监控负载脚本

在内网监控系统性能的工具很多，但是针对外网服务器，则这些工具有点不太实用，因为它们或多或少需要我们开启一些不必要服务，如web（本身通过web检 测外网服务器性能就不安全），针对服务器而言，服务越少就越安全！因此，针对公司这种特殊的网络环境，我写了这个脚本，当然有多可以实现这种功能的方法， 我也肯定你能写出比我这脚本更好的程序来（如果确实如此，希望你能与我们共享，
脚本本身很简单，在这我只是将脚本代码放在上面，见如下：

主要功能，检测系统的磁盘空间使状况，cpu负载，mem，swap使用状况，mysql与apache占用资源情况及apache的并发连接数量，并且当cpu或磁盘空间使用率达到一定百份比时，自动将邮件发送到管理邮箱
#!/bin/bash
#systeminfo
################################################################
#/*定义环境变量*/
###############################################################
source /etc/profile
ADMIN="[e-mail]"
DATE=`date '+%m-%d-%Y %H:%M'`
SOURCINGMAP="/home/script/sourcingmap"
SYSTEMINFO="/home/script/systeminfo"
#######检测磁盘，mysql与apache详细信息
df -Th|egrep "(^/dev/sda3|^Filesystem)">$SYSTEMINFO
top -u mysql -b -n 1 >>$SYSTEMINFO
netstat -n|grep "^tcp"|grep "ffff"|egrep "(80|443)"|sort >>$SYSTEMINFO
################################################################
###从日志信息中获取相关信息给变量符值
UP=`grep "^top" $SYSTEMINFO|awk '{print$5,$6,$7}'`
CPU_LOAD_AVERAGE_DETAILS=`grep "^top" $SYSTEMINFO|awk -F',' '{print $4,$5,$6}'`
PROCESSLIST_DETAILS=`grep "^Tasks" $SYSTEMINFO`
CPU_DETAILS=`grep "^Cpu" $SYSTEMINFO`
MEM_DETAILS=`grep "^Mem" $SYSTEMINFO`
SWAP_DETAILS=`grep "^Swap" $SYSTEMINFO`
MYSQL_CPU=`grep "mysql" $SYSTEMINFO|awk '{print $9}'`
##如果mysql cpu负载达到100，则将mysql进程信息输出到指定日志文件
if [ "$MYSQL_CPU" -ge "100" ];then
    /export/script/mysql_status.sh
fi
##################################################################
###从日志信息中获取相关信息给变量符值
MYSQL_MEM=`grep "mysql" $SYSTEMINFO|awk '{print $10}'`
HTTPD_CONNECTS=`ps -elf |grep httpd|wc -l`
HTTPD_CONNECTS_DETAILS_SORT=`egrep "(80|443)" $SYSTEMINFO`
HTTPD_CONNECTS_TOTAL_SORT=`/export/script/httpd_port.sh|awk '{print $1,$2"\n"$3,$4"\n"$5,$6"\n"$7,$8"\n"$9,$10}'`
DISK_DETAILS=`egrep "(^/dev/sda3|^Filesystem)" $SYSTEMINFO`
################################################################
#计算磁盘空间巳被使空间百分比数及一分钟内cpu的负载值
PERCENT_DISK=`egrep "(^/dev/sda3)" $SYSTEMINFO|awk '{print $6*1}'`
CPU_LOAD_ONE_MIN=`grep "^top" $SYSTEMINFO|awk -F',' '{print $4}'|awk -F':' '{print $2*100}'`
#echo $PERCENT_DISK
#echo $CPU_LOAD_ONE_MIN
################################################################
#将获得的系统变量信息导入到指定的日志文中
echo "System Details Report From Sourcingmap" >$SOURCINGMAP
echo "Now is $DATE">>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo "Time of Sourcingmap has been working:$UP" >>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo "Cpu_Load_Average_Details of Sourcingmap are:$CPU_LOAD_AVERAGE_DETAILS" >>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo -e "Disk Details of Sourcingmap are: \n $DISK_DETAILS" >>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo "Processlist Details of Sourcingmap are:$PROCESSLIST_DETAILS" >>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo "Cpu Load Details are: $CPU_DETAILS" >>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo "Mem Details of Sourcingmap are :$MEM_DETAILS" >>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo "Swap Details of Sourcingmap are :$SWAP_DETAILS" >>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo "Cpu Load For Mysql is: $MYSQL_CPU" >>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo "Mem Load For Mysql is: $MYSQL_MEM" >>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo "Apache's process is: $HTTPD_CONNECTS" >>$SOURCINGMAP
echo "">>$SOURCINGMAP
echo -e "Detail of Sourcingmap for Httpd :\n $HTTPD_CONNECTS_DETAILS_SORT" >>$SOURCINGMAP
echo "">> $SOURCINGMAP
echo -e "Connect Sort of Sourcingmap for Httpd :\n $HTTPD_CONNECTS_TOTAL_SORT" >>$SOURCINGMAP
#如果满足指定条件，则系统信息将发送到指邮箱
if [ "$PERCENT_DISK" -ge "70" -o  "$CPU_LOAD_ONE_MIN" -ge "180" -o "$MYSQL_CPU" -ge "100" ]
    then
    mail $ADMIN -s "System Report For Sourcingmap(Cpu or Disk exceeded)" < $SOURCINGMAP
    mail [e-mail] -s "System Report For Sourcingmap(Cpu or Disk exceeded)" <$SOURCINGMAP
    mail [e-mail] -s "System Report For Sourcingmap(Cpu or Disk exceeded)" <$SOURCINGMAP
fi

将脚本放入cron中，并且在/etc/aliases中设置管理邮箱即可

httpd_port.sh中的内容如下：
#/bin/bash
netstat -n|awk '/^tcp/ {++S[$NF]} END {for(a in S) print a,S[a]}'

mysql_status.sh内容如下 ：
#!/bin/sh
DATE=`date '+%Y%m%d%H%M'`
STATUS_LOGS="/home/script/sourcingmap"
IP="localhost"
if [ ! -f $STATUS_LOGS ];then
        /bin/touch $STATUS_LOGS
fi
for i in $IP
        do
                HOSTNAME=$i
echo "================ mysql status analize for $HOSTNAME date:$DATE====================">>$STATUS_LOGS
echo "==========================  Status For $HOSTNAME ==================================">>$STATUS_LOGS
mysqladmin processlist >>$STATUS_LOGS
echo "" >> $STATUS_LOGS
/usr/sbin/mysqlreport --host $IP >>$STATUS_LOGS
done