参考：[https://www.cnblogs.com/chenyongblog/p/11831498.html](https://www.cnblogs.com/chenyongblog/p/11831498.html) ``` #!/bin/bash fileName=$1 echo "CPU%,MEM%,TIME" > $fileName for (( i = 0; i < 3000; i++ )) do output=`top -b -n1 | grep "Cpu(s)" | awk '{print $2 ","}' | tr -d '\n' && free -m | grep 'Mem' | awk '{print $3/$2 * 100 ","}' | tr -d '\n' && date | awk '{print $4}'`>temp echo "$output" >> $fileName sleep 1 done ``` 参考：[https://www.cnblogs.com/changdingfang/p/11996211.html](https://www.cnblogs.com/changdingfang/p/11996211.html) ``` #!/bin/bash #提取本服务器的IP地址信息 ENO1=`ifconfig | sed -n '1,1p' | awk -F ' ' '{print $1}'` IP=`ifconfig ${ENO1}| grep "inet addr" | cut -f 2 -d ":" | cut -f 1 -d " "` echo 'eno: '${ENO1} echo 'IP: '${IP} # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # 各个监控警告值 WARN_LOAD=1.1 WARN_CPU=0.95 WARN_MEM=0.93 # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # CPU=0.0 LOAD1=0.0 LOAD5=0.0 LOAD15=0.0 MEM=0.0 # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # send_mail() { echo 'send mail ' "${1}" "${2}" } # 1、监控系统负载的变化情况. system_load_func() { cpu_num=`grep -c 'model name' /proc/cpuinfo` load=$(uptime | awk -F 'load average: ' '{print $2}') load_1=$(echo $load | awk -F ', ' '{print $1}') load_5=$(echo $load | awk -F ', ' '{print $2}') load_15=$(echo $load | awk -F ', ' '{print $3}') #计算当前系统单个核心平均负载值，结果小于1.0时前面个位数补0。 LOAD1=`echo "scale=2;a=${load_1}/${cpu_num};if(length(a)==scale(a)) print 0;print a" | bc` LOAD5=`echo "scale=2;a=${load_5}/${cpu_num};if(length(a)==scale(a)) print 0;print a" | bc` LOAD15=`echo "scale=2;a=${load_15}/${cpu_num};if(length(a)==scale(a)) print 0;print a" | bc` if [ `echo "${LOAD15} > ${WARN_LOAD}" | bc` -eq 1 ] then send_mail "${IP}服务器15分钟的系统平均负载为${LOAD15}, 超过警戒值${WARN_LOAD}, 请立即处理!" "$IP 服务器系统负载告警!" fi } # 2、监控系统cpu的情况. cpu_func() { #取当前空闲cpu百份比值(只取整数部分) cpu_idle=`top -b -d 0.1 -n 2 | grep Cpu | tail -n 1 | awk '{print $8}' | cut -f 1 -d "."` CPU=0`echo "scale=2; (100 - ${cpu_idle}) / 100" | bc` if [ `echo "${CPU} > ${WARN_CPU}" | bc` -eq 1 ] then send_mail "${IP}服务器cpu使用${CPU},请及时处理." "$IP 服务器CPU告警" fi } #3. 监控物理内存 mem_func() { mem=$(free -m | sed -n '2,2p') mem_total=`echo ${mem} | awk -F ' ' '{print $2}'` mem_used=`echo ${mem} | awk -F ' ' '{print $3}'` # mem_free=`echo ${mem} | awk -F ' ' '{print $4}'` if [ $mem_used -ne 0 ] then MEM=0`echo "scale=2; ${mem_used} / ${mem_total}" | bc` if [ `echo "${MEM} > ${WARN_MEM}" | bc` -eq 1 ] then send_mail "$IP服务器物理内存已使用 ${MEM},请及时处理." "$IP 服务器内存告警" fi fi } CNT=1 print_info() { echo "# # # # # # # # # # # [${CNT}] # # # # # # # # # # # # # #" echo cpu: ${CPU} echo load1: ${LOAD1} echo load5: ${LOAD5} echo load15: ${LOAD15} echo mem: ${MEM} echo "# # # # # # # # # # # # # # # # # # # # # # # # # # #" (( CNT += 1 )) # exit 0 } while true do system_load_func cpu_func mem_func print_info sleep 5 done ```