Python被远程主机强制关闭后自动重新运行进程的示例

import subprocess  
import time  
def run_main_program():  
    # 启动主程序  
    print("Starting main_program.py...")  
    try:  
        # 使用subprocess.Popen启动主程序，确保可以捕获其PID  
        process = subprocess.Popen(['python', 'main_program.py'])  
        # 等待主程序结束  
        process.wait()  
        print("main_program.py has exited. Restarting...")  
    except Exception as e:  
        print(f"An error occurred: {e}. Trying to restart main_program.py...")  
if __name__ == "__main__":  
    while True:  
        run_main_program()  
        # 等待一段时间后再重新启动（例如每5分钟）  
        time.sleep(300)  # 300秒 = 5分钟  
# 注意：我们需要将'main_program.py'替换为我们的主程序文件名。  
# 此外，请确保这个监控脚本和主程序在同一个目录下，或者提供完整的路径给subprocess.Popen。

sudo apt-get install supervisor  # Debian/Ubuntu  
sudo yum install supervisor      # CentOS/RHEL

[program:myapp]  
command = python /path/to/your/app.py  
directory = /path/to/your/app  
user = your_username  
autostart = true  
autorestart = true  
startsecs = 5  
stopwaitsecs = 600  
environment = ENV_VAR_1=value, ENV_VAR_2=value

sudo supervisorctl reread  
sudo supervisorctl update

sudo supervisorctl status  
sudo supervisorctl tail -f myapp  
sudo supervisorctl restart myapp  
sudo supervisorctl stop myapp

import time  
import random  
def remote_task():  
    """模拟与远程主机的交互，可能因连接关闭而抛出异常"""  
    # 随机模拟成功与失败  
    if random.choice([True, False]):  
        print("任务执行成功")  
    else:  
        raise ConnectionError("与远程主机连接失败")  
def run_task():  
    max_retries = 5  # 最大重试次数  
    retry_interval = 5  # 重试间隔（秒）  
    retries = 0  
    while retries < max_retries:  
        try:  
            remote_task()  
            break  # 成功后跳出循环  
        except ConnectionError as e:  
            print(e)  
            print(f"正在尝试重新连接...（剩余重试次数：{max_retries - retries - 1}）")  
            time.sleep(retry_interval)  
            retries += 1  
    if retries == max_retries:  
        print("达到最大重试次数，任务执行失败。")  
if __name__ == "__main__":  
    run_task()