Shell编程

自动化部署脚本

#!/bin/bash



APP_LOCATION="./appTest.jar"
APP_NAME="appTest"
PID_CMD="ps -ef |grep $APP_NAME |grep -v grep |awk '{print \$2}'"


start() {
 echo "----------------------------------start----------------------------------"
 PID=$(eval $PID_CMD)
 if [[ -n $PID ]]; then
     echo "$APP_NAME is already running,PID is $PID"
 else
     nohup java -jar $APP_LOCATION  > ./log.txt 2>&1 &
     sleep 2
     PID=$(eval $PID_CMD)
     if [[ -n $PID ]]; then
         echo "Start $APP_NAME successfully,PID is $PID"
     else
         echo "Failed to start $APP_NAME !!!"
     fi
  fi
  echo "----------------------------------start----------------------------------"
}

stop() {
 echo "----------------------------------stop------------------------------------"
 PID=$(eval $PID_CMD)
 if [[ -n $PID ]]; then
     kill -15 $PID
     sleep 5
     PID=$(eval $PID_CMD)
     if [[ -n $PID ]]; then
         kill -9 $PID
         sleep 2
         echo "Stop $APP_NAME successfully by kill -9 $PID"
     else
         echo "Stop $APP_NAME successfully by kill -15 $PID"
     fi
  else
     echo "$APP_NAME is not running!!!"
  fi
  echo "----------------------------------stop------------------------------------"
}

restart() {
 echo "----------------------------------restart------------------------------------"
 stop
 start
 echo "----------------------------------restart------------------------------------"
}

status() {
 echo "----------------------------------status------------------------------------"
 PID=$(eval $PID_CMD)
 if [[ -n $PID ]]; then
     echo "$APP_NAME is running,PID is $PID"
 else
     echo "$APP_NAME is not running!!!"
 fi
 echo "----------------------------------status------------------------------------"
}

info() {
  echo "----------------------------------info------------------------------------"
  echo "APP_LOCATION: $APP_LOCATION"
  echo "APP_NAME: $APP_NAME"
  #echo "JDK_HOME: $JDK_HOME"
  #echo "VM_OPTS: $VM_OPTS"
  #echo "SPB_OPTS: $SPB_OPTS"
  echo "----------------------------------info------------------------------------"
}

help() {
   echo "----------------------------------help------------------------------------"
   echo "start: start server"
   echo "stop: shutdown server"
   echo "restart: restart server"
   echo "status: display status of server"
   echo "info: display info of server"
   echo "help: help info"
   echo "----------------------------------help------------------------------------"
}

case $1 in
start)
    start
    ;;
stop)
    stop
    ;;
restart)
    restart
    ;;
status)
    status
    ;;
info)
    info
    ;;
help)
    help
    ;;
*)
    help
    ;;
esac
exit $?

 

踩坑

// 注意[[]]内的空格
if [[ -n $PID ]]; then

// 注意{print \$2}转义字符
PID_CMD="ps -ef |grep $APP_NAME |grep -v grep |awk '{print \$2}'"
PID=$(eval $PID_CMD)

 

参考文章

【1】shell 语法

【2】shell脚本部署实战