Well that's because it's not a development workflow. That's a live systems change. It's like changing the tire on a moving vehicle.
If you have a very repeatable environment, you can have an entire pipeline that creates new infra from scratch (w/Terraform), build and deploy your new app, test it, and then point traffic at the new infra. It's like blue/green but bigger. You aren't changing the tire, you're moving from one moving vehicle to another one. That works well because there's no chance for unusual problems from trying to figure out how to re-jigger things on the fly.
The former is configuration-management-organized infrastructure, and the latter is immutable infrastructure.
The problem comes in with things like changing an S3 bucket or IAM role. Changing those things is like changing the highway... you can't replace the highway. You have to close down a lane of traffic, put up traffic cones, reduce the speed limit, make your changes carefully. Ideally test on a strip of test highway first.
These cloud-managed services cannot be made immutable, so you have to use configuration-management. So you have to have a change management system in place, and tightly manage the dependency between your app and the change.
If you have a very repeatable environment, you can have an entire pipeline that creates new infra from scratch (w/Terraform), build and deploy your new app, test it, and then point traffic at the new infra. It's like blue/green but bigger. You aren't changing the tire, you're moving from one moving vehicle to another one. That works well because there's no chance for unusual problems from trying to figure out how to re-jigger things on the fly.
The former is configuration-management-organized infrastructure, and the latter is immutable infrastructure.
The problem comes in with things like changing an S3 bucket or IAM role. Changing those things is like changing the highway... you can't replace the highway. You have to close down a lane of traffic, put up traffic cones, reduce the speed limit, make your changes carefully. Ideally test on a strip of test highway first.
These cloud-managed services cannot be made immutable, so you have to use configuration-management. So you have to have a change management system in place, and tightly manage the dependency between your app and the change.