Linux cron task

In the django project, the database needs to be backed up regularly. I see that django-crontab is used on the Internet, but it is not executed, so the script is loaded directly at the project startup to execute the scheduled task.

django-crontab

django-crontab 0.7.1

crontab

Use the tutorial

How to execute a script at project startup

1. Directly in manage.py

#add your fun
execute_from_command_line(sys.argv)

2. In the app's __init__.py, the app is required to be registered, such as

import os

default_app_config = "monitor.apps.MonitorConfig"
os.system('crontab -u root -r')
os.system('crontab  corn.sh')

corn.sh:
a task that is executed once a day, note that an absolute path is required

0 0 * * *  sh /opt/xxx/do_job.sh

do_job.sh：

#!/bin/bash
#定时任务
cp /opt/backup.sql /tmp/$(date -d "today" +"%Y%m%d").sql

sqlite3 /opt/touch/xxx.db  .dump  > /opt/backup.sql