使用cron+php脚本监控后台任务脚本

task1.php

<?php error_reporting(E_ERROR | E_WARNING | E_PARSE);
// redis
$redis = new Redis();
$redis->pconnect(REDIS_HOST, REDIS_PORT);
$redis->auth(REDIS_PASS);
// task
while (true) {
    $task = $redis->rPop(‘mytask1‘);
    if ($task !== false) {
        // todo
        continue;
    }
    sleep(1);
}
?>

task_monitor.php

<?php error_reporting(E_ERROR | E_WARNING | E_PARSE);
// 任务数组
$tasks = array(
    ‘task1.php‘,
    ‘task2.php‘,
    ‘task3.php‘,
    ‘task4.php‘,
    ‘task5.php‘
    );
// 查找正在运行的任务
$cmd = "ps -ef | grep ‘task‘";
$res = shell_exec($cmd);
$all = explode("\n", $res);
$running = array();
for($i=0; $i<count($all); $i++){
    $array = explode("php ", $all[$i]);
    $p = trim($array[1]);
    if(!empty($p)) {
        $p = str_replace(‘/mytask/‘, ‘‘, $p);
        $running[] = $p;
    }
}
echo(date(‘Y-m-d H:i:s‘)."\n");
$date=date(‘YmdHis‘);
// 查找不在运行的任务并启动任务
for($i=0; $i<count($tasks); $i++){
    if(in_array($tasks[$i], $running)) {
        echo($tasks[$i]." is running\n");
    } else {
        echo($tasks[$i]." is dead\n");
        $cmd = "nohup /usr/bin/php /mytask/".$tasks[$i]." >/mytask/nohup/mytask.log 2>&1 &";
        $res = shell_exec($cmd);
    }
}
echo("\n");
?>