Automatically restarts Tomcat after monitoring Tomcat down on Linux

automatically restarts tomcat after monitoring tomcat down on Linux

• First step edit:monitor.sh file (file contents see below)
• Step Two install crontab (see below for installation steps)
• The third step is to add a timed task: CRONTAB-E

*/1 * * * */usr/java/monitor.sh

• monitor.sh file contents (configured under Manual execution:./monitor.sh See if you can start a hung tomcat)

=========monitor.sh start ===============

#!/bin/sh

#定义环境变量 (to change to your JDK-related address)

Path=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/java/jdk1.7.0_79/bin

Export java_home=/usr/java/jdk1.7.0_79

Export classpath= $JAVA _home/lib: $JAVA _home/lib/tools.jar

Export path= $PATH: $JAVA _home/bin

# Get the Tomcat process ID (note here that TOMCAT7 is changing to its own Tomcat directory name)

tomcatid=$(ps-ef |grep tomcat |grep-w ' tomcat7 ' |grep-v ' grep ' |awk ' {print $} ')

# Tomcat Launcher (note here to change the path to your Tomcat's actual installation)

starttomcat=/usr/java/tomcat7/bin/startup.sh

Tomcatcache=/usr/java/tomcat/work

# You define the page address to monitor, the simpler the better, for example: Write a success on the page

WEBURL=HTTP://IP: Port/test.jsp

# Log Output (self-defined address for output monitoring logs and monitoring of error logs)

Tomcatmonitorlog=/usr/java/monitor/tomcatmonitor.log

Getpageinfo=/usr/java/monitor/pageinfo.log

Monitor()

{

echo "[info] starts monitoring tomcat ... [$(date + '%F%h:%m:%s ')] "

If [[$TomcatID ]];then # here to determine if the Tomcat process exists

echo "[info] current tomcat process ID : $TomcatID, continue to detect page ..."

# Check whether the start is successful (the page will return a status of "+ " if successful)

tomcatservicecode=$(Curl-s-o $GetPageInfo-M--connect-timeout $WebUrl-W%{http_code})

If [$TomcatServiceCode-eq ];then

echo "[info] page return code is $tomcatservicecode, Tomcat started successfully, test page normal ..."

Else

echo[Error]tomcat page error, please note ... The status code is $tomcatservicecodeand the error log is output to $getpageinfo "

echo "[Error] page access error, start reboot tomcat"

Kill-9 $TomcatID # Kill the original tomcat process

#sleep 3

#rm-rf $TomcatCache # Clean up the Tomcat cache

# $StartTomcat

Fi

Else

echo "[Error]tomcat process does not exist!tomcat start auto restart ..."

echo "[info] $StartTomcat, please wait ..."

#rm-RF $TomcatCache

$StartTomcat

Fi

echo "------------------------------"

}

Monitor>> $TomcatMonitorLog

========monitor.sh End =================

• Installing crontab

Installation: Yum install-y Vixie-cron

If the installation fails:A resource in Ngnix 404 can do the following:

Cd/etc/yum.repos.d

VI Ngnix.repo

Put http://nginx.org/packages/OS/OSRELEASE/$basearch/

Change to http://nginx.org/packages/centos/6/$basearch/

This is the address I found under the http://nginx.org/packages/ , of course, it's best if you can see if it matches your Linux system .

• To see If the crontab installation was successful

View crontab Task List: Crontab-l

viewing crontab Status: Service Crond Status

Start crontab: Service cron start

• See If crontab starts automatically

Chkconfig | grep Crond

Crond 0: off 1: off 2: enable 3: enable 4: Enable 5 : enable 6: off

View 2,3,4,5 whether to start

Other common commands:

See if Setup starts automatically: Chkconfig-list crond

Add power-on to the CentOS system automatically: Chkconfig--level crond on

Automatically restarts Tomcat after monitoring Tomcat down on Linux