shell monitor process status, self-starting

monitoring shell script, will be achieved through while true, did not use crontab

#!/bin/bash
source /etc/profile

appname = aurora-gateway-provider-1.3.1_build2.jar # [] displayed process name jps
[App_script with the parent directory, and start-up mode, such as aurora-gateway startup mode is sh sbin / app.sh start] app_path = / opt / workspace / aurora-gateway / #
app_script = app.sh # [startup script]

        # No need to modify the following
        function monitor() {
                monitorOutputLog=/data/aurora-gateway/logs/monitor/$(date '+%Y%m%d').log
                if [ ! -f "$monitorOutputLog" ];then
                                touch "$monitorOutputLog"
                        be

                pid = $ (jps | awk -v var = $ appname '{if ($ 2 ~ var) print $ 1}') #awk -v shows a shell variables introduced appname awk expression; {if ($ 2 ~ var) print $ 1} judgment is not similar, like printing pid
                if (kill -0 $ pid 2> / dev / null); then # kill -0 $ pid:? pid process to check whether there is, echo $ exists 0 is returned; there is no return 1; 2> / dev / null: representation does not output an error message
                echo "$(date '+%Y-%m-%d %H:%M:%S')      $appname is running" >> $monitorOutputLog
                sleep 15 #sleep 15秒
                else
                        cd $app_path && sh sbin/$app_script start
                        pid = $ (jps | awk -v var = $ appname '{if ($ 2 ~ var) print $ 1}')
                        if (kill -0 $pid 2>/dev/null);then
                        echo "$ (date '+% Y-% m-% d% H:% M:% S') $ appname started successfully" >> $ monitorOutputLog
                        sleep 15
                        else
                        echo "$ (date '+% Y-% m-% d% H:% M:% S') $ appname failed to start" >> $ monitorOutputLog
                        sleep 15
                        be
                be
        }

while true
do
monitor
done


# Steps for usage:
# [root] mkdir -p /data/aurora-gateway/logs/monitor/
# [root] chown deploy:deploy /data/aurora-gateway/logs/monitor/
# Copy aurora_gateway_monitor.sh to the / opt / workspace / aurora-gateway / directory
# [root] chown deploy:deploy /opt/workspace/aurora-gateway/aurora_gateway_monitor.sh
# chmod +x /opt/workspace/aurora-gateway/aurora_gateway_monitor.sh
# [Root] su - deploy
# cd /opt/workspace/aurora-gateway/
# ./aurora_gateway_monitor.sh&
# Check whether the log normal output