一：在gearman任务失败后，调用task_failed

def task_failed(task, *args): info = '\n'.join(args) datetime = local_datetime() text = '{} FAILED:\n{}\n当前响应worker已关闭\n{}\n-->【{}】'.format(task, info, datetime, task) print(text) check_frequency(task)

二：打印失败信息后，调用check_frequency检查任务5分钟内的重启次数

def check_frequency(task): instance = TaskReloadMonitor() now = time.time() task_info = instance.open(task.lower()) if not task_info: return worker = task_info.get('worker') last_time = task_info.get('last_time') if not last_time: task_info['timer'] = 1 task_info['last_time'] = now instance.write() task_reload(task, worker, task_info['timer']) return if int(now) - int(last_time) > 300: task_info['timer'] = 1 task_info['last_time'] = now instance.write() task_reload(task, worker, task_info['timer']) return timer = task_info.get('timer') if not (timer + 1 > 3): task_info['timer'] = timer + 1 task_info['last_time'] = now instance.write() task_reload(task, worker, task_info['timer'])

三：确认重启任务后，利用subprocess重启任务，subprocess.Popen方法可以非阻塞运行cmd命令

def task_reload(task, worker, timer): from coursepoints.settings import BASE_DIR manage = os.path.join(BASE_DIR, 'manage.py') datetime = local_datetime() command = 'python {} {}'.format(manage, worker) subprocess.Popen(command, shell=True) text = '-->task reload:{}\n-->timer:{}\n-->{}'.format(task, timer, datetime) print(text)

json文件读写

class TaskReloadMonitor(): def __init__(self): pass @property def path(self): path = Path(__file__).parent.joinpath('task.json') return path def open(self, task): try: f = open(self.path, 'r', encoding='utf8') data = json.loads(f.read()) f.close() self.task_data = data task_info = data.get(task) return task_info except Exception as e: print(e) return None def write(self): try: f = open(self.path, 'w', encoding='utf8') data = json.dumps(self.task_data) f.write(data) f.close() except Exception as e: print(e)

json文件内容

{ "pptconvert": { "worker": "pptconvert", "timer": 1, "last_time": 1555356612.9220166 }, "screencapture": { "worker": "screencapture", "timer": 0 }, "snapscreen": { "worker": "snapscreen", "timer": 1, "last_time": 1555441223.166838 }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。