es 启动脚本

sh boot status

#!/bin/bash
APP_NAME=elastic
cd `dirname $0`
# 使用说明，用来提示输入参数
usage() {
    echo "Usage: sh boot [APP_NAME] [start|stop|restart|status]"
    exit 1
}
# 检查程序是否在运行
is_exist(){
    # 获取PID
    PID=$(ps -ef |grep ${APP_NAME} |grep -v grep |awk '{print $2}')
    # -z "${pid}"判断pid是否存在，如果不存在返回1，存在返回0
    if [ -z "${PID}" ]; then
        # 如果进程不存在返回1
        return 1
    els
        # 进程存在返回0
        return 0
    fi
}
# 定义启动程序函数
start(){
    is_exist
    if [ $? -eq "0" ]; then
        echo "${APP_NAME} is already running, PID=${PID}"
    else
        sh bin/elasticsearch -d
        is_exist
        echo "${APP_NAME} start success, PID=${PID}"
    fi
}
# 停止进程函数
stop(){
    is_exist
    if [ $? -eq "0" ]; then
        kill -9 ${PID}
        # 检测是否停止
        COUNT=1
        while [ $COUNT -eq 1 ]
        do
            echo -e ".\c"
            sleep 1
            is_exist
            if [ -z "${PID}" ]; then
                COUNT=0
                echo "${APP_NAME} process stop"
            fi
        done
    else    
        echo "There is not the process of ${APP_NAME}"
    fi
}
# 重启进程函数 
restart(){
    stop
    start
}
# 查看进程状态
status(){
    is_exist
    if [ $? -eq "0" ]; then
        echo "${APP_NAME} is running, PID=${PID}"
    else    
        echo "There is not the process of ${APP_NAME}"
    fi
}
case $1 in
"start")
        start
        ;;
"stop")
        stop
        ;;
"restart")
        restart
        ;;
"status")
       status
        ;;
    *)
    usage
    ;;
esac
exit 0