Shell监控JVM内存-企业微信群告警

╰半夏微凉° 2022-09-10 14:12 238阅读 0赞

区分JDK版本是16还是非16  
jdk16查看内存工具

jhsdb jmap --heap --pid pid

非16版本查看内存工具

jmap -heap pid

脚本文件名：/mnt/disk/app/monitor/jvm\_monitor.sh  
监控脚本内容

#!/bin/bash
    export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/home/rocketmq/bin:/usr/local/jdk16/bin:/usr/local/git/bin:/usr/local/node/bin:/root/bin
    #jdk版本号
    jdkVersion=`java -version 2>&1 | sed '1!d' | sed -e 's/"//g' | awk '{print $3}'`
    
    sysdate=`date +"%Y-%m-%d %H:%M:%S" -d now`
    
    for pid in `jps |grep -v Jps|awk '{print $1}'`
    do
    process_name=$(ps -ef|grep java|grep $pid)
    
    #jvm内存监控
    echo -------------------------------------------------
    echo 日期:$sysdate
    echo JDK版本:$jdkVersion
    echo 进程ID:${pid}
    echo 进程信息:${process_name}
    
    if [ "$pid" = "" ]
    then
    	echo "the program is not exists."
    	exit 0
    fi
    
    if [[ ${jdkVersion} == 16 ]]
    then
        heap=$(jhsdb jmap --heap --pid ${ pid})
    else
        heap=$(jmap -heap ${ pid})
    fi
    
    
    G1Heap=`echo ${ heap}|sed 's/^.*G1 Heap://g'|sed 's/G1 Young Generation:.*$//g'|awk '{print $16}'|sed 's/%.*$//g'|cut -b 1-6`
    
    G1Old=`echo ${ heap}|sed 's/^.*G1 Old Generation://g'|awk '{print $16}'|sed 's/%.*$//g'|cut -b 1-6`
    
    echo "当前JVM堆区使用率: ${G1Heap}%"
    echo "当前JVM老年代堆区使用率: ${G1Old}%"
    
    G1Heap1=`gawk -v x=$G1Heap -v y=1000 'BEGIN{printf "%.0f\n",x*y}'`
    G1Old1=`gawk -v x=$G1Old -v y=1000 'BEGIN{printf "%.0f\n",x*y}'`
    
    #解析IP地址
    interIp=$(ip addr | awk '/^[0-9]+: / { }; /inet.*global/ { print gensub(/(.*)\/(.*)/, "\\1", "g", $2)}') sendMsg="" if [ ${G1Heap1} -ge "85000" ] then sendMsg=${sendMsg}" dev":${interIp}" "PID:${pid}" "JVM堆区使用率:${G1Heap}%超阀值"\n" fi if [ ${G1Old1} -ge "85000" ] then sendMsg=${sendMsg}" dev"IP:${interIp}" "PID:${pid}" "JVM老年代堆区使用率:${G1Old}%超阀值 fi if [ -n "${sendMsg}" ]; then sendMsg=${sysdate}" "${sendMsg} echo "发送消息："$sendMsg curl 'https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=7c07644b-91eb-498c-9a78-045575cc67b8' -H 'Content-Type: application/json' -d "{ \"msgtype\": \"text\",\"text\": { \"content\": \"${sendMsg}\",\"mentioned_mobile_list\":[]}}"
    fi
    
    done

chmod +x /mnt/disk/app/monitor/jvm\_monitor.sh  
添加系统任务，每隔3分钟执行一次监控脚本  
crontab -e

*/3 * * * * /mnt/disk/app/monitor/jvm_monitor.sh >> /mnt/disk/app/monitor/jvm_monitor.log  2>&1

重新载入配置

service crond reload