi /usr/local/LuNamp/cmd/crontab_cmd.sh

* * * * * /var/script/sys-mon.sh

#! /bin/bash
#====================================================================
# sys-mon.sh
#
# Copyright (c) 2011, WangYan <webmaster@wangyan.org>
# All rights reserved.
# Distributed under the GNU General Public License, version 3.0.
#
# Monitor system mem and load, if too high, restart some service.
#
# See: https://wangyan.org/blog/sys-mon-shell-script.html
#
# V 2, since 2011-09-14
#====================================================================
# Need to monitor the service name
NAME_LIST="php-fpm mysql nginx"
# Single process to allow the maximum CPU (%)
PID_CPU_MAX="20"
# The maximum allowed memory (%)
SYS_MEM_MAX="90"
# The maximum allowed system load
SYS_LOAD_MAX="5"
# Log path settings
LOG_PATH="/var/log/autoreboot.log"
# Date time format setting
DATA_TIME=$(date +"%y-%m-%d %H:%M:%S")
# Your email address
EMAIL="webmaster@wangyan.org"
# Your website url
MY_URL="https://wangyan.org/blog"
#====================================================================
for NAME in $NAME_LIST
do
SYS_CPU_SUM="0";SYS_MEM_SUM="0"
PID_LIST=`ps aux | grep $NAME | grep -v root`
IFS_TMP="$IFS";IFS=
\n'
for PID in $PID_LIST
do
PID_NUM=`echo $PID | awk '{print $2}'`
PID_CPU=`echo $PID | awk '{print $3}'`
PID_MEM=`echo $PID | awk '{print $4}'`
# echo $NAME: $PID_NUM $PID_CPU $PID_MEM
# SYS_CPU_SUM=`echo $SYS_CPU_SUM + $PID_CPU | bc`
SYS_MEM_SUM=`echo $SYS_MEM_SUM + $PID_MEM | bc`
if [[ "$NAME" = "php-fpm" && "$PID_CPU" > "$PID_CPU_MAX" ]];then
echo "$DATA_TIME kill $PID_NUM successful (CPU:$PID_CPU)" | tee -a $LOG_PATH
kill $PID_NUM
fi
done
IFS="$IFS_TMP"
SYS_LOAD=`uptime | awk '{print $(NF-2)}' | sed 's/,//'`
MEM_COMPARE=`awk 'BEGIN{print('$SYS_MEM_SUM'>'$SYS_MEM_MAX')}'`
LOAD_COMPARE=`awk 'BEGIN{print('$SYS_LOAD'>'$SYS_LOAD_MAX')}'`
# echo -e "$NAME: CPU_SUM:$SYS_CPU_SUM MEM_SUM:$SYS_MEM_SUM SYS_LOAD:$SYS_LOAD\n"
for ((i=0;i<3;i++))
do
STATUS_CODE=`curl -o /dev/null -s -w %{http_code} $MY_URL`
if [ "$STATUS_CODE" = "200" ];then
break
fi
done
if [[ "$MEM_COMPARE" = "1" || "$LOAD_COMPARE" = "1" || "$STATUS_CODE" = "502" ]];then
/etc/init.d/$NAME stop
if [ "$?" = "0" ];then
echo "$DATA_TIME Stop $NAME successful (MEM:$SYS_MEM_SUM CPU:$SYS_CPU_SUM LOAD:$SYS_LOAD)" | tee -a $LOG_PATH
else
echo "$DATA_TIME Stop $NAME [failed] (MEM:$SYS_MEM_SUM CPU:$SYS_CPU_SUM LOAD:$SYS_LOAD)" | tee -a $LOG_PATH
sleep 3
pkill $NAME
fi
/etc/init.d/$NAME start
if [ "$?" = "0" ];then
echo "$DATA_TIME Start $NAME successful" | tee -a $LOG_PATH
else
echo "$DATA_TIME Start $NAME [failed]" | tee -a $LOG_PATH
echo "$DATA_TIME Start $NAME failed" | mail -s "Start $NAME failed" $EMAIL
fi
fi
done

复制代码

flyhome · 发表于 2011-11-28 10:17:07

学习中...........

lend · 发表于 2011-12-3 23:08:58

{:soso_e179:}谢谢分享，很好的东西

大头 · 发表于 2011-12-8 02:00:46

很给力，但是我目前的主机是apache的，nginx的服务我至今没用过，请问对apache的进程能否监控？

dreamdesky · 发表于 2011-12-29 08:59:43

不错不错，支持一下

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