I have a setup with three CloudFormation templates: network.yml, servers.yml, and storage.yml. I host a static website in an S3 bucket, and I'm trying to automatically launch EC2 instances that will have this website's index.html file on them. Since these instances are created through an autoscaling group, I need a way to include this file in my launch template for each new instance that spins up. What's the best approach to achieve this?
2 Answers
It sounds like you're dealing with a unique situation since both your EC2 and S3 bucket are private. One suggestion is to look into using cloud-init for your EC2 instances, which can run scripts during the boot process. You should add an IAM role to your EC2 instances that allows them to access S3 without needing to use hardcoded credentials. This way, your instances can pull the files they need directly from the S3 bucket during startup, which should help streamline your process.
Instead of pulling the static files every time, consider using a CDN for better performance. That said, if you must use CLI commands to copy files, make sure you have the AWS CLI installed on your EC2 instances and configured correctly. You should also confirm your IAM role permissions are set to allow these instances to get data from your S3 bucket.
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