master-worker常驻型程序代码修改哪些需要重启master或者worker

常驻型哪些修改需要重启

之前在yii的项目里用redis作为消息队列，现在很多任务需要延迟需求，于是把之前redis的消息队列替换成了rabbitmq

于是使用yii的yii2-queue这个组件

但是由于提供的yii queue/listen是个单进程的消费，而且也不是守护进程，如果有个任务阻塞,就会对其它的任务有影响，开多个又难以管理

于是使用master-worker的方式开多个worker干活，master监控worker状态

但是进程常驻的程序又牵扯到代码修改了重启的问题
比如在master启动就已经加载到内存的程序代码不重启master是无法得到修改的变更的

下面例子来演示哪些代码需要重启，哪些不需要

这里使用的是从项目里抽出来的简要的进程管理组件

composer require hkui/process_manager

job.php

class job{    public function do($obj){        $i=0;        while(true){            $i++;            echo posix_getpid()."=".$i."-job-".A.PHP_EOL;            sleep(2);            $obj->isExit($i);        }    }}

demo.php

require '../../../vendor/autoload.php';use ProcessManager\Process;define("A","456");class demo extends Process{    public function runJob($worker, $index)    {        \swoole_set_process_name(sprintf('%s-worker-%d', 'test',$index));        include 'job.php';        $job=new job();        $job->do($this);    }}if(count($argv)<3){    exit( "params lost".PHP_EOL);}$process_name=$argv[1];$worker_num=3;if(isset($argv[3])){    $worker_num=intval($argv[3]);}$cmd=$argv[2];$config=[    'process_name'=>$process_name,    'worker_num'=>$worker_num,    'out_file'=>'/tmp/out',    'max_run_time'=>10  //运行10个后自己退出，然后master补上];$process=new demo($config);echo posix_getpid().PHP_EOL;$process->run($cmd);

开启1个master3个workerphp demo.php test start 3[root@6fb38402a4c6 process_manager]# php demo.php test status9982Array(    [0] => 9979 9980 9981    [1] => USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND    [2] => root      9882  0.0  0.1 144952  7420 ?        Ss   08:42   0:00 test-master    [3] => root      9979  0.0  0.1 147004  9212 ?        S    08:49   0:00  \_ test-worker-1    [4] => root      9980  0.0  0.1 147004  9212 ?        S    08:49   0:00  \_ test-worker-2    [5] => root      9981  0.0  0.1 147004  9212 ?        S    08:49   0:00  \_ test-worker-0)修改常量A的值,worker在重启(运行满10次 或者执行 php demo.php test reload) 后,输出的结果不会体现出A的修改变更但是修改 job.php里runJob里的输出，worker在重启后会执行最新的代码如果我们把 include 'job.php'; 拿到外面demo部分替换成define("A","456");include 'job.php';class demo extends Process{    public function runJob($worker, $index)    {        \swoole_set_process_name(sprintf('%s-worker-%d', 'test',$index));        $job=new job();        $job->do($this);    }}这时修改job代码后,worker重启也不会生效了runJob里的代码都是子进程worker里的代码我们在最开始版本的demo代码里打印下print_r(get_included_files());define("A","456");class demo extends Process{    public function runJob($worker, $index)    {        print_r(get_included_files());        \swoole_set_process_name(sprintf('%s-worker-%d', 'test',$index));        include 'job.php';        $job=new job();        $job->do($this);    }}得到Array(    [0] => /www/process/vendor/hkui/process_manager/demo.php    [1] => /www/process/vendor/autoload.php    [2] => /www/process/vendor/composer/autoload_real.php    [3] => /www/process/vendor/composer/ClassLoader.php    [4] => /www/process/vendor/composer/autoload_static.php    [5] => /www/process/vendor/hkui/process_manager/src/Process.php)这时job.php并没有加载到内存里所以每次woker重启，new job时 都会加载最新的job.php代码 ,而常量A在demo.php里定义，已经加载到了内存，所以改A必须重启master才能生效如果把 include 'job.php'; define("A","456"); 下面，这时的get_included_files() 为Array(    [0] => /www/process/vendor/hkui/process_manager/demo.php    [1] => /www/process/vendor/autoload.php    [2] => /www/process/vendor/composer/autoload_real.php    [3] => /www/process/vendor/composer/ClassLoader.php    [4] => /www/process/vendor/composer/autoload_static.php    [5] => /www/process/vendor/hkui/process_manager/job.php    [6] => /www/process/vendor/hkui/process_manager/src/Process.php)修改job内容 worker重启后new Job 不再加载job.php,而是从父进程master继承 所以不会生效，必须重启父进程master

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