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
总结
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