自动化监控与故障恢复：Tomcat进程守护与页面状态检查

# 获取tomcat进程ID  
TomcatID=$(ps -ef |grep tomcat |grep -w 'tomcat路径'|grep -v 'grep'|awk '{print $2}')  
  
# tomcat启动程序(这里注意tomcat实际安装的路径)  
StartTomcat=/home/dw/apache-tomcat-7.0.34/bin/startup.sh &
#TomcatCache=/usr/apache-tomcat-5.5.23/work  
  
# 定义要监控的页面地址  
WebUrl=http://haoyayi.eyar.com  
  
# 日志输出  
GetPageInfo=/dev/null  
TomcatMonitorLog=/tmp/TomcatMonitor.log  
  
Monitor()  
{  
  echo "[info]开始监控tomcat...[$(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,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")  
    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