In Centos 7 I have been running screen on reboot (via cron) to start a script like this.<\/p>\n\n\n\n
@reboot screen -d -m -S pir \/opt\/bin\/myscustom.py<\/pre>\n\n\n\nBut wanted to be more modern and use systemd unit files and as of Rocky 8 (Recall I am moving things to Rocky 9) I can run a python script as a systemd service and output the contents to a file for tracking.<\/p>\n\n\n\n
So I went off and created a system service (unit) file <\/p>\n\n\n\n
vi \/etc\/systemd\/system\/mycustom.service<\/pre>\n\n\n\nIn it I placed <\/p>\n\n\n\n
[Unit]\r\nDescription=Home Node PIR MQTT\r\nAfter=network.target\r\n\r\n[Service]\r\nUser=larry\r\nGroup=larry\r\nType=simple\r\nStandardError=journal\r\nStandardOutput=journal\r\nStandardInput=null\r\nStandardOutput=file:\/var\/log\/myscustom\/stdout.log\r\nStandardError=file:\/var\/log\/myscustom\/stderr.log\r\nExecStart=\/opt\/bin\/myscustom.py\r\n\r\n[Install]\r\nWantedBy=multi-user.target\r\n<\/pre>\n\n\n\nNote instead of file I could have used append so the file just grows instead of getting replaced everytime things are restarted.<\/p>\n\n\n\n
I did create the folder and chown it with larry:larry but it created the files on restart with owner root so I chowned the files themselves afterwards.<\/p>\n\n\n\n
Another change is the python script itself<\/p>\n\n\n\n
I need to add a -u to the first line like this<\/p>\n\n\n\n
!\/usr\/bin\/python -u<\/pre>\n\n\n\nThat tells python to not buffer standard out and send it immediately, that way systemd can see it.<\/p>\n\n\n\n
On the personal front, son had his Senior day for cross country, where they celebrate the seniors. He did OK today, last year rocking something under 21 would be awesome but I guess I expect more.<\/p>\n\n\n\n
Not getting my steps in, been super tired. I need to sleep earlier.<\/p>\n\n\n\n
Weight: 344.2<\/p>\n","protected":false},"excerpt":{"rendered":"
In Centos 7 I have been running screen on reboot (via cron) to start a script like this. @reboot screen -d -m -S pir \/opt\/bin\/myscustom.py But wanted to be more modern and use systemd unit files and as of Rocky … Continue reading