I used to Drupal Cloud Formation sample template to create my Drupal based web site. But now every time my EC2 instance reboot Cloud Formation helper script cfn-init reloads original Drupal installation files and rewrite them into my web site's home folder.
How can I disable cfn-init script?
If you want to completely disable it (although not recommended) as root:
yum remove cloud-init
Otherwise, your Drupal installation might have installed a specific config for cloud init. Look under /etc/cloud/cloud.cfg or any configuration file under /etc/cloud. Disable/delete anything that Drupal might have installed or modified.
