Ubuntu EC2 - Run Python script on reboot

Question

I have an Ubuntu 16.04 EC2 Instance and I need to run a python script every time the instance is Started. I tried everything suggested on every question in the forum and haven't had any luck yet.

Specifically I've tested:

• Adding @reboot python3 /home/project/script.py to crontab
• Adding @reboot /bin/startup.sh and having the bash file configured to run the /home/project/script.py
• Using etc/rc.local , etc/init/mystartup.conf , etc/systemd/mystartup.conf
• Passing User Data

Probably missing a few others and literally nothing worked even though running the script manually works wonders.

Thanks a lot in advance for the help!

Answer 1

Put the script into: /var/lib/cloud/scripts/per-boot/

Cloud-Init, which runs User Data, will also check this directory.

From Modules — cloud-init documentation :

Any scripts in the scripts/per-boot directory on the datasource will be run every time the system boots. Scripts will be run in alphabetical order.