1. 利用Shell脚本实现

#!/bin/bashPORT=0while [ true ];do    read -p "please enter the port that you want to minitor:" port    if [ $port -gt 65536 ] ||  [ $port -lt 1 ];then        echo 'the port you enter is not correctly'    else        PORT=$port        break    fidonewhile [ true ]; do    if [ `netstat -anp 2> /dev/null | grep ${PORT} | wc -l` -gt 0 ] ;then        echo 'service is online'    else        echo 'service is offline'        cd /home/eko/share/live_admin/script        php ./ws.php &    fi    sleep 3done

 

2. 利用Swoole定时器实现

class Server {    const PORT = 8811;    public function port() {        $shell  =  "netstat -anp 2>/dev/null | grep ". self::PORT . " | grep LISTEN | wc -l";        $result = shell_exec($shell);        if($result != 1) {            // 发送报警服务 邮件 短信            /// todo            echo date("Ymd H:i:s")."error".PHP_EOL;        } else {            echo date("Ymd H:i:s")."succss".PHP_EOL;        }    }}// nohupswoole_timer_tick(2000, function($timer_id) {    (new Server())->port();    echo "time-start".PHP_EOL;});