php实现 master-worker 守护多进程模式的实例代码

具体代码如下所示：

<?php

class Worker{

public static $count = 2;

public static function runAll(){

static::runMaster();

static::moniProcess();

}

//开启主进程

public static function runMaster(){

//确保进程有最大操作权限

unmask(0);

$pid = pcntl_fork();

if($pid > 0){

echo "主进程进程 $pid n";

exit;

}else if($pid == 0){

if(-1 === posix_setsid()){

throw new Exception("setsid fail");

}

for ($i=0; $i < self::$count; $i++) {

static::runWorker();

}

@cli_set_process_title("master_process");

}else{

throw new Exception("创建主进程失败");

}

}

//开启子进程

public static function runWorker(){

unmask(0);

$pid = pcntl_fork();

if($pid > 0){

// echo "创建子进程 $pid n";

}else if($pid == 0){

if(-1 === posix_setsid()){

throw new Exception("setsid fail");

}

@cli_set_process_title("worker_process");

while(1){

sleep(1);

/

/ }

}else{

throw new Exception("创建子进程失败");

}

}

//监控worker进程

public function moniProcess(){

while( $pid = pcntl_wait($status)){

if($pid == -1){

break;

}else{

static::runWorker();

}

}

}

}

Worker::runAll();

ps -aux

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND

root 1 0.0 0.0 18200 3076 pts/0 Ss+ 14:05 0:00 bash

root 6 0.0 0.0 18208 3252 pts/1 Ss 14:06 0:00 bash

root 19 0.0 0.0 18204 3248 pts/2 Ss+ 14:11 0:00 bash

root 64 0.0 0.2 348488 8320 ? Ss 15:32 0:00 master_process

root 65 0.0 0.2 348488 8400 ? Ss 15:32 0:00 worker_process

root 66 0.0 0.2 348488 8400 ? Ss 15:32 0:00 worker_process

root 67 0.0 0.0 36640 2804 pts/1 R+ 15:32 0:00 ps -aux

执行命令 kill 65，杀死进程 65 则master_process 进程会再自动开启一个子进程

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND

root 1 0.0 0.0 18200 3076 pts/0 Ss+ 14:05 0:00 bash

root 6 0.0 0.0 18208 3252 pts/1 Ss 14:06 0:00 bash

root 19 0.0 0.0 18204 3248 pts/2 Ss+ 14:11 0:00 bash

root 64 0.0 0.2 348488 8320 ? Ss 15:32 0:00 master_process

root 66 0.0 0.2 348488 8400 ? Ss 15:32 0:00 worker_process

root 68 0.0 0.1 348488 5796 ? Ss 15:34 0:00 worker_process

root 69 0.0 0.0 36640 2728 pts/1 R+ 15:34 0:00 ps -aux

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