【守护进程】以守护进程运行Python脚本_其他杂项

A+

所属分类：其他杂项

本文信息本文由方法SEO顾问发表于2024-07-1710:40:21，共 2851 字，转载请注明：【守护进程】以守护进程运行Python脚本_【方法SEO顾问】

概要

目前在做个发布项目，需要一直运行单个Python脚本，以便于对需要发布的任务进行发布逻辑操作，并且是在Linux下运行的

目前能想到的方法有两个：

Crontab定时
Systemctl守护进程

最后决定使用Systemctl守护进程来做，一方面是因为Crontab最小粒度只支持到一分钟，也就是1分钟执行1次，而这个脚本需要的实时性较高，7、8秒一次，另一方面，使用守护进程来做的话，一旦挂了能实现重启进程

方法

release.py后台常驻运行以守护进程的方式运行，一旦挂掉自动重启

需要常驻的脚本：release.py

# -*- coding:utf-8 -*-

import time


# 常驻进程，每8秒执行一个任务的发布
while 1:
    print(time.gmtime())

    # Todo 执行操作
    run()

    # 延时8秒
    time.sleep(8)
常驻进程，每8秒执行一次123456789101112131415

编写systemd： vim /etc/systemd/system/auto_release.service

[Unit]
Description=The python script used for release
After=syslog.target network.target remote-fs.target nss-lookup.target
[Service]
Type=simple
ExecStart=/usr/bin/python3 /data/zaspace/data/AutoRelease/release.py
Restart=on-failure
[Install]
WantedBy=multi-user.target123456789

启动该脚本并且开机运行

systemctl start auto_release
systemctl enable auto_release12

查看该进程的状态

systemctl status auto_release1

运行：

● auto_release.service - The python script used for release
   Loaded: loaded (/etc/systemd/system/auto_release.service; disabled; vendor preset: disabled)
   Active: active (running) since Tue 2019-08-20 13:46:52 CST; 24h ago
 Main PID: 16652 (python3)
   CGroup: /system.slice/auto_release.service
           └─16652 /usr/bin/python3 /data/zaspace/data/AutoRelease/release.py

Aug 21 14:09:03 bank-toolset-forward.novalocal python3[16652]: time.struct_time(tm_year=2019, tm_mon=8, tm_mday=21, tm_hour=...t=0)
Aug 21 14:09:03 bank-toolset-forward.novalocal python3[16652]: time.struct_time(tm_year=2019, tm_mon=8, tm_mday=21, tm_hour=...t=0)
Aug 21 14:09:03 bank-toolset-forward.novalocal python3[16652]: time.struct_time(tm_year=2019, tm_mon=8, tm_mday=21, tm_hour=...t=0)
Hint: Some lines were ellipsized, use -l to show in full.
[root@bank-toolset-forward AutoRelease]# systemctl status auto_release
● auto_release.service - The python script used for release
   Loaded: loaded (/etc/systemd/system/auto_release.service; disabled; vendor preset: disabled)
   Active: active (running) since Tue 2019-08-20 13:46:52 CST; 24h ago
 Main PID: 16652 (python3)
   CGroup: /system.slice/auto_release.service
           └─16652 /usr/bin/python3 /data/zaspace/data/AutoRelease/release.py

Aug 21 14:09:03 bank-toolset-forward.novalocal python3[16652]: time.struct_time(tm_year=2019, tm_mon=8, tm_mday=21, tm_hour=6, tm_min=7, tm_sec=42, tm_wday=2, tm_yday=233, tm_isdst=0)
Aug 21 14:09:03 bank-toolset-forward.novalocal python3[16652]: time.struct_time(tm_year=2019, tm_mon=8, tm_mday=21, tm_hour=6, tm_min=7, tm_sec=50, tm_wday=2, tm_yday=233, tm_isdst=0)
Aug 21 14:09:03 bank-toolset-forward.novalocal python3[16652]: time.struct_time(tm_year=2019, tm_mon=8, tm_mday=21, tm_hour=6, tm_min=7, tm_sec=59, tm_wday=2, tm_yday=233, tm_isdst=0)12345678910111213141516171819202122

上面的输出结果含义如下：