AWS EC2, Load Balancer and Updating Craft I have a pretty large Craft site that needs to be load balanced with multiple ec2 instances and one RDS mysql instance. Everything is working great, except for I noticed that if I get to the admin panel and run updates on craft/plugins. The site files only change on the ec2 instance i'm on.

Is there a way to update all my ec2 instances at once on update?

Thanks! Any help is appreciated.
Don't update Craft or any plugins on production.

Do the updates on a local/dev version of the site, commit the resulting changes, then deploy those to all of your EC2 instances with a CI/CD service like https://buddy.works or whatever your favorite service is.

Some related blog posts worth reading:

https://nystudio107.com/blog/database-asset-syncing-between-environments-in-craft-cms

https://nystudio107.com/blog/local-development-with-vagrant-homestead