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amazon-web-servicesubuntuamazon-ec2cloud-init

Cloud-init per-boot script doing nothing

I am new to cloud-init, my final goal is to run an R script each time an EC2 Spot Instance becomes active, but in order to test it I created an on-demand Ubuntu 12.04 instance and created a simple script but nothing happens after reboot. Here are the steps I took:

  • Launched the new Ubunut 12.04 instance
  • Navigate to /var/lib/cloud/scripts/per-boot
  • sudo vi script.sh
  • Added the following code:

#!/bin/sh
echo "test"

  • sudo reboot

At this point I thought I should see a "test" print when the instance reboots, but there is nothing there. I went to take a look at /var/log/cloud-init.log but there is no error or anything out of the ordinary.

I am clearly missing something so any tip in the right direction will be much appreciated!

Thanks!

Solution

  • It won't run unless the scripts user is set to always run. See this answer for more details (and for instructions on how to get scripts to run on reboot, generally).