我正在尝试从cron运行Django管理命令。我使用virtualenv保持我的项目沙盒。
我在这里和其他地方看到了从virtualenv中运行管理命令的示例，例如:
0 3 * * * source /home/user/project/env/bin/activate && /home/user/project/manage.py command arg
然而，尽管syslog显示了任务应该在何时启动的条目，但该任务从未实际运行(脚本的日志文件为空)。如果我从shell中手动运行这一行，它将按预期工作。
我目前可以通过cron运行命令的唯一方法是将命令分解并将它们放在一个哑bash包装脚本中:
#!/bin/sh
source /home/user/project/env/bin/activate
cd /home/user/project/
./manage.py command arg
编辑:
Ars提出了一个命令的工作组合:
0 3 * * * cd /home/user/project && /home/user/project/env/bin/python /home/user/project/manage.py command arg
至少在我的例子中，调用virtualenv的激活脚本没有任何作用。这招管用，所以节目继续。
我也遇到过同样的问题，并花了很多时间去解决它。
这里没有一个解决方案对我有帮助，所以我分享了对我有用的方法:
在项目目录中打开一个新文件“pick_name.sh”。
在"pick_name.sh"文件中，写入并保存以下代码行:
#!/bin/bash
source /YOUR_VIRTUAL_ENV_PATH/bin/activate
export PYTHONPATH="${PYTHONPATH}:/PATH_TO_CUSTOM_MODULE_YOU_CREATED**OPTIONAL**"
export PYTHONPATH="${PYTHONPATH}:/PATH_TO_ANOTHER_CUSTOM_MODULE_YOU_CREATED**OPTIONAL**"
cd /PATH_TO_DIR_STORING_FILE_NAME.PY
python file_name.py
转到/var/spool/cron/crontabs(或到您的cron管理文件所在的位置)并打开“根”文件。
将这些行添加到crontab文件夹中的根文件中:
# m h dom mon dow command
* * * * * /PATH_TO_DIR_WHERE_PICK_NAME.SH_SITS/pick_name.sh >> /YOUR_PROJECT_DIR/cron_output.txt 2>&1
注:
This command (section 4.) will run the "pick_name.sh" file.
In this example it runs every minute, so make sure you change it according to your needs.
It writes all logs to a log file called "cron_ouput".
No need to create the file before, it will be created automatically.
Make sure to replace all paths (I wrote them in capital letters) to your paths.
You can change file names, if so, make sure to change it in all appearances in my instructions to avoid errors.
If you want to add another py file to run by cron, you need to add it to the "pick_nam.sh" file* not to the cron. Simply duplicate section 2. lines in the "pick_nam.sh" but without the "#!/bin/bash" part.
Then, every time the cron will run "pick_name.sh" it will run all the files you specified inside of it.
Make sure to restart cron after changes, it could have saved me a lot of debugging time, use this command:
systemctl restart cron
如果你和我一样是MacOS用户，你可以在/var/mail/{username}文件中查看crontab错误信息。像这样
tail /var/mail/{username}
如果出现“操作不允许”错误，也许你必须将cron添加到全磁盘访问应用程序(安全和隐私>隐私>全磁盘访问应用程序/execs)。
点击+按钮，转到/usr/sbin，双击cron文件。
然后它将修复“不允许”错误。详细步骤
这是我的代码:
0 19 * * * cd /Users/user/Desktop/Project && source /Users/user/Desktop/Project/venv/bin/activate && python command arg
