脚本命令及定时配置

定时cron配置

* * * * * . /etc/profile;/bin/sh /usr/local/services/tomcat_9.0.83/9092/monitor.sh

脚本monitor.sh


#!/bin/sh                                        
# func:自动监控tomcat脚本并且执行重启操作
# author:EagleHao  
# date:2018-04-08
# DEFINE                                               

# 获取tomcat进程ID（其中[grep -w 'tomcat']代码中的tomcat需要替换为你的tomcat文件夹名）         
TomcatID=$(ps -ef | grep tomcat | grep -w 'tomcat_9.0.83/9092' | grep -v 'grep' | awk '{print $2}' | head -n 1)

# tomcat启动程序(这里注意tomcat实际安装的路径)                                                     
StartTomcat=/usr/local/services/tomcat_9.0.83/9092/bin/startup.sh                                   
TomcatCache=/usr/local/services/tomcat_9.0.83/9092/bin/work

#定义要监控的页面地址                                                                           
WebUrl=http://127.0.0.1:9092/YOUR_PROJECT/index_white.html

#日志输出                                                                                      
GetPageInfo=/tmp/TomcatMonitor.Info                                                          
TomcatMonitorLog=/tmp/TomcatMonitor.log                                                      

Monitor()                    
{                 
    echo "[info]开始监控tomcat_PID:[$TomcatID]...[$(date +'%F %H:%M:%S')]"                          

    if [ $TomcatID ];then #这里判断Tomcat进程是否存在             
        echo "[info]当前tomcat进程ID为:$TomcatID,跳过检测页面..."     
        # 检测是否启动成功(成功的话页面会返回状态"200")            
        TomcatServiceCode=$(curl -s -o $GetPageInfo -m 10 --connect-timeout 10 $WebUrl -w %{http_code})                    
        if [ $TomcatServiceCode -eq 200 ];then                          
            echo "[info]页面返回码为$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 $TomcatID # 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 "--------------------------"         
}              
Monitor>>$TomcatMonitorLog

命令解析

获取TomcatPID进程号

ps -ef | grep tomcat | grep -w 'tomcat_9.0.83/9092' | grep -v 'grep' | awk '{print $2}' | head -n 1

解析：

获取第一行结果head -n 1

curl命令获取接口响应码

curl -s -o $GetPageInfo -m 10 --connect-timeout 10 $WebUrl -w %{http_code}