Tomcat自动重启脚本

参照网上的脚本结合自己的实际环境写的一段tomcat自动重启的脚本,判断当tomcat对cpu的使用率超过70%时就自动重启,记录一下

 

#!/bin/sh
 # func:自动监控tomcat脚本并且执行重启操作
 # author:yaozhiyong
 # date:12/12/2012
 # 定义环境变量
 PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/java/jdk1.5.0_11/bin
 # 获取程序所在路径

 PRG="$0"

 while [ -h "$PRG" ]; do
   ls=`ls -ld "$PRG"`
   link=`expr "$ls" : '.*-> \(.*\)$'`
   if expr "$link" : '/.*' > /dev/null; then
     PRG="$link"
   else
     PRG=`dirname "$PRG"`/"$link"
   fi
 done

 # Get standard environment variables
 PRGDIR=`dirname "$PRG"`

 # Only set CATALINA_HOME if not already set
 [ -z "$TOMCAT_HOME" ] && TOMCAT_HOME=`cd "$PRGDIR/.." >/dev/null; pwd`
 echo "tomcathome: $TOMCAT_HOME"

 # 获取tomcat进程ID
 TomcatPID=$(ps -ef|grep java|grep "$TOMCAT_HOME"|awk '{print $2}')
 echo "[info]TomcatPID: $TomcatPID"
 # tomcat启动程序(这里注意tomcat实际安装的路径)
 StartTomcat=$TOMCAT_HOME/bin/startup.sh
 TomcatCache=$TOMCAT_HOME/work
 # 定义要监控的页面地址
 WebUrl=http://127.0.0.1:8080/monitor.jsp
 # 日志输出
 GetPageInfo=/tmp/TomcatMonitor.Info
 TomcatMonitorLog=/tmp/TomcatMonitor.log
 TomcatCpuCount=/tmp/TomcatCpuCount.info
 TomcatLock=/tmp/Tomcat.lock
 MonitorHttp()
 {
   echo "[info]开始监控tomcat...[$(date +'%F %H:%M:%S')]"
   if [ $TomcatPID ];then  # 这里判断TOMCAT进程是否存在
      echo "[info]当前tomcat进程ID为:$TomcatPID,继续检测页面..."
      # 检测是否启动成功(成功的话页面会返回状态"200")
      TomcatServiceTime=$(curl -s -o $GetPageInfo -m 10 --connect-timeout 10 $WebUrl -w %{time_total})
      if [ TomcatServiceTime -eq 200 ];then
         echo "[info]页面返回码为$TomcatServiceCode,tomcat启动成功,测试页面正常......"
      else
         echo "[error]tomcat页面出错,请注意......状态码为$TomcatServiceCode,错误日志已输出到$GetPageInfo"
         echo "[error]页面访问出错,开始重启tomcat"
         kill -9 $TomcatPID   # 杀掉原tomcat进程
         sleep 3
         rm -rf $TomcatCache # 清理tomcat缓存
         $StartTomcat
      fi
   else
      echo "[error]tomcat进程不存在!tomcat开始自动重启..."
      echo "[info]$StartTomcat,请稍候......"
      rm -rf $TomcatCache
      $StartTomcat
   fi
   echo "------------------------------"
 }

 MonitorCPU()
 {
   echo "[info]开始监控tomcat...[$(date +'%F %H:%M:%S')]"
   if [ $TomcatPID ];then  # 这里判断TOMCAT进程是否存在

      TomcatCpuRate=$(top -b -n1 |awk '{if($1=='$TomcatPID')print $9}')
      echo "[info]当前tomcat进程ID为:$TomcatPID,CPU使用率为 $TomcatCpuRate %..."

      TomcatCpuState=$(echo $TomcatCpuRate|awk -v bi=70 '{print($1>bi)?"1":"0"}')

      echo "cpustate $TomcatCpuState"

      if [ $TomcatCpuState -eq 1 ]; then
          if [ -e $TomcatCpuCount ]; then
             tmpCount=$(cat $TomcatCpuCount |awk '{print $1+1}')
             echo "[warning] [$(date +'%F %H:%M:%S')] tomcat运行异常 CPU:$TomcatCpuRate 累计$tmpCount次"
             echo $tmpCount >$TomcatCpuCount
          else
             echo "[warning] [$(date +'%F %H:%M:%S')] tomcat运行异常 CPU:$TomcatCpuRate 累计1次"
             echo "1" >$TomcatCpuCount
          fi
      else
          echo "[info] [$(date +'%F %H:%M:%S')] tomcat运行正常......"
          echo "0" >$TomcatCpuCount
      fi

      TomcatErrCount=$(cat $TomcatCpuCount|awk '{print $1}');
      echo "[print] TomcatErrCount=$TomcatErrCount"

      if [ $TomcatErrCount -ge 3 ]; then
         echo "[error]tomcat造成cpu负荷太重,需要要重启"
         echo "[error] [$(date +'%F %H:%M:%S')] 开始重启tomcat"
         if [ -e $TomcatLock ];then
           echo "tomcat 正在重启..."
         else
           echo "restarting..." >$TomcatLock
           kill -9 $TomcatPID   # 杀掉原tomcat进程
           sleep 3
           rm -rf $TomcatCache # 清理tomcat缓存
           $StartTomcat
           sleep 1m
           echo "0" >$TomcatCpuCount
           rm -rf $TomcatLock
           echo "tomcat 完成重启..."

         fi
      fi

   else
      echo "[error]tomcat进程不存在!tomcat开始自动重启..."
      echo "[info]$StartTomcat,请稍候......"
      rm -rf $TomcatCache
      $StartTomcat
   fi
   echo "------------------------------"
 }

 MonitorCPU >>$TomcatMonitorLog